v3.8.0

- print out Node.js and OS information

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+on: [ push, pull_request ]
+jobs:
+  test:
+    strategy:
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+        node: [ "0.10", 0.12, 4, 6, 8, 10, latest ]
+        script: [ compress, mocha, release/benchmark, release/jetstream ]
+    name: ${{ matrix.os }} ${{ matrix.node }} ${{ matrix.script }}
+    runs-on: ${{ matrix.os }}
+    env:
+      NODE: ${{ matrix.node }}
+      TYPE: ${{ matrix.script }}
+    steps:
+      - uses: actions/checkout@v1
+      - uses: actions/cache@v1
+        with:
+          path: tmp
+          key: tmp ${{ matrix.script }}
+      - name: Perform tests
+        shell: bash
+        run: |
+          git clone --branch v1.5.3 --depth 1 https://github.com/jasongin/nvs.git ~/.nvs
+          . ~/.nvs/nvs.sh --version
+          nvs add $NODE
+          nvs use $NODE
+          node --version
+          npm --version --no-update-notifier
+          npm install --no-audit --no-optional --no-save --no-update-notifier
+          node test/$TYPE

.github/workflows/ufuzz.yml

@@ -0,0 +1,25 @@
+name: Fuzzing
+on:
+  schedule:
+    - cron: "*/15 * * * *"
+jobs:
+  ufuzz:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ ubuntu-latest, windows-latest ]
+    name: ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v1
+      - name: Perform fuzzing
+        shell: bash
+        run: |
+          git clone --branch v1.5.3 --depth 1 https://github.com/jasongin/nvs.git ~/.nvs
+          . ~/.nvs/nvs.sh --version
+          nvs add 10
+          nvs use 10
+          node --version
+          npm --version --no-update-notifier
+          npm install --no-audit --no-optional --no-save --no-update-notifier
+          node test/ufuzz/job 3600000

.travis.yml

@@ -1,34 +0,0 @@
-addons:
-  apt:
-    sources:
-      - ubuntu-toolchain-r-test
-    packages:
-      - libstdc++-4.9-dev
-cache:
-  directories: tmp
-language: generic
-matrix:
-  fast_finish: true
-sudo: false
-env:
-  global:
-    - UGLIFYJS_TEST_ALL=1
-  matrix:
-    - NODEJS_VER=node/0.10
-    - NODEJS_VER=node/0.12
-    - NODEJS_VER=node/4
-    - NODEJS_VER=node/6
-    - NODEJS_VER=node/8
-    - NODEJS_VER=node/latest
-before_install:
-  - git clone --branch v1.4.2 --depth 1 https://github.com/jasongin/nvs.git ~/.nvs
-  - . ~/.nvs/nvs.sh
-  - nvs --version
-install:
-  - nvs add $NODEJS_VER
-  - nvs use $NODEJS_VER
-  - node --version
-  - npm --version --no-update-notifier
-  - npm install --no-optional --no-save --no-update-notifier
-script:
-  - npm test --no-update-notifier

LICENSE

@@ -1,6 +1,6 @@
 UglifyJS is released under the BSD license:
 
-Copyright 2012-2018 (c) Mihai Bazon <mihai.bazon@gmail.com>
+Copyright 2012-2019 (c) Mihai Bazon <mihai.bazon@gmail.com>
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions

README.md

@@ -87,6 +87,7 @@ a double dash to prevent input files being used as option arguments:
                                 `wrap_iife`  Wrap IIFEs in parenthesis. Note: you may
                                              want to disable `negate_iife` under
                                              compressor options.
+    -O, --output-opts [options] Specify output options (`beautify` disabled by default).
     -o, --output <file>         Output file path (default STDOUT). Specify `ast` or
                                 `spidermonkey` to write UglifyJS or SpiderMonkey AST
                                 as JSON to STDOUT respectively.
@@ -478,42 +479,42 @@ if (result.error) throw result.error;
 
 ## Minify options
 
-- `warnings` (default `false`) — pass `true` to return compressor warnings
-  in `result.warnings`. Use the value `"verbose"` for more detailed warnings.
-
-- `parse` (default `{}`) — pass an object if you wish to specify some
-  additional [parse options](#parse-options).
-
 - `compress` (default `{}`) — pass `false` to skip compressing entirely.
   Pass an object to specify custom [compress options](#compress-options).
 
+- `ie8` (default `false`) -- set to `true` to support IE8.
+
+- `keep_fnames` (default: `false`) -- pass `true` to prevent discarding or mangling
+  of function names.  Useful for code relying on `Function.prototype.name`.
+
 - `mangle` (default `true`) — pass `false` to skip mangling names, or pass
   an object to specify [mangle options](#mangle-options) (see below).
 
   - `mangle.properties` (default `false`) — a subcategory of the mangle option.
     Pass an object to specify custom [mangle property options](#mangle-properties-options).
 
-- `output` (default `null`) — pass an object if you wish to specify
-  additional [output options](#output-options).  The defaults are optimized
-  for best compression.
-
-- `sourceMap` (default `false`) - pass an object if you wish to specify
-  [source map options](#source-map-options).
-
-- `toplevel` (default `false`) - set to `true` if you wish to enable top level
-  variable and function name mangling and to drop unused variables and functions.
-
-- `nameCache` (default `null`) - pass an empty object `{}` or a previously
+- `nameCache` (default `null`) -- pass an empty object `{}` or a previously
   used `nameCache` object if you wish to cache mangled variable and
   property names across multiple invocations of `minify()`. Note: this is
   a read/write property. `minify()` will read the name cache state of this
   object and update it during minification so that it may be
   reused or externally persisted by the user.
 
-- `ie8` (default `false`) - set to `true` to support IE8.
+- `output` (default `null`) — pass an object if you wish to specify
+  additional [output options](#output-options).  The defaults are optimized
+  for best compression.
 
-- `keep_fnames` (default: `false`) - pass `true` to prevent discarding or mangling
-  of function names.  Useful for code relying on `Function.prototype.name`.
+- `parse` (default `{}`) — pass an object if you wish to specify some
+  additional [parse options](#parse-options).
+
+- `sourceMap` (default `false`) -- pass an object if you wish to specify
+  [source map options](#source-map-options).
+
+- `toplevel` (default `false`) -- set to `true` if you wish to enable top level
+  variable and function name mangling and to drop unused variables and functions.
+
+- `warnings` (default `false`) — pass `true` to return compressor warnings
+  in `result.warnings`. Use the value `"verbose"` for more detailed warnings.
 
 ## Minify options structure
 
@@ -605,6 +606,8 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 - `arguments` (default: `true`) -- replace `arguments[index]` with function
   parameter name whenever possible.
 
+- `assignments` (default: `true`) -- apply optimizations to assignment expressions.
+
 - `booleans` (default: `true`) -- various optimizations for boolean context,
   for example `!!a ? b : c → a ? b : c`
 
@@ -629,11 +632,17 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 
 - `drop_debugger` (default: `true`) -- remove `debugger;` statements
 
-- `evaluate` (default: `true`) -- attempt to evaluate constant expressions
+- `evaluate` (default: `true`) -- Evaluate expression for shorter constant
+  representation. Pass `"eager"` to always replace function calls whenever
+  possible, or a positive integer to specify an upper bound for each individual
+  evaluation in number of characters.
 
 - `expression` (default: `false`) -- Pass `true` to preserve completion values
   from terminal statements without `return`, e.g. in bookmarklets.
 
+- `functions` (default: `true`) -- convert declarations from `var`to `function`
+  whenever possible.
+
 - `global_defs` (default: `{}`) -- see [conditional compilation](#conditional-compilation)
 
 - `hoist_funs` (default: `false`) -- hoist function declarations
@@ -659,12 +668,13 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 
 - `join_vars` (default: `true`) -- join consecutive `var` statements
 
-- `keep_fargs` (default: `true`) -- Prevents the compressor from discarding unused
-  function arguments.  You need this for code which relies on `Function.length`.
+- `keep_fargs` (default: `strict`) -- Discard unused function arguments. Code
+  which relies on `Function.length` will break if this is done indiscriminately,
+  i.e. when passing `true`. Pass `false` to always retain function arguments.
 
 - `keep_fnames` (default: `false`) -- Pass `true` to prevent the
   compressor from discarding function names.  Useful for code relying on
-  `Function.prototype.name`. See also: the `keep_fnames` [mangle option](#mangle).
+  `Function.prototype.name`. See also: the `keep_fnames` [mangle option](#mangle-options).
 
 - `keep_infinity` (default: `false`) -- Pass `true` to prevent `Infinity` from
   being compressed into `1/0`, which may cause performance issues on Chrome.
@@ -676,6 +686,8 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
   where the return value is discarded, to avoid the parens that the
   code generator would insert.
 
+- `objects` (default: `true`) -- compact duplicate keys in object literals.
+
 - `passes` (default: `1`) -- The maximum number of times to run compress.
   In some cases more than one pass leads to further compressed code.  Keep in
   mind more passes will take more time.
@@ -724,6 +736,8 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
   annotation `/*@__PURE__*/` or `/*#__PURE__*/` immediately precedes the call. For
   example: `/*@__PURE__*/foo();`
 
+- `strings` (default: `true`) -- compact string concatenations.
+
 - `switches` (default: `true`) -- de-duplicate and remove unreachable `switch` branches
 
 - `toplevel` (default: `false`) -- drop unreferenced functions (`"funcs"`) and/or
@@ -762,9 +776,6 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 - `unused` (default: `true`) -- drop unreferenced functions and variables (simple
   direct variable assignments do not count as references unless set to `"keep_assign"`)
 
-- `warnings` (default: `false`) -- display warnings when dropping unreachable
-  code or unused declarations etc.
-
 ## Mangle options
 
 - `eval` (default `false`) -- Pass `true` to mangle names visible in scopes
@@ -837,8 +848,14 @@ can pass additional arguments that control the code output:
   statement.
 
 - `comments` (default `false`) -- pass `true` or `"all"` to preserve all
-  comments, `"some"` to preserve some comments, a regular expression string
-  (e.g. `/^!/`) or a function.
+  comments, `"some"` to preserve multi-line comments that contain `@cc_on`,
+  `@license`, or `@preserve` (case-insensitive), a regular expression string
+  (e.g. `/^!/`), or a function which returns `boolean`, e.g.
+  ```js
+  function(node, comment) {
+      return comment.value.indexOf("@type " + node.TYPE) >= 0;
+  }
+  ```
 
 - `indent_level` (default `4`)
 

appveyor.yml

@@ -1,25 +1,5 @@
-environment:
-  UGLIFYJS_TEST_ALL: 1
-  matrix:
-    - NODEJS_VER: node/0.10
-    - NODEJS_VER: node/0.12
-    - NODEJS_VER: node/4
-    - NODEJS_VER: node/6
-    - NODEJS_VER: node/8
-    - NODEJS_VER: node/latest
-install:
-  - git clone --branch v1.4.2 --depth 1 https://github.com/jasongin/nvs.git %LOCALAPPDATA%\nvs
-  - set PATH=%LOCALAPPDATA%\nvs;%PATH%
-  - nvs --version
-  - nvs add %NODEJS_VER%
-  - nvs use %NODEJS_VER%
-  - node --version
-  - npm --version --no-update-notifier
-  - npm install --no-optional --no-save --no-update-notifier
 build: off
-cache:
-  - tmp
 matrix:
   fast_finish: true
 test_script:
-  - npm test --no-update-notifier
+  - echo No longer in use

bin/uglifyjs

@@ -36,6 +36,7 @@ program.option("-c, --compress [options]", "Enable compressor/specify compressor
 program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js());
 program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js());
 program.option("-b, --beautify [options]", "Beautify output/specify output options.", parse_js());
+program.option("-O, --output-opts [options]", "Output options (beautify disabled).", parse_js());
 program.option("-o, --output <file>", "Output file (default STDOUT).");
 program.option("--comments [filter]", "Preserve copyright comments in the output.");
 program.option("--config-file <file>", "Read minify() options from JSON file.");
@@ -53,12 +54,18 @@ program.option("--toplevel", "Compress and/or mangle variables in toplevel scope
 program.option("--verbose", "Print diagnostic messages.");
 program.option("--warn", "Print warning messages.");
 program.option("--wrap <name>", "Embed everything as a function with “exports” corresponding to “name” globally.");
+program.option("--reduce-test", "Reduce a standalone `console.log` based test case.");
 program.arguments("[files...]").parseArgv(process.argv);
 if (program.configFile) {
     options = JSON.parse(read_file(program.configFile));
+    if (options.mangle && options.mangle.properties && options.mangle.properties.regex) {
+        options.mangle.properties.regex = UglifyJS.parse(options.mangle.properties.regex, {
+            expression: true
+        }).value;
+    }
 }
 if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
-    fatal("ERROR: cannot write source map to STDOUT");
+    fatal("cannot write source map to STDOUT");
 }
 [
     "compress",
@@ -73,12 +80,25 @@ if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
         options[name] = program[name];
     }
 });
+if (program.verbose) {
+    options.warnings = "verbose";
+} else if (program.warn) {
+    options.warnings = true;
+}
+if (options.warnings) {
+    UglifyJS.AST_Node.log_function(print_error, options.warnings == "verbose");
+    delete options.warnings;
+}
 if (program.beautify) {
     options.output = typeof program.beautify == "object" ? program.beautify : {};
     if (!("beautify" in options.output)) {
         options.output.beautify = true;
     }
 }
+if (program.outputOpts) {
+    if (program.beautify) fatal("--beautify cannot be used with --output-opts");
+    options.output = typeof program.outputOpts == "object" ? program.outputOpts : {};
+}
 if (program.comments) {
     if (typeof options.output != "object") options.output = {};
     options.output.comments = typeof program.comments == "string" ? program.comments : "some";
@@ -119,7 +139,7 @@ if (program.parse) {
     if (!program.parse.acorn && !program.parse.spidermonkey) {
         options.parse = program.parse;
     } else if (program.sourceMap && program.sourceMap.content == "inline") {
-        fatal("ERROR: inline source map only works with built-in parser");
+        fatal("inline source map only works with built-in parser");
     }
 }
 if (~program.rawArgs.indexOf("--rename")) {
@@ -139,15 +159,8 @@ if (typeof program.sourceMap == "object" && "base" in program.sourceMap) {
         };
     }();
 }
-if (program.verbose) {
-    options.warnings = "verbose";
-} else if (program.warn) {
-    options.warnings = true;
-}
 if (program.self) {
-    if (program.args.length) {
-        print_error("WARN: Ignoring input files since --self was passed");
-    }
+    if (program.args.length) UglifyJS.AST_Node.warn("Ignoring input files since --self was passed");
     if (!options.wrap) options.wrap = "UglifyJS";
     simple_glob(UglifyJS.FILES).forEach(function(name) {
         files[convert_path(name)] = read_file(name);
@@ -175,12 +188,9 @@ function convert_ast(fn) {
 }
 
 function run() {
-    UglifyJS.AST_Node.warn_function = function(msg) {
-        print_error("WARN: " + msg);
-    };
     var content = program.sourceMap && program.sourceMap.content;
     if (content && content != "inline") {
-        print_error("INFO: Using input source map: " + content);
+        UglifyJS.AST_Node.info("Using input source map: " + content);
         options.sourceMap.content = read_file(content, content);
     }
     if (program.timings) options.timings = true;
@@ -206,29 +216,39 @@ function run() {
     } catch (ex) {
         fatal(ex);
     }
-    var result = UglifyJS.minify(files, options);
+    if (program.reduceTest) {
+        // load on demand - assumes dev tree checked out
+        var reduce_test = require("../test/reduce");
+        var testcase = files[0] || files[Object.keys(files)[0]];
+        var result = reduce_test(testcase, options, {verbose: true});
+    }
+    else {
+        var result = UglifyJS.minify(files, options);
+    }
     if (result.error) {
         var ex = result.error;
         if (ex.name == "SyntaxError") {
             print_error("Parse error at " + ex.filename + ":" + ex.line + "," + ex.col);
-            var col = ex.col;
-            var lines = files[ex.filename].split(/\r?\n/);
-            var line = lines[ex.line - 1];
-            if (!line && !col) {
-                line = lines[ex.line - 2];
-                col = line.length;
-            }
-            if (line) {
-                var limit = 70;
-                if (col > limit) {
-                    line = line.slice(col - limit);
-                    col = limit;
+            var file = files[ex.filename];
+            if (file) {
+                var col = ex.col;
+                var lines = file.split(/\r?\n/);
+                var line = lines[ex.line - 1];
+                if (!line && !col) {
+                    line = lines[ex.line - 2];
+                    col = line.length;
+                }
+                if (line) {
+                    var limit = 70;
+                    if (col > limit) {
+                        line = line.slice(col - limit);
+                        col = limit;
+                    }
+                    print_error(line.slice(0, 80));
+                    print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
                 }
-                print_error(line.slice(0, 80));
-                print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
             }
-        }
-        if (ex.defs) {
+        } else if (ex.defs) {
             print_error("Supported options:");
             print_error(format_object(ex.defs));
         }
@@ -288,7 +308,11 @@ function run() {
 }
 
 function fatal(message) {
-    if (message instanceof Error) message = message.stack.replace(/^\S*?Error:/, "ERROR:")
+    if (message instanceof Error) {
+        message = message.stack.replace(/^\S*?Error:/, "ERROR:")
+    } else {
+        message = "ERROR: " + message;
+    }
     print_error(message);
     process.exit(1);
 }
@@ -337,17 +361,9 @@ function parse_js(flag) {
     return function(value, options) {
         options = options || {};
         try {
-            UglifyJS.minify(value, {
-                parse: {
-                    expression: true
-                },
-                compress: false,
-                mangle: false,
-                output: {
-                    ast: true,
-                    code: false
-                }
-            }).ast.walk(new UglifyJS.TreeWalker(function(node) {
+            UglifyJS.parse(value, {
+                expression: true
+            }).walk(new UglifyJS.TreeWalker(function(node) {
                 if (node instanceof UglifyJS.AST_Assign) {
                     var name = node.left.print_to_string();
                     var value = node.right;
@@ -368,14 +384,14 @@ function parse_js(flag) {
                 if (!(node instanceof UglifyJS.AST_Sequence)) throw node;
 
                 function to_string(value) {
-                    return value instanceof UglifyJS.AST_Constant ? value.getValue() : value.print_to_string({
+                    return value instanceof UglifyJS.AST_Constant ? value.value : value.print_to_string({
                         quote_keys: true
                     });
                 }
             }));
-        } catch(ex) {
+        } catch (ex) {
             if (flag) {
-                fatal("Error parsing arguments for '" + flag + "': " + value);
+                fatal("cannot parse arguments for '" + flag + "': " + value);
             } else {
                 options[value] = null;
             }

lib/ast.js

@@ -118,9 +118,25 @@ var AST_Node = DEFNODE("Node", "start end", {
     }
 }, null);
 
-AST_Node.warn = function(txt, props) {
-    if (AST_Node.warn_function) AST_Node.warn_function(string_template(txt, props));
-};
+(AST_Node.log_function = function(fn, verbose) {
+    var printed = Object.create(null);
+    if (fn) {
+        AST_Node.info = verbose ? function(text, props) {
+            log("INFO: " + string_template(text, props));
+        } : noop;
+        AST_Node.warn = function(text, props) {
+            log("WARN: " + string_template(text, props));
+        };
+    } else {
+        AST_Node.info = AST_Node.warn = noop;
+    }
+
+    function log(msg) {
+        if (printed[msg]) return;
+        printed[msg] = true;
+        fn(msg);
+    }
+})();
 
 /* -----[ statements ]----- */
 
@@ -153,10 +169,7 @@ var AST_SimpleStatement = DEFNODE("SimpleStatement", "body", {
 }, AST_Statement);
 
 function walk_body(node, visitor) {
-    var body = node.body;
-    if (body instanceof AST_Statement) {
-        body._walk(visitor);
-    } else body.forEach(function(node) {
+    node.body.forEach(function(node) {
         node._walk(visitor);
     });
 }
@@ -321,18 +334,25 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
     $propdoc: {
         globals: "[Object/S] a map of name -> SymbolDef for all undeclared names",
     },
-    wrap_commonjs: function(name) {
+    wrap: function(name) {
         var body = this.body;
-        var wrapped_tl = "(function(exports){'$ORIG';})(typeof " + name + "=='undefined'?(" + name + "={}):" + name + ");";
-        wrapped_tl = parse(wrapped_tl);
-        wrapped_tl = wrapped_tl.transform(new TreeTransformer(function(node) {
+        return parse([
+            "(function(exports){'$ORIG';})(typeof ",
+            name,
+            "=='undefined'?(",
+            name,
+            "={}):",
+            name,
+            ");"
+        ].join(""), {
+            filename: "wrap=" + JSON.stringify(name)
+        }).transform(new TreeTransformer(function(node) {
             if (node instanceof AST_Directive && node.value == "$ORIG") {
-                return MAP.splice(body);
+                return List.splice(body);
             }
         }));
-        return wrapped_tl;
     },
-    wrap_enclose: function(args_values) {
+    enclose: function(args_values) {
         if (typeof args_values != "string") args_values = "";
         var index = args_values.indexOf(":");
         if (index < 0) index = args_values.length;
@@ -343,15 +363,17 @@ var AST_Toplevel = DEFNODE("Toplevel", "globals", {
             '){"$ORIG"})(',
             args_values.slice(index + 1),
             ")"
-        ].join("")).transform(new TreeTransformer(function(node) {
+        ].join(""), {
+            filename: "enclose=" + JSON.stringify(args_values)
+        }).transform(new TreeTransformer(function(node) {
             if (node instanceof AST_Directive && node.value == "$ORIG") {
-                return MAP.splice(body);
+                return List.splice(body);
             }
         }));
     }
 }, AST_Scope);
 
-var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments", {
+var AST_Lambda = DEFNODE("Lambda", "name argnames uses_arguments length_read", {
     $documentation: "Base class for functions",
     $propdoc: {
         name: "[AST_SymbolDeclaration?] the name of this function",
@@ -589,6 +611,18 @@ var AST_PropAccess = DEFNODE("PropAccess", "expression property", {
     $propdoc: {
         expression: "[AST_Node] the “container” expression",
         property: "[AST_Node|string] the property to access.  For AST_Dot this is always a plain string, while for AST_Sub it's an arbitrary AST_Node"
+    },
+    getProperty: function() {
+        var p = this.property;
+        if (p instanceof AST_Constant) {
+            return p.value;
+        }
+        if (p instanceof AST_UnaryPrefix
+            && p.operator == "void"
+            && p.expression instanceof AST_Constant) {
+            return;
+        }
+        return p;
     }
 });
 
@@ -773,7 +807,7 @@ var AST_Label = DEFNODE("Label", "references", {
     }
 }, AST_Symbol);
 
-var AST_SymbolRef = DEFNODE("SymbolRef", null, {
+var AST_SymbolRef = DEFNODE("SymbolRef", "fixed", {
     $documentation: "Reference to some symbol (not definition/declaration)",
 }, AST_Symbol);
 
@@ -787,9 +821,6 @@ var AST_This = DEFNODE("This", null, {
 
 var AST_Constant = DEFNODE("Constant", null, {
     $documentation: "Base class for all constants",
-    getValue: function() {
-        return this.value;
-    }
 });
 
 var AST_String = DEFNODE("String", "value quote", {
@@ -800,11 +831,10 @@ var AST_String = DEFNODE("String", "value quote", {
     }
 }, AST_Constant);
 
-var AST_Number = DEFNODE("Number", "value literal", {
+var AST_Number = DEFNODE("Number", "value", {
     $documentation: "A number literal",
     $propdoc: {
         value: "[number] the numeric value",
-        literal: "[string] numeric value as string (optional)"
     }
 }, AST_Constant);
 
@@ -931,11 +961,13 @@ TreeWalker.prototype = {
     in_boolean_context: function() {
         var self = this.self();
         for (var i = 0, p; p = this.parent(i); i++) {
-            if (p instanceof AST_SimpleStatement
-                || p instanceof AST_Conditional && p.condition === self
+            if (p instanceof AST_Conditional && p.condition === self
                 || p instanceof AST_DWLoop && p.condition === self
                 || p instanceof AST_For && p.condition === self
                 || p instanceof AST_If && p.condition === self
+                || p instanceof AST_Return && p.in_bool
+                || p instanceof AST_Sequence && p.tail_node() !== self
+                || p instanceof AST_SimpleStatement
                 || p instanceof AST_UnaryPrefix && p.operator == "!" && p.expression === self) {
                 return true;
             }
@@ -943,6 +975,15 @@ TreeWalker.prototype = {
                 || p instanceof AST_Conditional
                 || p.tail_node() === self) {
                 self = p;
+            } else if (p instanceof AST_Return) {
+                var fn;
+                do {
+                    fn = this.parent(++i);
+                    if (!fn) return false;
+                } while (!(fn instanceof AST_Lambda));
+                if (fn.name) return false;
+                self = this.parent(++i);
+                if (!self || self.TYPE != "Call" || self.expression !== fn) return false;
             } else {
                 return false;
             }

lib/minify.js

@@ -1,19 +1,39 @@
 "use strict";
 
-var to_ascii = typeof atob == "undefined" ? function(b64) {
-    return new Buffer(b64, "base64").toString();
-} : atob;
-var to_base64 = typeof btoa == "undefined" ? function(str) {
-    return new Buffer(str).toString("base64");
-} : btoa;
+var to_ascii, to_base64;
+if (typeof Buffer == "undefined") {
+    to_ascii = atob;
+    to_base64 = btoa;
+} else if (typeof Buffer.alloc == "undefined") {
+    to_ascii = function(b64) {
+        return new Buffer(b64, "base64").toString();
+    };
+    to_base64 = function(str) {
+        return new Buffer(str).toString("base64");
+    };
+} else {
+    to_ascii = function(b64) {
+        return Buffer.from(b64, "base64").toString();
+    };
+    to_base64 = function(str) {
+        return Buffer.from(str).toString("base64");
+    };
+}
 
-function read_source_map(name, code) {
-    var match = /\n\/\/# sourceMappingURL=data:application\/json(;.*?)?;base64,(.*)/.exec(code);
-    if (!match) {
-        AST_Node.warn("inline source map not found: " + name);
-        return null;
+function read_source_map(name, toplevel) {
+    var comments = toplevel.end.comments_after;
+    for (var i = comments.length; --i >= 0;) {
+        var comment = comments[i];
+        if (comment.type != "comment1") break;
+        var match = /^# ([^\s=]+)=(\S+)\s*$/.exec(comment.value);
+        if (!match) break;
+        if (match[1] == "sourceMappingURL") {
+            match = /^data:application\/json(;.*?)?;base64,(\S+)$/.exec(match[2]);
+            if (!match) break;
+            return to_ascii(match[2]);
+        }
     }
-    return to_ascii(match[2]);
+    AST_Node.warn("inline source map not found: " + name);
 }
 
 function parse_source_map(content) {
@@ -51,7 +71,6 @@ function to_json(cache) {
 }
 
 function minify(files, options) {
-    var warn_function = AST_Node.warn_function;
     try {
         options = defaults(options, {
             compress: {},
@@ -78,7 +97,6 @@ function minify(files, options) {
         set_shorthand("ie8", options, [ "compress", "mangle", "output" ]);
         set_shorthand("keep_fnames", options, [ "compress", "mangle" ]);
         set_shorthand("toplevel", options, [ "compress", "mangle" ]);
-        set_shorthand("warnings", options, [ "compress" ]);
         var quoted_props;
         if (options.mangle) {
             options.mangle = defaults(options.mangle, {
@@ -116,11 +134,9 @@ function minify(files, options) {
             }, true);
         }
         var warnings = [];
-        if (options.warnings && !AST_Node.warn_function) {
-            AST_Node.warn_function = function(warning) {
-                warnings.push(warning);
-            };
-        }
+        if (options.warnings) AST_Node.log_function(function(warning) {
+            warnings.push(warning);
+        }, options.warnings == "verbose");
         if (timings) timings.parse = Date.now();
         var source_maps, toplevel;
         if (files instanceof AST_Toplevel) {
@@ -138,10 +154,10 @@ function minify(files, options) {
             source_maps = source_map_content && Object.create(null);
             for (var name in files) if (HOP(files, name)) {
                 options.parse.filename = name;
-                options.parse.toplevel = parse(files[name], options.parse);
+                options.parse.toplevel = toplevel = parse(files[name], options.parse);
                 if (source_maps) {
                     if (source_map_content == "inline") {
-                        var inlined_content = read_source_map(name, files[name]);
+                        var inlined_content = read_source_map(name, toplevel);
                         if (inlined_content) {
                             source_maps[name] = parse_source_map(inlined_content);
                         }
@@ -150,17 +166,17 @@ function minify(files, options) {
                     }
                 }
             }
-            toplevel = options.parse.toplevel;
         }
         if (quoted_props) {
             reserve_quoted_keys(toplevel, quoted_props);
         }
-        if (options.wrap) {
-            toplevel = toplevel.wrap_commonjs(options.wrap);
-        }
-        if (options.enclose) {
-            toplevel = toplevel.wrap_enclose(options.enclose);
-        }
+        [ "enclose", "wrap" ].forEach(function(action) {
+            var option = options[action];
+            if (!option) return;
+            var orig = toplevel.print_to_string().slice(0, -1);
+            toplevel = toplevel[action](option);
+            files[toplevel.start.file] = toplevel.print_to_string().replace(orig, "");
+        });
         if (timings) timings.rename = Date.now();
         if (options.rename) {
             toplevel.figure_out_scope(options.mangle);
@@ -208,10 +224,14 @@ function minify(files, options) {
             result.code = stream.get();
             if (options.sourceMap) {
                 result.map = options.output.source_map.toString();
-                if (options.sourceMap.url == "inline") {
-                    result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(result.map);
-                } else if (options.sourceMap.url) {
-                    result.code += "\n//# sourceMappingURL=" + options.sourceMap.url;
+                var url = options.sourceMap.url;
+                if (url) {
+                    result.code = result.code.replace(/\n\/\/# sourceMappingURL=\S+\s*$/, "");
+                    if (url == "inline") {
+                        result.code += "\n//# sourceMappingURL=data:application/json;charset=utf-8;base64," + to_base64(result.map);
+                    } else {
+                        result.code += "\n//# sourceMappingURL=" + url;
+                    }
                 }
             }
         }
@@ -232,7 +252,7 @@ function minify(files, options) {
                 properties: 1e-3 * (timings.output - timings.properties),
                 output: 1e-3 * (timings.end - timings.output),
                 total: 1e-3 * (timings.end - timings.start)
-            }
+            };
         }
         if (warnings.length) {
             result.warnings = warnings;
@@ -240,7 +260,5 @@ function minify(files, options) {
         return result;
     } catch (ex) {
         return { error: ex };
-    } finally {
-        AST_Node.warn_function = warn_function;
     }
 }

lib/mozilla-ast.js

@@ -403,7 +403,7 @@
         var def = M.definition();
         return {
             type: "Identifier",
-            name: def ? def.mangled_name || def.name : M.name
+            name: def && def.mangled_name || M.name
         };
     });
 

lib/output.js

@@ -43,8 +43,6 @@
 
 "use strict";
 
-var EXPECT_DIRECTIVE = /^$|[;{][\s\n]*$/;
-
 function is_some_comments(comment) {
     // multiline comment
     return comment.type == "comment2" && /@preserve|@license|@cc_on/i.test(comment.value);
@@ -91,13 +89,11 @@ function OutputStream(options) {
             comment_filter = function(comment) {
                 return comment.type != "comment5" && comments.test(comment.value);
             };
-        }
-        else if (typeof comments === "function") {
+        } else if (typeof comments === "function") {
             comment_filter = function(comment) {
                 return comment.type != "comment5" && comments(this, comment);
             };
-        }
-        else if (comments === "some") {
+        } else if (comments === "some") {
             comment_filter = is_some_comments;
         } else { // NOTE includes "all" option
             comment_filter = return_true;
@@ -123,21 +119,25 @@ function OutputStream(options) {
         });
     } : function(str) {
         var s = "";
-        for (var i = 0, len = str.length; i < len; i++) {
-            if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1])
-                || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) {
-                s += "\\u" + str.charCodeAt(i).toString(16);
-            } else {
-                s += str[i];
+        for (var i = 0, j = 0; i < str.length; i++) {
+            var code = str.charCodeAt(i);
+            if (is_surrogate_pair_head(code)) {
+                if (is_surrogate_pair_tail(str.charCodeAt(i + 1))) {
+                    i++;
+                    continue;
+                }
+            } else if (!is_surrogate_pair_tail(code)) {
+                continue;
             }
+            s += str.slice(j, i) + "\\u" + code.toString(16);
+            j = i + 1;
         }
-        return s;
+        return j == 0 ? str : s + str.slice(j);
     };
 
     function make_string(str, quote) {
         var dq = 0, sq = 0;
-        str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g,
-          function(s, i) {
+        str = str.replace(/[\\\b\f\n\r\v\t\x22\x27\u2028\u2029\0\ufeff]/g, function(s, i) {
             switch (s) {
               case '"': ++dq; return '"';
               case "'": ++sq; return "'";
@@ -217,23 +217,12 @@ function OutputStream(options) {
 
     var flush_mappings = mappings ? function() {
         mappings.forEach(function(mapping) {
-            try {
-                options.source_map.add(
-                    mapping.token.file,
-                    mapping.line, mapping.col,
-                    mapping.token.line, mapping.token.col,
-                    !mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name
-                );
-            } catch(ex) {
-                AST_Node.warn("Couldn't figure out mapping for {file}:{line},{col} → {cline},{ccol} [{name}]", {
-                    file: mapping.token.file,
-                    line: mapping.token.line,
-                    col: mapping.token.col,
-                    cline: mapping.line,
-                    ccol: mapping.col,
-                    name: mapping.name || ""
-                })
-            }
+            options.source_map.add(
+                mapping.token.file,
+                mapping.line, mapping.col,
+                mapping.token.line, mapping.token.col,
+                !mapping.name && mapping.token.type == "name" ? mapping.token.value : mapping.name
+            );
         });
         mappings = [];
     } : noop;
@@ -283,7 +272,7 @@ function OutputStream(options) {
             }
         }
         newline_insert = -1;
-        var prev = last.charAt(last.length - 1);
+        var prev = last.slice(-1);
         if (might_need_semicolon) {
             might_need_semicolon = false;
 
@@ -312,16 +301,16 @@ function OutputStream(options) {
         }
 
         if (might_need_space) {
-            if ((is_identifier_char(prev)
-                    && (is_identifier_char(ch) || ch == "\\"))
+            if (is_identifier_char(prev) && (is_identifier_char(ch) || ch == "\\")
                 || (ch == "/" && ch == prev)
-                || ((ch == "+" || ch == "-") && ch == last))
-            {
+                || ((ch == "+" || ch == "-") && ch == last)
+                || str == "--" && last == "!"
+                || last == "--" && ch == ">") {
                 OUTPUT += " ";
                 current_col++;
                 current_pos++;
             }
-            might_need_space = false;
+            if (prev != "<" || str != "!") might_need_space = false;
         }
 
         if (mapping_token) {
@@ -336,7 +325,7 @@ function OutputStream(options) {
         }
 
         OUTPUT += str;
-        has_parens = str[str.length - 1] == "(";
+        has_parens = str.slice(-1) == "(";
         current_pos += str.length;
         var a = str.split(/\r?\n/), n = a.length - 1;
         current_line += n;
@@ -392,7 +381,7 @@ function OutputStream(options) {
     };
 
     function force_semicolon() {
-        might_need_semicolon = false;
+        if (might_need_semicolon) print(";");
         print(";");
     }
 
@@ -462,16 +451,11 @@ function OutputStream(options) {
 
     function prepend_comments(node) {
         var self = this;
-        var start = node.start;
-        if (!start) return;
-        if (start.comments_before && start.comments_before._dumped === self) return;
-        var comments = start.comments_before;
-        if (!comments) {
-            comments = start.comments_before = [];
-        }
-        comments._dumped = self;
+        var scan = node instanceof AST_Exit && node.value;
+        var comments = dump(node);
+        if (!comments) comments = [];
 
-        if (node instanceof AST_Exit && node.value) {
+        if (scan) {
             var tw = new TreeWalker(function(node) {
                 var parent = tw.parent();
                 if (parent instanceof AST_Exit
@@ -482,11 +466,8 @@ function OutputStream(options) {
                     || parent instanceof AST_Sequence && parent.expressions[0] === node
                     || parent instanceof AST_Sub && parent.expression === node
                     || parent instanceof AST_UnaryPostfix) {
-                    var text = node.start.comments_before;
-                    if (text && text._dumped !== self) {
-                        text._dumped = self;
-                        comments = comments.concat(text);
-                    }
+                    var before = dump(node);
+                    if (before) comments = comments.concat(before);
                 } else {
                     return true;
                 }
@@ -529,13 +510,29 @@ function OutputStream(options) {
             }
         });
         if (!last_nlb) {
-            if (start.nlb) {
+            if (node.start.nlb) {
                 print("\n");
                 indent();
             } else {
                 space();
             }
         }
+
+        function dump(node) {
+            var token = node.start;
+            if (!token) {
+                if (!scan) return;
+                node.start = token = new AST_Token();
+            }
+            var comments = token.comments_before;
+            if (!comments) {
+                if (!scan) return;
+                token.comments_before = comments = [];
+            }
+            if (comments._dumped === self) return;
+            comments._dumped = self;
+            return comments;
+        }
     }
 
     function append_comments(node, tail) {
@@ -591,18 +588,7 @@ function OutputStream(options) {
         force_semicolon : force_semicolon,
         to_utf8         : to_utf8,
         print_name      : function(name) { print(make_name(name)) },
-        print_string    : function(str, quote, escape_directive) {
-            var encoded = encode_string(str, quote);
-            if (escape_directive === true && encoded.indexOf("\\") === -1) {
-                // Insert semicolons to break directive prologue
-                if (!EXPECT_DIRECTIVE.test(OUTPUT)) {
-                    force_semicolon();
-                }
-                force_semicolon();
-            }
-            print(encoded);
-        },
-        encode_string   : encode_string,
+        print_string    : function(str, quote) { print(encode_string(str, quote)) },
         next_indent     : next_indent,
         with_indent     : with_indent,
         with_block      : with_block,
@@ -640,18 +626,10 @@ function OutputStream(options) {
         nodetype.DEFMETHOD("_codegen", generator);
     }
 
-    var in_directive = false;
-    var active_scope = null;
-    var use_asm = null;
+    var use_asm = false;
 
     AST_Node.DEFMETHOD("print", function(stream, force_parens) {
         var self = this, generator = self._codegen;
-        if (self instanceof AST_Scope) {
-            active_scope = self;
-        }
-        else if (!use_asm && self instanceof AST_Directive && self.value == "use asm") {
-            use_asm = active_scope;
-        }
         function doit() {
             stream.prepend_comments(self);
             self.add_source_map(stream);
@@ -665,9 +643,6 @@ function OutputStream(options) {
             doit();
         }
         stream.pop_node();
-        if (self === use_asm) {
-            use_asm = null;
-        }
     });
     AST_Node.DEFMETHOD("_print", AST_Node.prototype.print);
 
@@ -694,23 +669,15 @@ function OutputStream(options) {
     // a function expression needs parens around it when it's provably
     // the first token to appear in a statement.
     PARENS(AST_Function, function(output) {
-        if (!output.has_parens() && first_in_statement(output)) {
-            return true;
-        }
-
+        if (!output.has_parens() && first_in_statement(output)) return true;
         if (output.option('webkit')) {
             var p = output.parent();
-            if (p instanceof AST_PropAccess && p.expression === this) {
-                return true;
-            }
+            if (p instanceof AST_PropAccess && p.expression === this) return true;
         }
-
         if (output.option('wrap_iife')) {
             var p = output.parent();
-            return p instanceof AST_Call && p.expression === this;
+            if (p instanceof AST_Call && p.expression === this) return true;
         }
-
-        return false;
     });
 
     // same goes for an object literal, because otherwise it would be
@@ -727,16 +694,23 @@ function OutputStream(options) {
 
     PARENS(AST_Sequence, function(output) {
         var p = output.parent();
-        return p instanceof AST_Call             // (foo, bar)() or foo(1, (2, 3), 4)
-            || p instanceof AST_Unary            // !(foo, bar, baz)
-            || p instanceof AST_Binary           // 1 + (2, 3) + 4 ==> 8
-            || p instanceof AST_VarDef           // var a = (1, 2), b = a + a; ==> b == 4
-            || p instanceof AST_PropAccess       // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2
-            || p instanceof AST_Array            // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
-            || p instanceof AST_ObjectProperty   // { foo: (1, 2) }.foo ==> 2
-            || p instanceof AST_Conditional      /* (false, true) ? (a = 10, b = 20) : (c = 30)
-                                                  * ==> 20 (side effect, set a := 10 and b := 20) */
-        ;
+            // (foo, bar)() or foo(1, (2, 3), 4)
+        return p instanceof AST_Call
+            // !(foo, bar, baz)
+            || p instanceof AST_Unary
+            // 1 + (2, 3) + 4 ==> 8
+            || p instanceof AST_Binary
+            // var a = (1, 2), b = a + a; ==> b == 4
+            || p instanceof AST_VarDef
+            // (1, {foo:2}).foo or (1, {foo:2})["foo"] ==> 2
+            || p instanceof AST_PropAccess && p.expression === this
+            // [ 1, (2, 3), 4 ] ==> [ 1, 3, 4 ]
+            || p instanceof AST_Array
+            // { foo: (1, 2) }.foo ==> 2
+            || p instanceof AST_ObjectProperty
+            // (false, true) ? (a = 10, b = 20) : (c = 30)
+            // ==> 20 (side effect, set a := 10 and b := 20)
+            || p instanceof AST_Conditional;
     });
 
     PARENS(AST_Binary, function(output) {
@@ -784,17 +758,17 @@ function OutputStream(options) {
     });
 
     PARENS(AST_Call, function(output) {
-        var p = output.parent(), p1;
-        if (p instanceof AST_New && p.expression === this)
-            return true;
-
-        // workaround for Safari bug.
+        var p = output.parent();
+        if (p instanceof AST_New && p.expression === this) return true;
         // https://bugs.webkit.org/show_bug.cgi?id=123506
-        return this.expression instanceof AST_Function
-            && p instanceof AST_PropAccess
-            && p.expression === this
-            && (p1 = output.parent(1)) instanceof AST_Assign
-            && p1.left === p;
+        if (output.option('webkit')) {
+            var g = output.parent(1);
+            return this.expression instanceof AST_Function
+                && p instanceof AST_PropAccess
+                && p.expression === this
+                && g instanceof AST_Assign
+                && g.left === p;
+        }
     });
 
     PARENS(AST_New, function(output) {
@@ -808,7 +782,9 @@ function OutputStream(options) {
     PARENS(AST_Number, function(output) {
         var p = output.parent();
         if (p instanceof AST_PropAccess && p.expression === this) {
-            var value = this.getValue();
+            var value = this.value;
+            // https://github.com/mishoo/UglifyJS2/issues/115
+            // https://github.com/mishoo/UglifyJS2/pull/1009
             if (value < 0 || /^0/.test(make_num(value))) {
                 return true;
             }
@@ -837,7 +813,18 @@ function OutputStream(options) {
     /* -----[ PRINTERS ]----- */
 
     DEFPRINT(AST_Directive, function(self, output) {
-        output.print_string(self.value, self.quote);
+        var quote = self.quote;
+        var value = self.value;
+        switch (output.option("quote_style")) {
+          case 0:
+          case 2:
+            if (value.indexOf('"') == -1) quote = '"';
+            break;
+          case 1:
+            if (value.indexOf("'") == -1) quote = "'";
+            break;
+        }
+        output.print(quote + value + quote);
         output.semicolon();
     });
     DEFPRINT(AST_Debugger, function(self, output) {
@@ -849,30 +836,27 @@ function OutputStream(options) {
 
     function display_body(body, is_toplevel, output, allow_directives) {
         var last = body.length - 1;
-        in_directive = allow_directives;
+        var in_directive = allow_directives;
+        var was_asm = use_asm;
         body.forEach(function(stmt, i) {
-            if (in_directive === true && !(stmt instanceof AST_Directive ||
-                stmt instanceof AST_EmptyStatement ||
-                (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String)
-            )) {
-                in_directive = false;
-            }
-            if (!(stmt instanceof AST_EmptyStatement)) {
-                output.indent();
-                stmt.print(output);
-                if (!(i == last && is_toplevel)) {
-                    output.newline();
-                    if (is_toplevel) output.newline();
+            if (in_directive) {
+                if (stmt instanceof AST_Directive) {
+                    if (stmt.value == "use asm") use_asm = true;
+                } else if (!(stmt instanceof AST_EmptyStatement)) {
+                    if (stmt instanceof AST_SimpleStatement && stmt.body instanceof AST_String) {
+                        output.force_semicolon();
+                    }
+                    in_directive = false;
                 }
             }
-            if (in_directive === true &&
-                stmt instanceof AST_SimpleStatement &&
-                stmt.body instanceof AST_String
-            ) {
-                in_directive = false;
-            }
+            if (stmt instanceof AST_EmptyStatement) return;
+            output.indent();
+            stmt.print(output);
+            if (i == last && is_toplevel) return;
+            output.newline();
+            if (is_toplevel) output.newline();
         });
-        in_directive = false;
+        use_asm = was_asm;
     }
 
     AST_StatementWithBody.DEFMETHOD("_do_print_body", function(output) {
@@ -1056,11 +1040,9 @@ function OutputStream(options) {
                     return;
                 }
                 b = b.alternative;
-            }
-            else if (b instanceof AST_StatementWithBody) {
+            } else if (b instanceof AST_StatementWithBody) {
                 b = b.body;
-            }
-            else break;
+            } else break;
         }
         force_statement(self.body, output);
     }
@@ -1232,7 +1214,7 @@ function OutputStream(options) {
             output.print_string(prop);
             output.print("]");
         } else {
-            if (expr instanceof AST_Number && expr.getValue() >= 0) {
+            if (expr instanceof AST_Number && expr.value >= 0) {
                 if (!/[xa-f.)]/i.test(output.last())) {
                     output.print(".");
                 }
@@ -1265,29 +1247,10 @@ function OutputStream(options) {
         output.print(self.operator);
     });
     DEFPRINT(AST_Binary, function(self, output) {
-        var op = self.operator;
         self.left.print(output);
-        if (op[0] == ">" /* ">>" ">>>" ">" ">=" */
-            && self.left instanceof AST_UnaryPostfix
-            && self.left.operator == "--") {
-            // space is mandatory to avoid outputting -->
-            output.print(" ");
-        } else {
-            // the space is optional depending on "beautify"
-            output.space();
-        }
-        output.print(op);
-        if ((op == "<" || op == "<<")
-            && self.right instanceof AST_UnaryPrefix
-            && self.right.operator == "!"
-            && self.right.expression instanceof AST_UnaryPrefix
-            && self.right.expression.operator == "--") {
-            // space is mandatory to avoid outputting <!--
-            output.print(" ");
-        } else {
-            // the space is optional depending on "beautify"
-            output.space();
-        }
+        output.space();
+        output.print(self.operator);
+        output.space();
         self.right.print(output);
     });
     DEFPRINT(AST_Conditional, function(self, output) {
@@ -1368,34 +1331,60 @@ function OutputStream(options) {
     });
     DEFPRINT(AST_Symbol, function(self, output) {
         var def = self.definition();
-        output.print_name(def ? def.mangled_name || def.name : self.name);
+        output.print_name(def && def.mangled_name || self.name);
     });
     DEFPRINT(AST_Hole, noop);
     DEFPRINT(AST_This, function(self, output) {
         output.print("this");
     });
     DEFPRINT(AST_Constant, function(self, output) {
-        output.print(self.getValue());
+        output.print(self.value);
     });
     DEFPRINT(AST_String, function(self, output) {
-        output.print_string(self.getValue(), self.quote, in_directive);
+        output.print_string(self.value, self.quote);
     });
     DEFPRINT(AST_Number, function(self, output) {
         if (use_asm && self.start && self.start.raw != null) {
             output.print(self.start.raw);
         } else {
-            output.print(make_num(self.getValue()));
+            output.print(make_num(self.value));
         }
     });
 
     DEFPRINT(AST_RegExp, function(self, output) {
-        var regexp = self.getValue();
+        var regexp = self.value;
         var str = regexp.toString();
+        var end = str.lastIndexOf("/");
         if (regexp.raw_source) {
-            str = "/" + regexp.raw_source + str.slice(str.lastIndexOf("/"));
+            str = "/" + regexp.raw_source + str.slice(end);
+        } else if (end == 1) {
+            str = "/(?:)" + str.slice(end);
+        } else if (str.indexOf("/", 1) < end) {
+            str = "/" + str.slice(1, end).replace(/\\\\|[^/]?\//g, function(match) {
+                return match[0] == "\\" ? match : match.slice(0, -1) + "\\/";
+            }) + str.slice(end);
         }
-        str = output.to_utf8(str);
-        output.print(str);
+        output.print(output.to_utf8(str).replace(/\\(?:\0(?![0-9])|[^\0])/g, function(match) {
+            switch (match[1]) {
+              case "\n": return "\\n";
+              case "\r": return "\\r";
+              case "\t": return "\t";
+              case "\b": return "\b";
+              case "\f": return "\f";
+              case "\0": return "\0";
+              case "\x0B": return "\v";
+              case "\u2028": return "\\u2028";
+              case "\u2029": return "\\u2029";
+              default: return match;
+            }
+        }).replace(/[\n\r\u2028\u2029]/g, function(c) {
+            switch (c) {
+              case "\n": return "\\n";
+              case "\r": return "\\r";
+              case "\u2028": return "\\u2028";
+              case "\u2029": return "\\u2029";
+            }
+        }));
         var p = output.parent();
         if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self)
             output.print(" ");

lib/parse.js

@@ -133,14 +133,10 @@ function is_letter(code) {
 }
 
 function is_surrogate_pair_head(code) {
-    if (typeof code == "string")
-        code = code.charCodeAt(0);
     return code >= 0xd800 && code <= 0xdbff;
 }
 
 function is_surrogate_pair_tail(code) {
-    if (typeof code == "string")
-        code = code.charCodeAt(0);
     return code >= 0xdc00 && code <= 0xdfff;
 }
 
@@ -164,10 +160,6 @@ function is_unicode_connector_punctuation(ch) {
     return UNICODE.connector_punctuation.test(ch);
 }
 
-function is_identifier(name) {
-    return !RESERVED_WORDS[name] && /^[a-z_$][a-z0-9_$]*$/i.test(name);
-}
-
 function is_identifier_start(code) {
     return code == 36 || code == 95 || is_letter(code);
 }
@@ -238,6 +230,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         directives      : {},
         directive_stack : []
     };
+    var prev_was_dot = false;
 
     function peek() {
         return S.text.charAt(S.pos);
@@ -272,10 +265,8 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
 
     function find_eol() {
         var text = S.text;
-        for (var i = S.pos, n = S.text.length; i < n; ++i) {
-            var ch = text[i];
-            if (NEWLINE_CHARS[ch])
-                return i;
+        for (var i = S.pos; i < S.text.length; ++i) {
+            if (NEWLINE_CHARS[text[i]]) return i;
         }
         return -1;
     }
@@ -292,16 +283,12 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         S.tokpos = S.pos;
     }
 
-    var prev_was_dot = false;
     function token(type, value, is_comment) {
-        S.regex_allowed = ((type == "operator" && !UNARY_POSTFIX[value]) ||
-                           (type == "keyword" && KEYWORDS_BEFORE_EXPRESSION[value]) ||
-                           (type == "punc" && PUNC_BEFORE_EXPRESSION[value]));
-        if (type == "punc" && value == ".") {
-            prev_was_dot = true;
-        } else if (!is_comment) {
-            prev_was_dot = false;
-        }
+        S.regex_allowed = type == "operator" && !UNARY_POSTFIX[value]
+            || type == "keyword" && KEYWORDS_BEFORE_EXPRESSION[value]
+            || type == "punc" && PUNC_BEFORE_EXPRESSION[value];
+        if (type == "punc" && value == ".") prev_was_dot = true;
+        else if (!is_comment) prev_was_dot = false;
         var ret = {
             type    : type,
             value   : value,
@@ -364,11 +351,8 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             parse_error("Legacy octal literals are not allowed in strict mode");
         }
         var valid = parse_js_number(num);
-        if (!isNaN(valid)) {
-            return token("num", valid);
-        } else {
-            parse_error("Invalid syntax: " + num);
-        }
+        if (!isNaN(valid)) return token("num", valid);
+        parse_error("Invalid syntax: " + num);
     }
 
     function read_escaped_char(in_string) {
@@ -469,8 +453,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
                 if (ch == "\\") escaped = backslash = true, next();
                 else if (is_identifier_char(ch)) name += next();
                 else break;
-            }
-            else {
+            } else {
                 if (ch != "u") parse_error("Expecting UnicodeEscapeSequence -- uXXXX");
                 ch = read_escaped_char();
                 if (!is_identifier_char(ch)) parse_error("Unicode char: " + ch.charCodeAt(0) + " is not valid in identifier");
@@ -510,7 +493,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             var regexp = new RegExp(source, mods);
             regexp.raw_source = source;
             return token("regexp", regexp);
-        } catch(e) {
+        } catch (e) {
             parse_error(e.message);
         }
     });
@@ -544,9 +527,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
 
     function handle_dot() {
         next();
-        return is_digit(peek().charCodeAt(0))
-            ? read_num(".")
-            : token("punc", ".");
+        return is_digit(peek().charCodeAt(0)) ? read_num(".") : token("punc", ".");
     }
 
     function read_word() {
@@ -562,7 +543,7 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
         return function(x) {
             try {
                 return cont(x);
-            } catch(ex) {
+            } catch (ex) {
                 if (ex === EX_EOF) parse_error(eof_error);
                 else throw ex;
             }
@@ -598,11 +579,10 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
             switch (code) {
               case 34: case 39: return read_string(ch);
               case 46: return handle_dot();
-              case 47: {
-                  var tok = handle_slash();
-                  if (tok === next_token) continue;
-                  return tok;
-              }
+              case 47:
+                var tok = handle_slash();
+                if (tok === next_token) continue;
+                return tok;
             }
             if (is_digit(code)) return read_num();
             if (PUNC_CHARS[ch]) return token("punc", next());
@@ -620,12 +600,8 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
 
     next_token.add_directive = function(directive) {
         S.directive_stack[S.directive_stack.length - 1].push(directive);
-
-        if (S.directives[directive] === undefined) {
-            S.directives[directive] = 1;
-        } else {
-            S.directives[directive]++;
-        }
+        if (S.directives[directive]) S.directives[directive]++;
+        else S.directives[directive] = 1;
     }
 
     next_token.push_directives_stack = function() {
@@ -633,13 +609,10 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
     }
 
     next_token.pop_directives_stack = function() {
-        var directives = S.directive_stack[S.directive_stack.length - 1];
-
-        for (var i = 0; i < directives.length; i++) {
+        var directives = S.directive_stack.pop();
+        for (var i = directives.length; --i >= 0;) {
             S.directives[directives[i]]--;
         }
-
-        S.directive_stack.pop();
     }
 
     next_token.has_directive = function(directive) {
@@ -651,27 +624,17 @@ function tokenizer($TEXT, filename, html5_comments, shebang) {
 
 /* -----[ Parser (constants) ]----- */
 
-var UNARY_PREFIX = makePredicate([
-    "typeof",
-    "void",
-    "delete",
-    "--",
-    "++",
-    "!",
-    "~",
-    "-",
-    "+"
-]);
+var UNARY_PREFIX = makePredicate("typeof void delete -- ++ ! ~ - +");
 
-var UNARY_POSTFIX = makePredicate([ "--", "++" ]);
+var UNARY_POSTFIX = makePredicate("-- ++");
 
-var ASSIGNMENT = makePredicate([ "=", "+=", "-=", "/=", "*=", "%=", ">>=", "<<=", ">>>=", "|=", "^=", "&=" ]);
+var ASSIGNMENT = makePredicate("= += -= /= *= %= >>= <<= >>>= |= ^= &=");
 
 var PRECEDENCE = function(a, ret) {
-    for (var i = 0; i < a.length; ++i) {
-        var b = a[i];
-        for (var j = 0; j < b.length; ++j) {
-            ret[b[j]] = i + 1;
+    for (var i = 0; i < a.length;) {
+        var b = a[i++];
+        for (var j = 0; j < b.length; j++) {
+            ret[b[j]] = i;
         }
     }
     return ret;
@@ -688,7 +651,7 @@ var PRECEDENCE = function(a, ret) {
     ["*", "/", "%"]
 ], {});
 
-var ATOMIC_START_TOKEN = makePredicate([ "atom", "num", "string", "regexp", "name" ]);
+var ATOMIC_START_TOKEN = makePredicate("atom num string regexp name");
 
 /* -----[ Parser ]----- */
 
@@ -704,10 +667,9 @@ function parse($TEXT, options) {
     }, true);
 
     var S = {
-        input         : (typeof $TEXT == "string"
-                         ? tokenizer($TEXT, options.filename,
-                                     options.html5_comments, options.shebang)
-                         : $TEXT),
+        input         : typeof $TEXT == "string"
+                        ? tokenizer($TEXT, options.filename, options.html5_comments, options.shebang)
+                        : $TEXT,
         token         : null,
         prev          : null,
         peeked        : null,
@@ -758,17 +720,18 @@ function parse($TEXT, options) {
         croak(msg, token.line, token.col);
     }
 
+    function token_to_string(type, value) {
+        return type + (value === undefined ? "" : " «" + value + "»");
+    }
+
     function unexpected(token) {
-        if (token == null)
-            token = S.token;
-        token_error(token, "Unexpected token: " + token.type + " (" + token.value + ")");
+        if (token == null) token = S.token;
+        token_error(token, "Unexpected token: " + token_to_string(token.type, token.value));
     }
 
     function expect_token(type, val) {
-        if (is(type, val)) {
-            return next();
-        }
-        token_error(S.token, "Unexpected token " + S.token.type + " «" + S.token.value + "»" + ", expected " + type + " «" + val + "»");
+        if (is(type, val)) return next();
+        token_error(S.token, "Unexpected token: " + token_to_string(S.token.type, S.token.value) + ", expected: " + token_to_string(type, val));
     }
 
     function expect(punc) {
@@ -788,7 +751,7 @@ function parse($TEXT, options) {
 
     function semicolon(optional) {
         if (is("punc", ";")) next();
-        else if (!optional && !can_insert_semicolon()) unexpected();
+        else if (!optional && !can_insert_semicolon()) expect_token("punc", ";");
     }
 
     function parenthesised() {
@@ -820,20 +783,19 @@ function parse($TEXT, options) {
         handle_regexp();
         switch (S.token.type) {
           case "string":
-            if (S.in_directives) {
-                var token = peek();
-                if (S.token.raw.indexOf("\\") == -1
-                    && (is_token(token, "punc", ";")
-                        || is_token(token, "punc", "}")
-                        || has_newline_before(token)
-                        || is_token(token, "eof"))) {
-                    S.input.add_directive(S.token.value);
+            var dir = S.in_directives;
+            var body = expression(true);
+            if (dir) {
+                if (body instanceof AST_String) {
+                    var value = body.start.raw.slice(1, -1);
+                    S.input.add_directive(value);
+                    body.value = value;
                 } else {
-                    S.in_directives = false;
+                    S.in_directives = dir = false;
                 }
             }
-            var dir = S.in_directives, stat = simple_statement();
-            return dir ? new AST_Directive(stat.body) : stat;
+            semicolon();
+            return dir ? new AST_Directive(body) : new AST_SimpleStatement({ body: body });
           case "num":
           case "regexp":
           case "operator":
@@ -998,8 +960,10 @@ function parse($TEXT, options) {
         return new AST_LabeledStatement({ body: stat, label: label });
     }
 
-    function simple_statement(tmp) {
-        return new AST_SimpleStatement({ body: (tmp = expression(true), semicolon(), tmp) });
+    function simple_statement() {
+        var body = expression(true);
+        semicolon();
+        return new AST_SimpleStatement({ body: body });
     }
 
     function break_cont(type) {
@@ -1069,7 +1033,7 @@ function parse($TEXT, options) {
         var in_statement = ctor === AST_Defun;
         var name = is("name") ? as_symbol(in_statement ? AST_SymbolDefun : AST_SymbolLambda) : null;
         if (in_statement && !name)
-            unexpected();
+            expect_token("name");
         if (name && ctor !== AST_Accessor && !(name instanceof AST_SymbolDeclaration))
             unexpected(prev());
         expect("(");
@@ -1119,7 +1083,7 @@ function parse($TEXT, options) {
         expect("{");
         var a = [];
         while (!is("punc", "}")) {
-            if (is("eof")) unexpected();
+            if (is("eof")) expect_token("punc", "}");
             a.push(statement(strict_defun));
         }
         next();
@@ -1130,7 +1094,7 @@ function parse($TEXT, options) {
         expect("{");
         var a = [], cur = null, branch = null, tmp;
         while (!is("punc", "}")) {
-            if (is("eof")) unexpected();
+            if (is("eof")) expect_token("punc", "}");
             if (is("keyword", "case")) {
                 if (branch) branch.end = prev();
                 cur = [];
@@ -1141,8 +1105,7 @@ function parse($TEXT, options) {
                 });
                 a.push(branch);
                 expect(":");
-            }
-            else if (is("keyword", "default")) {
+            } else if (is("keyword", "default")) {
                 if (branch) branch.end = prev();
                 cur = [];
                 branch = new AST_Default({
@@ -1150,8 +1113,7 @@ function parse($TEXT, options) {
                     body  : cur
                 });
                 a.push(branch);
-            }
-            else {
+            } else {
                 if (!cur) unexpected();
                 cur.push(statement());
             }
@@ -1288,6 +1250,7 @@ function parse($TEXT, options) {
                 var ex = expression(true);
                 var len = start.comments_before.length;
                 [].unshift.apply(ex.start.comments_before, start.comments_before);
+                start.comments_before.length = 0;
                 start.comments_before = ex.start.comments_before;
                 start.comments_before_length = len;
                 if (len == 0 && start.comments_before.length > 0) {
@@ -1303,6 +1266,7 @@ function parse($TEXT, options) {
                 var end = prev();
                 end.comments_before = ex.end.comments_before;
                 [].push.apply(ex.end.comments_after, end.comments_after);
+                end.comments_after.length = 0;
                 end.comments_after = ex.end.comments_after;
                 ex.end = end;
                 if (ex instanceof AST_Call) mark_pure(ex);
@@ -1420,10 +1384,10 @@ function parse($TEXT, options) {
     }
 
     function as_name() {
-        var tmp = S.token;
-        if (tmp.type != "name") unexpected();
+        if (!is("name")) expect_token("name");
+        var name = S.token.value;
         next();
-        return tmp.value;
+        return name;
     }
 
     function _make_symbol(type) {
@@ -1625,6 +1589,7 @@ function parse($TEXT, options) {
     }
 
     if (options.expression) {
+        handle_regexp();
         return expression(true);
     }
 

lib/scope.js

@@ -55,14 +55,13 @@ function SymbolDef(scope, orig, init) {
     this.mangled_name = null;
     this.undeclared = false;
     this.id = SymbolDef.next_id++;
+    this.lambda = orig instanceof AST_SymbolLambda;
 }
 
 SymbolDef.next_id = 1;
 
 SymbolDef.prototype = {
     unmangleable: function(options) {
-        if (!options) options = {};
-
         return this.global && !options.toplevel
             || this.undeclared
             || !options.eval && this.scope.pinned()
@@ -193,13 +192,19 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
     // pass 3: fix up any scoping issue with IE8
     if (options.ie8) self.walk(new TreeWalker(function(node) {
         if (node instanceof AST_SymbolCatch) {
-            redefine(node, node.thedef.defun);
+            var scope = node.thedef.defun;
+            if (scope.name instanceof AST_SymbolLambda && scope.name.name == node.name) {
+                scope = scope.parent_scope.resolve();
+            }
+            redefine(node, scope);
             return true;
         }
         if (node instanceof AST_SymbolLambda) {
             var def = node.thedef;
-            if (def.orig.length == 1) {
-                redefine(node, node.scope.parent_scope);
+            redefine(node, node.scope.parent_scope.resolve());
+            if (typeof node.thedef.init !== "undefined") {
+                node.thedef.init = false;
+            } else if (def.init) {
                 node.thedef.init = def.init;
             }
             return true;
@@ -208,14 +213,20 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options) {
 
     function redefine(node, scope) {
         var name = node.name;
-        var refs = node.thedef.references;
-        var def = scope.find_variable(name) || self.globals.get(name) || scope.def_variable(node);
-        refs.forEach(function(ref) {
-            ref.thedef = def;
-            ref.reference(options);
+        var old_def = node.thedef;
+        var new_def = scope.find_variable(name);
+        if (new_def) {
+            var redef;
+            while (redef = new_def.redefined()) new_def = redef;
+        } else {
+            new_def = self.globals.get(name) || scope.def_variable(node);
+        }
+        old_def.orig.concat(old_def.references).forEach(function(node) {
+            node.thedef = new_def;
+            node.reference(options);
         });
-        node.thedef = def;
-        node.reference(options);
+        if (old_def.lambda) new_def.lambda = true;
+        if (new_def.undeclared) self.variables.set(name, new_def);
     }
 });
 
@@ -287,9 +298,7 @@ AST_Scope.DEFMETHOD("def_variable", function(symbol, init) {
     var def = this.variables.get(symbol.name);
     if (def) {
         def.orig.push(symbol);
-        if (def.init && (def.scope !== symbol.scope || def.init instanceof AST_Function)) {
-            def.init = init;
-        }
+        if (def.init instanceof AST_Function) def.init = init;
     } else {
         def = new SymbolDef(this, symbol, init);
         this.variables.set(symbol.name, def);
@@ -300,7 +309,7 @@ AST_Scope.DEFMETHOD("def_variable", function(symbol, init) {
 
 AST_Lambda.DEFMETHOD("resolve", return_this);
 AST_Scope.DEFMETHOD("resolve", function() {
-    return this.parent_scope;
+    return this.parent_scope.resolve();
 });
 AST_Toplevel.DEFMETHOD("resolve", return_this);
 
@@ -309,8 +318,12 @@ function names_in_use(scope, options) {
     if (!names) {
         scope.names_in_use = names = Object.create(scope.mangled_names || null);
         scope.cname_holes = [];
+        var cache = options.cache && options.cache.props;
         scope.enclosed.forEach(function(def) {
             if (def.unmangleable(options)) names[def.name] = true;
+            if (def.global && cache && cache.has(def.name)) {
+                names[cache.get(def.name)] = true;
+            }
         });
     }
     return names;
@@ -320,14 +333,6 @@ function next_mangled_name(scope, options, def) {
     var in_use = names_in_use(scope, options);
     var holes = scope.cname_holes;
     var names = Object.create(null);
-    // #179, #326
-    // in Safari strict mode, something like (function x(x){...}) is a syntax error;
-    // a function expression's argument cannot shadow the function expression's name
-    if (scope instanceof AST_Function && scope.name && def.orig[0] instanceof AST_SymbolFunarg) {
-        var tricky_def = scope.name.definition();
-        // the function's mangled_name is null when keep_fnames is true
-        names[tricky_def.mangled_name || tricky_def.name] = true;
-    }
     var scopes = [ scope ];
     def.references.forEach(function(sym) {
         var scope = sym.scope;
@@ -341,7 +346,7 @@ function next_mangled_name(scope, options, def) {
         } while (scope = scope.parent_scope);
     });
     var name;
-    for (var i = 0, len = holes.length; i < len; i++) {
+    for (var i = 0; i < holes.length; i++) {
         name = base54(holes[i]);
         if (names[name]) continue;
         holes.splice(i, 1);
@@ -350,7 +355,7 @@ function next_mangled_name(scope, options, def) {
     }
     while (true) {
         name = base54(++scope.cname);
-        if (in_use[name] || !is_identifier(name) || options.reserved.has[name]) continue;
+        if (in_use[name] || RESERVED_WORDS[name] || options.reserved.has[name]) continue;
         if (!names[name]) break;
         holes.push(scope.cname);
     }
@@ -423,35 +428,31 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
             if (options.cache && node instanceof AST_Toplevel) {
                 node.globals.each(mangle);
             }
-            node.variables.each(mangle);
+            if (node instanceof AST_Defun && tw.has_directive("use asm")) {
+                var sym = new AST_SymbolRef(node.name);
+                sym.scope = node;
+                sym.reference(options);
+            }
+            node.variables.each(function(def) {
+                if (!defer_redef(def)) mangle(def);
+            });
             return true;
         }
         if (node instanceof AST_Label) {
             var name;
             do {
                 name = base54(++lname);
-            } while (!is_identifier(name));
+            } while (RESERVED_WORDS[name]);
             node.mangled_name = name;
             return true;
         }
         if (!options.ie8 && node instanceof AST_Catch) {
             var def = node.argname.definition();
-            var redef = def.redefined();
-            if (redef) {
-                redefined.push(def);
-                reference(node.argname);
-                def.references.forEach(reference);
-            }
+            var redef = defer_redef(def, node.argname);
             descend();
             if (!redef) mangle(def);
             return true;
         }
-
-        function reference(sym) {
-            sym.thedef = redef;
-            sym.reference(options);
-            sym.thedef = def;
-        }
     });
     this.walk(tw);
     redefined.forEach(mangle);
@@ -460,6 +461,21 @@ AST_Toplevel.DEFMETHOD("mangle_names", function(options) {
         if (options.reserved.has[def.name]) return;
         def.mangle(options);
     }
+
+    function defer_redef(def, node) {
+        var redef = def.redefined();
+        if (!redef) return false;
+        redefined.push(def);
+        def.references.forEach(reference);
+        if (node) reference(node);
+        return true;
+
+        function reference(sym) {
+            sym.thedef = redef;
+            sym.reference(options);
+            sym.thedef = def;
+        }
+    }
 });
 
 AST_Toplevel.DEFMETHOD("find_colliding_names", function(options) {
@@ -501,7 +517,7 @@ AST_Toplevel.DEFMETHOD("expand_names", function(options) {
         var name;
         do {
             name = base54(cname++);
-        } while (avoid[name] || !is_identifier(name));
+        } while (avoid[name] || RESERVED_WORDS[name]);
         return name;
     }
 
@@ -509,13 +525,14 @@ AST_Toplevel.DEFMETHOD("expand_names", function(options) {
         if (def.global && options.cache) return;
         if (def.unmangleable(options)) return;
         if (options.reserved.has[def.name]) return;
-        var d = def.redefined();
-        def.name = d ? d.name : next_name();
+        var redef = def.redefined();
+        var name = redef ? redef.rename || redef.name : next_name();
+        def.rename = name;
         def.orig.forEach(function(sym) {
-            sym.name = def.name;
+            sym.name = name;
         });
         def.references.forEach(function(sym) {
-            sym.name = def.name;
+            sym.name = name;
         });
     }
 });
@@ -563,7 +580,7 @@ var base54 = (function() {
     var freq = Object.create(null);
     function init(chars) {
         var array = [];
-        for (var i = 0, len = chars.length; i < len; i++) {
+        for (var i = 0; i < chars.length; i++) {
             var ch = chars[i];
             array.push(ch);
             freq[ch] = -1e-2 * i;

lib/transform.js

@@ -52,7 +52,7 @@ TreeTransformer.prototype = new TreeWalker;
 
 (function(DEF) {
     function do_list(list, tw) {
-        return MAP(list, function(node) {
+        return List(list, function(node) {
             return node.transform(tw, true);
         });
     }

lib/utils.js

@@ -70,7 +70,7 @@ function configure_error_stack(fn) {
             err.name = this.name;
             try {
                 throw err;
-            } catch(e) {
+            } catch (e) {
                 return e.stack;
             }
         }
@@ -113,8 +113,8 @@ function return_true() { return true; }
 function return_this() { return this; }
 function return_null() { return null; }
 
-var MAP = (function() {
-    function MAP(a, f, backwards) {
+var List = (function() {
+    function List(a, f, backwards) {
         var ret = [], top = [], i;
         function doit() {
             var val = f(a[i], i);
@@ -127,8 +127,7 @@ var MAP = (function() {
                 } else {
                     top.push(val);
                 }
-            }
-            else if (val !== skip) {
+            } else if (val !== skip) {
                 if (val instanceof Splice) {
                     ret.push.apply(ret, backwards ? val.v.slice().reverse() : val.v);
                 } else {
@@ -145,20 +144,19 @@ var MAP = (function() {
             } else {
                 for (i = 0; i < a.length; ++i) if (doit()) break;
             }
-        }
-        else {
+        } else {
             for (i in a) if (HOP(a, i)) if (doit()) break;
         }
         return top.concat(ret);
     }
-    MAP.at_top = function(val) { return new AtTop(val) };
-    MAP.splice = function(val) { return new Splice(val) };
-    MAP.last = function(val) { return new Last(val) };
-    var skip = MAP.skip = {};
-    function AtTop(val) { this.v = val }
-    function Splice(val) { this.v = val }
-    function Last(val) { this.v = val }
-    return MAP;
+    List.at_top = function(val) { return new AtTop(val); };
+    List.splice = function(val) { return new Splice(val); };
+    List.last = function(val) { return new Last(val); };
+    var skip = List.skip = {};
+    function AtTop(val) { this.v = val; }
+    function Splice(val) { this.v = val; }
+    function Last(val) { this.v = val; }
+    return List;
 })();
 
 function push_uniq(array, el) {

package.json

@@ -3,7 +3,7 @@
   "description": "JavaScript parser, mangler/compressor and beautifier toolkit",
   "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
   "license": "BSD-2-Clause",
-  "version": "3.4.6",
+  "version": "3.8.0",
   "engines": {
     "node": ">=0.8.0"
   },
@@ -23,15 +23,15 @@
     "LICENSE"
   ],
   "dependencies": {
-    "commander": "~2.16.0",
+    "commander": "~2.20.3",
     "source-map": "~0.6.1"
   },
   "devDependencies": {
-    "acorn": "~5.7.1",
-    "semver": "~5.5.0"
+    "acorn": "~7.1.0",
+    "semver": "~6.3.0"
   },
   "scripts": {
-    "test": "node test/run-tests.js"
+    "test": "node test/compress.js && node test/mocha.js"
   },
   "keywords": [
     "cli",

test/benchmark.js

@@ -13,15 +13,15 @@ if (!args.length) {
 }
 args.push("--timings");
 var urls = [
-    "https://code.jquery.com/jquery-3.2.1.js",
-    "https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.4/angular.js",
-    "https://cdnjs.cloudflare.com/ajax/libs/mathjs/3.9.0/math.js",
-    "https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.js",
+    "https://code.jquery.com/jquery-3.4.1.js",
+    "https://code.angularjs.org/1.7.8/angular.js",
+    "https://unpkg.com/mathjs@6.2.3/dist/math.js",
     "https://unpkg.com/react@15.3.2/dist/react.js",
-    "http://builds.emberjs.com/tags/v2.11.0/ember.prod.js",
-    "https://cdn.jsdelivr.net/lodash/4.17.4/lodash.js",
-    "https://cdnjs.cloudflare.com/ajax/libs/d3/4.5.0/d3.js",
-    "https://raw.githubusercontent.com/kangax/html-minifier/v3.5.7/dist/htmlminifier.js",
+    "https://cdnjs.cloudflare.com/ajax/libs/d3/5.12.0/d3.js",
+    "https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.js",
+    "https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.js",
+    "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.12.2/ember.prod.js",
+    "https://raw.githubusercontent.com/kangax/html-minifier/v4.0.0/dist/htmlminifier.js",
 ];
 var results = {};
 var remaining = 2 * urls.length;

test/compress.js

@@ -0,0 +1,454 @@
+"use strict";
+
+require("../tools/exit");
+
+var assert = require("assert");
+var child_process = require("child_process");
+var fs = require("fs");
+var path = require("path");
+var sandbox = require("./sandbox");
+var semver = require("semver");
+var U = require("./node");
+
+var file = process.argv[2];
+var dir = path.resolve(path.dirname(module.filename), "compress");
+if (file) {
+    var minify_options = require("./ufuzz/options.json").map(JSON.stringify);
+    log("--- {file}", { file: file });
+    var tests = parse_test(path.resolve(dir, file));
+    process.exit(Object.keys(tests).filter(function(name) {
+        return !test_case(tests[name]);
+    }).length);
+} else {
+    var files = fs.readdirSync(dir).filter(function(name) {
+        return /\.js$/i.test(name);
+    });
+    var failures = 0;
+    var failed_files = Object.create(null);
+    (function next() {
+        var file = files.shift();
+        if (file) {
+            child_process.spawn(process.argv[0], [ process.argv[1], file ], {
+                stdio: [ "ignore", 1, 2 ]
+            }).on("exit", function(code) {
+                if (code) {
+                    failures += code;
+                    failed_files[file] = code;
+                }
+                next();
+            });
+        } else if (failures) {
+            console.error();
+            console.error("!!! Failed " + failures + " test case(s).");
+            console.error("!!! " + Object.keys(failed_files).join(", "));
+            process.exit(1);
+        }
+    })();
+}
+
+function evaluate(code) {
+    if (code instanceof U.AST_Node) code = make_code(code, { beautify: true });
+    return new Function("return(" + code + ")")();
+}
+
+function log() {
+    console.log("%s", tmpl.apply(null, arguments));
+}
+
+function make_code(ast, options) {
+    var stream = U.OutputStream(options);
+    ast.print(stream);
+    return stream.get();
+}
+
+function parse_test(file) {
+    var script = fs.readFileSync(file, "utf8");
+    // TODO try/catch can be removed after fixing https://github.com/mishoo/UglifyJS2/issues/348
+    try {
+        var ast = U.parse(script, {
+            filename: file
+        });
+    } catch (e) {
+        console.error("Caught error while parsing tests in " + file);
+        console.error(e);
+        process.exit(1);
+    }
+    var tests = Object.create(null);
+    var tw = new U.TreeWalker(function(node, descend) {
+        if (node instanceof U.AST_LabeledStatement
+            && tw.parent() instanceof U.AST_Toplevel) {
+            var name = node.label.name;
+            if (name in tests) {
+                throw new Error('Duplicated test name "' + name + '" in ' + file);
+            }
+            tests[name] = get_one_test(name, node.body);
+            return true;
+        }
+        if (!(node instanceof U.AST_Toplevel)) croak(node);
+    });
+    ast.walk(tw);
+    return tests;
+
+    function croak(node) {
+        throw new Error(tmpl("Can't understand test file {file} [{line},{col}]\n{code}", {
+            file: file,
+            line: node.start.line,
+            col: node.start.col,
+            code: make_code(node, { beautify: false })
+        }));
+    }
+
+    function read_string(stat) {
+        if (stat.TYPE == "SimpleStatement") {
+            var body = stat.body;
+            switch(body.TYPE) {
+              case "String":
+                return body.value;
+              case "Array":
+                return body.elements.map(function(element) {
+                    if (element.TYPE !== "String")
+                        throw new Error("Should be array of strings");
+                    return element.value;
+                }).join("\n");
+            }
+        }
+        throw new Error("Should be string or array of strings");
+    }
+
+    function get_one_test(name, block) {
+        var test = { name: name, options: {} };
+        var tw = new U.TreeWalker(function(node, descend) {
+            if (node instanceof U.AST_Assign) {
+                if (!(node.left instanceof U.AST_SymbolRef)) {
+                    croak(node);
+                }
+                var name = node.left.name;
+                test[name] = evaluate(node.right);
+                return true;
+            }
+            if (node instanceof U.AST_LabeledStatement) {
+                var label = node.label;
+                assert.ok([
+                    "input",
+                    "expect",
+                    "expect_exact",
+                    "expect_warnings",
+                    "expect_stdout",
+                    "node_version",
+                ].indexOf(label.name) >= 0, tmpl("Unsupported label {name} [{line},{col}]", {
+                    name: label.name,
+                    line: label.start.line,
+                    col: label.start.col
+                }));
+                var stat = node.body;
+                if (label.name == "expect_exact" || label.name == "node_version") {
+                    test[label.name] = read_string(stat);
+                } else if (label.name == "expect_stdout") {
+                    var body = stat.body;
+                    if (body instanceof U.AST_Boolean) {
+                        test[label.name] = body.value;
+                    } else if (body instanceof U.AST_Call) {
+                        var ctor = global[body.expression.name];
+                        assert.ok(ctor === Error || ctor.prototype instanceof Error, tmpl("Unsupported expect_stdout format [{line},{col}]", {
+                            line: label.start.line,
+                            col: label.start.col
+                        }));
+                        test[label.name] = ctor.apply(null, body.args.map(function(node) {
+                            assert.ok(node instanceof U.AST_Constant, tmpl("Unsupported expect_stdout format [{line},{col}]", {
+                                line: label.start.line,
+                                col: label.start.col
+                            }));
+                            return node.value;
+                        }));
+                    } else {
+                        test[label.name] = read_string(stat) + "\n";
+                    }
+                } else {
+                    test[label.name] = stat;
+                }
+                return true;
+            }
+        });
+        block.walk(tw);
+        return test;
+    }
+}
+
+// Try to reminify original input with standard options
+// to see if it matches expect_stdout.
+function reminify(orig_options, input_code, input_formatted, stdout) {
+    for (var i = 0; i < minify_options.length; i++) {
+        var options = JSON.parse(minify_options[i]);
+        if (options.compress) [
+            "keep_fargs",
+            "keep_fnames",
+        ].forEach(function(name) {
+            if (name in orig_options) {
+                options.compress[name] = orig_options[name];
+            }
+        });
+        var options_formatted = JSON.stringify(options, null, 4);
+        var result = U.minify(input_code, options);
+        if (result.error) {
+            log([
+                "!!! failed input reminify",
+                "---INPUT---",
+                "{input}",
+                "---OPTIONS---",
+                "{options}",
+                "--ERROR---",
+                "{error}",
+                "",
+                "",
+            ].join("\n"), {
+                input: input_formatted,
+                options: options_formatted,
+                error: result.error,
+            });
+            return false;
+        } else {
+            var expected = stdout[options.toplevel ? 1 : 0];
+            var actual = run_code(result.code, options.toplevel);
+            if (typeof expected != "string" && typeof actual != "string" && expected.name == actual.name) {
+                actual = expected;
+            }
+            if (!sandbox.same_stdout(expected, actual)) {
+                log([
+                    "!!! failed running reminified input",
+                    "---INPUT---",
+                    "{input}",
+                    "---OPTIONS---",
+                    "{options}",
+                    "---OUTPUT---",
+                    "{output}",
+                    "---EXPECTED {expected_type}---",
+                    "{expected}",
+                    "---ACTUAL {actual_type}---",
+                    "{actual}",
+                    "",
+                    "",
+                ].join("\n"), {
+                    input: input_formatted,
+                    options: options_formatted,
+                    output: result.code,
+                    expected_type: typeof expected == "string" ? "STDOUT" : "ERROR",
+                    expected: expected,
+                    actual_type: typeof actual == "string" ? "STDOUT" : "ERROR",
+                    actual: actual,
+                });
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+function run_code(code, toplevel) {
+    var result = sandbox.run_code(code, toplevel);
+    return typeof result == "string" ? result.replace(/\u001b\[\d+m/g, "") : result;
+}
+
+function test_case(test) {
+    log("    Running test [{name}]", { name: test.name });
+    var output_options = test.beautify || {};
+    var expect;
+    if (test.expect) {
+        expect = make_code(to_toplevel(test.expect, test.mangle), output_options);
+    } else {
+        expect = test.expect_exact;
+    }
+    var input = to_toplevel(test.input, test.mangle);
+    var input_code = make_code(input);
+    var input_formatted = make_code(test.input, {
+        beautify: true,
+        comments: "all",
+        keep_quoted_props: true,
+        quote_style: 3,
+    });
+    try {
+        U.parse(input_code);
+    } catch (ex) {
+        log([
+            "!!! Cannot parse input",
+            "---INPUT---",
+            "{input}",
+            "--PARSE ERROR--",
+            "{error}",
+            "",
+            "",
+        ].join("\n"), {
+            input: input_formatted,
+            error: ex,
+        });
+        return false;
+    }
+    var warnings_emitted = [];
+    if (test.expect_warnings) {
+        var expected_warnings = make_code(test.expect_warnings, {
+            beautify: false,
+            quote_style: 2, // force double quote to match JSON
+        });
+        U.AST_Node.log_function(function(text) {
+            warnings_emitted.push(text);
+        }, /"INFO: /.test(expected_warnings));
+    }
+    if (test.mangle && test.mangle.properties && test.mangle.properties.keep_quoted) {
+        var quoted_props = test.mangle.properties.reserved;
+        if (!Array.isArray(quoted_props)) quoted_props = [];
+        test.mangle.properties.reserved = quoted_props;
+        U.reserve_quoted_keys(input, quoted_props);
+    }
+    if (test.rename) {
+        input.figure_out_scope(test.mangle);
+        input.expand_names(test.mangle);
+    }
+    var cmp = new U.Compressor(test.options, true);
+    var output = cmp.compress(input);
+    output.figure_out_scope(test.mangle);
+    if (test.mangle) {
+        output.compute_char_frequency(test.mangle);
+        output.mangle_names(test.mangle);
+        if (test.mangle.properties) {
+            output = U.mangle_properties(output, test.mangle.properties);
+        }
+    }
+    output = make_code(output, output_options);
+    if (expect != output) {
+        log([
+            "!!! failed",
+            "---INPUT---",
+            "{input}",
+            "---OUTPUT---",
+            "{output}",
+            "---EXPECTED---",
+            "{expected}",
+            "",
+            "",
+        ].join("\n"), {
+            input: input_formatted,
+            output: output,
+            expected: expect
+        });
+        return false;
+    }
+    // expect == output
+    try {
+        U.parse(output);
+    } catch (ex) {
+        log([
+            "!!! Test matched expected result but cannot parse output",
+            "---INPUT---",
+            "{input}",
+            "---OUTPUT---",
+            "{output}",
+            "--REPARSE ERROR--",
+            "{error}",
+            "",
+            "",
+        ].join("\n"), {
+            input: input_formatted,
+            output: output,
+            error: ex,
+        });
+        return false;
+    }
+    if (test.expect_warnings) {
+        warnings_emitted = warnings_emitted.map(function(input) {
+            return input.split(process.cwd() + path.sep).join("").split(path.sep).join("/");
+        });
+        var actual_warnings = JSON.stringify(warnings_emitted);
+        if (expected_warnings != actual_warnings) {
+            log([
+                "!!! failed",
+                "---INPUT---",
+                "{input}",
+                "---EXPECTED WARNINGS---",
+                "{expected_warnings}",
+                "---ACTUAL WARNINGS---",
+                "{actual_warnings}",
+                "",
+                "",
+            ].join("\n"), {
+                input: input_formatted,
+                expected_warnings: expected_warnings,
+                actual_warnings: actual_warnings,
+            });
+            return false;
+        }
+    }
+    if (test.expect_stdout && (!test.node_version || semver.satisfies(process.version, test.node_version))) {
+        var stdout = [ run_code(input_code), run_code(input_code, true) ];
+        var toplevel = test.options.toplevel;
+        var actual = stdout[toplevel ? 1 : 0];
+        if (test.expect_stdout === true) {
+            test.expect_stdout = actual;
+        }
+        if (!sandbox.same_stdout(test.expect_stdout, actual)) {
+            log([
+                "!!! Invalid input or expected stdout",
+                "---INPUT---",
+                "{input}",
+                "---EXPECTED {expected_type}---",
+                "{expected}",
+                "---ACTUAL {actual_type}---",
+                "{actual}",
+                "",
+                "",
+            ].join("\n"), {
+                input: input_formatted,
+                expected_type: typeof test.expect_stdout == "string" ? "STDOUT" : "ERROR",
+                expected: test.expect_stdout,
+                actual_type: typeof actual == "string" ? "STDOUT" : "ERROR",
+                actual: actual,
+            });
+            return false;
+        }
+        actual = run_code(output, toplevel);
+        if (!sandbox.same_stdout(test.expect_stdout, actual)) {
+            log([
+                "!!! failed",
+                "---INPUT---",
+                "{input}",
+                "---EXPECTED {expected_type}---",
+                "{expected}",
+                "---ACTUAL {actual_type}---",
+                "{actual}",
+                "",
+                "",
+            ].join("\n"), {
+                input: input_formatted,
+                expected_type: typeof test.expect_stdout == "string" ? "STDOUT" : "ERROR",
+                expected: test.expect_stdout,
+                actual_type: typeof actual == "string" ? "STDOUT" : "ERROR",
+                actual: actual,
+            });
+            return false;
+        }
+        if (!reminify(test.options, input_code, input_formatted, stdout)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+function tmpl() {
+    return U.string_template.apply(null, arguments);
+}
+
+function to_toplevel(input, mangle_options) {
+    if (!(input instanceof U.AST_BlockStatement)) throw new Error("Unsupported input syntax");
+    var directive = true;
+    var offset = input.start.line;
+    var tokens = [];
+    var toplevel = new U.AST_Toplevel(input.transform(new U.TreeTransformer(function(node) {
+        if (U.push_uniq(tokens, node.start)) node.start.line -= offset;
+        if (!directive || node === input) return;
+        if (node instanceof U.AST_SimpleStatement && node.body instanceof U.AST_String) {
+            return new U.AST_Directive(node.body);
+        } else {
+            directive = false;
+        }
+    })));
+    toplevel.figure_out_scope(mangle_options);
+    return toplevel;
+}

test/compress/arguments.js

@@ -237,3 +237,542 @@ duplicate_argname: {
     }
     expect_stdout: "bar 42 foo 42 bar"
 }
+
+issue_3273: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            console.log(a, a);
+            a++;
+            console.log(a, a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 1",
+    ]
+}
+
+issue_3273_reduce_vars: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            console.log(a, a);
+            a++;
+            console.log(a, a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 1",
+    ]
+}
+
+issue_3273_local_strict: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_local_strict_reduce_vars: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        function f(a) {
+            "use strict";
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_global_strict: {
+    options = {
+        arguments: true,
+    }
+    input: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_global_strict_reduce_vars: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+    }
+    input: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect: {
+        "use strict";
+        function f(a) {
+            console.log(arguments[0], a);
+            arguments[0]++;
+            console.log(arguments[0], a);
+        }
+        f(0);
+    }
+    expect_stdout: [
+        "0 0",
+        "1 0",
+    ]
+}
+
+issue_3273_keep_fargs_false: {
+    options = {
+        arguments: true,
+        keep_fargs: false,
+        reduce_vars: true,
+    }
+    input: {
+        (function() {
+            "use strict";
+            arguments[0]++;
+            console.log(arguments[0]);
+        })(0);
+    }
+    expect: {
+        (function(argument_0) {
+            "use strict";
+            argument_0++;
+            console.log(argument_0);
+        })(0);
+    }
+    expect_stdout: "1"
+}
+
+issue_3273_keep_fargs_strict: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+        reduce_vars: true,
+    }
+    input: {
+        (function() {
+            "use strict";
+            arguments[0]++;
+            console.log(arguments[0]);
+        })(0);
+    }
+    expect: {
+        (function(argument_0) {
+            "use strict";
+            argument_0++;
+            console.log(argument_0);
+        })(0);
+    }
+    expect_stdout: "1"
+}
+
+issue_3282_1: {
+    options = {
+        arguments: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(t) {
+            return function() {
+                t();
+            };
+        })(function() {
+            'use strict';
+            function e() {
+                return arguments[0];
+            }
+            e();
+            e();
+        })();
+    }
+    expect: {
+        (function() {
+            return function() {
+                (function() {
+                    "use strict";
+                    function e() {
+                        return arguments[0];
+                    }
+                    e();
+                    e();
+                })();
+            };
+        })()();
+    }
+    expect_stdout: true
+}
+
+issue_3282_1_passes: {
+    options = {
+        arguments: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(t) {
+            return function() {
+                t();
+            };
+        })(function() {
+            'use strict';
+            function e() {
+                return arguments[0];
+            }
+            e();
+            e();
+        })();
+    }
+    expect: {
+        (function() {
+            return function() {
+                (function() {
+                    "use strict";
+                    function e(argument_0) {
+                        return argument_0;
+                    }
+                    e();
+                    e();
+                })();
+            };
+        })()();
+    }
+    expect_stdout: true
+}
+
+issue_3282_2: {
+    options = {
+        arguments: true,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(f) {
+            f();
+        })(function() {
+            return (function(t) {
+                return function() {
+                    t();
+                };
+            })(function() {
+                'use strict';
+                function e() {
+                    return arguments[0];
+                }
+                e();
+                e();
+            })();
+        });
+    }
+    expect: {
+        (function() {
+            (function() {
+                return function(t) {
+                    return function() {
+                        t();
+                    };
+                }(function() {
+                    "use strict";
+                    function e() {
+                        return arguments[0];
+                    }
+                    e();
+                    e();
+                })();
+            })();
+        })();
+    }
+    expect_stdout: true
+}
+
+issue_3282_2_passes: {
+    options = {
+        arguments: true,
+        passes: 2,
+        reduce_vars: true,
+        keep_fargs: false,
+        unused: true,
+    }
+    input: {
+        (function(f) {
+            f();
+        })(function() {
+            return (function(t) {
+                return function() {
+                    t();
+                };
+            })(function() {
+                'use strict';
+                function e() {
+                    return arguments[0];
+                }
+                e();
+                e();
+            })();
+        });
+    }
+    expect: {
+        (function() {
+            (function() {
+                return function(t) {
+                    return function() {
+                        t();
+                    };
+                }(function() {
+                    "use strict";
+                    function e(argument_0) {
+                        return argument_0;
+                    }
+                    e();
+                    e();
+                })();
+            })();
+        })();
+    }
+    expect_stdout: true
+}
+
+issue_3420_1: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        console.log(function() {
+            return function() {
+                return arguments[0];
+            };
+        }().length);
+    }
+    expect: {
+        console.log(function() {
+            return function() {
+                return arguments[0];
+            };
+        }().length);
+    }
+    expect_stdout: "0"
+}
+
+issue_3420_2: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        var foo = function() {
+            delete arguments[0];
+        };
+        foo();
+    }
+    expect: {
+        var foo = function() {
+            delete arguments[0];
+        };
+        foo();
+    }
+    expect_stdout: true
+}
+
+issue_3420_3: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        "use strict";
+        var foo = function() {
+            delete arguments[0];
+        };
+        foo();
+    }
+    expect: {
+        "use strict";
+        var foo = function() {
+            delete arguments[0];
+        };
+        foo();
+    }
+    expect_stdout: true
+}
+
+issue_3420_4: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        !function() {
+            console.log(arguments[0]);
+            delete arguments[0];
+            console.log(arguments[0]);
+        }(42);
+    }
+    expect: {
+        !function(argument_0) {
+            console.log(argument_0);
+            delete arguments[0];
+            console.log(arguments[0]);
+        }(42);
+    }
+    expect_stdout: [
+        "42",
+        "undefined",
+    ]
+}
+
+issue_3420_5: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        "use strict";
+        !function() {
+            console.log(arguments[0]);
+            delete arguments[0];
+            console.log(arguments[0]);
+        }(42);
+    }
+    expect: {
+        "use strict";
+        !function(argument_0) {
+            console.log(argument_0);
+            delete arguments[0];
+            console.log(arguments[0]);
+        }(42);
+    }
+    expect_stdout: [
+        "42",
+        "undefined",
+    ]
+}
+
+issue_3420_6: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        console.log(function() {
+            return delete arguments[0];
+        }());
+    }
+    expect: {
+        console.log(function() {
+            return delete arguments[0];
+        }());
+    }
+    expect_stdout: "true"
+}
+
+issue_3420_7: {
+    options = {
+        arguments: true,
+        keep_fargs: "strict",
+    }
+    input: {
+        "use strict";
+        console.log(function() {
+            return delete arguments[0];
+        }());
+    }
+    expect: {
+        "use strict";
+        console.log(function() {
+            return delete arguments[0];
+        }());
+    }
+    expect_stdout: "true"
+}

test/compress/arrays.js

@@ -16,6 +16,7 @@ holes_and_undefined: {
 constant_join: {
     options = {
         evaluate: true,
+        strings: true,
         unsafe: true,
     }
     input: {
@@ -65,6 +66,7 @@ constant_join: {
 constant_join_2: {
     options = {
         evaluate: true,
+        strings: true,
         unsafe: true,
     }
     input: {
@@ -94,9 +96,11 @@ constant_join_2: {
 constant_join_3: {
     options = {
         evaluate: true,
+        strings: true,
         unsafe: true,
     }
     input: {
+        var foo, bar, baz;
         var a = [ null ].join();
         var b = [ , ].join();
         var c = [ , 1, , 3 ].join();
@@ -111,6 +115,7 @@ constant_join_3: {
         var l = [ foo, bar + "baz" ].join("");
     }
     expect: {
+        var foo, bar, baz;
         var a = "";
         var b = "";
         var c = ",1,,3";
@@ -239,3 +244,113 @@ index_length: {
     }
     expect_stdout: "1 2"
 }
+
+constructor_bad: {
+    options = {
+        unsafe: true
+    }
+    input: {
+        try {
+            Array(NaN);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                new Array(NaN);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+        try {
+            Array(3.14);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                new Array(3.14);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+    }
+    expect: {
+        try {
+            Array(NaN);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                Array(NaN);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+        try {
+            Array(3.14);
+            console.log("FAIL1");
+        } catch (ex) {
+            try {
+                Array(3.14);
+                console.log("FAIL2");
+            } catch (ex) {
+                console.log("PASS");
+            }
+        }
+    }
+    expect_stdout: [
+        "PASS",
+        "PASS",
+    ]
+    expect_warnings: [
+        "WARN: Invalid array length: 3.14 [test/compress/arrays.js:13,12]",
+        "WARN: Invalid array length: 3.14 [test/compress/arrays.js:17,16]",
+    ]
+}
+
+constructor_good: {
+    options = {
+        unsafe: true
+    }
+    input: {
+        console.log(Array());
+        console.log(Array(0));
+        console.log(Array(1));
+        console.log(Array(6));
+        console.log(Array(7));
+        console.log(Array(1, 2));
+        console.log(Array(false));
+        console.log(Array("foo"));
+        console.log(Array(Array));
+        console.log(new Array());
+        console.log(new Array(0));
+        console.log(new Array(1));
+        console.log(new Array(6));
+        console.log(new Array(7));
+        console.log(new Array(1, 2));
+        console.log(new Array(false));
+        console.log(new Array("foo"));
+        console.log(new Array(Array));
+    }
+    expect: {
+        console.log([]);
+        console.log([]);
+        console.log([,]);
+        console.log([,,,,,,]);
+        console.log(Array(7));
+        console.log([ 1, 2 ]);
+        console.log([ false ]);
+        console.log([ "foo" ]);
+        console.log(Array(Array));
+        console.log([]);
+        console.log([]);
+        console.log([,]);
+        console.log([,,,,,,]);
+        console.log(Array(7));
+        console.log([ 1, 2 ]);
+        console.log([ false ]);
+        console.log([ "foo" ]);
+        console.log(Array(Array));
+    }
+    expect_stdout: true
+    expect_warnings: []
+}

test/compress/asm.js

@@ -1,5 +1,6 @@
 asm_mixed: {
     options = {
+        assignments: true,
         booleans: true,
         comparisons: true,
         conditionals: true,
@@ -95,7 +96,7 @@ asm_mixed: {
                 return +sum;
             }
             function geometricMean(start, end) {
-                return start |= 0, end |= 0, +exp(+logSum(start, end) / +(end - start | 0));
+                return start |= 0, end |= 0, +exp(logSum(start, end) / (end - start | 0));
             }
             var exp = stdlib.Math.exp, log = stdlib.Math.log, values = new stdlib.Float64Array(buffer);
             return { geometricMean: geometricMean };
@@ -165,3 +166,69 @@ asm_nested_functions: {
     }
     expect_exact: '0;function a(){"use asm";0.0}0;function b(){0;function c(){"use asm";0.0}0;function d(){0}0}0;'
 }
+
+issue_3636_1: {
+    mangle = {}
+    input: {
+        function n(stdlib, foreign, buffer) {
+            "use asm";
+            function add(x, y) {
+                x = x | 0;
+                y = y | 0;
+                return x + y | 0;
+            }
+            return {
+                add: add
+            };
+        }
+        console.log(new n().add("foo", 42));
+    }
+    expect: {
+        function n(o, e, u) {
+            "use asm";
+            function d(n, o) {
+                n = n | 0;
+                o = o | 0;
+                return n + o | 0;
+            }
+            return {
+                add: d
+            };
+        }
+        console.log(new n().add("foo", 42));
+    }
+    expect_stdout: "42"
+}
+
+issue_3636_2: {
+    mangle = {}
+    input: {
+        var n = function(stdlib, foreign, buffer) {
+            "use asm";
+            function add(x, y) {
+                x = x | 0;
+                y = y | 0;
+                return x + y | 0;
+            }
+            return {
+                add: add
+            };
+        };
+        console.log(new n().add("foo", 42));
+    }
+    expect: {
+        var n = function(n, o, e) {
+            "use asm";
+            function r(n, o) {
+                n = n | 0;
+                o = o | 0;
+                return n + o | 0;
+            }
+            return {
+                add: r
+            };
+        };
+        console.log(new n().add("foo", 42));
+    }
+    expect_stdout: "42"
+}

test/compress/assignment.js

@@ -1,5 +1,6 @@
 op_equals_left_local_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -60,6 +61,7 @@ op_equals_left_local_var: {
 
 op_equals_right_local_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -123,6 +125,7 @@ op_equals_right_local_var: {
 }
 op_equals_left_global_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -179,6 +182,7 @@ op_equals_left_global_var: {
 
 op_equals_right_global_var: {
     options = {
+        assignments: true,
         evaluate: true,
     }
     input: {
@@ -236,3 +240,170 @@ op_equals_right_global_var: {
         x = g() &   x;
     }
 }
+
+increment_decrement_1: {
+    options = {
+        assignments: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a) {
+            a += 1;
+            a -= 1;
+            return a;
+        }(42));
+    }
+    expect: {
+        console.log(function(a){
+            ++a;
+            --a;
+            return a;
+        }(42));
+    }
+    expect_stdout: "42"
+}
+
+increment_decrement_2: {
+    options = {
+        assignments: true,
+        passes: 2,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a) {
+            a = a + 1;
+            a = a - 1;
+            a += 1;
+            a -= 1;
+            return a;
+        }(42));
+    }
+    expect: {
+        console.log(function(a){
+            ++a;
+            --a;
+            ++a;
+            --a;
+            return a;
+        }(42));
+    }
+    expect_stdout: "42"
+}
+
+issue_3375_1: {
+    options = {
+        assignments: true,
+        reduce_vars: true,
+    }
+    input: {
+        function p(o) {
+            console.log(typeof o, o);
+        }
+        p(function(b) {
+            var a = b += 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect: {
+        function p(o) {
+            console.log(typeof o, o);
+        }
+        p(function(b) {
+            var a = b += 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect_stdout: "string object1"
+}
+
+issue_3375_2: {
+    options = {
+        assignments: true,
+        reduce_vars: true,
+    }
+    input: {
+        function p(o) {
+            console.log(typeof o, o);
+        }
+        p(function(b) {
+            var a = b -= 1;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect: {
+        function p(o) {
+            console.log(typeof o, o);
+        }
+        p(function(b) {
+            var a = --b;
+            --b;
+            return a;
+        }("object"));
+    }
+    expect_stdout: "number NaN"
+}
+
+issue_3427: {
+    options = {
+        assignments: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            a || (a = {});
+        })();
+    }
+    expect: {}
+}
+
+issue_3429_1: {
+    options = {
+        assignments: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a = "PASS";
+        (function(b) {
+            b && (b = a = "FAIL");
+        })();
+        console.log(a);
+    }
+    expect: {
+        var a = "PASS";
+        (function(b) {
+            b = b && (a = "FAIL");
+        })();
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3429_2: {
+    options = {
+        assignments: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        (function(b) {
+            b || (b = a = "FAIL");
+        })(42);
+        console.log(a);
+    }
+    expect: {
+        var a;
+        (function(b) {
+            b = b || (a = "FAIL");
+        })(42);
+        console.log(a);
+    }
+    expect_stdout: "undefined"
+}

test/compress/booleans.js

@@ -0,0 +1,155 @@
+iife_boolean_context: {
+    options = {
+        booleans: true,
+        evaluate: true,
+    }
+    input: {
+        console.log(function() {
+            return Object(1) || false;
+        }() ? "PASS" : "FAIL");
+        console.log(function() {
+            return [].length || true;
+        }() ? "PASS" : "FAIL");
+    }
+    expect: {
+        console.log(function() {
+            return Object(1);
+        }() ? "PASS" : "FAIL");
+        console.log(function() {
+            return [].length, 1;
+        }() ? "PASS" : "FAIL");
+    }
+    expect_stdout: [
+        "PASS",
+        "PASS",
+    ]
+    expect_warnings: [
+        "WARN: Dropping side-effect-free || [test/compress/booleans.js:2,19]",
+        "WARN: Boolean || always true [test/compress/booleans.js:5,19]",
+    ]
+}
+
+issue_3465_1: {
+    options = {
+        booleans: true,
+    }
+    input: {
+        console.log(function(a) {
+            return typeof a;
+        }() ? "PASS" : "FAIL");
+    }
+    expect: {
+        console.log(function(a) {
+            return 1;
+        }() ? "PASS" : "FAIL");
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3465_2: {
+    options = {
+        booleans: true,
+    }
+    input: {
+        console.log(function f(a) {
+            if (!a) console.log(f(42));
+            return typeof a;
+        }() ? "PASS" : "FAIL");
+    }
+    expect: {
+        console.log(function f(a) {
+            if (!a) console.log(f(42));
+            return typeof a;
+        }() ? "PASS" : "FAIL");
+    }
+    expect_stdout: [
+        "number",
+        "PASS",
+    ]
+}
+
+issue_3465_3: {
+    options = {
+        booleans: true,
+        passes: 2,
+        unused: true,
+    }
+    input: {
+        console.log(function f(a) {
+            return typeof a;
+        }() ? "PASS" : "FAIL");
+    }
+    expect: {
+        console.log(function(a) {
+            return 1;
+        }() ? "PASS" : "FAIL");
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2737_2: {
+    options = {
+        booleans: true,
+        inline: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function(bar) {
+            for (;bar();) break;
+        })(function qux() {
+            return console.log("PASS"), qux;
+        });
+    }
+    expect: {
+        (function(bar) {
+            for (;bar();) break;
+        })(function() {
+            return console.log("PASS"), 1;
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3658: {
+    options = {
+        booleans: true,
+        evaluate: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function f() {
+            console || f();
+            return "PASS";
+        }());
+    }
+    expect: {
+        console.log(function f() {
+            console || f();
+            return "PASS";
+        }());
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3690: {
+    options = {
+        booleans: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            return function() {
+                return a = [ this ];
+            }() ? "PASS" : "FAIL";
+        }());
+    }
+    expect: {
+        console.log(function(a) {
+            return function() {
+                return 1;
+            }() ? "PASS" : "FAIL";
+        }());
+    }
+    expect_stdout: "PASS"
+}

test/compress/comparisons.js

@@ -33,10 +33,10 @@ unsafe_comps: {
     }
     expect: {
         var obj1, obj2;
-        obj2 <  obj1 ? g1() : f1();
-        obj1 <  obj2 ? f2() : g2();
-        obj1 <  obj2 ? g3() : f3();
-        obj2 <  obj1 ? f4() : g4();
+        (obj2 <  obj1 ? g1 : f1)();
+        (obj1 <  obj2 ? f2 : g2)();
+        (obj1 <  obj2 ? g3 : f3)();
+        (obj2 <  obj1 ? f4 : g4)();
     }
 }
 
@@ -323,3 +323,120 @@ is_number_unsafe: {
     }
     expect_stdout: "true"
 }
+
+is_boolean_var: {
+    options = {
+        comparisons: true,
+        reduce_vars: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            for (var i = 0, c = !b; i < a.length; i++)
+                if (!a[i] === c)
+                    return i;
+        }([ false, true ], 42));
+    }
+    expect: {
+        console.log(function(a, b) {
+            for (var i = 0, c = !b; i < a.length; i++)
+                if (!a[i] == c)
+                    return i;
+        }([ false, true ], 42));
+    }
+    expect_stdout: "1"
+}
+
+is_defined: {
+    options = {
+        comparisons: true,
+    }
+    input: {
+        console.log(function a() {
+            return void 0 === a;
+        }());
+    }
+    expect: {
+        console.log(function a() {
+            return a, false;
+        }());
+    }
+    expect_stdout: "false"
+    expect_warnings: [
+        "WARN: Expression always defined [test/compress/comparisons.js:2,19]",
+    ]
+}
+
+unsafe_indexOf: {
+    options = {
+        booleans: true,
+        comparisons: true,
+        unsafe: true,
+    }
+    input: {
+        var a = Object.keys({ foo: 42 });
+        if (a.indexOf("bar") < 0) console.log("PASS");
+        if (0 > a.indexOf("bar")) console.log("PASS");
+        if (a.indexOf("foo") >= 0) console.log("PASS");
+        if (0 <= a.indexOf("foo")) console.log("PASS");
+        if (a.indexOf("foo") > -1) console.log("PASS");
+        if (-1 < a.indexOf("foo")) console.log("PASS");
+        if (a.indexOf("bar") == -1) console.log("PASS");
+        if (-1 == a.indexOf("bar")) console.log("PASS");
+        if (a.indexOf("bar") === -1) console.log("PASS");
+        if (-1 === a.indexOf("bar")) console.log("PASS");
+        if (a.indexOf("foo") != -1) console.log("PASS");
+        if (-1 != a.indexOf("foo")) console.log("PASS");
+        if (a.indexOf("foo") !== -1) console.log("PASS");
+        if (-1 !== a.indexOf("foo")) console.log("PASS");
+    }
+    expect: {
+        var a = Object.keys({ foo: 42 });
+        if (!~a.indexOf("bar")) console.log("PASS");
+        if (!~a.indexOf("bar")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (!~a.indexOf("bar")) console.log("PASS");
+        if (!~a.indexOf("bar")) console.log("PASS");
+        if (!~a.indexOf("bar")) console.log("PASS");
+        if (!~a.indexOf("bar")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+        if (~a.indexOf("foo")) console.log("PASS");
+    }
+    expect_stdout: [
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+        "PASS",
+    ]
+}
+
+issue_3413: {
+    options = {
+        comparisons: true,
+        evaluate: true,
+        side_effects: true,
+    }
+    input: {
+        var b;
+        void 0 !== ("" < b || void 0) || console.log("PASS");
+    }
+    expect: {
+        var b;
+        void 0 !== ("" < b || void 0) || console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}

test/compress/concat-strings.js

@@ -26,7 +26,9 @@ concat_1: {
 }
 
 concat_2: {
-    options = {}
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             1 + (2 + 3),
@@ -55,7 +57,9 @@ concat_2: {
 }
 
 concat_3: {
-    options = {}
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             1 + 2 + (3 + 4 + 5),
@@ -84,7 +88,9 @@ concat_3: {
 }
 
 concat_4: {
-    options = {}
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             1 + "2" + (3 + 4 + 5),
@@ -113,7 +119,9 @@ concat_4: {
 }
 
 concat_5: {
-    options = {}
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             "1" + 2 + (3 + 4 + 5),
@@ -142,7 +150,9 @@ concat_5: {
 }
 
 concat_6: {
-    options = {}
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             "1" + "2" + (3 + 4 + 5),
@@ -171,6 +181,9 @@ concat_6: {
 }
 
 concat_7: {
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             "" + 1,
@@ -197,6 +210,9 @@ concat_7: {
 }
 
 concat_8: {
+    options = {
+        strings: true,
+    }
     input: {
         console.log(
             1 + "",
@@ -221,3 +237,20 @@ concat_8: {
     }
     expect_stdout: true
 }
+
+issue_3689: {
+    options = {
+        strings: true,
+    }
+    input: {
+        console.log(function(a) {
+            return a + ("" + (a[0] = 0));
+        }([]));
+    }
+    expect: {
+        console.log(function(a) {
+            return a + ("" + (a[0] = 0));
+        }([]));
+    }
+    expect_stdout: "00"
+}

test/compress/conditionals.js

@@ -41,7 +41,7 @@ ifs_2: {
     }
     expect: {
         foo ? x() : bar ? y() : baz && z();
-        foo ? x() : bar ? y() : baz ? z() : t();
+        (foo ? x : bar ? y : baz ? z : t)();
     }
 }
 
@@ -161,6 +161,24 @@ ifs_6: {
     }
 }
 
+ifs_7: {
+    options = {
+        conditionals: true,
+    }
+    input: {
+        if (A); else;
+        if (A) while (B); else;
+        if (A); else while (C);
+        if (A) while (B); else while (C);
+    }
+    expect: {
+        A;
+        if (A) while (B);
+        if (!A) while (C);
+        if (A) while (B); else while (C);
+    }
+}
+
 cond_1: {
     options = {
         conditionals: true,
@@ -271,11 +289,50 @@ cond_5: {
         }
     }
     expect: {
-        some_condition() && some_other_condition() ? do_something() : alternate();
+        (some_condition() && some_other_condition() ? do_something : alternate)();
         some_condition() && some_other_condition() && do_something();
     }
 }
 
+cond_6: {
+    options = {
+        booleans: true,
+        conditionals: true,
+    }
+    input: {
+        x ? a : b;
+        x ? a : a;
+
+        x ? y ? a : b : c;
+        x ? y ? a : a : b;
+        x ? y ? a : b : b;
+        x ? y ? a : b : a;
+        x ? y ? a : a : a;
+
+        x ? a : y ? b : c;
+        x ? a : y ? a : b;
+        x ? a : y ? b : b;
+        x ? a : y ? b : a;
+        x ? a : y ? a : a;
+    }
+    expect: {
+        x ? a : b;
+        x, a;
+
+        x ? y ? a : b : c;
+        x ? (y, a) : b;
+        x && y ? a : b;
+        !x || y ? a : b;
+        x && y, a;
+
+        x ? a : y ? b : c;
+        x || y ? a : b;
+        x ? a : (y, b);
+        !x && y ? b : a;
+        !x && y, a;
+    }
+}
+
 cond_7: {
     options = {
         conditionals: true,
@@ -645,6 +702,87 @@ cond_9: {
     }
 }
 
+cond_10: {
+    options = {
+        conditionals: true,
+        if_return: true,
+    }
+    input: {
+        function f(a) {
+            if (1 == a) return "foo";
+            if (2 == a) return "foo";
+            if (3 == a) return "foo";
+            if (4 == a) return 42;
+            if (5 == a) return "foo";
+            if (6 == a) return "foo";
+            return "bar";
+        }
+        console.log(f(1), f(2), f(3), f(4), f(5), f(6), f(7));
+    }
+    expect: {
+        function f(a) {
+            return 1 == a || 2 == a || 3 == a ? "foo" : 4 == a ? 42 : 5 == a || 6 == a ? "foo" : "bar";
+        }
+        console.log(f(1), f(2), f(3), f(4), f(5), f(6), f(7));
+    }
+    expect_stdout: "foo foo foo 42 foo foo bar"
+}
+
+cond_11: {
+    options = {
+        conditionals: true,
+    }
+    input: {
+        var o = {
+            p: "foo",
+            q: function() {
+                return this.p;
+            }
+        };
+        function f() {
+            return "bar";
+        }
+        function g(a) {
+            return a ? f() : o.q();
+        }
+        console.log(g(0), g(1));
+    }
+    expect: {
+        var o = {
+            p: "foo",
+            q: function() {
+                return this.p;
+            }
+        };
+        function f() {
+            return "bar";
+        }
+        function g(a) {
+            return a ? f() : o.q();
+        }
+        console.log(g(0), g(1));
+    }
+    expect_stdout: "foo bar"
+}
+
+cond_12: {
+    options = {
+        conditionals: true,
+    }
+    input: {
+        x ? y && a : a;
+        x ? y || a : a;
+        x ? a : y && a;
+        x ? a : y || a;
+    }
+    expect: {
+        (!x || y) && a;
+        x && y || a;
+        (x || y) && a;
+        !x && y || a;
+    }
+}
+
 ternary_boolean_consequent: {
     options = {
         booleans: true,
@@ -1292,3 +1430,239 @@ to_and_or: {
     }
     expect_stdout: true
 }
+
+cond_seq_assign_1: {
+    options = {
+        conditionals: true,
+        sequences: true,
+    }
+    input: {
+        function f(a) {
+            var t;
+            if (a) {
+                t = "foo";
+                t = "bar";
+            } else {
+                console.log(t);
+                t = 42;
+            }
+            console.log(t);
+        }
+        f(f);
+        f();
+    }
+    expect: {
+        function f(a) {
+            var t;
+            t = a ? (t = "foo", "bar") : (console.log(t), 42),
+            console.log(t);
+        }
+        f(f),
+        f();
+    }
+    expect_stdout: [
+        "bar",
+        "undefined",
+        "42",
+    ]
+}
+
+cond_seq_assign_2: {
+    options = {
+        conditionals: true,
+        sequences: true,
+    }
+    input: {
+        function f(a) {
+            var t;
+            if (a) {
+                t = "foo";
+                a = "bar";
+            } else {
+                console.log(t);
+                t = 42;
+            }
+            console.log(t);
+        }
+        f(f);
+        f();
+    }
+    expect: {
+        function f(a) {
+            var t;
+            a ? (t = "foo", a = "bar") : (console.log(t), t = 42),
+            console.log(t);
+        }
+        f(f),
+        f();
+    }
+    expect_stdout: [
+        "foo",
+        "undefined",
+        "42",
+    ]
+}
+
+cond_seq_assign_3: {
+    options = {
+        assignments: true,
+        conditionals: true,
+    }
+    input: {
+        var c = 0;
+        if (this)
+            c = 1 + c, c = c + 1;
+        else
+            c = 1 + c, c = c + 1;
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        this, c = 1 + c, c += 1;
+        console.log(c);
+    }
+    expect_stdout: "2"
+}
+
+issue_3271: {
+    options = {
+        conditionals: true,
+    }
+    input: {
+        function f(a) {
+            var i = 0, b = [];
+            if (a) {
+                b[i++] = 4,
+                b[i++] = 1;
+            } else {
+                b[i++] = 3,
+                b[i++] = 2,
+                b[i++] = 1;
+            }
+            return b;
+        }
+        console.log(f(0).pop(), f(1).pop());
+    }
+    expect: {
+        function f(a) {
+            var i = 0, b = [];
+            a ? b[i++] = 4 : (b[i++] = 3, b[i++] = 2),
+            b[i++] = 1;
+            return b;
+        }
+        console.log(f(0).pop(), f(1).pop());
+    }
+    expect_stdout: "1 1"
+}
+
+iife_condition: {
+    options = {
+        conditionals: true,
+        side_effects: true,
+    }
+    input: {
+        if (function() {
+            return console;
+        }())
+            console.log("PASS");
+    }
+    expect: {
+        !function() {
+            return console;
+        }() || console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+angularjs_chain: {
+    options = {
+        conditionals: true,
+        passes: 2,
+        side_effects: true,
+    }
+    input: {
+        function nonComputedMember(left, right, context, create) {
+            var lhs = left();
+            if (create && create !== 1) {
+                if (lhs && lhs[right] == null) {
+                    lhs[right] = {};
+                }
+            }
+            var value = lhs != null ? lhs[right] : undefined;
+            if (context) {
+                return { context: lhs, name: right, value: value };
+            } else {
+                return value;
+            }
+        }
+    }
+    expect: {
+        function nonComputedMember(left, right, context, create) {
+            var lhs = left();
+            create && 1 !== create && lhs && null == lhs[right] && (lhs[right] = {});
+            var value = null != lhs ? lhs[right] : void 0;
+            return context ? {
+                context: lhs,
+                name: right,
+                value: value
+            } : value;
+        }
+    }
+}
+
+issue_3576: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+    }
+    input: {
+        var c = "FAIL";
+        (function(a) {
+            (a = -1) ? (a && (a.a = 0)) : (a && (a.a = 0));
+            a && a[c = "PASS"]++;
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function(a) {
+            a = -1, a, a.a = 0;
+            a, a[c = "PASS"]++;
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3668: {
+    options = {
+        conditionals: true,
+        if_return: true,
+    }
+    input: {
+        function f() {
+            try {
+                var undefined = typeof f;
+                if (!f) return undefined;
+                return;
+            } catch (e) {
+                return "FAIL";
+            }
+        }
+        console.log(f());
+    }
+    expect: {
+        function f() {
+            try {
+                var undefined = typeof f;
+                return f ? void 0 : undefined;
+            } catch (e) {
+                return "FAIL";
+            }
+        }
+        console.log(f());
+    }
+    expect_stdout: "undefined"
+}

test/compress/dead-code.js

@@ -141,207 +141,6 @@ try_catch_finally: {
     ]
 }
 
-accessor: {
-    options = {
-        side_effects: true,
-    }
-    input: {
-        ({
-            get a() {},
-            set a(v){
-                this.b = 2;
-            },
-            b: 1
-        });
-    }
-    expect: {}
-}
-
-issue_2233_1: {
-    options = {
-        pure_getters: "strict",
-        side_effects: true,
-        unsafe: true,
-    }
-    input: {
-        Array.isArray;
-        Boolean;
-        console.log;
-        Date;
-        decodeURI;
-        decodeURIComponent;
-        encodeURI;
-        encodeURIComponent;
-        Error.name;
-        escape;
-        eval;
-        EvalError;
-        Function.length;
-        isFinite;
-        isNaN;
-        JSON;
-        Math.random;
-        Number.isNaN;
-        parseFloat;
-        parseInt;
-        RegExp;
-        Object.defineProperty;
-        String.fromCharCode;
-        RangeError;
-        ReferenceError;
-        SyntaxError;
-        TypeError;
-        unescape;
-        URIError;
-    }
-    expect: {}
-    expect_stdout: true
-}
-
-global_timeout_and_interval_symbols: {
-    options = {
-        pure_getters: "strict",
-        side_effects: true,
-        unsafe: true,
-    }
-    input: {
-        // These global symbols do not exist in the test sandbox
-        // and must be tested separately.
-        clearInterval;
-        clearTimeout;
-        setInterval;
-        setTimeout;
-    }
-    expect: {}
-}
-
-issue_2233_2: {
-    options = {
-        pure_getters: "strict",
-        reduce_funcs: true,
-        reduce_vars: true,
-        side_effects: true,
-        unsafe: true,
-        unused: true,
-    }
-    input: {
-        var RegExp;
-        Array.isArray;
-        RegExp;
-        UndeclaredGlobal;
-        function foo() {
-            var Number;
-            AnotherUndeclaredGlobal;
-            Math.sin;
-            Number.isNaN;
-        }
-    }
-    expect: {
-        var RegExp;
-        UndeclaredGlobal;
-        function foo() {
-            var Number;
-            AnotherUndeclaredGlobal;
-            Number.isNaN;
-        }
-    }
-}
-
-issue_2233_3: {
-    options = {
-        pure_getters: "strict",
-        reduce_funcs: true,
-        reduce_vars: true,
-        side_effects: true,
-        toplevel: true,
-        unsafe: true,
-        unused: true,
-    }
-    input: {
-        var RegExp;
-        Array.isArray;
-        RegExp;
-        UndeclaredGlobal;
-        function foo() {
-            var Number;
-            AnotherUndeclaredGlobal;
-            Math.sin;
-            Number.isNaN;
-        }
-    }
-    expect: {
-        UndeclaredGlobal;
-    }
-}
-
-global_fns: {
-    options = {
-        side_effects: true,
-        unsafe: true,
-    }
-    input: {
-        Boolean(1, 2);
-        decodeURI(1, 2);
-        decodeURIComponent(1, 2);
-        Date(1, 2);
-        encodeURI(1, 2);
-        encodeURIComponent(1, 2);
-        Error(1, 2);
-        escape(1, 2);
-        EvalError(1, 2);
-        isFinite(1, 2);
-        isNaN(1, 2);
-        Number(1, 2);
-        Object(1, 2);
-        parseFloat(1, 2);
-        parseInt(1, 2);
-        RangeError(1, 2);
-        ReferenceError(1, 2);
-        String(1, 2);
-        SyntaxError(1, 2);
-        TypeError(1, 2);
-        unescape(1, 2);
-        URIError(1, 2);
-        try {
-            Function(1, 2);
-        } catch (e) {
-            console.log(e.name);
-        }
-        try {
-            RegExp(1, 2);
-        } catch (e) {
-            console.log(e.name);
-        }
-        try {
-            Array(NaN);
-        } catch (e) {
-            console.log(e.name);
-        }
-    }
-    expect: {
-        try {
-            Function(1, 2);
-        } catch (e) {
-            console.log(e.name);
-        }
-        try {
-            RegExp(1, 2);
-        } catch (e) {
-            console.log(e.name);
-        }
-        try {
-            Array(NaN);
-        } catch (e) {
-            console.log(e.name);
-        }
-    }
-    expect_stdout: [
-        "SyntaxError",
-        "SyntaxError",
-        "RangeError",
-    ]
-}
-
 collapse_vars_assignment: {
     options = {
         collapse_vars: true,
@@ -863,23 +662,6 @@ issue_2749: {
     expect_stdout: "PASS"
 }
 
-unsafe_builtin: {
-    options = {
-        side_effects: true,
-        unsafe: true,
-    }
-    input: {
-        (!w).constructor(x);
-        Math.abs(y);
-        [ 1, 2, z ].valueOf();
-    }
-    expect: {
-        w, x;
-        y;
-        z;
-    }
-}
-
 issue_2860_1: {
     options = {
         dead_code: true,
@@ -892,9 +674,7 @@ issue_2860_1: {
         }());
     }
     expect: {
-        console.log(function(a) {
-            return 1 ^ a;
-        }());
+        console.log(1);
     }
     expect_stdout: "1"
 }
@@ -942,3 +722,173 @@ issue_2929: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3402: {
+    options = {
+        dead_code: true,
+        evaluate: true,
+        functions: true,
+        passes: 2,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        typeofs: true,
+        unused: true,
+    }
+    input: {
+        var f = function f() {
+            f = 42;
+            console.log(typeof f);
+        };
+        "function" == typeof f && f();
+        "function" == typeof f && f();
+        console.log(typeof f);
+    }
+    expect: {
+        function f() {
+            console.log(typeof f);
+        }
+        f();
+        f();
+        console.log(typeof f);
+    }
+    expect_stdout: [
+        "function",
+        "function",
+        "function",
+    ]
+}
+
+issue_3406: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        console.log(function f(a) {
+            return delete (f = a);
+        }());
+    }
+    expect: {
+        console.log(function f(a) {
+            return delete (0, a);
+        }());
+    }
+    expect_stdout: "true"
+}
+
+function_assign: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        console.log(function() {
+            var a = "PASS";
+            function h(c) {
+                return c;
+            }
+            h.p = function(b) {
+                return b;
+            }.p = a;
+            return h;
+        }().p);
+    }
+    expect: {
+        console.log(function() {
+            var a = "PASS";
+            function h(c) {
+                return c;
+            }
+            h.p = a;
+            return h;
+        }().p);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3552: {
+    options = {
+        dead_code: true,
+        pure_getters: "strict",
+    }
+    input: {
+        var a = "PASS";
+        (function() {
+            (1..p += 42) && (a = "FAIL");
+        })();
+        console.log(a);
+    }
+    expect: {
+        var a = "PASS";
+        (function() {
+            (1..p += 42) && (a = "FAIL");
+        })();
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}
+
+unreachable_assign: {
+    options = {
+        dead_code: true,
+        strings: true,
+    }
+    input: {
+        console.log(A = "P" + (A = "A" + (B = "S" + (A = B = "S"))), A, B);
+    }
+    expect: {
+        console.log(A = "P" + "A" + (B = "S" + "S"), A, B);
+    }
+    expect_stdout: "PASS PASS SS"
+}
+
+catch_return_assign: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        console.log(function() {
+            try {
+                throw "FAIL";
+            } catch (e) {
+                return e = "PASS";
+            }
+        }());
+    }
+    expect: {
+        console.log(function() {
+            try {
+                throw "FAIL";
+            } catch (e) {
+                return "PASS";
+            }
+        }());
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3578: {
+    options = {
+        dead_code: true,
+    }
+    input: {
+        var a = "FAIL", b, c;
+        try {
+            b = c.p = b = 0;
+        } catch (e) {
+            b += 42;
+            b && (a = "PASS");
+        }
+        console.log(a);
+    }
+    expect: {
+        var a = "FAIL", b, c;
+        try {
+            b = c.p = b = 0;
+        } catch (e) {
+            b += 42;
+            b && (a = "PASS");
+        }
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}

test/compress/directives.js

@@ -0,0 +1,133 @@
+simple_statement_is_not_a_directive: {
+    input: {
+        "use strict"
+            .split(" ")
+            .forEach(function(s) {
+                console.log(s);
+            });
+        console.log(!this); // is strict mode?
+        (function() {
+            "directive"
+            ""
+            "use strict"
+            "hello world"
+                .split(" ")
+                .forEach(function(s) {
+                    console.log(s);
+                });
+            console.log(!this); // is strict mode?
+        })();
+    }
+    expect: {
+        "use strict".split(" ").forEach(function(s) {
+            console.log(s);
+        });
+        console.log(!this);
+        (function() {
+            "directive";
+            "";
+            "use strict";
+            "hello world".split(" ").forEach(function(s) {
+                console.log(s);
+            });
+            console.log(!this);
+        })();
+    }
+    expect_stdout: [
+        "use",
+        "strict",
+        "false",
+        "hello",
+        "world",
+        "true",
+    ]
+}
+
+drop_lone_use_strict: {
+    options = {
+        directives: true,
+        side_effects: true,
+    }
+    input: {
+        function f1() {
+            "use strict";
+        }
+        function f2() {
+            "use strict";
+            function f3() {
+                "use strict";
+            }
+        }
+        (function f4() {
+            "use strict";
+        })();
+    }
+    expect: {
+        function f1() {
+        }
+        function f2() {
+            "use strict";
+            function f3() {
+            }
+        }
+    }
+}
+
+issue_3166: {
+    options = {
+        directives: true,
+    }
+    input: {
+        "foo";
+        "use strict";
+        function f() {
+            "use strict";
+            "bar";
+            "use asm";
+        }
+    }
+    expect: {
+        "use strict";
+        function f() {
+            "use asm";
+        }
+    }
+}
+
+valid_after_invalid_1: {
+    input: {
+        console.log(typeof function() {
+            "use\x20strict";
+            "use strict";
+            return this;
+        }());
+    }
+    expect: {
+        console.log(typeof function() {
+            "use\x20strict";
+            "use strict";
+            return this;
+        }());
+    }
+    expect_stdout: "undefined"
+}
+
+valid_after_invalid_2: {
+    options = {
+        directives: true,
+    }
+    input: {
+        console.log(typeof function() {
+            "use\x20strict";
+            "use strict";
+            return this;
+        }());
+    }
+    expect: {
+        console.log(typeof function() {
+            "use strict";
+            return this;
+        }());
+    }
+    expect_stdout: "undefined"
+}

test/compress/drop-unused.js

@@ -144,7 +144,7 @@ unused_var_in_catch: {
         function foo() {
             try {
                 foo();
-            } catch(ex) {
+            } catch (ex) {
                 var x = 10;
             }
         }
@@ -153,7 +153,7 @@ unused_var_in_catch: {
         function foo() {
             try {
                 foo();
-            } catch(ex) {}
+            } catch (ex) {}
         }
     }
 }
@@ -166,7 +166,7 @@ used_var_in_catch: {
         function foo() {
             try {
                 foo();
-            } catch(ex) {
+            } catch (ex) {
                 var x = 10;
             }
             return x;
@@ -176,7 +176,7 @@ used_var_in_catch: {
         function foo() {
             try {
                 foo();
-            } catch(ex) {
+            } catch (ex) {
                 var x = 10;
             }
             return x;
@@ -699,18 +699,6 @@ iife: {
     }
 }
 
-drop_value: {
-    options = {
-        side_effects: true,
-    }
-    input: {
-        (1, [2, foo()], 3, {a:1, b:bar()});
-    }
-    expect: {
-        foo(), bar();
-    }
-}
-
 issue_1539: {
     options = {
         collapse_vars: true,
@@ -797,6 +785,7 @@ assign_chain: {
 issue_1583: {
     options = {
         keep_fargs: true,
+        passes: 2,
         reduce_funcs: true,
         reduce_vars: true,
         unused: true,
@@ -1004,7 +993,7 @@ issue_1715_4: {
 delete_assign_1: {
     options = {
         booleans: true,
-        side_effects: true,
+        evaluate: true,
         toplevel: true,
         unused: true,
     }
@@ -1018,21 +1007,28 @@ delete_assign_1: {
         console.log(delete (a = 0 / 0));
     }
     expect: {
-        console.log((void 0, !0));
-        console.log((void 0, !0));
-        console.log((1 / 0, !0));
-        console.log((1 / 0, !0));
-        console.log((NaN, !0));
-        console.log((0 / 0, !0));
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
     }
-    expect_stdout: true
+    expect_stdout: [
+        "true",
+        "true",
+        "true",
+        "true",
+        "true",
+        "true",
+    ]
 }
 
 delete_assign_2: {
     options = {
         booleans: true,
+        evaluate: true,
         keep_infinity: true,
-        side_effects: true,
         toplevel: true,
         unused: true,
     }
@@ -1046,14 +1042,21 @@ delete_assign_2: {
         console.log(delete (a = 0 / 0));
     }
     expect: {
-        console.log((void 0, !0));
-        console.log((void 0, !0));
-        console.log((Infinity, !0));
-        console.log((1 / 0, !0));
-        console.log((NaN, !0));
-        console.log((0 / 0, !0));
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
+        console.log(!0);
     }
-    expect_stdout: true
+    expect_stdout: [
+        "true",
+        "true",
+        "true",
+        "true",
+        "true",
+        "true",
+    ]
 }
 
 drop_var: {
@@ -1144,6 +1147,7 @@ var_catch_toplevel: {
     options = {
         conditionals: true,
         negate_iife: true,
+        passes: 2,
         reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
@@ -1156,7 +1160,7 @@ var_catch_toplevel: {
             try {
                 a++;
                 x();
-            } catch(a) {
+            } catch (a) {
                 if (a) var a;
                 var a = 10;
             }
@@ -1167,7 +1171,7 @@ var_catch_toplevel: {
         !function() {
             try {
                 x();
-            } catch(a) {
+            } catch (a) {
                 var a;
             }
         }();
@@ -1187,10 +1191,10 @@ issue_2105_1: {
     input: {
         !function(factory) {
             factory();
-        }( function() {
+        }(function() {
             return function(fn) {
                 fn()().prop();
-            }( function() {
+            }(function() {
                 function bar() {
                     var quux = function() {
                         console.log("PASS");
@@ -1201,7 +1205,7 @@ issue_2105_1: {
                     return { prop: foo };
                 }
                 return bar;
-            } );
+            });
         });
     }
     expect: {
@@ -1231,10 +1235,10 @@ issue_2105_2: {
     input: {
         !function(factory) {
             factory();
-        }( function() {
+        }(function() {
             return function(fn) {
                 fn()().prop();
-            }( function() {
+            }(function() {
                 function bar() {
                     var quux = function() {
                         console.log("PASS");
@@ -1245,7 +1249,7 @@ issue_2105_2: {
                     return { prop: foo };
                 }
                 return bar;
-            } );
+            });
         });
     }
     expect: {
@@ -1254,6 +1258,44 @@ issue_2105_2: {
     expect_stdout: "PASS"
 }
 
+issue_2105_3: {
+    options = {
+        inline: true,
+        passes: 2,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        !function(factory) {
+            factory();
+        }(function() {
+            return function(fn) {
+                fn()().prop();
+            }(function() {
+                function bar() {
+                    var quux = function() {
+                        console.log("PASS");
+                    }, foo = function() {
+                        console.log;
+                        quux();
+                    };
+                    return { prop: foo };
+                }
+                return bar;
+            });
+        });
+    }
+    expect: {
+        !void void {
+            prop: function() {
+                console.log;
+                void console.log("PASS");
+            }
+        }.prop();
+    }
+    expect_stdout: "PASS"
+}
+
 issue_2226_1: {
     options = {
         side_effects: true,
@@ -1633,7 +1675,7 @@ double_assign_2: {
     }
     expect: {
         for (var i = 0; i < 2; i++)
-            void 0, a = {}, console.log(a);
+            a = {}, console.log(a);
         var a;
     }
 }
@@ -1714,7 +1756,7 @@ issue_2768: {
     }
     expect: {
         var a = "FAIL";
-        var c = (d = a, 0, void (d && (a = "PASS")));
+        var c = (d = a, void (d && (a = "PASS")));
         var d;
         console.log(a, typeof c);
     }
@@ -1982,3 +2024,392 @@ issue_3192: {
         "foo bar",
     ]
 }
+
+issue_3233: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a = function b() {
+            b.c = "PASS";
+        };
+        a();
+        console.log(a.c);
+    }
+    expect: {
+        var a = function b() {
+            b.c = "PASS";
+        };
+        a();
+        console.log(a.c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3375: {
+    options = {
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var b = 1;
+        var a = c = [], c = --b + ("function" == typeof f && f());
+        var a = c && c[a];
+        console.log(a, b);
+    }
+    expect: {
+        var b = 1;
+        var a = [], c = --b + ("function" == typeof f && f());
+        a = c && c[a];
+        console.log(a, b);
+    }
+    expect_stdout: "0 0"
+}
+
+issue_3427_1: {
+    options = {
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            a = a || {};
+        })();
+    }
+    expect: {}
+}
+
+issue_3427_2: {
+    options = {
+        unused: true,
+    }
+    input: {
+        (function() {
+            var s = "PASS";
+            console.log(s = s || "FAIL");
+        })();
+    }
+    expect: {
+        (function() {
+            var s = "PASS";
+            console.log(s = s || "FAIL");
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3495: {
+    options = {
+        dead_code: true,
+        pure_getters: "strict",
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        console.log(function f() {
+            f = 0;
+            var a = f.p;
+        }());
+    }
+    expect: {
+        console.log(void 0);
+    }
+    expect_stdout: "undefined"
+}
+
+issue_3497: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        console.log(function(b) {
+            (b += a).p = 0;
+        }());
+    }
+    expect: {
+        var a;
+        console.log(function(b) {
+            (b += a).p = 0;
+        }());
+    }
+    expect_stdout: "undefined"
+}
+
+issue_3515_1: {
+    options = {
+        collapse_vars: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        (function() {
+            this[c++] = 0;
+            var expr20 = !0;
+            for (var key20 in expr20);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function() {
+            this[c++] = 0;
+            for (var key20 in !0);
+        })();
+        console.log(c);
+    }
+    expect_stdout: "1"
+}
+
+issue_3515_2: {
+    options = {
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a = "FAIL";
+        function f() {
+            typeof b === "number";
+            delete a;
+        }
+        var b = f(a = "PASS");
+        console.log(a);
+    }
+    expect: {
+        var a = "FAIL";
+        function f() {
+            delete a;
+        }
+        f(a = "PASS");
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3515_3: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var c = "FAIL";
+        (function() {
+            function f() {
+                c = "PASS";
+            }
+            var a = f();
+            var a = function g(b) {
+                b && (b.p = this);
+            }(a);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function() {
+            function f() {
+                c = "PASS";
+            }
+            (function(b) {
+                b && (b.p = this);
+            })(f());
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+function_assign: {
+    options = {
+        pure_getters: "strict",
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        console.log(function() {
+            var a = "PASS";
+            function g(b) {
+                return b;
+            }
+            g.p = a;
+            function h(c) {
+                return c;
+            }
+            h.p = a;
+            return h;
+        }().p);
+    }
+    expect: {
+        console.log(function() {
+            var a = "PASS";
+            function h(c) {
+                return c;
+            }
+            h.p = a;
+            return h;
+        }().p);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3598: {
+    options = {
+        collapse_vars: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = "FAIL";
+        try {
+            (function() {
+                var b = void 0;
+                a = "PASS";
+                c.p = 0;
+                var c = b[!1];
+            })();
+        } catch (e) {}
+        console.log(a);
+    }
+    expect: {
+        var a = "FAIL";
+        try {
+            (function() {
+                a = "PASS";
+                var c = (void (c.p = 0))[!1];
+            })();
+        } catch (e) {}
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}
+
+self_assign: {
+    options = {
+        passes: 2,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        function d(a) {
+            a = a;
+        }
+        function e(a, b) {
+            a = b;
+            b = a;
+        }
+        function f(a, b, c) {
+            a = b;
+            b = c;
+            c = a;
+        }
+        function g(a, b, c) {
+            a = a * b + c;
+        }
+    }
+    expect: {
+        function d(a) {}
+        function e(a, b) {}
+        function f(a, b, c) {}
+        function g(a, b, c) {}
+    }
+}
+
+function_argument_reference: {
+    options = {
+        keep_fargs: false,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var a = 1, b = 42;
+        function f(a) {
+            b <<= a;
+        }
+        f();
+        console.log(a, b);
+    }
+    expect: {
+        var a = 1, b = 42;
+        function f(a) {
+            b <<= a;
+        }
+        f();
+        console.log(a, b);
+    }
+    expect_stdout: "1 42"
+}
+
+function_parameter_ie8: {
+    options = {
+        ie8: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a;
+            function f() {
+                console.log("PASS");
+            }
+            f(a = 1 + a);
+        })();
+    }
+    expect: {
+        (function() {
+            (function f() {
+                console.log("PASS");
+            })();
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3664: {
+    options = {
+        pure_getters: "strict",
+        unused: true,
+    }
+    input: {
+        console.log(function() {
+            var a, b = (a = (a = [ b && console.log("FAIL") ]).p = 0, 0);
+            return "PASS";
+        }());
+    }
+    expect: {
+        console.log(function() {
+            var b = ([ b && console.log("FAIL") ].p = 0, 0);
+            return "PASS";
+        }());
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3673: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        (a = [ a ]).p = 42;
+        console.log("PASS");
+    }
+    expect: {
+        var a;
+        (a = [ a ]).p = 42;
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}

test/compress/evaluate.js

@@ -237,22 +237,39 @@ unsafe_constant: {
         unsafe: true,
     }
     input: {
-        console.log(
-            true.a,
-            false.a,
-            null.a,
-            undefined.a
-        );
+        console.log(true.a, false.a);
+        console.log(true.valueOf(), false.valueOf());
+        try {
+            console.log(null.a);
+        } catch (e) {
+            console.log("PASS");
+        }
+        try {
+            console.log(undefined.a);
+        } catch (e) {
+            console.log("PASS");
+        }
     }
     expect: {
-        console.log(
-            true.a,
-            false.a,
-            null.a,
-            (void 0).a
-        );
+        console.log(void 0, void 0);
+        console.log(true, false);
+        try {
+            console.log(null.a);
+        } catch (e) {
+            console.log("PASS");
+        }
+        try {
+            console.log((void 0).a);
+        } catch (e) {
+            console.log("PASS");
+        }
     }
-    expect_stdout: true
+    expect_stdout: [
+        "undefined undefined",
+        "true false",
+        "PASS",
+        "PASS",
+    ]
 }
 
 unsafe_object: {
@@ -278,7 +295,7 @@ unsafe_object: {
             o + 1,
             2,
             o.b + 1,
-            1..b + 1
+            NaN
         );
     }
     expect_stdout: true
@@ -365,7 +382,7 @@ unsafe_object_repeated: {
             o + 1,
             2,
             o.b + 1,
-            1..b + 1
+            NaN
         );
     }
     expect_stdout: true
@@ -444,8 +461,8 @@ unsafe_integer_key: {
             2,
             2,
             ({0:1})[1] + 1,
-            1[1] + 1,
-            1["1"] + 1
+            NaN,
+            NaN
         );
     }
     expect_stdout: true
@@ -500,8 +517,8 @@ unsafe_float_key: {
             2,
             2,
             ({2.72:1})[3.14] + 1,
-            1[3.14] + 1,
-            1["3.14"] + 1
+            NaN,
+            NaN
         );
     }
     expect_stdout: true
@@ -635,12 +652,12 @@ unsafe_string_bad_index: {
     }
     expect: {
         console.log(
-            "1234".a + 1,
-            "1234"["a"] + 1,
-            "1234"[3.14] + 1
+            NaN,
+            NaN,
+            NaN
         );
     }
-    expect_stdout: true
+    expect_stdout: "NaN NaN NaN"
 }
 
 prototype_function: {
@@ -820,8 +837,8 @@ unsafe_charAt_noop: {
     }
     expect: {
         console.log(
-            s.charAt(0),
-            "string".charAt(x),
+            s[0],
+            "string"[0 | x],
             (typeof x)[0]
         );
     }
@@ -1124,14 +1141,14 @@ issue_2207_1: {
         console.log(Math.max(3, 6, 2, 7, 3, 4));
         console.log(Math.cos(1.2345));
         console.log(Math.cos(1.2345) - Math.sin(4.321));
-        console.log(Math.pow(Math.PI, Math.E - Math.LN10));
+        console.log(Math.pow(Math.PI, Math.E - Math.LN10).toFixed(15));
     }
     expect: {
         console.log("A");
         console.log(7);
         console.log(Math.cos(1.2345));
         console.log(1.2543732512566947);
-        console.log(1.6093984514472044);
+        console.log("1.609398451447204");
     }
     expect_stdout: true
 }
@@ -1245,12 +1262,12 @@ self_comparison_1: {
     }
     input: {
         var o = { n: NaN };
-        console.log(o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n, typeof o.n);
+        console.log(typeof o.n, o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n);
     }
     expect: {
-        console.log(false, false, true, true, "number");
+        console.log("number", false, false, true, true);
     }
-    expect_stdout: "false false true true 'number'"
+    expect_stdout: "number false false true true"
 }
 
 self_comparison_2: {
@@ -1265,12 +1282,12 @@ self_comparison_2: {
     }
     input: {
         var o = { n: NaN };
-        console.log(o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n, typeof o.n);
+        console.log(typeof o.n, o.n == o.n, o.n === o.n, o.n != o.n, o.n !== o.n);
     }
     expect: {
-        console.log(false, false, true, true, "number");
+        console.log("number", false, false, true, true);
     }
-    expect_stdout: "false false true true 'number'"
+    expect_stdout: "number false false true true"
 }
 
 issue_2535_1: {
@@ -1540,7 +1557,7 @@ issue_2926_2: {
     expect_stdout: "function"
 }
 
-issue_2968: {
+issue_2968_1: {
     options = {
         collapse_vars: true,
         evaluate: true,
@@ -1571,6 +1588,39 @@ issue_2968: {
     expect_stdout: "PASS"
 }
 
+issue_2968_2: {
+    options = {
+        assignments: true,
+        collapse_vars: true,
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        reduce_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = "FAIL";
+        (function() {
+            (function(a, b) {
+                a <<= 0;
+                a && (a[(c = "PASS", 0 >>> (b += 1))] = 0);
+            })(42, -42);
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        (function() {
+            a = 42,
+            ((a <<= 0) && (a[(c = "PASS", 0)] = 0));
+            var a;
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
 truthy_conditionals: {
     options = {
         conditionals: true,
@@ -1610,3 +1660,504 @@ truthy_loops: {
         }
     }
 }
+
+if_increment: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            if (console)
+                return ++a;
+        }(0));
+    }
+    expect: {
+        console.log(function(a) {
+            if (console)
+                return 1;
+        }());
+    }
+    expect_stdout: "1"
+}
+
+try_increment: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a) {
+            try {
+                return ++a;
+            } catch (e) {}
+        }(0));
+    }
+    expect: {
+        console.log(function(a) {
+            try {
+                return 1;
+            } catch (e) {}
+        }());
+    }
+    expect_stdout: "1"
+}
+
+unsafe_escaped: {
+    options = {
+        evaluate: true,
+        inline: true,
+        passes: 3,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        (function(a) {
+            console.log(function(index) {
+                return a[index];
+            }(function(term) {
+                return a.indexOf(term);
+            }("PASS")));
+        })([ "PASS" ]);
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+unsafe_string_replace: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        "foo".replace("f", function() {
+            console.log("PASS");
+        });
+    }
+    expect: {
+        "foo".replace("f", function() {
+            console.log("PASS");
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3387_1: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        console.log(1 + (2 + "3"[4]));
+    }
+    expect: {
+        console.log(1 + (2 + "3"[4]));
+    }
+    expect_stdout: "NaN"
+}
+
+issue_3387_2: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(1 + (2 + "3"[4]));
+    }
+    expect: {
+        console.log(NaN);
+    }
+    expect_stdout: "NaN"
+}
+
+simple_function_1: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function sum(a, b) {
+            return a + b;
+        }
+        console.log(sum(1, 2) * sum(3, 4));
+    }
+    expect: {
+        console.log(21);
+    }
+    expect_stdout: "21"
+}
+
+simple_function_2: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var sum = function(a, b) {
+            return a + b;
+        }
+        console.log(sum(1, 2) * sum(3, 4));
+    }
+    expect: {
+        console.log(21);
+    }
+    expect_stdout: "21"
+}
+
+recursive_function_1: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function factorial(a) {
+            return a > 0 ? a * factorial(a - 1) : 1;
+        }
+        console.log(factorial(5));
+    }
+    expect: {
+        console.log(function factorial(a) {
+            return a > 0 ? a * factorial(a - 1) : 1;
+        }(5));
+    }
+    expect_stdout: "120"
+}
+
+recursive_function_2: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var factorial = function(a) {
+            return a > 0 ? a * factorial(a - 1) : 1;
+        }
+        console.log(factorial(5));
+    }
+    expect: {
+        var factorial = function(a) {
+            return a > 0 ? a * factorial(a - 1) : 1;
+        }
+        console.log(factorial(5));
+    }
+    expect_stdout: "120"
+}
+
+issue_3558: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        function f(a) {
+            return 1 + --a;
+        }
+        console.log(f(true), f(false));
+    }
+    expect: {
+        function f(a) {
+            return 1 + --a;
+        }
+        console.log(1, 0);
+    }
+    expect_stdout: "1 0"
+}
+
+issue_3568: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+    }
+    input: {
+        var a = 0;
+        function f(b) {
+            return b && b.p;
+        }
+        console.log(f(++a + f()));
+    }
+    expect: {
+        var a = 0;
+        function f(b) {
+            return b && b.p;
+        }
+        console.log(NaN);
+    }
+    expect_stdout: "NaN"
+}
+
+conditional_function: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        function f(a) {
+            return a && "undefined" != typeof A ? A : 42;
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            return a && "undefined" != typeof A ? A : 42;
+        }
+        console.log(42, f(1));
+    }
+    expect_stdout: "42 42"
+}
+
+best_of_evaluate: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function d(x, y) {
+            return x / y;
+        }
+        console.log(0 / 3, 1 / 64, 4 / 7, 7 / 7);
+        console.log(d(0, 3), d(1, 64), d(4, 7), d(7, 7));
+    }
+    expect: {
+        function d(x, y) {
+            return x / y;
+        }
+        console.log(0, 1 / 64, 4 / 7, 1);
+        console.log(0, .015625, d(4, 7), 1);
+    }
+    expect_stdout: [
+        "0 0.015625 0.5714285714285714 1",
+        "0 0.015625 0.5714285714285714 1",
+    ]
+}
+
+eager_evaluate: {
+    options = {
+        evaluate: "eager",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function d(x, y) {
+            return x / y;
+        }
+        console.log(0 / 3, 1 / 64, 4 / 7, 7 / 7);
+        console.log(d(0, 3), d(1, 64), d(4, 7), d(7, 7));
+    }
+    expect: {
+        console.log(0, .015625, .5714285714285714, 1);
+        console.log(0, .015625, .5714285714285714, 1);
+    }
+    expect_stdout: [
+        "0 0.015625 0.5714285714285714 1",
+        "0 0.015625 0.5714285714285714 1",
+    ]
+}
+
+threshold_evaluate_default: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log(b("1"), b(2), b(b(b("ABCDEFGHIJK"))));
+    }
+    expect: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log("111", 6, b(b(b("ABCDEFGHIJK"))));
+    }
+    expect_stdout: "111 6 ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK"
+}
+
+threshold_evaluate_30: {
+    options = {
+        evaluate: 30,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log(b("1"), b(2), b(b(b("ABCDEFGHIJK"))));
+    }
+    expect: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log("111", 6, b(b("ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK")));
+    }
+    expect_stdout: "111 6 ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK"
+}
+
+threshold_evaluate_100: {
+    options = {
+        evaluate: 100,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log(b("1"), b(2), b(b(b("ABCDEFGHIJK"))));
+    }
+    expect: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log("111", 6, b("ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK"));
+    }
+    expect_stdout: "111 6 ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK"
+}
+
+threshold_evaluate_999: {
+    options = {
+        evaluate: 999,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function b(x) {
+            return x + x + x;
+        }
+        console.log(b("1"), b(2), b(b(b("ABCDEFGHIJK"))));
+    }
+    expect: {
+        console.log("111", 6, "ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK");
+    }
+    expect_stdout: "111 6 ABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJKABCDEFGHIJK"
+}
+
+collapse_vars_regexp: {
+    options = {
+        booleans: true,
+        collapse_vars: true,
+        comparisons: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        hoist_funs: true,
+        if_return: true,
+        join_vars: true,
+        keep_fargs: true,
+        loops: false,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe_regexp: true,
+        unused: true,
+    }
+    input: {
+        function f1() {
+            var k = 9;
+            var rx = /[A-Z]+/;
+            return [rx, k];
+        }
+        function f2() {
+            var rx = /ab*/g;
+            return function(s) {
+                return rx.exec(s);
+            };
+        }
+        function f3() {
+            var rx = /ab*/g;
+            return function() {
+                return rx;
+            };
+        }
+        (function() {
+            var result;
+            var s = "acdabcdeabbb";
+            var rx = /ab*/g;
+            while (result = rx.exec(s))
+                console.log(result[0]);
+        })();
+        (function() {
+            var result;
+            var s = "acdabcdeabbb";
+            var rx = f2();
+            while (result = rx(s))
+                console.log(result[0]);
+        })();
+        (function() {
+            var result;
+            var s = "acdabcdeabbb";
+            var rx = f3();
+            while (result = rx().exec(s))
+                console.log(result[0]);
+        })();
+    }
+    expect: {
+        function f1() {
+            return [/[A-Z]+/, 9];
+        }
+        function f2() {
+            var rx = /ab*/g;
+            return function(s) {
+                return rx.exec(s);
+            };
+        }
+        function f3() {
+            var rx = /ab*/g;
+            return function() {
+                return rx;
+            };
+        }
+        (function() {
+            var result, rx = /ab*/g;
+            while (result = rx.exec("acdabcdeabbb"))
+                console.log(result[0]);
+        })();
+        (function() {
+            var result, rx = f2();
+            while (result = rx("acdabcdeabbb"))
+                console.log(result[0]);
+        })();
+        (function() {
+            var result, rx = f3();
+            while (result = rx().exec("acdabcdeabbb"))
+                console.log(result[0]);
+        })();
+    }
+    expect_stdout: [
+        "a",
+        "ab",
+        "abbb",
+        "a",
+        "ab",
+        "abbb",
+        "a",
+        "ab",
+        "abbb",
+    ]
+}

test/compress/hoist_props.js

@@ -664,7 +664,7 @@ issue_2519: {
     }
     expect: {
         function testFunc() {
-            return 1 * ((6 + 5) / 2);
+            return +((6 + 5) / 2);
         }
         console.log(testFunc());
     }
@@ -862,3 +862,55 @@ issue_3071_3: {
     }
     expect_stdout: "2"
 }
+
+issue_3411: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+    }
+    input: {
+        var c = 1;
+        !function f() {
+            var o = {
+                p: --c && f()
+            };
+            +o || console.log("PASS");
+        }();
+    }
+    expect: {
+        var c = 1;
+        !function f() {
+            var o_p = --c && f();
+            +{} || console.log("PASS");
+        }();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3440: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            function f() {
+                console.log(o.p);
+            }
+            var o = {
+                p: "PASS",
+            };
+            return f;
+        })()();
+    }
+    expect: {
+        (function() {
+            var o_p = "PASS";
+            return function() {
+                console.log(o_p);
+            };
+        })()();
+    }
+    expect_stdout: "PASS"
+}

test/compress/html_comments.js

@@ -1,55 +1,107 @@
 html_comment_in_expression: {
     input: {
-        function f(a, b, x, y) { return a < !--b && x-- > y; }
+        (function(a, b) {
+            console.log(a < !--b && a-- > b, a, b);
+        })(1, 2);
     }
-    expect_exact: "function f(a,b,x,y){return a< !--b&&x-- >y}";
+    expect_exact: "(function(a,b){console.log(a<! --b&&a-- >b,a,b)})(1,2);"
+    expect_stdout: "false 1 1"
 }
 
 html_comment_in_less_than: {
     input: {
-        function f(a, b) { return a < !--b; }
+        (function(a, b, c) {
+            console.log(
+                a < !--b,
+                a < !--b + c,
+                a + b < !--c,
+                a, b, c
+            );
+        })(1, 2, 3);
     }
-    expect_exact: "function f(a,b){return a< !--b}";
+    expect_exact: "(function(a,b,c){console.log(a<! --b,a<! --b+c,a+b<! --c,a,b,c)})(1,2,3);"
+    expect_stdout: "false true false 1 0 2"
 }
 
 html_comment_in_left_shift: {
     input: {
-        function f(a, b) { return a << !--b; }
+        (function(a, b, c) {
+            console.log(
+                a << !--b,
+                a << !--b + c,
+                a + b << !--c,
+                a, b, c
+            );
+        })(1, 2, 3);
     }
-    expect_exact: "function f(a,b){return a<< !--b}";
-}
-
-html_comment_in_right_shift: {
-    input: {
-        function f(a, b) { return a-- >> b; }
-    }
-    expect_exact: "function f(a,b){return a-- >>b}";
-}
-
-html_comment_in_zero_fill_right_shift: {
-    input: {
-        function f(a, b) { return a-- >>> b; }
-    }
-    expect_exact: "function f(a,b){return a-- >>>b}";
+    expect_exact: "(function(a,b,c){console.log(a<<! --b,a<<! --b+c,a+b<<! --c,a,b,c)})(1,2,3);"
+    expect_stdout: "1 16 1 1 0 2"
 }
 
 html_comment_in_greater_than: {
     input: {
-        function f(a, b) { return a-- > b; }
+        (function(a, b, c) {
+            console.log(
+                a-- > b,
+                a-- > b + c,
+                a + b-- > c,
+                a, b, c
+            );
+        })(1, 2, 3);
     }
-    expect_exact: "function f(a,b){return a-- >b}";
+    expect_exact: "(function(a,b,c){console.log(a-- >b,a-- >b+c,a+b-- >c,a,b,c)})(1,2,3);"
+    expect_stdout: "false false false -1 1 3"
 }
 
 html_comment_in_greater_than_or_equal: {
     input: {
-        function f(a, b) { return a-- >= b; }
+        (function(a, b, c) {
+            console.log(
+                a-- >= b,
+                a-- >= b + c,
+                a + b-- >= c,
+                a, b, c
+            );
+        })(1, 2, 3);
     }
-    expect_exact: "function f(a,b){return a-- >=b}";
+    expect_exact: "(function(a,b,c){console.log(a-- >=b,a-- >=b+c,a+b-- >=c,a,b,c)})(1,2,3);"
+    expect_stdout: "false false false -1 1 3"
+}
+
+html_comment_in_right_shift: {
+    input: {
+        (function(a, b, c) {
+            console.log(
+                a-- >> b,
+                a-- >> b + c,
+                a + b-- >> c,
+                a, b, c
+            );
+        })(1, 2, 3);
+    }
+    expect_exact: "(function(a,b,c){console.log(a-- >>b,a-- >>b+c,a+b-- >>c,a,b,c)})(1,2,3);"
+    expect_stdout: "0 0 0 -1 1 3"
+}
+
+html_comment_in_zero_fill_right_shift: {
+    input: {
+        (function(a, b, c) {
+            console.log(
+                a-- >>> b,
+                a-- >>> b + c,
+                a + b-- >>> c,
+                a, b, c
+            );
+        })(1, 2, 3);
+    }
+    expect_exact: "(function(a,b,c){console.log(a-- >>>b,a-- >>>b+c,a+b-- >>>c,a,b,c)})(1,2,3);"
+    expect_stdout: "0 0 0 -1 1 3"
 }
 
 html_comment_in_string_literal: {
     input: {
-        function f() { return "<!--HTML-->comment in<!--string literal-->"; }
+        console.log("<!--HTML-->comment in<!--string literal-->".length);
     }
-    expect_exact: 'function f(){return"\\x3c!--HTML--\\x3ecomment in\\x3c!--string literal--\\x3e"}';
+    expect_exact: 'console.log("\\x3c!--HTML--\\x3ecomment in\\x3c!--string literal--\\x3e".length);'
+    expect_stdout: "42"
 }

test/compress/if_return.js

@@ -396,3 +396,180 @@ if_if_return_return: {
         }
     }
 }
+
+if_body_return_1: {
+    options = {
+        if_return: true,
+    }
+    input: {
+        var c = "PASS";
+        function f(a, b) {
+            if (a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect: {
+        var c = "PASS";
+        function f(a, b) {
+            if (a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "42",
+        "PASS",
+    ]
+}
+
+if_body_return_2: {
+    options = {
+        if_return: true,
+    }
+    input: {
+        var c = "PASS";
+        function f(a, b) {
+            if (0 + a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect: {
+        var c = "PASS";
+        function f(a, b) {
+            if (0 + a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "42",
+        "PASS",
+    ]
+}
+
+if_body_return_3: {
+    options = {
+        if_return: true,
+    }
+    input: {
+        var c = "PASS";
+        function f(a, b) {
+            if (1 == a) {
+                if (b) throw new Error(c);
+                return 42;
+            }
+            return true;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect: {
+        var c = "PASS";
+        function f(a, b) {
+            if (1 != a) return true;
+            if (b) throw new Error(c);
+            return 42;
+        }
+        console.log(f(0, 0));
+        console.log(f(0, 1));
+        console.log(f(1, 0));
+        try {
+            f(1, 1);
+            console.log("FAIL");
+        } catch (e) {
+            console.log(e.message);
+        }
+    }
+    expect_stdout: [
+        "true",
+        "true",
+        "42",
+        "PASS",
+    ]
+}
+
+issue_3600: {
+    options = {
+        if_return: true,
+        inline: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        var c = 0;
+        (function() {
+            if ([ ][c++]); else return;
+            return void function() {
+                var b = --b, a = c = 42;
+                return c;
+            }();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        (function() {
+            if ([][c++]) b = --b, c = 42;
+            var b;
+        })();
+        console.log(c);
+    }
+    expect_stdout: "1"
+}

test/compress/issue-1034.js

@@ -30,7 +30,7 @@ non_hoisted_function_after_return: {
     }
     expect: {
         function foo(x) {
-            return x ? bar() : baz();
+            return (x ? bar : baz)();
             function bar() { return 7 }
             function baz() { return 8 }
         }
@@ -59,7 +59,6 @@ non_hoisted_function_after_return_2a: {
         passes: 2,
         side_effects: true,
         unused: true,
-        warnings: "verbose",
     }
     input: {
         function foo(x) {
@@ -91,13 +90,13 @@ non_hoisted_function_after_return_2a: {
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:7,16]",
         "WARN: Dropping unused variable a [test/compress/issue-1034.js:4,20]",
         "WARN: Dropping unused function nope [test/compress/issue-1034.js:11,21]",
-        "WARN: pass 0: last_count: Infinity, count: 37",
+        "INFO: pass 0: last_count: Infinity, count: 37",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:9,12]",
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:9,12]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:12,12]",
-        "WARN: Dropping unused variable b [test/compress/issue-1034.js:7,20]",
-        "WARN: Dropping unused variable c [test/compress/issue-1034.js:9,16]",
-        "WARN: pass 1: last_count: 37, count: 18",
+        "INFO: Dropping unused variable b [test/compress/issue-1034.js:7,20]",
+        "INFO: Dropping unused variable c [test/compress/issue-1034.js:9,16]",
+        "INFO: pass 1: last_count: 37, count: 18",
     ]
 }
 
@@ -182,7 +181,7 @@ non_hoisted_function_after_return_strict: {
     expect: {
         "use strict";
         function foo(x) {
-            return x ? bar() : baz();
+            return (x ? bar : baz)();
             function bar() { return 7 }
             function baz() { return 8 }
         }
@@ -213,7 +212,6 @@ non_hoisted_function_after_return_2a_strict: {
         passes: 2,
         side_effects: true,
         unused: true,
-        warnings: "verbose",
     }
     input: {
         "use strict";
@@ -250,13 +248,13 @@ non_hoisted_function_after_return_2a_strict: {
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:8,16]",
         "WARN: Dropping unused variable a [test/compress/issue-1034.js:5,20]",
         "WARN: Dropping unused function nope [test/compress/issue-1034.js:12,21]",
-        "WARN: pass 0: last_count: Infinity, count: 48",
+        "INFO: pass 0: last_count: Infinity, count: 48",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:10,12]",
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:10,12]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:13,12]",
-        "WARN: Dropping unused variable b [test/compress/issue-1034.js:8,20]",
-        "WARN: Dropping unused variable c [test/compress/issue-1034.js:10,16]",
-        "WARN: pass 1: last_count: 48, count: 29",
+        "INFO: Dropping unused variable b [test/compress/issue-1034.js:8,20]",
+        "INFO: Dropping unused variable c [test/compress/issue-1034.js:10,16]",
+        "INFO: pass 1: last_count: 48, count: 29",
     ]
 }
 

test/compress/issue-1609.js

@@ -52,3 +52,30 @@ chained_evaluation_2: {
         })();
     }
 }
+
+chained_evaluation_3: {
+    options = {
+        collapse_vars: true,
+        evaluate: 10,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a = "long piece of string";
+            (function() {
+                var b = a, c;
+                c = f(b);
+                c.bar = b;
+            })();
+        })();
+    }
+    expect: {
+        (function() {
+            (function() {
+                f("long piece of string").bar = "long piece of string";
+            })();
+        })();
+    }
+}

test/compress/issue-1639.js

@@ -1,4 +1,3 @@
-
 issue_1639_1: {
     options = {
         booleans: true,
@@ -12,7 +11,6 @@ issue_1639_1: {
     }
     input: {
         var a = 100, b = 10;
-
         var L1 = 5;
         while (--L1 > 0) {
             if ((--b), false) {
@@ -21,7 +19,6 @@ issue_1639_1: {
                 }
             }
         }
-
         console.log(a, b);
     }
     expect: {
@@ -29,7 +26,7 @@ issue_1639_1: {
             if (--b, 0) var ignore = 0;
         console.log(a, b);
     }
-    expect_stdout: true
+    expect_stdout: "100 6"
 }
 
 issue_1639_2: {
@@ -44,25 +41,23 @@ issue_1639_2: {
     }
     input: {
         var a = 100, b = 10;
-
         function f19() {
             if (++a, false)
                 if (a)
                     if (++a);
         }
         f19();
-
         console.log(a, b);
     }
     expect: {
         var a = 100, b = 10;
         function f19() {
-            ++a, 0;
+            ++a, 1;
         }
         f19(),
         console.log(a, b);
     }
-    expect_stdout: true
+    expect_stdout: "101 10"
 }
 
 issue_1639_3: {
@@ -84,5 +79,5 @@ issue_1639_3: {
         a++,
         console.log(a, b);
     }
-    expect_stdout: true
+    expect_stdout: "101 10"
 }

test/compress/issue-1704.js

@@ -366,7 +366,7 @@ mangle_catch_redef_3: {
         console.log(o);
     }
     expect_exact: 'var o="PASS";try{throw 0}catch(o){(function(){function c(){o="FAIL"}c(),c()})()}console.log(o);'
-    expect_stdout: "PASS"
+    expect_stdout: true
 }
 
 mangle_catch_redef_3_toplevel: {
@@ -389,10 +389,10 @@ mangle_catch_redef_3_toplevel: {
         console.log(o);
     }
     expect_exact: 'var c="PASS";try{throw 0}catch(c){(function(){function o(){c="FAIL"}o(),o()})()}console.log(c);'
-    expect_stdout: "PASS"
+    expect_stdout: true
 }
 
-mangle_catch_redef_ie8_3: {
+mangle_catch_redef_3_ie8: {
     mangle = {
         ie8: true,
         toplevel: false,
@@ -412,7 +412,7 @@ mangle_catch_redef_ie8_3: {
         console.log(o);
     }
     expect_exact: 'var o="PASS";try{throw 0}catch(o){(function(){function c(){o="FAIL"}c(),c()})()}console.log(o);'
-    expect_stdout: "PASS"
+    expect_stdout: true
 }
 
 mangle_catch_redef_3_ie8_toplevel: {
@@ -435,5 +435,5 @@ mangle_catch_redef_3_ie8_toplevel: {
         console.log(o);
     }
     expect_exact: 'var c="PASS";try{throw 0}catch(c){(function(){function o(){c="FAIL"}o(),o()})()}console.log(c);'
-    expect_stdout: "PASS"
+    expect_stdout: true
 }

test/compress/issue-1770.js

@@ -46,7 +46,7 @@ mangle_props: {
             obj[1/0],
             obj["Infinity"],
             obj[-1/0],
-            obj[-1/0],
+            obj[-(1/0)],
             obj["-Infinity"],
             obj[null],
             obj["null"]

test/compress/issue-269.js

@@ -1,98 +1,111 @@
 issue_269_1: {
-	options = {
+    options = {
         unsafe: true,
     }
-	input: {
-		f(
-			String(x),
-			Number(x),
-			Boolean(x),
+    input: {
+        var x = {};
+        console.log(
+            String(x),
+            Number(x),
+            Boolean(x),
 
-			String(),
-			Number(),
-			Boolean()
-		);
-	}
-	expect: {
-		f(
-			x + '', +x, !!x,
-			'', 0, false
-		);
-	}
+            String(),
+            Number(),
+            Boolean()
+        );
+    }
+    expect: {
+        var x = {};
+        console.log(
+            x + "", +x, !!x,
+            "", 0, false
+        );
+    }
+    expect_stdout: true
 }
 
 issue_269_dangers: {
-	options = {
+    options = {
         unsafe: true,
     }
-	input: {
-		f(
-			String(x, x),
-			Number(x, x),
-			Boolean(x, x)
-		);
-	}
-	expect: {
-		f(String(x, x), Number(x, x), Boolean(x, x));
-	}
+    input: {
+        var x = {};
+        console.log(
+            String(x, x),
+            Number(x, x),
+            Boolean(x, x)
+        );
+    }
+    expect: {
+        var x = {};
+        console.log(String(x, x), Number(x, x), Boolean(x, x));
+    }
+    expect_stdout: true
 }
 
 issue_269_in_scope: {
-	options = {
+    options = {
         unsafe: true,
     }
-	input: {
-		var String, Number, Boolean;
-		f(
-			String(x),
-			Number(x, x),
-			Boolean(x)
-		);
-	}
-	expect: {
-		var String, Number, Boolean;
-		f(String(x), Number(x, x), Boolean(x));
-	}
+    input: {
+        var String, Number, Boolean;
+        var x = {};
+        console.log(
+            String(x),
+            Number(x, x),
+            Boolean(x)
+        );
+    }
+    expect: {
+        var String, Number, Boolean;
+        var x = {};
+        console.log(String(x), Number(x, x), Boolean(x));
+    }
+    expect_stdout: true
 }
 
 strings_concat: {
-	options = {
+    options = {
+        strings: true,
         unsafe: true,
     }
-	input: {
-		f(
-			String(x + 'str'),
-			String('str' + x)
-		);
-	}
-	expect: {
-		f(
-			x + 'str',
-			'str' + x
-		);
-	}
+    input: {
+        var x = {};
+        console.log(
+            String(x + "str"),
+            String("str" + x)
+        );
+    }
+    expect: {
+        var x = {};
+        console.log(
+            x + "str",
+            "str" + x
+        );
+    }
+    expect_stdout: true
 }
 
 regexp: {
-	options = {
+    options = {
         evaluate: true,
         unsafe: true,
     }
-	input: {
-		RegExp("foo");
-		RegExp("bar", "ig");
-		RegExp(foo);
-		RegExp("bar", ig);
-		RegExp("should", "fail");
-	}
-	expect: {
-		/foo/;
-		/bar/ig;
-		RegExp(foo);
-		RegExp("bar", ig);
-		RegExp("should", "fail");
-	}
-	expect_warnings: [
-		'WARN: Error converting RegExp("should","fail") [test/compress/issue-269.js:5,2]',
-	]
+    input: {
+        RegExp("foo");
+        RegExp("bar", "ig");
+        RegExp(foo);
+        RegExp("bar", ig);
+        RegExp("should", "fail");
+    }
+    expect: {
+        /foo/;
+        /bar/ig;
+        RegExp(foo);
+        RegExp("bar", ig);
+        RegExp("should", "fail");
+    }
+    expect_warnings: [
+        'WARN: Error converting RegExp("should","fail") [test/compress/issue-269.js:5,8]',
+    ]
 }

test/compress/issue-2719.js

@@ -26,7 +26,7 @@ warn: {
         }().length);
     }
     expect_warnings: [
-        "WARN: Function.protoype.caller not supported [test/compress/issue-2719.js:5,19]",
-        "WARN: Function.protoype.arguments not supported [test/compress/issue-2719.js:5,19]",
+        "WARN: Function.prototype.caller not supported [test/compress/issue-2719.js:5,19]",
+        "WARN: Function.prototype.arguments not supported [test/compress/issue-2719.js:5,19]",
     ]
 }

test/compress/issue-640.js

@@ -21,7 +21,7 @@ cond_5: {
         }
     }
     expect: {
-        some_condition() && some_other_condition() ? do_something() : alternate();
+        (some_condition() && some_other_condition() ? do_something : alternate)();
         if (some_condition() && some_other_condition()) do_something();
     }
 }

test/compress/loops.js

@@ -6,7 +6,7 @@ while_becomes_for: {
         while (foo()) bar();
     }
     expect: {
-        for (; foo(); ) bar();
+        for (;foo();) bar();
     }
 }
 
@@ -19,7 +19,7 @@ drop_if_break_1: {
             if (foo()) break;
     }
     expect: {
-        for (; !foo(););
+        for (;!foo(););
     }
 }
 
@@ -32,7 +32,7 @@ drop_if_break_2: {
             if (foo()) break;
     }
     expect: {
-        for (; bar() && !foo(););
+        for (;bar() && !foo(););
     }
 }
 
@@ -70,7 +70,7 @@ drop_if_break_4: {
         }
     }
     expect: {
-        for (; bar() && (x(), y(), !foo());) z(), k();
+        for (;bar() && (x(), y(), !foo());) z(), k();
     }
 }
 
@@ -82,7 +82,7 @@ drop_if_else_break_1: {
         for (;;) if (foo()) bar(); else break;
     }
     expect: {
-        for (; foo(); ) bar();
+        for (;foo();) bar();
     }
 }
 
@@ -97,7 +97,7 @@ drop_if_else_break_2: {
         }
     }
     expect: {
-        for (; bar() && foo();) baz();
+        for (;bar() && foo();) baz();
     }
 }
 
@@ -114,7 +114,7 @@ drop_if_else_break_3: {
         }
     }
     expect: {
-        for (; bar() && foo();) {
+        for (;bar() && foo();) {
             baz();
             stuff1();
             stuff2();
@@ -138,7 +138,7 @@ drop_if_else_break_4: {
         }
     }
     expect: {
-        for (; bar() && (x(), y(), foo());) baz(), z(), k();
+        for (;bar() && (x(), y(), foo());) baz(), z(), k();
     }
 }
 
@@ -523,13 +523,13 @@ issue_2740_1: {
         loops: true,
     }
     input: {
-        for (; ; ) break;
-        for (a(); ; ) break;
-        for (; b(); ) break;
-        for (c(); d(); ) break;
-        for (; ; e()) break;
-        for (f(); ; g()) break;
-        for (; h(); i()) break;
+        for (;;) break;
+        for (a();;) break;
+        for (;b();) break;
+        for (c(); d();) break;
+        for (;;e()) break;
+        for (f();; g()) break;
+        for (;h(); i()) break;
         for (j(); k(); l()) break;
     }
     expect: {
@@ -574,9 +574,11 @@ issue_2740_3: {
         console.log(x, y);
     }
     expect: {
-        L1: for (var x = 0; x < 3; x++)
-            for (var y = 0; y < 2; y++)
+        L1: for (var x = 0; x < 3; x++) {
+            var y = 0;
+            if (y < 2)
                 break L1;
+        }
         console.log(x, y);
     }
     expect_stdout: "0 0"
@@ -646,3 +648,282 @@ issue_2904: {
     }
     expect_stdout: "1"
 }
+
+issue_3371: {
+    options = {
+        functions: true,
+        join_vars: true,
+        loops: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var a = function() {
+                console.log("PASS");
+            };
+            while (a());
+        })();
+    }
+    expect: {
+        (function() {
+            function a() {
+                console.log("PASS");
+            }
+            for (;a(););
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+step: {
+    options = {
+        loops: true,
+        side_effects: true,
+    }
+    input: {
+        for (var i = 0; i < 42; "foo", i++, "bar");
+        console.log(i);
+    }
+    expect: {
+        for (var i = 0; i < 42; i++);
+        console.log(i);
+    }
+    expect_stdout: "42"
+}
+
+empty_for_in: {
+    options = {
+        loops: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        for (var a in [ 1, 2, 3 ]) {
+            var b = a + 1;
+        }
+    }
+    expect: {}
+    expect_warnings: [
+        "WARN: Dropping unused variable b [test/compress/loops.js:2,16]",
+        "INFO: Dropping unused loop variable a [test/compress/loops.js:1,17]",
+    ]
+}
+
+empty_for_in_used: {
+    options = {
+        loops: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        for (var a in [ 1, 2, 3 ]) {
+            var b = a + 1;
+        }
+        console.log(a);
+    }
+    expect: {
+        for (var a in [ 1, 2, 3 ]);
+        console.log(a);
+    }
+    expect_stdout: "2"
+    expect_warnings: [
+        "WARN: Dropping unused variable b [test/compress/loops.js:2,16]",
+    ]
+}
+
+empty_for_in_side_effects: {
+    options = {
+        loops: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        for (var a in {
+            foo: console.log("PASS")
+        }) {
+            var b = a + "bar";
+        }
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+    expect_warnings: [
+        "WARN: Dropping unused variable b [test/compress/loops.js:4,16]",
+        "INFO: Dropping unused loop variable a [test/compress/loops.js:1,17]",
+        "WARN: Side effects in object of for-in loop [test/compress/loops.js:1,17]",
+    ]
+}
+
+issue_3631_1: {
+    options = {
+        dead_code: true,
+        evaluate: true,
+        loops: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var c = 0;
+        L: do {
+            for (;;) continue L;
+            var b = 1;
+        } while (b && c++);
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        do {
+            var b;
+        } while (b && c++);
+        console.log(c);
+    }
+    expect_stdout: "0"
+}
+
+issue_3631_2: {
+    options = {
+        dead_code: true,
+        evaluate: true,
+        loops: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        L: for (var a = 1; a--; console.log(b)) {
+            for (;;) continue L;
+            var b = "FAIL";
+        }
+    }
+    expect: {
+        for (var a = 1; a--; console.log(b))
+            var b;
+    }
+    expect_stdout: "undefined"
+}
+
+loop_if_break: {
+    options = {
+        dead_code: true,
+        loops: true,
+    }
+    input: {
+        function f(a, b) {
+            try {
+                while (a) {
+                    if (b) {
+                        break;
+                        var c = 42;
+                        console.log(c);
+                    } else {
+                        var d = false;
+                        throw d;
+                    }
+                }
+            } catch (e) {
+                console.log("E:", e);
+            }
+            console.log(a, b, c, d);
+        }
+        f(0, 0);
+        f(0, 1);
+        f(1, 0);
+        f(1, 1);
+    }
+    expect: {
+        function f(a, b) {
+            try {
+                for (;a && !b;) {
+                    var d = false;
+                    throw d;
+                    var c;
+                }
+            } catch (e) {
+                console.log("E:", e);
+            }
+            console.log(a, b, c, d);
+        }
+        f(0, 0);
+        f(0, 1);
+        f(1, 0);
+        f(1, 1);
+    }
+    expect_stdout: [
+        "0 0 undefined undefined",
+        "0 1 undefined undefined",
+        "E: false",
+        "1 0 undefined false",
+        "1 1 undefined undefined",
+    ]
+}
+
+loop_return: {
+    options = {
+        dead_code: true,
+        loops: true,
+    }
+    input: {
+        function f(a) {
+            while (a) return 42;
+            return "foo";
+        }
+        console.log(f(0), f(1));
+    }
+    expect: {
+        function f(a) {
+            if (a) return 42;
+            return "foo";
+        }
+        console.log(f(0), f(1));
+    }
+    expect_stdout: "foo 42"
+}
+
+issue_3634_1: {
+    options = {
+        loops: true,
+    }
+    input: {
+        var b = 0;
+        L: while (++b < 2)
+            while (1)
+                if (b) break L;
+        console.log(b);
+    }
+    expect: {
+        var b = 0;
+        L: for (;++b < 2;)
+            for (;1;)
+                if (b) break L;
+        console.log(b);
+    }
+    expect_stdout: "1"
+}
+
+issue_3634_2: {
+    options = {
+        loops: true,
+    }
+    input: {
+        var b = 0;
+        L: while (++b < 2)
+            while (1)
+                if (!b)
+                    continue L;
+                else
+                    break L;
+        console.log(b);
+    }
+    expect: {
+        var b = 0;
+        L: for (;++b < 2;)
+            for (;1;)
+                if (!b)
+                    continue L;
+                else
+                    break L;
+        console.log(b);
+    }
+    expect_stdout: "1"
+}

test/compress/objects.js

@@ -0,0 +1,223 @@
+duplicate_key: {
+    options = {
+        objects: true,
+        side_effects: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+            a: 3,
+        };
+        for (var k in o)
+            console.log(k, o[k]);
+    }
+    expect: {
+        var o = {
+            a: 3,
+            b: 2,
+        };
+        for (var k in o)
+            console.log(k, o[k]);
+    }
+    expect_stdout: [
+        "a 3",
+        "b 2",
+    ]
+}
+
+duplicate_key_strict: {
+    options = {
+        objects: true,
+        side_effects: true,
+    }
+    input: {
+        "use strict";
+        var o = {
+            a: 1,
+            b: 2,
+            a: 3,
+        };
+        for (var k in o)
+            console.log(k, o[k]);
+    }
+    expect: {
+        "use strict";
+        var o = {
+            a: 1,
+            b: 2,
+            a: 3,
+        };
+        for (var k in o)
+            console.log(k, o[k]);
+    }
+    expect_stdout: true
+}
+
+duplicate_key_side_effect: {
+    options = {
+        objects: true,
+        side_effects: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: o = 2,
+            a: 3,
+        };
+        for (var k in o)
+            console.log(k, o[k]);
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: o = 2,
+            a: 3,
+        };
+        for (var k in o)
+            console.log(k, o[k]);
+    }
+    expect_stdout: [
+        "a 3",
+        "b 2",
+    ]
+}
+
+duplicate_key_with_accessor: {
+    options = {
+        objects: true,
+        side_effects: true,
+    }
+    input: {
+        [
+            {
+                a: 0,
+                b: 1,
+                a: 2,
+                set b(v) {},
+            },
+            {
+                a: 3,
+                b: 4,
+                get a() {
+                    return 5;
+                },
+                a: 6,
+                b: 7,
+                a: 8,
+                b: 9,
+            },
+        ].forEach(function(o) {
+            for (var k in o)
+                console.log(k, o[k]);
+        });
+    }
+    expect: {
+        [
+            {
+                a: 2,
+                b: 1,
+                set b(v) {},
+            },
+            {
+                a: 3,
+                b: 4,
+                get a() {
+                    return 5;
+                },
+                a: 8,
+                b: 9,
+            },
+        ].forEach(function(o) {
+            for (var k in o)
+                console.log(k, o[k]);
+        });
+    }
+    expect_stdout: true
+}
+
+unsafe_object_repeated: {
+    options = {
+        evaluate: true,
+        objects: true,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unsafe: true,
+    }
+    input: {
+        var o = { a: { b: 1 }, a: 1 };
+        console.log(
+            o + 1,
+            o.a + 1,
+            o.b + 1,
+            o.a.b + 1
+        );
+    }
+    expect: {
+        var o = { a: 1 };
+        console.log(
+            o + 1,
+            2,
+            o.b + 1,
+            NaN
+        );
+    }
+    expect_stdout: true
+}
+
+numeric_literal: {
+    options = {
+        objects: true,
+        side_effects: true,
+    }
+    mangle = {
+        properties: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        var obj = {
+            0: 0,
+            "-0": 1,
+            42: 2,
+            "42": 3,
+            0x25: 4,
+            "0x25": 5,
+            1E42: 6,
+            "1E42": 7,
+            "1e+42": 8,
+        };
+        console.log(obj[-0], obj[-""], obj["-0"]);
+        console.log(obj[42], obj["42"]);
+        console.log(obj[0x25], obj["0x25"], obj[37], obj["37"]);
+        console.log(obj[1E42], obj["1E42"], obj["1e+42"]);
+    }
+    expect_exact: [
+        'var obj = {',
+        '    0: 0,',
+        '    "-0": 1,',
+        '    42: 3,',
+        '    37: 4,',
+        '    o: 5,',
+        '    1e42: 8,',
+        '    b: 7',
+        '};',
+        '',
+        'console.log(obj[-0], obj[-""], obj["-0"]);',
+        '',
+        'console.log(obj[42], obj["42"]);',
+        '',
+        'console.log(obj[37], obj["o"], obj[37], obj["37"]);',
+        '',
+        'console.log(obj[1e42], obj["b"], obj["1e+42"]);',
+    ]
+    expect_stdout: [
+        "0 0 1",
+        "3 3",
+        "4 5 4 4",
+        "8 7 8",
+    ]
+}

test/compress/properties.js

@@ -817,6 +817,29 @@ issue_2208_5: {
     expect_stdout: "42"
 }
 
+issue_2208_6: {
+    options = {
+        inline: true,
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        a = 42;
+        console.log(("FAIL", {
+            p: function() {
+                return this.a;
+            }
+        }.p)());
+    }
+    expect: {
+        a = 42;
+        console.log(function() {
+            return this.a;
+        }());
+    }
+    expect_stdout: "42"
+}
+
 issue_2256: {
     options = {
         side_effects: true,
@@ -1862,3 +1885,29 @@ join_expr: {
     }
     expect_stdout: "PASS"
 }
+
+issue_3389: {
+    options = {
+        evaluate: true,
+        properties: true,
+        reduce_vars: true,
+        unsafe: true,
+    }
+    input: {
+        (function() {
+            var a = "PASS";
+            if (delete b)
+                b = a[null] = 42;
+            console.log(a);
+        })();
+    }
+    expect: {
+        (function() {
+            var a = "PASS";
+            if (delete b)
+                b = a.null = 42;
+            console.log(a);
+        })();
+    }
+    expect_stdout: "PASS"
+}

test/compress/pure_funcs.js

@@ -642,3 +642,41 @@ issue_3065_4: {
         })();
     }
 }
+
+issue_3325_1: {
+    options = {
+        pure_funcs: "cb",
+        side_effects: true,
+    }
+    input: {
+        function cb() {
+            console.log("PASS");
+        }
+        cb();
+    }
+    expect: {
+        function cb() {
+            console.log("PASS");
+        }
+    }
+}
+
+issue_3325_2: {
+    options = {
+        pure_funcs: "xxxcbxxx",
+        side_effects: true,
+    }
+    input: {
+        function cb() {
+            console.log("PASS");
+        }
+        cb();
+    }
+    expect: {
+        function cb() {
+            console.log("PASS");
+        }
+        cb();
+    }
+    expect_stdout: "PASS"
+}

test/compress/pure_getters.js

@@ -1161,3 +1161,51 @@ collapse_rhs_lhs: {
     }
     expect_stdout: "1 3"
 }
+
+drop_arguments: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+    }
+    input: {
+        (function() {
+            arguments.slice = function() {
+                console.log("PASS");
+            };
+            arguments[42];
+            arguments.length;
+            arguments.slice();
+        })();
+    }
+    expect: {
+        (function() {
+            arguments.slice = function() {
+                console.log("PASS");
+            };
+            arguments.slice();
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3427: {
+    options = {
+        assignments: true,
+        collapse_vars: true,
+        inline: true,
+        passes: 2,
+        pure_getters: "strict",
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        (function(b) {
+            b.p = 42;
+        })(a || (a = {}));
+    }
+    expect: {}
+    expect_stdout: true
+}

test/compress/reduce_vars.js

@@ -192,38 +192,35 @@ unsafe_evaluate: {
         unused: true,
     }
     input: {
-        function f0(){
-            var a = {
-                b:1
-            };
+        function f0() {
+            var a = { b: 1 };
             console.log(a.b + 3);
         }
-
-        function f1(){
+        function f1() {
             var a = {
-                b:{
-                    c:1
-                },
-                d:2
+                b: { c: 1 },
+                d: 2
             };
             console.log(a.b + 3, a.d + 4, a.b.c + 5, a.d.c + 6);
         }
+        f0();
+        f1();
     }
     expect: {
-        function f0(){
+        function f0() {
             console.log(4);
         }
-
-        function f1(){
+        function f1() {
             var a = {
-                b:{
-                    c:1
-                },
-                d:2
+                b: { c: 1 },
+                d: 2
             };
-            console.log(a.b + 3, 6, 6, 2..c + 6);
+            console.log(a.b + 3, 6, 6, NaN);
         }
+        f0();
+        f1();
     }
+    expect_stdout: true
 }
 
 unsafe_evaluate_side_effect_free_1: {
@@ -281,8 +278,8 @@ unsafe_evaluate_escaped: {
         console.log(function(){ var o={p:3},a=[o]; console.log(a[0].p++); return o.p; }());
     }
     expect: {
-        console.log(function(){ var o={p:1}; console.log(o, o.p); return o.p; }());
-        console.log(function(){ var o={p:2}; console.log(o.p, o); return o.p; }());
+        console.log(function(){ var o={p:1}; console.log(o, 1); return o.p; }());
+        console.log(function(){ var o={p:2}; console.log(2, o); return o.p; }());
         console.log(function(){ var o={p:3},a=[o]; console.log(a[0].p++); return o.p; }());
     }
     expect_stdout: true
@@ -1430,13 +1427,13 @@ defun_inline_3: {
 
 defun_call: {
     options = {
-        inline: true,
+        evaluate: true,
         reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
     input: {
-        function f() {
+        console.log(function f() {
             return g() + h(1) - h(g(), 2, 3);
             function g() {
                 return 4;
@@ -1444,21 +1441,17 @@ defun_call: {
             function h(a) {
                 return a;
             }
-        }
+        }());
     }
     expect: {
-        function f() {
-            return 4 + h(1) - h(4);
-            function h(a) {
-                return a;
-            }
-        }
+        console.log(1);
     }
+    expect_stdout: "1"
 }
 
 defun_redefine: {
     options = {
-        inline: true,
+        evaluate: true,
         reduce_funcs: true,
         reduce_vars: true,
         unused: true,
@@ -1483,7 +1476,7 @@ defun_redefine: {
             (function() {
                 return 3;
             });
-            return 3 + 2;
+            return 5;
         }
         console.log(f());
     }
@@ -1520,7 +1513,7 @@ func_inline: {
 
 func_modified: {
     options = {
-        inline: true,
+        evaluate: true,
         reduce_funcs: true,
         reduce_vars: true,
         unused: true,
@@ -1553,7 +1546,7 @@ func_modified: {
             (function() {
                 return 4;
             });
-            return 1 + 2 + 4;
+            return 7;
         }
         console.log(f());
     }
@@ -2078,13 +2071,8 @@ issue_1670_6: {
     }
     expect: {
         (function(a) {
-            switch (1) {
-              case a = 1:
-                console.log(a);
-                break;
-              default:
-                console.log(2);
-            }
+            a = 1;
+            console.log(a);
         })(1);
     }
     expect_stdout: "1"
@@ -2740,18 +2728,18 @@ issue_1814_2: {
         !function() {
             var b = a + 1;
             !function(a) {
-                console.log(a++, b);
+                console.log(b, a++);
             }(0);
         }();
     }
     expect: {
         !function() {
             !function(a) {
-                console.log(a++, "321");
+                console.log("321", a++);
             }(0);
         }();
     }
-    expect_stdout: "0 '321'"
+    expect_stdout: "321 0"
 }
 
 try_abort: {
@@ -4950,7 +4938,7 @@ defun_single_use_loop: {
         unused: true,
     }
     input: {
-        for (var x, i = 2; --i >= 0; ) {
+        for (var x, i = 2; --i >= 0;) {
             var y = x;
             x = f;
             console.log(x === y);
@@ -4958,7 +4946,7 @@ defun_single_use_loop: {
         function f() {};
     }
     expect: {
-        for (var x, i = 2; --i >= 0; ) {
+        for (var x, i = 2; --i >= 0;) {
             var y = x;
             x = f;
             console.log(x === y);
@@ -5354,6 +5342,7 @@ issue_2774: {
 
 issue_2799_1: {
     options = {
+        passes: 2,
         reduce_funcs: true,
         reduce_vars: true,
         unused: true,
@@ -5518,9 +5507,7 @@ issue_2860_1: {
         }());
     }
     expect: {
-        console.log(function(a) {
-            return 1 ^ a;
-        }());
+        console.log(1);
     }
     expect_stdout: "1"
 }
@@ -6429,3 +6416,460 @@ issue_3140_5: {
     }
     expect_stdout: "1"
 }
+
+issue_3240_1: {
+    options = {
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f(1);
+            function f(a) {
+                console.log(a);
+                var g = function() {
+                    f(a - 1);
+                };
+                if (a) g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(a) {
+                console.log(a);
+                var g = function() {
+                    f(a - 1);
+                };
+                if (a) g();
+            })(1);
+        })();
+    }
+    expect_stdout: [
+        "1",
+        "0",
+    ]
+}
+
+issue_3240_2: {
+    options = {
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f(1);
+            function f(a) {
+                console.log(a);
+                var g = function() {
+                    f(a - 1);
+                };
+                if (a) g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(a) {
+                console.log(a);
+                if (a) (function() {
+                    f(a - 1);
+                })();
+            })(1);
+        })();
+    }
+    expect_stdout: [
+        "1",
+        "0",
+    ]
+}
+
+issue_3240_3: {
+    options = {
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f();
+            function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                var g = function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                };
+                g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                var g = function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                };
+                g();
+            })();
+        })();
+    }
+    expect_stdout: [
+        "0",
+        "1",
+    ]
+}
+
+issue_3240_4: {
+    options = {
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            f();
+            function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                var g = function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                };
+                g();
+            }
+        })();
+    }
+    expect: {
+        (function() {
+            (function f(b) {
+                if (!f.a) f.a = 0;
+                console.log(f.a.toString());
+                (function() {
+                    (b ? function() {} : function() {
+                        f.a++;
+                        f(1);
+                    })();
+                })();
+            })();
+        })();
+    }
+    expect_stdout: [
+        "0",
+        "1",
+    ]
+}
+
+issues_3267_1: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function(x) {
+            x();
+        })(function() {
+            (function(i) {
+                if (i)
+                    return console.log("PASS");
+                throw "FAIL";
+            })(Object());
+        });
+    }
+    expect: {
+        !function(i) {
+            if (Object())
+                return console.log("PASS");
+            throw "FAIL";
+        }();
+    }
+    expect_stdout: "PASS"
+}
+
+issues_3267_2: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        keep_fargs: false,
+        passes: 2,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        (function(x) {
+            x();
+        })(function() {
+            (function(i) {
+                if (i)
+                    return console.log("PASS");
+                throw "FAIL";
+            })(Object());
+        });
+    }
+    expect: {
+        !function() {
+            if (Object())
+                return console.log("PASS");
+            throw "FAIL";
+        }();
+    }
+    expect_stdout: "PASS"
+}
+
+issues_3267_3: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        keep_fargs: false,
+        passes: 2,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        (function(x) {
+            x();
+        })(function() {
+            (function(i) {
+                if (i)
+                    return console.log("PASS");
+                throw "FAIL";
+            })(Object());
+        });
+    }
+    expect: {
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3297: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            function f() {
+                var a;
+                var b = function a() {
+                    console.log(a === b) && f();
+                };
+                b();
+            }
+            f();
+        })();
+    }
+    expect: {
+        (function() {
+            (function f() {
+                var b = function a() {
+                    console.log(a === b) && f();
+                };
+                b();
+            })();
+        })();
+    }
+    expect_stdout: "true"
+}
+
+drop_side_effect_free: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var a = 123;
+        "" + (a && (a.b = 0) || a);
+        console.log(a);
+    }
+    expect: {
+        var a = 123;
+        a.b = 0;
+        console.log(a);
+    }
+    expect_stdout: "123"
+}
+
+issue_3377: {
+    options = {
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        console.log(function f() {
+            return f[0], (f = 42);
+        }());
+    }
+    expect: {
+        console.log(function f() {
+            return f[0], (f = 42);
+        }());
+    }
+    expect_stdout: "42"
+}
+
+issue_3509: {
+    options = {
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function a() {
+            console.log("PASS");
+        }
+        try {
+        } catch (a) {
+            var a;
+        }
+        a();
+    }
+    expect: {
+        try {
+        } catch (a) {
+            var a;
+        }
+        (function() {
+            console.log("PASS");
+        })();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3622: {
+    options = {
+        evaluate: true,
+        inline: true,
+        keep_fargs: "strict",
+        reduce_vars: true,
+        sequences: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var c = "FAIL";
+        !function(b, a) {
+            a && (c = "PASS");
+        }(42, this);
+        console.log(c);
+    }
+    expect: {
+        var c = "FAIL";
+        var a;
+        a = this,
+        !void (a && (c = "PASS")),
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3631_1: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var c = 0;
+        L: do {
+            for (;;) continue L;
+            var b = 1;
+        } while (b && c++);
+        console.log(c);
+    }
+    expect: {
+        var c = 0;
+        L: do {
+            for (;;) continue L;
+            var b = 1;
+        } while (b && c++);
+        console.log(c);
+    }
+    expect_stdout: "0"
+}
+
+issue_3631_2: {
+    options = {
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        L: for (var a = 1; a--; console.log(b)) {
+            for (;;) continue L;
+            var b = "FAIL";
+        }
+    }
+    expect: {
+        L: for (var a = 1; a--; console.log(b)) {
+            for (;;) continue L;
+            var b = "FAIL";
+        }
+    }
+    expect_stdout: "undefined"
+}
+
+issue_3666: {
+    options = {
+        collapse_vars: true,
+        passes: 2,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        try {
+            var a = "FAIL";
+        } finally {
+            for (;!a;)
+                var c = a++;
+            var a = "PASS", b = c = "PASS";
+        }
+        console.log(a, b);
+    }
+    expect: {
+        try {
+            var a = "FAIL";
+        } finally {
+            for (;!a;)
+                a++;
+            var b = a = "PASS";
+        }
+        console.log(a, b);
+    }
+    expect_stdout: "PASS PASS"
+}

test/compress/regexp.js

@@ -35,3 +35,223 @@ regexp_2: {
     }
     expect_stdout: '["PASS","pass"]'
 }
+
+regexp_properties: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(/abc/g.source, /abc/g.global, /abc/g.ignoreCase, /abc/g.lastIndex, /abc/g.multiline);
+    }
+    expect: {
+        console.log("abc", true, false, /abc/g.lastIndex, false);
+    }
+    expect_stdout: "abc true false 0 false"
+}
+
+issue_3434_1: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        var o = {
+            "\n": RegExp("\n"),
+            "\r": RegExp("\r"),
+            "\t": RegExp("\t"),
+            "\b": RegExp("\b"),
+            "\f": RegExp("\f"),
+            "\0": RegExp("\0"),
+            "\x0B": RegExp("\x0B"),
+            "\u2028": RegExp("\u2028"),
+            "\u2029": RegExp("\u2029"),
+        };
+        for (var c in o)
+            console.log(o[c].test("\\"), o[c].test(c));
+    }
+    expect_exact: [
+        "var o = {",
+        '    "\\n": /\\n/,',
+        '    "\\r": /\\r/,',
+        '    "\\t": /\t/,',
+        '    "\\b": /\b/,',
+        '    "\\f": /\f/,',
+        '    "\\0": /\0/,',
+        '    "\\v": /\v/,',
+        '    "\\u2028": /\\u2028/,',
+        '    "\\u2029": /\\u2029/',
+        "};",
+        "",
+        'for (var c in o) console.log(o[c].test("\\\\"), o[c].test(c));',
+    ]
+    expect_stdout: [
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+    ]
+}
+
+issue_3434_2: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    beautify = {
+        beautify: true,
+    }
+    input: {
+        var o = {
+            "\n": RegExp("\\\n"),
+            "\r": RegExp("\\\r"),
+            "\t": RegExp("\\\t"),
+            "\b": RegExp("\\\b"),
+            "\f": RegExp("\\\f"),
+            "\0": RegExp("\\\0"),
+            "\x0B": RegExp("\\\x0B"),
+            "\u2028": RegExp("\\\u2028"),
+            "\u2029": RegExp("\\\u2029"),
+        };
+        for (var c in o)
+            console.log(o[c].test("\\"), o[c].test(c));
+    }
+    expect_exact: [
+        "var o = {",
+        '    "\\n": /\\n/,',
+        '    "\\r": /\\r/,',
+        '    "\\t": /\t/,',
+        '    "\\b": /\b/,',
+        '    "\\f": /\f/,',
+        '    "\\0": /\0/,',
+        '    "\\v": /\v/,',
+        '    "\\u2028": /\\u2028/,',
+        '    "\\u2029": /\\u2029/',
+        "};",
+        "",
+        'for (var c in o) console.log(o[c].test("\\\\"), o[c].test(c));',
+    ]
+    expect_stdout: [
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+    ]
+}
+
+issue_3434_3: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        RegExp("\n");
+        RegExp("\r");
+        RegExp("\\n");
+        RegExp("\\\n");
+        RegExp("\\\\n");
+        RegExp("\\\\\n");
+        RegExp("\\\\\\n");
+        RegExp("\\\\\\\n");
+        RegExp("\u2028");
+        RegExp("\u2029");
+        RegExp("\n\r\u2028\u2029");
+        RegExp("\\\nfo\n[\n]o\\bbb");
+    }
+    expect: {
+        /\n/;
+        /\r/;
+        /\n/;
+        /\n/;
+        /\\n/;
+        /\\\n/;
+        /\\\n/;
+        /\\\n/;
+        /\u2028/;
+        /\u2029/;
+        /\n\r\u2028\u2029/;
+        /\nfo\n[\n]o\bbb/;
+    }
+}
+
+issue_3434_4: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        [
+            [ "", RegExp("") ],
+            [ "/", RegExp("/") ],
+            [ "//", RegExp("//") ],
+            [ "\/", RegExp("\\/") ],
+            [ "///", RegExp("///") ],
+            [ "/\/", RegExp("/\\/") ],
+            [ "\//", RegExp("\\//") ],
+            [ "\\/", RegExp("\\\\/") ],
+            [ "////", RegExp("////") ],
+            [ "//\/", RegExp("//\\/") ],
+            [ "/\//", RegExp("/\\//") ],
+            [ "/\\/", RegExp("/\\\\/") ],
+            [ "\///", RegExp("\\///") ],
+            [ "\/\/", RegExp("\\/\\/") ],
+            [ "\\//", RegExp("\\\\//") ],
+            [ "\\\/", RegExp("\\\\\\/") ],
+        ].forEach(function(test) {
+            console.log(test[1].test("\\"), test[1].test(test[0]));
+        });
+    }
+    expect: {
+        [
+            [ "", /(?:)/ ],
+            [ "/", /\// ],
+            [ "//", /\/\// ],
+            [ "/", /\// ],
+            [ "///", /\/\/\// ],
+            [ "//", /\/\// ],
+            [ "//", /\/\// ],
+            [ "\\/", /\\\// ],
+            [ "////", /\/\/\/\// ],
+            [ "///", /\/\/\// ],
+            [ "///", /\/\/\// ],
+            [ "/\\/", /\/\\\// ],
+            [ "///", /\/\/\// ],
+            [ "//", /\/\// ],
+            [ "\\//", /\\\/\// ],
+            [ "\\/", /\\\// ],
+        ].forEach(function(test) {
+            console.log(test[1].test("\\"), test[1].test(test[0]));
+        });
+    }
+    expect_stdout: [
+        "true true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+        "false true",
+    ]
+}

test/compress/rename.js

@@ -579,7 +579,7 @@ function_do_catch_ie8: {
         console.log(b, c);
     }
     expect: {
-        var t = 1, u = 1, y = 0;
+        var u = 1, y = 1, a = 0;
         function c(c) {
             var d;
             do {
@@ -587,7 +587,7 @@ function_do_catch_ie8: {
                     try {
                         var e = void 0;
                     } catch (i) {
-                        --t && w("ddddddddeeeeeeegggggggggiiiiilllllllnnnnntuuuuuuuuyyyyyyy");
+                        --u && w("ddddddddeeeeeeegggggggggiiiiilllllllnnnnntuuuuuuuuyyyyyyy");
                         0;
                         0;
                         0;
@@ -596,18 +596,146 @@ function_do_catch_ie8: {
                         d[1];
                     } catch (l) {
                         var g;
-                        switch(function x() {
-                            y++;
+                        switch (function n() {
+                            a++;
                         }()) {
-                          case e + --g:
+                        case e + --g:
                         }
                     }
-                } catch (n) {}
+                } catch (t) {}
             } while (--d);
-            u--;
+            y--;
         }
         c();
-        console.log(u, y);
+        console.log(y, a);
     }
     expect_stdout: "0 1"
 }
+
+issue_3480: {
+    rename = true,
+    mangle = {
+        ie8: false,
+        toplevel: false,
+    }
+    input: {
+        var d, a, b, c = "FAIL";
+        (function b() {
+            (function() {
+                try {
+                    c = "PASS";
+                } catch (b) {
+                }
+            })();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var d, a, b, c = "FAIL";
+        (function n() {
+            (function() {
+                try {
+                    c = "PASS";
+                } catch (c) {}
+            })();
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3480_ie8: {
+    rename = true,
+    mangle = {
+        ie8: true,
+        toplevel: false,
+    }
+    input: {
+        var d, a, b, c = "FAIL";
+        (function b() {
+            (function() {
+                try {
+                    c = "PASS";
+                } catch (b) {
+                }
+            })();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var d, a, b, c = "FAIL";
+        (function b() {
+            (function() {
+                try {
+                    c = "PASS";
+                } catch (b) {}
+            })();
+        })();
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3480_toplevel: {
+    rename = true,
+    mangle = {
+        ie8: false,
+        toplevel: true,
+    }
+    input: {
+        var d, a, b, c = "FAIL";
+        (function b() {
+            (function() {
+                try {
+                    c = "PASS";
+                } catch (b) {
+                }
+            })();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c, n, o, t = "FAIL";
+        (function c() {
+            (function() {
+                try {
+                    t = "PASS";
+                } catch (c) {}
+            })();
+        })();
+        console.log(t);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_3480_ie8_toplevel: {
+    rename = true,
+    mangle = {
+        ie8: true,
+        toplevel: true,
+    }
+    input: {
+        var d, a, b, c = "FAIL";
+        (function b() {
+            (function() {
+                try {
+                    c = "PASS";
+                } catch (b) {
+                }
+            })();
+        })();
+        console.log(c);
+    }
+    expect: {
+        var c, n, o, t = "FAIL";
+        (function o() {
+            (function() {
+                try {
+                    t = "PASS";
+                } catch (o) {}
+            })();
+        })();
+        console.log(t);
+    }
+    expect_stdout: "PASS"
+}

test/compress/sandbox.js

@@ -12,3 +12,71 @@ console_log: {
         "% %s",
     ]
 }
+
+typeof_arguments: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var arguments;
+        console.log((typeof arguments).length);
+    }
+    expect: {
+        var arguments;
+        console.log((typeof arguments).length);
+    }
+    expect_stdout: "6"
+}
+
+typeof_arguments_assigned: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var arguments = void 0;
+        console.log((typeof arguments).length);
+    }
+    expect: {
+        console.log("undefined".length);
+    }
+    expect_stdout: "9"
+}
+
+toplevel_Infinity_NaN_undefined: {
+    options = {
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var Infinity = "foo";
+        var NaN = 42;
+        var undefined = null;
+        console.log(Infinity, NaN, undefined);
+    }
+    expect: {
+        console.log("foo", 42, null);
+    }
+    expect_stdout: "foo 42 null"
+}
+
+log_global: {
+    input: {
+        console.log(function() {
+            return this;
+        }());
+    }
+    expect: {
+        console.log(function() {
+            return this;
+        }());
+    }
+    expect_stdout: "[object global]"
+}

test/compress/sequences.js

@@ -490,6 +490,7 @@ issue_1758: {
 delete_seq_1: {
     options = {
         booleans: true,
+        evaluate: true,
         side_effects: true,
     }
     input: {
@@ -514,6 +515,7 @@ delete_seq_1: {
 delete_seq_2: {
     options = {
         booleans: true,
+        evaluate: true,
         side_effects: true,
     }
     input: {
@@ -538,6 +540,7 @@ delete_seq_2: {
 delete_seq_3: {
     options = {
         booleans: true,
+        evaluate: true,
         keep_infinity: true,
         side_effects: true,
     }
@@ -563,6 +566,7 @@ delete_seq_3: {
 delete_seq_4: {
     options = {
         booleans: true,
+        evaluate: true,
         sequences: true,
         side_effects: true,
     }
@@ -590,6 +594,7 @@ delete_seq_4: {
 delete_seq_5: {
     options = {
         booleans: true,
+        evaluate: true,
         keep_infinity: true,
         sequences: true,
         side_effects: true,
@@ -618,6 +623,7 @@ delete_seq_5: {
 delete_seq_6: {
     options = {
         booleans: true,
+        evaluate: true,
         side_effects: true,
     }
     input: {
@@ -702,7 +708,7 @@ side_effects_cascade_3: {
     }
     expect: {
         function f(a, b) {
-            !(b += a) && ((b = a) || (b -= a, b ^= a)),
+            (b += a) || (b = a) || (b -= a, b ^= a),
             a--;
         }
     }
@@ -904,15 +910,23 @@ call: {
             console.log(this === b ? "bar" : "baz");
         };
         (a, b)();
+        (a, b).c();
         (a, b.c)();
+        (a, b)["c"]();
+        (a, b["c"])();
         (a, function() {
             console.log(this === a);
         })();
         new (a, b)();
+        new (a, b).c();
         new (a, b.c)();
+        new (a, b)["c"]();
+        new (a, b["c"])();
         new (a, function() {
             console.log(this === a);
         })();
+        console.log(typeof (a, b).c);
+        console.log(typeof (a, b)["c"]);
     }
     expect: {
         var a = function() {
@@ -924,23 +938,177 @@ call: {
         b.c = function() {
             console.log(this === b ? "bar" : "baz");
         },
-        a, b(),
+        b(),
+        b.c(),
         (a, b.c)(),
-        a, function() {
+        b["c"](),
+        (a, b["c"])(),
+        function() {
             console.log(this === a);
         }(),
-        a, new b(),
-        a, new b.c(),
-        a, new function() {
+        new b(),
+        new b.c(),
+        new b.c(),
+        new b["c"](),
+        new b["c"](),
+        new function() {
             console.log(this === a);
-        }();
+        }(),
+        console.log((a, typeof b.c)),
+        console.log((a, typeof b["c"]));
     }
     expect_stdout: [
         "foo",
+        "bar",
+        "baz",
+        "bar",
         "baz",
         "true",
         "foo",
         "baz",
+        "baz",
+        "baz",
+        "baz",
         "false",
+        "function",
+        "function",
     ]
 }
+
+missing_link: {
+    options = {
+        conditionals: true,
+        evaluate: true,
+        sequences: true,
+    }
+    input: {
+        var a = 100;
+        a;
+        a++ + (0 ? 2 : 1);
+        console.log(a);
+    }
+    expect: {
+        var a = 100;
+        a,
+        a++,
+        console.log(a);
+    }
+}
+
+angularjs_chain: {
+    options = {
+        conditionals: true,
+        sequences: true,
+        side_effects: true,
+    }
+    input: {
+        function nonComputedMember(left, right, context, create) {
+            var lhs = left();
+            if (create && create !== 1) {
+                if (lhs && lhs[right] == null) {
+                    lhs[right] = {};
+                }
+            }
+            var value = lhs != null ? lhs[right] : undefined;
+            if (context) {
+                return { context: lhs, name: right, value: value };
+            } else {
+                return value;
+            }
+        }
+    }
+    expect: {
+        function nonComputedMember(left, right, context, create) {
+            var lhs = left();
+            create && 1 !== create && lhs && null == lhs[right] && (lhs[right] = {});
+            var value = null != lhs ? lhs[right] : void 0;
+            return context ? {
+                context: lhs,
+                name: right,
+                value: value
+            } : value;
+        }
+    }
+}
+
+issue_3490_1: {
+    options = {
+        conditionals: true,
+        dead_code: true,
+        inline: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 42, c = "FAIL";
+        if ({
+            3: function() {
+                var a;
+                return (a && a.p) < this;
+            }(),
+        }) c = "PASS";
+        if (b) while ("" == typeof d);
+        console.log(c, b);
+    }
+    expect: {
+        var b = 42, c = "FAIL";
+        if (function() {
+            var a;
+            a && a.p;
+        }(), c = "PASS", b) while ("" == typeof d);
+        console.log(c, b);
+    }
+    expect_stdout: "PASS 42"
+}
+
+issue_3490_2: {
+    options = {
+        conditionals: true,
+        dead_code: true,
+        evaluate: true,
+        inline: true,
+        reduce_vars: true,
+        sequences: true,
+        side_effects: true,
+        toplevel: true,
+    }
+    input: {
+        var b = 42, c = "FAIL";
+        if ({
+            3: function() {
+                var a;
+                return (a && a.p) < this;
+            }(),
+        }) c = "PASS";
+        if (b) for (; "" == typeof d;);
+        console.log(c, b);
+    }
+    expect: {
+        var b = 42, c = "FAIL";
+        for (function() {
+            var a;
+        }(), c = "PASS", b; "" == typeof d;);
+        console.log(c, b);
+    }
+    expect_stdout: "PASS 42"
+}
+
+issue_3703: {
+    options = {
+        evaluate: true,
+        sequences: true,
+        unsafe: true,
+    }
+    input: {
+        var a = "FAIL";
+        while ((a = "PASS", 0).foo = 0);
+        console.log(a);
+    }
+    expect: {
+        var a = "FAIL";
+        while (a = "PASS", (0).foo = 0);
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}

test/compress/side_effects.js

@@ -0,0 +1,277 @@
+accessor: {
+    options = {
+        side_effects: true,
+    }
+    input: {
+        ({
+            get a() {},
+            set a(v){
+                this.b = 2;
+            },
+            b: 1
+        });
+    }
+    expect: {}
+}
+
+issue_2233_1: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        Array.isArray;
+        Boolean;
+        console.log;
+        Date;
+        decodeURI;
+        decodeURIComponent;
+        encodeURI;
+        encodeURIComponent;
+        Error.name;
+        escape;
+        eval;
+        EvalError;
+        Function.length;
+        isFinite;
+        isNaN;
+        JSON;
+        Math.random;
+        Number.isNaN;
+        parseFloat;
+        parseInt;
+        RegExp;
+        Object.defineProperty;
+        String.fromCharCode;
+        RangeError;
+        ReferenceError;
+        SyntaxError;
+        TypeError;
+        unescape;
+        URIError;
+    }
+    expect: {}
+    expect_stdout: true
+}
+
+global_timeout_and_interval_symbols: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        // These global symbols do not exist in the test sandbox
+        // and must be tested separately.
+        clearInterval;
+        clearTimeout;
+        setInterval;
+        setTimeout;
+    }
+    expect: {}
+}
+
+issue_2233_2: {
+    options = {
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var RegExp;
+        Array.isArray;
+        RegExp;
+        UndeclaredGlobal;
+        function foo() {
+            var Number;
+            AnotherUndeclaredGlobal;
+            Math.sin;
+            Number.isNaN;
+        }
+    }
+    expect: {
+        var RegExp;
+        UndeclaredGlobal;
+        function foo() {
+            var Number;
+            AnotherUndeclaredGlobal;
+            Number.isNaN;
+        }
+    }
+}
+
+issue_2233_3: {
+    options = {
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        var RegExp;
+        Array.isArray;
+        RegExp;
+        UndeclaredGlobal;
+        function foo() {
+            var Number;
+            AnotherUndeclaredGlobal;
+            Math.sin;
+            Number.isNaN;
+        }
+    }
+    expect: {
+        UndeclaredGlobal;
+    }
+}
+
+global_fns: {
+    options = {
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        Boolean(1, 2);
+        decodeURI(1, 2);
+        decodeURIComponent(1, 2);
+        Date(1, 2);
+        encodeURI(1, 2);
+        encodeURIComponent(1, 2);
+        Error(1, 2);
+        escape(1, 2);
+        EvalError(1, 2);
+        isFinite(1, 2);
+        isNaN(1, 2);
+        Number(1, 2);
+        Object(1, 2);
+        parseFloat(1, 2);
+        parseInt(1, 2);
+        RangeError(1, 2);
+        ReferenceError(1, 2);
+        String(1, 2);
+        SyntaxError(1, 2);
+        TypeError(1, 2);
+        unescape(1, 2);
+        URIError(1, 2);
+        try {
+            Function(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            RegExp(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            Array(NaN);
+        } catch (e) {
+            console.log(e.name);
+        }
+    }
+    expect: {
+        try {
+            Function(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            RegExp(1, 2);
+        } catch (e) {
+            console.log(e.name);
+        }
+        try {
+            Array(NaN);
+        } catch (e) {
+            console.log(e.name);
+        }
+    }
+    expect_stdout: [
+        "SyntaxError",
+        "SyntaxError",
+        "RangeError",
+    ]
+}
+
+unsafe_builtin_1: {
+    options = {
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        (!w).constructor(x);
+        Math.abs(y);
+        [ 1, 2, z ].valueOf();
+    }
+    expect: {
+        w, x;
+        y;
+        z;
+    }
+}
+
+unsafe_builtin_2: {
+    options = {
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        var o = {};
+        constructor.call(o, 42);
+        __defineGetter__.call(o, "foo", function() {
+            return o.p;
+        });
+        __defineSetter__.call(o, void 0, function(a) {
+            o.p = a;
+        });
+        console.log(typeof o, o.undefined = "PASS", o.foo);
+    }
+    expect: {
+        var o = {};
+        constructor.call(o, 42);
+        __defineGetter__.call(o, "foo", function() {
+            return o.p;
+        });
+        __defineSetter__.call(o, void 0, function(a) {
+            o.p = a;
+        });
+        console.log(typeof o, o.undefined = "PASS", o.foo);
+    }
+    expect_stdout: "object PASS PASS"
+}
+
+unsafe_string_replace: {
+    options = {
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        "foo".replace("f", function() {
+            console.log("PASS");
+        });
+    }
+    expect: {
+        "foo".replace("f", function() {
+            console.log("PASS");
+        });
+    }
+    expect_stdout: "PASS"
+}
+
+drop_value: {
+    options = {
+        side_effects: true,
+    }
+    input: {
+        (1, [2, foo()], 3, {a:1, b:bar()});
+    }
+    expect: {
+        foo(), bar();
+    }
+}

test/compress/switch.js

@@ -261,13 +261,13 @@ drop_default_1: {
     }
     input: {
         switch (foo) {
-          case 'bar': baz();
+          case "bar": baz();
           default:
         }
     }
     expect: {
         switch (foo) {
-          case 'bar': baz();
+          case "bar": baz();
         }
     }
 }
@@ -279,14 +279,14 @@ drop_default_2: {
     }
     input: {
         switch (foo) {
-          case 'bar': baz(); break;
+          case "bar": baz(); break;
           default:
             break;
         }
     }
     expect: {
         switch (foo) {
-          case 'bar': baz();
+          case "bar": baz();
         }
     }
 }
@@ -298,7 +298,7 @@ keep_default: {
     }
     input: {
         switch (foo) {
-          case 'bar': baz();
+          case "bar": baz();
           default:
             something();
             break;
@@ -306,7 +306,7 @@ keep_default: {
     }
     expect: {
         switch (foo) {
-          case 'bar': baz();
+          case "bar": baz();
           default:
             something();
         }
@@ -347,25 +347,103 @@ issue_1663: {
     expect_stdout: true
 }
 
-drop_case: {
+drop_case_1: {
     options = {
         dead_code: true,
         switches: true,
     }
     input: {
         switch (foo) {
-          case 'bar': baz(); break;
-          case 'moo':
+          case "bar": baz(); break;
+          case "moo":
             break;
         }
     }
     expect: {
         switch (foo) {
-          case 'bar': baz();
+          case "bar": baz();
         }
     }
 }
 
+drop_case_2: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        switch (foo) {
+          case "bar":
+            bar();
+            break;
+          default:
+          case "moo":
+            moo();
+            break;
+        }
+    }
+    expect: {
+        switch (foo) {
+          case "bar":
+            bar();
+            break;
+          default:
+            moo();
+        }
+    }
+}
+
+drop_case_3: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        var c = "PASS";
+        switch ({}.p) {
+          default:
+          case void 0:
+            break;
+          case c = "FAIL":
+        }
+        console.log(c);
+    }
+    expect: {
+        var c = "PASS";
+        switch ({}.p) {
+          default:
+          case void 0:
+            break;
+          case c = "FAIL":
+        }
+        console.log(c);
+    }
+    expect_stdout: "PASS"
+}
+
+drop_case_4: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        switch (0) {
+          case [ a, typeof b ]:
+          default:
+            var a;
+        }
+        console.log("PASS");
+    }
+    expect: {
+        switch (0) {
+          case [ a, typeof b ]:
+            var a;
+        }
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+}
+
 keep_case: {
     options = {
         dead_code: true,
@@ -373,14 +451,14 @@ keep_case: {
     }
     input: {
         switch (foo) {
-          case 'bar': baz(); break;
+          case "bar": baz(); break;
           case moo:
             break;
         }
     }
     expect: {
         switch (foo) {
-          case 'bar': baz(); break;
+          case "bar": baz(); break;
           case moo:
         }
     }
@@ -539,7 +617,7 @@ issue_1679: {
         f();
         console.log(a, b);
     }
-    expect_stdout: true
+    expect_stdout: "99 8"
 }
 
 issue_1680_1: {
@@ -864,3 +942,89 @@ issue_1750: {
     }
     expect_stdout: "0 2"
 }
+
+drop_switch_1: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        switch (foo) {
+          default:
+            break;
+          case "bar":
+            break;
+        }
+    }
+    expect: {
+        foo;
+    }
+}
+
+drop_switch_2: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        switch (foo) {
+          default:
+          case "bar":
+            baz();
+        }
+    }
+    expect: {
+        foo;
+        baz();
+    }
+}
+
+drop_switch_3: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        console.log(function() {
+            switch (0) {
+              default:
+                return "PASS";
+              case 1:
+            }
+        }());
+    }
+    expect: {
+        console.log(function() {
+            switch (0) {
+              default:
+                return "PASS";
+              case 1:
+            }
+        }());
+    }
+    expect_stdout: "PASS"
+}
+
+drop_switch_4: {
+    options = {
+        dead_code: true,
+        switches: true,
+    }
+    input: {
+        var a = "FAIL";
+        switch (0) {
+          default:
+          case a:
+            var b = a = "PASS";
+            break;
+        }
+        console.log(a);
+    }
+    expect: {
+        var a = "FAIL";
+        0;
+        var b = a = "PASS";
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}

test/compress/transform.js

@@ -103,6 +103,7 @@ if_return: {
         booleans: true,
         conditionals: true,
         if_return: true,
+        passes: 2,
         sequences: true,
         side_effects: true,
     }

test/compress/typeof.js

@@ -166,9 +166,7 @@ duplicate_lambda_arg_name: {
         }());
     }
     expect: {
-        console.log(function long_name(long_name) {
-            return typeof long_name;
-        }());
+        console.log("undefined");
     }
     expect_stdout: "undefined"
 }
@@ -295,3 +293,145 @@ issue_2728_6: {
     }
     expect_stdout: "function undefined"
 }
+
+typeof_defined_1: {
+    options = {
+        side_effects: true,
+        typeofs: true,
+    }
+    input: {
+        "undefined" == typeof A && A;
+        "undefined" != typeof A && A;
+        "undefined" == typeof A || A;
+        "undefined" != typeof A || A;
+    }
+    expect: {
+        "undefined" == typeof A && A;
+        "undefined" != typeof A || A;
+    }
+}
+
+typeof_defined_2: {
+    options = {
+        side_effects: true,
+        typeofs: true,
+    }
+    input: {
+        "function" == typeof A && A;
+        "function" != typeof A && A;
+        "function" == typeof A || A;
+        "function" != typeof A || A;
+    }
+    expect: {
+        "function" != typeof A && A;
+        "function" == typeof A || A;
+    }
+}
+
+typeof_defined_3: {
+    options = {
+        side_effects: true,
+        typeofs: true,
+    }
+    input: {
+        "undefined" == typeof A && "undefined" == typeof B && (A, B);
+        "undefined" == typeof A && "undefined" != typeof B && (A, B);
+        "undefined" != typeof A && "undefined" == typeof B && (A, B);
+        "undefined" != typeof A && "undefined" != typeof B && (A, B);
+        "undefined" == typeof A && "undefined" == typeof B || (A, B);
+        "undefined" == typeof A && "undefined" != typeof B || (A, B);
+        "undefined" != typeof A && "undefined" == typeof B || (A, B);
+        "undefined" != typeof A && "undefined" != typeof B || (A, B);
+        "undefined" == typeof A || "undefined" == typeof B && (A, B);
+        "undefined" == typeof A || "undefined" != typeof B && (A, B);
+        "undefined" != typeof A || "undefined" == typeof B && (A, B);
+        "undefined" != typeof A || "undefined" != typeof B && (A, B);
+        "undefined" == typeof A || "undefined" == typeof B || (A, B);
+        "undefined" == typeof A || "undefined" != typeof B || (A, B);
+        "undefined" != typeof A || "undefined" == typeof B || (A, B);
+        "undefined" != typeof A || "undefined" != typeof B || (A, B);
+    }
+    expect: {
+        "undefined" == typeof A && "undefined" == typeof B && (A, B);
+        "undefined" == typeof A && "undefined" != typeof B && A;
+        "undefined" != typeof A && "undefined" == typeof B && B;
+        "undefined" == typeof A && "undefined" == typeof B || (A, B);
+        "undefined" == typeof A && "undefined" != typeof B || (A, B);
+        "undefined" != typeof A && "undefined" == typeof B || (A, B);
+        "undefined" != typeof A && "undefined" != typeof B || (A, B);
+        "undefined" == typeof A || "undefined" == typeof B && B;
+        "undefined" != typeof A || "undefined" == typeof B && (A, B);
+        "undefined" != typeof A || "undefined" != typeof B && A;
+        "undefined" == typeof A || "undefined" != typeof B || B;
+        "undefined" != typeof A || "undefined" == typeof B || A;
+        "undefined" != typeof A || "undefined" != typeof B || (A, B);
+    }
+}
+
+typeof_defined_4: {
+    options = {
+        side_effects: true,
+        typeofs: true,
+    }
+    input: {
+        "object" == typeof A && "object" == typeof B && (A, B);
+        "object" == typeof A && "object" != typeof B && (A, B);
+        "object" != typeof A && "object" == typeof B && (A, B);
+        "object" != typeof A && "object" != typeof B && (A, B);
+        "object" == typeof A && "object" == typeof B || (A, B);
+        "object" == typeof A && "object" != typeof B || (A, B);
+        "object" != typeof A && "object" == typeof B || (A, B);
+        "object" != typeof A && "object" != typeof B || (A, B);
+        "object" == typeof A || "object" == typeof B && (A, B);
+        "object" == typeof A || "object" != typeof B && (A, B);
+        "object" != typeof A || "object" == typeof B && (A, B);
+        "object" != typeof A || "object" != typeof B && (A, B);
+        "object" == typeof A || "object" == typeof B || (A, B);
+        "object" == typeof A || "object" != typeof B || (A, B);
+        "object" != typeof A || "object" == typeof B || (A, B);
+        "object" != typeof A || "object" != typeof B || (A, B);
+    }
+    expect: {
+        "object" == typeof A && "object" != typeof B && B;
+        "object" != typeof A && "object" == typeof B && A;
+        "object" != typeof A && "object" != typeof B && (A, B);
+        "object" == typeof A && "object" == typeof B || (A, B);
+        "object" == typeof A && "object" != typeof B || (A, B);
+        "object" != typeof A && "object" == typeof B || (A, B);
+        "object" != typeof A && "object" != typeof B || (A, B);
+        "object" == typeof A || "object" == typeof B && A;
+        "object" == typeof A || "object" != typeof B && (A, B);
+        "object" != typeof A || "object" != typeof B && B;
+        "object" == typeof A || "object" == typeof B || (A, B);
+        "object" == typeof A || "object" != typeof B || A;
+        "object" != typeof A || "object" == typeof B || B;
+    }
+}
+
+emberjs_global: {
+    options = {
+        comparisons: true,
+        conditionals: true,
+        if_return: true,
+        passes: 2,
+        side_effects: true,
+        toplevel: true,
+        typeofs: true,
+        unused: true,
+    }
+    input: {
+        var a;
+        if (typeof A === "object") {
+            a = A;
+        } else if (typeof B === "object") {
+            a = B;
+        } else {
+            throw new Error("PASS");
+        }
+    }
+    expect: {
+        if ("object" != typeof A && "object" != typeof B)
+            throw new Error("PASS");
+    }
+    expect_stdout: Error("PASS")
+}

test/compress/unicode.js

@@ -16,6 +16,81 @@ unicode_parse_variables: {
     }
 }
 
+unicode_escaped_identifier: {
+    input: {
+        var \u0061 = "\ud800\udc00";
+        console.log(a);
+    }
+    expect_exact: 'var a="\ud800\udc00";console.log(a);'
+    expect_stdout: "\ud800\udc00"
+}
+
+unicode_identifier_ascii_only: {
+    beautify = {
+        ascii_only: true,
+    }
+    input: {
+        var \u0061 = "testing \udbc4\udd11";
+        var bar = "h\u0065llo";
+        console.log(a, \u0062\u0061r);
+    }
+    expect_exact: 'var a="testing \\udbc4\\udd11";var bar="hello";console.log(a,bar);'
+    expect_stdout: "testing \udbc4\udd11 hello"
+}
+
+unicode_string_literals: {
+    beautify = {
+        ascii_only: true,
+    }
+    input: {
+        var a = "6 length unicode character: \udbc4\udd11";
+        console.log(\u0061);
+    }
+    expect_exact: 'var a="6 length unicode character: \\udbc4\\udd11";console.log(a);'
+    expect_stdout: "6 length unicode character: \udbc4\udd11"
+}
+
+check_escape_style: {
+    beautify = {
+        ascii_only: true,
+    }
+    input: {
+        var a = "\x01";
+        var \ua0081 = "\x10"; // \u0081 only in ID_Continue
+        var \u0100 = "\u0100";
+        var \u1000 = "\u1000";
+        var \u1000 = "\ud800\udc00";
+        var \u3f80 = "\udbc0\udc00";
+        console.log(\u0061, \ua0081, \u0100, \u1000, \u3f80);
+    }
+    expect_exact: 'var a="\\x01";var \\ua0081="\\x10";var \\u0100="\\u0100";var \\u1000="\\u1000";var \\u1000="\\ud800\\udc00";var \\u3f80="\\udbc0\\udc00";console.log(a,\\ua0081,\\u0100,\\u1000,\\u3f80);'
+    expect_stdout: "\u0001 \u0010 \u0100 \ud800\udc00 \udbc0\udc00"
+}
+
+escape_non_escaped_identifier: {
+    beautify = {
+        ascii_only: true,
+    }
+    input: {
+        var µþ = "µþ";
+        console.log(\u00b5þ);
+    }
+    expect_exact: 'var \\u00b5\\u00fe="\\xb5\\xfe";console.log(\\u00b5\\u00fe);'
+    expect_stdout: "µþ"
+}
+
+non_escape_2_non_escape: {
+    beautify = {
+        ascii_only: false,
+    }
+    input: {
+        var µþ = "µþ";
+        console.log(\u00b5þ);
+    }
+    expect_exact: 'var µþ="µþ";console.log(µþ);'
+    expect_stdout: "µþ"
+}
+
 issue_2242_1: {
     beautify = {
         ascii_only: false,
@@ -24,6 +99,7 @@ issue_2242_1: {
         console.log("\ud83d", "\ude00", "\ud83d\ude00", "\ud83d@\ude00");
     }
     expect_exact: 'console.log("\\ud83d","\\ude00","\ud83d\ude00","\\ud83d@\\ude00");'
+    expect_stdout: "\ud83d \ude00 \ud83d\ude00 \ud83d@\ude00"
 }
 
 issue_2242_2: {
@@ -34,6 +110,7 @@ issue_2242_2: {
         console.log("\ud83d", "\ude00", "\ud83d\ude00", "\ud83d@\ude00");
     }
     expect_exact: 'console.log("\\ud83d","\\ude00","\\ud83d\\ude00","\\ud83d@\\ude00");'
+    expect_stdout: "\ud83d \ude00 \ud83d\ude00 \ud83d@\ude00"
 }
 
 issue_2242_3: {
@@ -44,6 +121,7 @@ issue_2242_3: {
         console.log("\ud83d" + "\ude00", "\ud83d" + "@" + "\ude00");
     }
     expect_exact: 'console.log("\\ud83d"+"\\ude00","\\ud83d"+"@"+"\\ude00");'
+    expect_stdout: "\ud83d\ude00 \ud83d@\ude00"
 }
 
 issue_2242_4: {
@@ -54,6 +132,7 @@ issue_2242_4: {
         console.log("\ud83d" + "\ude00", "\ud83d" + "@" + "\ude00");
     }
     expect_exact: 'console.log("\ud83d\ude00","\\ud83d@\\ude00");'
+    expect_stdout: "\ud83d\ude00 \ud83d@\ude00"
 }
 
 issue_2569: {

test/compress/webkit.js

@@ -0,0 +1,109 @@
+lambda_call_dot_assign: {
+    beautify = {
+        webkit: false,
+    }
+    input: {
+        console.log(function() {
+            return {};
+        }().a = 1);
+    }
+    expect_exact: "console.log(function(){return{}}().a=1);"
+    expect_stdout: "1"
+}
+
+lambda_call_dot_assign_webkit: {
+    beautify = {
+        webkit: true,
+    }
+    input: {
+        console.log(function() {
+            return {};
+        }().a = 1);
+    }
+    expect_exact: "console.log((function(){return{}}()).a=1);"
+    expect_stdout: "1"
+}
+
+lambda_dot_assign: {
+    beautify = {
+        webkit: false,
+    }
+    input: {
+        console.log(function() {
+            1 + 1;
+        }.a = 1);
+    }
+    expect_exact: "console.log(function(){1+1}.a=1);"
+    expect_stdout: "1"
+}
+
+lambda_dot_assign_webkit: {
+    beautify = {
+        webkit: true,
+    }
+    input: {
+        console.log(function() {
+            1 + 1;
+        }.a = 1);
+    }
+    expect_exact: "console.log((function(){1+1}).a=1);"
+    expect_stdout: "1"
+}
+
+lambda_name_mangle: {
+    mangle = {}
+    input: {
+        console.log(typeof function foo(bar) {});
+    }
+    expect_exact: "console.log(typeof function o(n){});"
+    expect_stdout: "function"
+}
+
+lambda_name_mangle_ie8: {
+    mangle = {
+        ie8: true,
+        toplevel: true,
+    }
+    input: {
+        console.log(typeof function foo(bar) {});
+    }
+    expect_exact: "console.log(typeof function n(o){});"
+    expect_stdout: "function"
+}
+
+function_name_mangle: {
+    options = {
+        keep_fnames: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    mangle = {}
+    input: {
+        (function() {
+            function foo(bar) {}
+            console.log(typeof foo);
+        })();
+    }
+    expect_exact: "(function(){console.log(typeof function o(n){})})();"
+    expect_stdout: "function"
+}
+
+function_name_mangle_ie8: {
+    options = {
+        keep_fnames: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    mangle = {
+        ie8: true,
+        toplevel: true,
+    }
+    input: {
+        (function() {
+            function foo(bar) {}
+            console.log(typeof foo);
+        })();
+    }
+    expect_exact: "(function(){console.log(typeof function n(o){})})();"
+    expect_stdout: "function"
+}

test/exports.js

@@ -1,16 +1,15 @@
-exports["base54"] = base54;
 exports["Compressor"] = Compressor;
 exports["defaults"] = defaults;
-exports["is_identifier"] = is_identifier;
 exports["JS_Parse_Error"] = JS_Parse_Error;
+exports["List"] = List;
 exports["mangle_properties"] = mangle_properties;
 exports["minify"] = minify;
 exports["OutputStream"] = OutputStream;
 exports["parse"] = parse;
 exports["push_uniq"] = push_uniq;
 exports["reserve_quoted_keys"] = reserve_quoted_keys;
-exports["SourceMap"] = SourceMap;
 exports["string_template"] = string_template;
+exports["to_ascii"] = to_ascii;
 exports["tokenizer"] = tokenizer;
 exports["TreeTransformer"] = TreeTransformer;
 exports["TreeWalker"] = TreeWalker;

test/fetch.js

@@ -23,10 +23,9 @@ module.exports = function(url, callback) {
         var options = parse(url);
         options.rejectUnauthorized = false;
         require(options.protocol.slice(0, -1)).get(options, function(res) {
-            if (res.statusCode !== 200) return callback(res);
-            res.pipe(fs.createWriteStream(local(url)).on("close", function() {
-                callback(null, read(url));
-            }));
+            if (res.statusCode !== 200) return callback(res.statusCode);
+            res.pipe(fs.createWriteStream(local(url)));
+            callback(null, res);
         });
     }).on("open", function() {
         callback(null, result);

test/input/issue-1482/beautify.js

@@ -0,0 +1,17 @@
+if (x) foo();
+
+if (x) foo(); else baz();
+
+if (x) foo(); else if (y) bar(); else baz();
+
+if (x) if (y) foo(); else bar(); else baz();
+
+if (x) foo(); else if (y) bar(); else if (z) baz(); else moo();
+
+function f() {
+    if (x) foo();
+    if (x) foo(); else baz();
+    if (x) foo(); else if (y) bar(); else baz();
+    if (x) if (y) foo(); else bar(); else baz();
+    if (x) foo(); else if (y) bar(); else if (z) baz(); else moo();
+}

test/input/issue-1482/default.js

@@ -1,17 +1 @@
-if (x) foo();
-
-if (x) foo(); else baz();
-
-if (x) foo(); else if (y) bar(); else baz();
-
-if (x) if (y) foo(); else bar(); else baz();
-
-if (x) foo(); else if (y) bar(); else if (z) baz(); else moo();
-
-function f() {
-    if (x) foo();
-    if (x) foo(); else baz();
-    if (x) foo(); else if (y) bar(); else baz();
-    if (x) if (y) foo(); else bar(); else baz();
-    if (x) foo(); else if (y) bar(); else if (z) baz(); else moo();
-}
+if(x)foo();if(x)foo();else baz();if(x)foo();else if(y)bar();else baz();if(x)if(y)foo();else bar();else baz();if(x)foo();else if(y)bar();else if(z)baz();else moo();function f(){if(x)foo();if(x)foo();else baz();if(x)foo();else if(y)bar();else baz();if(x)if(y)foo();else bar();else baz();if(x)foo();else if(y)bar();else if(z)baz();else moo()}

test/input/issue-3294/input.js

@@ -0,0 +1,6 @@
+var Foo = function Foo(){console.log(1+2);}; new Foo();
+
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,DeadBeef
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjpudWxsLCJzb3VyY2VzIjpbInN0ZGluIl0sInNvdXJjZXNDb250ZW50IjpbImNsYXNzIEZvbyB7IGNvbnN0cnVjdG9yKCl7Y29uc29sZS5sb2coMSsyKTt9IH0gbmV3IEZvbygpO1xuIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiJBQUFBLElBQU0sR0FBRyxHQUFDLEFBQUUsWUFBVyxFQUFFLENBQUMsT0FBTyxDQUFDLEdBQUcsQ0FBQyxDQUFDLENBQUMsQ0FBQyxDQUFDLENBQUMsQ0FBQyxDQUFBLEFBQUUsQ0FBQyxJQUFJLEdBQUcsRUFBRSxDQUFDOyJ9
+
+

test/input/issue-3294/output.js

@@ -0,0 +1,2 @@
+new function(){console.log(3)};
+//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIl0sIm5hbWVzIjpbImNvbnNvbGUiLCJsb2ciXSwibWFwcGluZ3MiOiJBQUErQyxJQUFyQyxXQUFnQkEsUUFBUUMsSUFBSSIsInNvdXJjZXNDb250ZW50IjpbImNsYXNzIEZvbyB7IGNvbnN0cnVjdG9yKCl7Y29uc29sZS5sb2coMSsyKTt9IH0gbmV3IEZvbygpO1xuIl19

test/input/issue-3315/config.json

@@ -0,0 +1,8 @@
+{
+    "compress": false,
+    "mangle": {
+        "properties": {
+            "regex": "/^_/"
+        }
+    }
+}

test/input/issue-3315/input.js

@@ -0,0 +1,8 @@
+function f() {
+    "aaaaaaaaaa";
+    var o = {
+        prop: 1,
+        _int: 2,
+    };
+    return o.prop + o._int;
+}

test/input/issue-3441/input.js

@@ -0,0 +1,8 @@
+// Generated by CoffeeScript 2.4.1
+(function() {
+  console.log('hello');
+
+}).call(this);
+
+//# sourceMappingURL=data:application/json;base64,eyJ2ZXJzaW9uIjozLCJmaWxlIjoibWFpbi5qcyIsInNvdXJjZVJvb3QiOiIiLCJzb3VyY2VzIjpbIm1haW4uY29mZmVlIl0sIm5hbWVzIjpbXSwibWFwcGluZ3MiOiI7QUFBQTtFQUFBLE9BQU8sQ0FBQyxHQUFSLENBQVksT0FBWjtBQUFBIiwic291cmNlc0NvbnRlbnQiOlsiY29uc29sZS5sb2cgJ2hlbGxvJ1xuIl19
+//# sourceURL=/Users/mohamed/Downloads/main.coffee

test/input/reduce/label.js

@@ -0,0 +1,9 @@
+var o = this;
+
+for (var k in o) L17060: {
+    a++;
+}
+
+var a;
+
+console.log(k);

test/input/reduce/label.reduced.js

@@ -0,0 +1,16 @@
+var o = this;
+
+for (var k in o) {
+    0;
+}
+
+var a;
+
+console.log(k);
+// output: a
+// 
+// minify: k
+// 
+// options: {
+//   "mangle": false
+// }

test/input/reduce/unsafe_math.js

@@ -0,0 +1,18 @@
+var _calls_ = 10, a = 100, b = 10, c = 0;
+
+function f0(b_1, a, undefined_2) {
+    a++ + ++b;
+    {
+        var expr2 = (b + 1 - .1 - .1 - .1 || a || 3).toString();
+        L20778: for (var key2 in expr2) {
+            (c = c + 1) + [ --b + b_1, typeof f0 == "function" && --_calls_ >= 0 && f0(--b + typeof (undefined_2 = 1 === 1 ? a : b), --b + {
+                c: (c = c + 1) + null
+            }, a++ + (typeof f0 == "function" && --_calls_ >= 0 && f0(typeof (c = 1 + c, 3 / "a" * ("c" >>> 23..toString()) >= (b_1 && (b_1[(c = c + 1) + a--] = (- -0,
+            true + {})))), 3, 25))), 1 === 1 ? a : b ];
+        }
+    }
+}
+
+var a_1 = f0([ , 0 ].length === 2);
+
+console.log(null, a, b, c, Infinity, NaN, undefined);

test/input/reduce/unsafe_math.reduced.js

@@ -0,0 +1,19 @@
+var b = 0;
+
+var expr2 = (0 - 1 - .1 - .1).toString();
+
+for (var key2 in expr2) {
+    --b;
+}
+
+console.log(b);
+// output: -19
+// 
+// minify: -4
+// 
+// options: {
+//   "compress": {
+//     "unsafe_math": true
+//   },
+//   "mangle": false
+// }

test/jetstream.js

@@ -3,7 +3,7 @@
 
 "use strict";
 
-var site = "https://browserbench.org/JetStream";
+var site = "https://browserbench.org/JetStream1.1";
 if (typeof phantom == "undefined") {
     require("../tools/exit");
     var args = process.argv.slice(2);
@@ -25,30 +25,35 @@ if (typeof phantom == "undefined") {
         request.resume();
         var url = site + request.url;
         fetch(url, function(err, res) {
-            if (err) throw err;
-            response.writeHead(200, {
-                "Content-Type": {
-                    css: "text/css",
-                    js: "application/javascript",
-                    png: "image/png"
-                }[url.slice(url.lastIndexOf(".") + 1)] || "text/html; charset=utf-8"
-            });
-            if (/\.js$/.test(url)) {
-                var stderr = "";
-                var uglifyjs = child_process.fork("bin/uglifyjs", args, {
-                    silent: true
-                }).on("exit", function(code) {
-                    console.log("uglifyjs", url.slice(site.length + 1), args.join(" "));
-                    console.log(stderr);
-                    if (code) throw new Error("uglifyjs failed with code " + code);
-                });
-                uglifyjs.stderr.on("data", function(data) {
-                    stderr += data;
-                }).setEncoding("utf8");
-                uglifyjs.stdout.pipe(response);
-                res.pipe(uglifyjs.stdin);
+            if (err) {
+                if (typeof err != "number") throw err;
+                response.writeHead(err);
+                response.end();
             } else {
-                res.pipe(response);
+                response.writeHead(200, {
+                    "Content-Type": {
+                        css: "text/css",
+                        js: "application/javascript",
+                        png: "image/png"
+                    }[url.slice(url.lastIndexOf(".") + 1)] || "text/html; charset=utf-8"
+                });
+                if (/\.js$/.test(url)) {
+                    var stderr = "";
+                    var uglifyjs = child_process.fork("bin/uglifyjs", args, {
+                        silent: true
+                    }).on("exit", function(code) {
+                        console.log("uglifyjs", url.slice(site.length + 1), args.join(" "));
+                        console.log(stderr);
+                        if (code) throw new Error("uglifyjs failed with code " + code);
+                    });
+                    uglifyjs.stderr.on("data", function(data) {
+                        stderr += data;
+                    }).setEncoding("utf8");
+                    uglifyjs.stdout.pipe(response);
+                    res.pipe(uglifyjs.stdin);
+                } else {
+                    res.pipe(response);
+                }
             }
         });
     }).listen();
@@ -57,8 +62,17 @@ if (typeof phantom == "undefined") {
         if (debug) {
             console.log("http://localhost:" + port + "/");
         } else {
-            child_process.exec("npm install phantomjs-prebuilt@2.1.14 --no-save", function(error) {
-                if (error) throw error;
+            child_process.spawn(process.platform == "win32" ? "npm.cmd" : "npm", [
+                "install",
+                "phantomjs-prebuilt@2.1.14",
+                "--no-audit",
+                "--no-optional",
+                "--no-save",
+                "--no-update-notifier",
+            ], {
+                stdio: [ "ignore", 1, 2 ]
+            }).on("exit", function(code) {
+                if (code) throw new Error("npm install failed!");
                 var program = require("phantomjs-prebuilt").exec(process.argv[1], port);
                 program.stdout.pipe(process.stdout);
                 program.stderr.pipe(process.stderr);

test/mocha.js

@@ -1,7 +1,7 @@
 var fs = require("fs");
 
 var config = {
-    limit: 5000,
+    limit: 10000,
     timeout: function(limit) {
         this.limit = limit;
     }
@@ -55,11 +55,11 @@ process.nextTick(function run() {
         var elapsed = Date.now();
         var timer;
         var done = function() {
-            reset();
             elapsed = Date.now() - elapsed;
             if (elapsed > task.limit) {
                 throw new Error("Timed out: " + elapsed + "ms > " + task.limit + "ms");
             }
+            reset();
             log_titles(console.log, task.titles, green('\u221A '));
             process.nextTick(run);
         };

test/mocha/cli.js

@@ -1,6 +1,7 @@
 var assert = require("assert");
 var exec = require("child_process").exec;
 var fs = require("fs");
+var run_code = require("../sandbox").run_code;
 
 function read(path) {
     return fs.readFileSync(path, "utf8");
@@ -11,7 +12,9 @@ describe("bin/uglifyjs", function() {
     it("Should produce a functional build when using --self", function(done) {
         this.timeout(30000);
         var command = uglifyjscmd + ' --self -cm --wrap WrappedUglifyJS';
-        exec(command, function(err, stdout) {
+        exec(command, {
+            maxBuffer: 1048576
+        }, function(err, stdout) {
             if (err) throw err;
             eval(stdout);
             assert.strictEqual(typeof WrappedUglifyJS, "object");
@@ -46,7 +49,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should give sensible error against invalid input source map", function(done) {
-        var command = uglifyjscmd + " test/mocha.js --source-map content=blah,url=inline";
+        var command = uglifyjscmd + " test/mocha.js --source-map content=blah,url=inline --verbose";
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.deepEqual(stderr.split(/\n/).slice(0, 2), [
@@ -82,6 +85,7 @@ describe("bin/uglifyjs", function() {
             "test/input/issue-2082/sample.js",
             "--source-map", "content=test/input/issue-2082/sample.js.map",
             "--source-map", "url=inline",
+            "--verbose",
         ].join(" ");
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
@@ -112,13 +116,12 @@ describe("bin/uglifyjs", function() {
 
         var child = exec(command, function(err, stdout) {
             if (err) throw err;
-
-            assert.strictEqual(stdout, read("test/input/pr-3040/expect.js"));
+            assert.strictEqual(stdout, read("test/input/issue-3040/expect.js"));
             done();
         });
         setTimeout(function() {
-            fs.writeFileSync(mapFile, read("test/input/pr-3040/input.js.map"));
-            child.stdin.end(read("test/input/pr-3040/input.js"));
+            fs.writeFileSync(mapFile, read("test/input/issue-3040/input.js.map"));
+            child.stdin.end(read("test/input/issue-3040/input.js"));
         }, 1000);
     });
     it("Should work with --keep-fnames (mangle only)", function(done) {
@@ -173,7 +176,7 @@ describe("bin/uglifyjs", function() {
         var command = uglifyjscmd + ' test/input/issue-1482/input.js -b';
         exec(command, function(err, stdout) {
             if (err) throw err;
-            assert.strictEqual(stdout, read("test/input/issue-1482/default.js"));
+            assert.strictEqual(stdout, read("test/input/issue-1482/beautify.js"));
             done();
         });
     });
@@ -185,6 +188,22 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
+    it("Should work with `--output-opts`", function(done) {
+        var command = uglifyjscmd + ' test/input/issue-1482/input.js -O';
+        exec(command, function(err, stdout) {
+            if (err) throw err;
+            assert.strictEqual(stdout, read("test/input/issue-1482/default.js"));
+            done();
+        });
+    });
+    it("Should fail when both --beautify & --output-opts are specified", function(done) {
+        var command = uglifyjscmd + " test/input/issue-520/input.js -bO";
+        exec(command, function(err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stderr, "ERROR: --beautify cannot be used with --output-opts\n");
+            done();
+        });
+    });
     it("Should process inline source map", function(done) {
         var command = [
             uglifyjscmd,
@@ -201,7 +220,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should warn for missing inline source map", function(done) {
-        var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map content=inline,url=inline";
+        var command = uglifyjscmd + " test/input/issue-1323/sample.js --source-map content=inline,url=inline --warn";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, [
@@ -220,6 +239,7 @@ describe("bin/uglifyjs", function() {
             "test/input/issue-520/input.js",
             "test/input/issue-1323/sample.js",
             "--source-map", "content=inline,url=inline",
+            "--warn",
         ].join(" ");
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
@@ -257,7 +277,7 @@ describe("bin/uglifyjs", function() {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/simple.js:1,12");
             assert.strictEqual(lines[1], "function f(a{}");
             assert.strictEqual(lines[2], "            ^");
-            assert.strictEqual(lines[3], "ERROR: Unexpected token punc «{», expected punc «,»");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: punc «{», expected: punc «,»");
             done();
         });
     });
@@ -281,7 +301,7 @@ describe("bin/uglifyjs", function() {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/eof.js:2,0");
             assert.strictEqual(lines[1], "foo, bar(");
             assert.strictEqual(lines[2], "         ^");
-            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof (undefined)");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof");
             done();
         });
     });
@@ -293,7 +313,7 @@ describe("bin/uglifyjs", function() {
             assert.strictEqual(lines[0], "Parse error at test/input/invalid/loop-no-body.js:2,0");
             assert.strictEqual(lines[1], "for (var i = 0; i < 1; i++) ");
             assert.strictEqual(lines[2], "                            ^");
-            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof (undefined)");
+            assert.strictEqual(lines[3], "ERROR: Unexpected token: eof");
             done();
         });
     });
@@ -362,7 +382,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/dot_1.js:1,2",
                 "a.=",
                 "  ^",
-                "ERROR: Unexpected token: operator (=)"
+                "ERROR: Unexpected token: operator «=», expected: name"
             ].join("\n"));
             done();
         });
@@ -376,7 +396,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/dot_2.js:1,0",
                 "%.a;",
                 "^",
-                "ERROR: Unexpected token: operator (%)"
+                "ERROR: Unexpected token: operator «%»"
             ].join("\n"));
             done();
         });
@@ -390,7 +410,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/dot_3.js:1,2",
                 "a./();",
                 "  ^",
-                "ERROR: Unexpected token: operator (/)"
+                "ERROR: Unexpected token: operator «/», expected: name"
             ].join("\n"));
             done();
         });
@@ -404,7 +424,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/object.js:1,13",
                 "console.log({%: 1});",
                 "             ^",
-                "ERROR: Unexpected token: operator (%)"
+                "ERROR: Unexpected token: operator «%»"
             ].join("\n"));
             done();
         });
@@ -465,7 +485,7 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
-    it("Should throw syntax error (catch(eval))", function(done) {
+    it("Should throw syntax error (catch (eval))", function(done) {
         var command = uglifyjscmd + ' test/input/invalid/try.js';
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
@@ -502,7 +522,7 @@ describe("bin/uglifyjs", function() {
                 "Parse error at test/input/invalid/else.js:1,7",
                 "if (0) else 1;",
                 "       ^",
-                "ERROR: Unexpected token: keyword (else)"
+                "ERROR: Unexpected token: keyword «else»"
             ].join("\n"));
             done();
         });
@@ -633,12 +653,20 @@ describe("bin/uglifyjs", function() {
             done();
         });
     });
+    it("Should work with mangle.properties.regex from --config-file", function(done) {
+        var command = uglifyjscmd + " test/input/issue-3315/input.js --config-file test/input/issue-3315/config.json";
+        exec(command, function(err, stdout) {
+            if (err) throw err;
+            assert.strictEqual(stdout, 'function f(){"aaaaaaaaaa";var a={prop:1,a:2};return a.prop+a.a}\n');
+            done();
+        });
+    });
     it("Should fail with --define a-b", function(done) {
         var command = uglifyjscmd + " test/input/issue-505/input.js --define a-b";
         exec(command, function(err, stdout, stderr) {
             assert.ok(err);
             assert.strictEqual(stdout, "");
-            assert.strictEqual(stderr, "Error parsing arguments for 'define': a-b\n");
+            assert.strictEqual(stderr, "ERROR: cannot parse arguments for 'define': a-b\n");
             done();
         });
     });
@@ -651,7 +679,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should work with explicit --no-rename", function(done) {
-        var command = uglifyjscmd + " test/input/rename/input.js -mc --no-rename";
+        var command = uglifyjscmd + " test/input/rename/input.js -mc passes=2 --no-rename";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, "function f(n){return function(n){return n}(n)}\n");
@@ -659,7 +687,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should work with implicit --rename", function(done) {
-        var command = uglifyjscmd + " test/input/rename/input.js -mc";
+        var command = uglifyjscmd + " test/input/rename/input.js -mc passes=2";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, "function f(n){return n}\n");
@@ -667,7 +695,7 @@ describe("bin/uglifyjs", function() {
         });
     });
     it("Should work with implicit --no-rename", function(done) {
-        var command = uglifyjscmd + " test/input/rename/input.js -c";
+        var command = uglifyjscmd + " test/input/rename/input.js -c passes=2";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
             assert.strictEqual(stdout, "function f(x){return function(x){return x}(x)}\n");
@@ -702,8 +730,36 @@ describe("bin/uglifyjs", function() {
         var command = uglifyjscmd + " test/input/enclose/input.js --enclose window,undefined:window --wrap exports";
         exec(command, function(err, stdout, stderr) {
             if (err) throw err;
-            assert.strictEqual(stdout, '(function(window,undefined){(function(exports){function enclose(){console.log("test enclose")}enclose()})(typeof exports=="undefined"?exports={}:exports)})(window);\n');
+            assert.strictEqual(stdout, '(function(exports){(function(window,undefined){function enclose(){console.log("test enclose")}enclose()})(window)})(typeof exports=="undefined"?exports={}:exports);\n');
             done();
         });
     });
+    it("Should compress swarm of unused variables with reasonable performance", function(done) {
+        var code = [
+            "console.log(function() {",
+        ];
+        for (var i = 0; i < 10000; i++) {
+            code.push("var obj" + i + " = {p: " + i + "};");
+        }
+        code.push("var map = {");
+        for (var i = 0; i < 10000; i++) {
+            code.push("obj" + i + ": obj" + i + ",");
+        }
+        code = code.concat([
+            "};",
+            "return obj25.p + obj121.p + obj1024.p;",
+            "}());",
+        ]).join("\n");
+        exec(uglifyjscmd + " -mc", function(err, stdout) {
+            if (err) throw err;
+            assert.strictEqual(stdout, [
+                "console.log(function(){",
+                "var p={p:25},n={p:121},o={p:1024};",
+                "return p.p+n.p+o.p",
+                "}());\n",
+            ].join(""));
+            assert.strictEqual(run_code(stdout), run_code(code));
+            done();
+        }).stdin.end(code);
+    });
 });

test/mocha/comments.js

@@ -13,7 +13,7 @@ describe("comments", function() {
 
         var fail = function(e) {
             return e instanceof UglifyJS.JS_Parse_Error
-                && e.message === "Unexpected token: operator (>)"
+                && e.message === "Unexpected token: operator «>»"
                 && e.line === 2
                 && e.col === 0;
         }
@@ -36,7 +36,7 @@ describe("comments", function() {
 
         var fail = function(e) {
             return e instanceof UglifyJS.JS_Parse_Error
-                && e.message === "Unexpected token: operator (>)"
+                && e.message === "Unexpected token: operator «>»"
                 && e.line === 5
                 && e.col === 0;
         }
@@ -48,53 +48,84 @@ describe("comments", function() {
         }
     });
 
-    it("Should handle comment within return correctly", function() {
-        var result = UglifyJS.minify([
-            "function unequal(x, y) {",
-            "    return (",
-            "        // Either one",
-            "        x < y",
-            "        ||",
-            "        y < x",
-            "    );",
-            "}",
-        ].join("\n"), {
-            compress: false,
-            mangle: false,
-            output: {
-                beautify: true,
-                comments: "all",
-            },
+    describe("comment within return", function() {
+        it("Should handle leading return", function() {
+            var result = UglifyJS.minify([
+                "function unequal(x, y) {",
+                "    return (",
+                "        // Either one",
+                "        x < y",
+                "        ||",
+                "        y < x",
+                "    );",
+                "}",
+            ].join("\n"), {
+                compress: false,
+                mangle: false,
+                output: {
+                    beautify: true,
+                    comments: "all",
+                },
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, [
+                "function unequal(x, y) {",
+                "    // Either one",
+                "    return x < y || y < x;",
+                "}",
+            ].join("\n"));
         });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, [
-            "function unequal(x, y) {",
-            "    // Either one",
-            "    return x < y || y < x;",
-            "}",
-        ].join("\n"));
-    });
 
-    it("Should handle comment folded into return correctly", function() {
-        var result = UglifyJS.minify([
-            "function f() {",
-            "    /* boo */ x();",
-            "    return y();",
-            "}",
-        ].join("\n"), {
-            mangle: false,
-            output: {
-                beautify: true,
-                comments: "all",
-            },
+        it("Should handle trailing return", function() {
+            var result = UglifyJS.minify([
+                "function unequal(x) {",
+                "    var y;",
+                "    return (",
+                "        // Either one",
+                "        x < y",
+                "        ||",
+                "        y < x",
+                "    );",
+                "}",
+            ].join("\n"), {
+                compress: false,
+                mangle: false,
+                output: {
+                    beautify: true,
+                    comments: "all",
+                },
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, [
+                "function unequal(x) {",
+                "    var y;",
+                "    // Either one",
+                "    return x < y || y < x;",
+                "}",
+            ].join("\n"));
+        });
+
+        it("Should handle comment folded into return", function() {
+            var result = UglifyJS.minify([
+                "function f() {",
+                "    /* boo */ x();",
+                "    return y();",
+                "}",
+            ].join("\n"), {
+                mangle: false,
+                output: {
+                    beautify: true,
+                    comments: "all",
+                },
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, [
+                "function f() {",
+                "    /* boo */",
+                "    return x(), y();",
+                "}",
+            ].join("\n"));
         });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, [
-            "function f() {",
-            "    /* boo */",
-            "    return x(), y();",
-            "}",
-        ].join("\n"));
     });
 
     it("Should not drop comments after first OutputStream", function() {
@@ -228,6 +259,30 @@ describe("comments", function() {
         assert.strictEqual(result.code, code);
     });
 
+    it("Should handle comments around parenthesis correctly", function() {
+        var code = [
+            "a();",
+            "/* foo */",
+            "(b())",
+            "/* bar */",
+            "c();",
+        ].join("\n");
+        var result = UglifyJS.minify(code, {
+            compress: false,
+            mangle: false,
+            output: {
+                comments: "all",
+            },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "a();",
+            "/* foo */",
+            "b()",
+            "/* bar */;c();",
+        ].join("\n"));
+    });
+
     it("Should preserve comments around IIFE", function() {
         var result = UglifyJS.minify("/*a*/(/*b*/function(){/*c*/}/*d*/)/*e*/();", {
             compress: false,
@@ -260,6 +315,60 @@ describe("comments", function() {
         ].join("\n"));
     });
 
+    it("Should handle programmatic AST insertions gracefully", function() {
+        var ast = UglifyJS.parse([
+            "function f() {",
+            "    //foo",
+            "    bar;",
+            "    return;",
+            "}",
+        ].join("\n"));
+        ast.body[0].body[0] = new UglifyJS.AST_Throw({value: ast.body[0].body[0].body});
+        ast.body[0].body[1].value = new UglifyJS.AST_Number({value: 42});
+        assert.strictEqual(ast.print_to_string({comments: "all"}), [
+            "function f(){",
+            "//foo",
+            "throw bar;return 42}",
+        ].join("\n"));
+    });
+
+    it("Should not duplicate sourceMappingURL", function() {
+        var code = [
+            "//# sourceMappingURL=input.map",
+            "print(42);",
+            "//# sourceMappingURL=input.map",
+            "",
+            "//# sourceMappingURL=input.map",
+            "//# sourceMappingURL=input.map",
+            "",
+        ].join("\n");
+
+        var result = UglifyJS.minify(code, {
+            output: { comments: true },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "//# sourceMappingURL=input.map",
+            "print(42);",
+            "//# sourceMappingURL=input.map",
+            "//# sourceMappingURL=input.map",
+            "//# sourceMappingURL=input.map",
+        ].join("\n"));
+
+        result = UglifyJS.minify(code, {
+            output: { comments: true },
+            sourceMap: { url: "output.map" },
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "//# sourceMappingURL=input.map",
+            "print(42);",
+            "//# sourceMappingURL=input.map",
+            "//# sourceMappingURL=input.map",
+            "//# sourceMappingURL=output.map",
+        ].join("\n"));
+    });
+
     describe("comment before constant", function() {
         var js = 'function f() { /*c1*/ var /*c2*/ foo = /*c3*/ false; return foo; }';
 

test/mocha/directives.js

@@ -54,8 +54,8 @@ describe("Directives", function() {
         [
             [
                 '"use strict"\n',
-                [ "use strict"],
-                [ "use asm"]
+                [ "use strict" ],
+                [ "use asm" ]
             ],
             [
                 '"use\\\nstrict";',
@@ -69,19 +69,19 @@ describe("Directives", function() {
             ],
             [
                 '"use \\\nstrict";"use strict";',
-                [],
-                [ "use strict", "use\nstrict", "use \nstrict", "use asm" ]
+                [ "use strict" ],
+                [ "use\nstrict", "use \nstrict", "use asm" ]
             ],
             [
                 '"\\76";',
-                [],
-                [ ">", "\\76" ]
+                [ "\\76" ],
+                [ ">" ]
             ],
             [
                 // no ; or newline
                 '"use strict"',
-                [],
-                [ "use strict", "use\nstrict", "use \nstrict", "use asm" ]
+                [ "use strict" ],
+                [ "use\nstrict", "use \nstrict", "use asm" ]
             ],
             [
                 ';"use strict"',
@@ -106,18 +106,18 @@ describe("Directives", function() {
             ],
             [
                 'function foo() {"use \\\nstrict";"use strict";',
-                [],
-                [ "use strict", "use\nstrict", "use \nstrict", "use asm" ]
+                [ "use strict" ],
+                [ "use\nstrict", "use \nstrict", "use asm" ]
             ],
             [
                 'var foo = function() {"\\76";',
-                [],
-                [ ">", "\\76" ]
+                [ "\\76" ],
+                [ ">" ]
             ],
             [
                 'var foo = function() {"use strict"', // no ; or newline
-                [],
-                [ "use strict", "use\nstrict", "use \nstrict", "use asm" ]
+                [ "use strict" ],
+                [ "use\nstrict", "use \nstrict", "use asm" ]
             ],
             [
                 'var foo = function() {;"use strict"',
@@ -146,7 +146,7 @@ describe("Directives", function() {
                 UglifyJS.parse(tokenizer);
             }, function(e) {
                 return e instanceof UglifyJS.JS_Parse_Error
-                    && e.message === "Unexpected token: punc (])"
+                    && /^Unexpected token: punc «]»/.test(e.message)
             }, test[0]);
             test[1].forEach(function(directive) {
                 assert.strictEqual(tokenizer.has_directive(directive), true, directive + " in " + test[0]);
@@ -156,21 +156,24 @@ describe("Directives", function() {
             });
         });
     });
-    it("Should test EXPECT_DIRECTIVE RegExp", function() {
+    it("Should print semicolon to separate strings from directives", function() {
         [
-            [ "", true ],
-            [ "'test';", true ],
-            [ "'test';;", true ],
-            [ "'tests';\n", true ],
-            [ "'tests'", false ],
-            [ "'tests';   \n\t", true ],
-            [ "'tests';\n\n", true ],
-            [ "\n\n\"use strict\";\n\n", true ],
+            [ "", ';"";' ],
+            [ '"test";', '"test";;"";' ],
+            [ '"test";;', '"test";;"";' ],
+            [ '"tests";\n', '"tests";;"";' ],
+            [ '"tests"', '"tests";;"";' ],
+            [ '"tests";   \n\t', '"tests";;"";' ],
+            [ '"tests";\n\n', '"tests";;"";' ],
+            [ '\n\n"use strict";\n\n', '"use strict";;"";' ],
         ].forEach(function(test) {
+            var ast = UglifyJS.parse(test[0]);
+            ast.body.push(new UglifyJS.AST_SimpleStatement({
+                body: new UglifyJS.AST_String({ value: "" })
+            }));
             var out = UglifyJS.OutputStream();
-            out.print(test[0]);
-            out.print_string("", null, true);
-            assert.strictEqual(out.get() === test[0] + ';""', test[1], test[0]);
+            ast.print(out);
+            assert.strictEqual(out.get(), test[1], test[0]);
         });
     });
     it("Should only print 2 semicolons spread over 2 lines in beautify mode", function() {
@@ -178,8 +181,8 @@ describe("Directives", function() {
             '"use strict";',
             "'use strict';",
             '"use strict";',
-            '"use strict";;',
-            "'use strict';",
+            '"use strict";',
+            ";'use strict';",
             "console.log('use strict');"
         ].join(""), {
             compress: false,
@@ -201,19 +204,23 @@ describe("Directives", function() {
     it("Should not add double semicolons in non-scoped block statements to avoid strings becoming directives", function() {
         [
             [
-                '{"use\x20strict"}',
+                '"use strict";"use\\x20strict";',
+                '"use strict";"use\\x20strict";'
+            ],
+            [
+                '{"use\\x20strict"}',
                 '{"use strict"}'
             ],
             [
-                'function foo(){"use\x20strict";}', // Valid place for directives
-                'function foo(){"use strict"}'
+                'function foo(){"use\\x20strict";}', // Valid place for directives
+                'function foo(){"use\\x20strict"}'
             ],
             [
-                'try{"use\x20strict"}catch(e){}finally{"use\x20strict"}',
+                'try{"use\\x20strict"}catch(e){}finally{"use\\x20strict"}',
                 'try{"use strict"}catch(e){}finally{"use strict"}'
             ],
             [
-                'if(1){"use\x20strict"} else {"use strict"}',
+                'if(1){"use\\x20strict"} else {"use strict"}',
                 'if(1){"use strict"}else{"use strict"}'
             ]
         ].forEach(function(test) {
@@ -225,16 +232,6 @@ describe("Directives", function() {
             assert.strictEqual(result.code, test[1], test[0]);
         });
     });
-    it("Should add double semicolon when relying on automatic semicolon insertion", function() {
-        var result = UglifyJS.minify('"use strict";"use\\x20strict";', {
-            compress: false,
-            output: {
-                semicolons: false
-            }
-        });
-        if (result.error) throw result.error;
-        assert.strictEqual(result.code, '"use strict";;"use strict"\n');
-    });
     it("Should check quote style of directives", function() {
         [
             // 0. Prefer double quotes, unless string contains more double quotes than single quotes
@@ -249,9 +246,9 @@ describe("Directives", function() {
                 '"use strict";'
             ],
             [
-                '"\\\'use strict\\\'";', // Not a directive as it contains quotes
+                '"\\\'use strict\\\'";',
                 0,
-                ';"\'use strict\'";',
+                '"\\\'use strict\\\'";',
             ],
             [
                 "'\"use strict\"';",
@@ -273,7 +270,7 @@ describe("Directives", function() {
                 '"\'use strict\'";',
                 1,
                 // Intentionally causes directive breakage at cost of less logic, usage should be rare anyway
-                "'\\'use strict\\'';",
+                '"\'use strict\'";',
             ],
             [
                 "'\\'use strict\\'';", // Not a valid directive
@@ -305,7 +302,7 @@ describe("Directives", function() {
                 "'\"use strict\"';",
                 2,
                 // Intentionally causes directive breakage at cost of less logic, usage should be rare anyway
-                '"\\\"use strict\\\"";',
+                "'\"use strict\"';",
             ],
             [
                 '"\\"use strict\\"";', // Not a valid directive
@@ -353,8 +350,7 @@ describe("Directives", function() {
             [
                 // Nothing gets optimised in the compressor because "use asm" is the first statement
                 '"use asm";"use\\x20strict";1+1;',
-                // Yet, the parser noticed that "use strict" wasn't a directive
-                '"use asm";;"use strict";1+1;',
+                '"use asm";"use\\x20strict";1+1;'
             ],
             [
                 'function f(){ "use strict" }',

test/mocha/getter-setter.js

@@ -69,7 +69,7 @@ describe("Getters and setters", function() {
         var fail = function(data) {
             return function(e) {
                 return e instanceof UglifyJS.JS_Parse_Error
-                    && e.message === "Unexpected token: operator (" + data.operator + ")";
+                    && e.message === "Unexpected token: operator «" + data.operator + "»";
             };
         };
         var errorMessage = function(data) {

test/mocha/minify.js

@@ -87,7 +87,7 @@ describe("minify", function() {
         assert.strictEqual(run_code(compressed), run_code(original));
     });
 
-    it("Should avoid mangled names in cache", function() {
+    it("Should avoid cached names when mangling top-level variables", function() {
         var cache = {};
         var original = "";
         var compressed = "";
@@ -116,10 +116,34 @@ describe("minify", function() {
         assert.strictEqual(run_code(compressed), run_code(original));
     });
 
+    it("Should avoid cached names when mangling inner-scoped variables", function() {
+        var cache = {};
+        var original = "";
+        var compressed = "";
+        [
+            'var extend = function(a, b) { console.log("extend"); a(); b(); }; function A() { console.log("A"); };',
+            'var B = function(A) { function B() { console.log("B") }; extend(B, A); return B; }(A);',
+        ].forEach(function(code) {
+            var result = UglifyJS.minify(code, {
+                compress: false,
+                nameCache: cache,
+                toplevel: true,
+            });
+            if (result.error) throw result.error;
+            original += code;
+            compressed += result.code;
+        });
+        assert.strictEqual(compressed, [
+            'var o=function(o,n){console.log("extend");o();n()};function n(){console.log("A")}',
+            'var e=function(n){function e(){console.log("B")}o(e,n);return e}(n);',
+        ].join(""));
+        assert.strictEqual(run_code(compressed), run_code(original));
+    });
+
     it("Should not parse invalid use of reserved words", function() {
         assert.strictEqual(UglifyJS.minify("function enum(){}").error, undefined);
         assert.strictEqual(UglifyJS.minify("function static(){}").error, undefined);
-        assert.strictEqual(UglifyJS.minify("function this(){}").error.message, "Unexpected token: name (this)");
+        assert.strictEqual(UglifyJS.minify("function this(){}").error.message, "Unexpected token: name «this»");
     });
 
     describe("keep_quoted_props", function() {
@@ -214,7 +238,7 @@ describe("minify", function() {
             var result = UglifyJS.minify("function f(a{}");
             var err = result.error;
             assert.ok(err instanceof Error);
-            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token punc «{», expected punc «,»");
+            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token: punc «{», expected: punc «,»");
             assert.strictEqual(err.filename, "0");
             assert.strictEqual(err.line, 1);
             assert.strictEqual(err.col, 12);
@@ -241,7 +265,7 @@ describe("minify", function() {
             });
             var err = result.error;
             assert.ok(err instanceof Error);
-            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token: keyword (debugger)");
+            assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Unexpected token: keyword «debugger»");
         });
         it("Should skip inherited properties", function() {
             var foo = Object.create({ skip: this });
@@ -341,7 +365,7 @@ describe("minify", function() {
                 wrap: 'exports',
             });
             if (result.error) throw result.error;
-            assert.strictEqual(result.code, '(function(window,undefined){(function(exports){function enclose(){console.log("test enclose")}enclose()})(typeof exports=="undefined"?exports={}:exports)})(window);');
+            assert.strictEqual(result.code, '(function(exports){(function(window,undefined){function enclose(){console.log("test enclose")}enclose()})(window)})(typeof exports=="undefined"?exports={}:exports);');
         });
     });
 });

test/mocha/number-literal.js

@@ -2,10 +2,18 @@ var assert = require("assert");
 var UglifyJS = require("../node");
 
 describe("Number literals", function() {
+    it("Should allow legacy octal literals in non-strict mode", function() {
+        [
+            "'use strict'\n.slice()\n00",
+            '"use strict"\n.slice()\nvar foo = 00',
+        ].forEach(function(input) {
+            UglifyJS.parse(input);
+        });
+    });
     it("Should not allow legacy octal literals in strict mode", function() {
         var inputs = [
             '"use strict";00;',
-            '"use strict"; var foo = 00;'
+            '"use strict"; var foo = 00;',
         ];
         var test = function(input) {
             return function() {

test/mocha/reduce.js

@@ -0,0 +1,167 @@
+var assert = require("assert");
+var exec = require("child_process").exec;
+var fs = require("fs");
+var reduce_test = require("../reduce");
+var semver = require("semver");
+
+function read(path) {
+    return fs.readFileSync(path, "utf8");
+}
+
+describe("test/reduce.js", function() {
+    this.timeout(60000);
+    it("Should reduce test case", function() {
+        var result = reduce_test(read("test/input/reduce/unsafe_math.js"), {
+            compress: {
+                unsafe_math: true,
+            },
+            mangle: false,
+        }, {
+            verbose: false,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, read("test/input/reduce/unsafe_math.reduced.js"));
+    });
+    it("Should eliminate unreferenced labels", function() {
+        var result = reduce_test(read("test/input/reduce/label.js"), {
+            mangle: false,
+        }, {
+            verbose: false,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, read("test/input/reduce/label.reduced.js"));
+    });
+    it("Should handle test cases with --toplevel", function() {
+        var result = reduce_test([
+            "var Infinity = 42;",
+            "console.log(Infinity);",
+        ].join("\n"), {
+            toplevel: true,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "// Can't reproduce test failure with minify options provided:",
+            "// {",
+            '//   "toplevel": true',
+            "// }",
+        ].join("\n"));
+    });
+    it("Should handle test result of NaN", function() {
+        var result = reduce_test("throw 0 / 0;");
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "// Can't reproduce test failure with minify options provided:",
+            "// {",
+            '//   "compress": {},',
+            '//   "mangle": false',
+            "// }",
+        ].join("\n"));
+    });
+    it("Should print correct output for irreducible test case", function() {
+        var result = reduce_test([
+            "console.log(function f(a) {",
+            "    return f.length;",
+            "}());",
+        ].join("\n"), {
+            compress: {
+                keep_fargs: false,
+            },
+            mangle: false,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            "console.log(function f(a) {",
+            "    return f.length;",
+            "}());",
+            "// output: 1",
+            "// ",
+            "// minify: 0",
+            "// ",
+            "// options: {",
+            '//   "compress": {',
+            '//     "keep_fargs": false',
+            "//   },",
+            '//   "mangle": false',
+            "// }",
+        ].join("\n"));
+    });
+    it("Should fail when invalid option is supplied", function() {
+        var result = reduce_test("", {
+            compress: {
+                unsafe_regex: true,
+            },
+        });
+        var err = result.error;
+        assert.ok(err instanceof Error);
+        assert.strictEqual(err.stack.split(/\n/)[0], "DefaultsError: `unsafe_regex` is not a supported option");
+    });
+    it("Should report on test case with invalid syntax", function() {
+        var result = reduce_test("var 0 = 1;");
+        var err = result.error;
+        assert.ok(err instanceof Error);
+        assert.strictEqual(err.stack.split(/\n/)[0], "SyntaxError: Name expected");
+    });
+    it("Should format multi-line output correctly", function() {
+        var code = [
+            "var a = 0;",
+            "",
+            "for (var b in [ 1, 2, 3 ]) {",
+            "    a = +a + 1 - .2;",
+            "    console.log(a);",
+            "}",
+        ].join("\n");
+        var result = reduce_test(code, {
+            compress: {
+                unsafe_math: true,
+            },
+            mangle: false,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code, [
+            code,
+            "// output: 0.8",
+            "// 1.6",
+            "// 2.4",
+            "// ",
+            "// minify: 0.8",
+            "// 1.6",
+            "// 2.4000000000000004",
+            "// ",
+            "// options: {",
+            '//   "compress": {',
+            '//     "unsafe_math": true',
+            "//   },",
+            '//   "mangle": false',
+            "// }",
+        ].join("\n"));
+    });
+    it("Should reduce infinite loops with reasonable performance", function() {
+        if (semver.satisfies(process.version, "0.10")) return;
+        this.timeout(120000);
+        var code = [
+            "var a = 9007199254740992, b = 1;",
+            "",
+            "while (a++ + (1 - b) < a) {",
+            "    0;",
+            "}",
+        ].join("\n");
+        var result = reduce_test(code, {
+            compress: {
+                unsafe_math: true,
+            },
+            mangle: false,
+        });
+        if (result.error) throw result.error;
+        assert.strictEqual(result.code.replace(/ timed out after [0-9]+ms/, " timed out."), [
+            code,
+            "// output: ",
+            "// minify: Error: Script execution timed out.",
+            "// options: {",
+            '//   "compress": {',
+            '//     "unsafe_math": true',
+            "//   },",
+            '//   "mangle": false',
+            "// }",
+        ].join("\n"));
+    });
+});

test/mocha/release.js

@@ -1,50 +0,0 @@
-var assert = require("assert");
-var semver = require("semver");
-var spawn = require("child_process").spawn;
-
-if (!process.env.UGLIFYJS_TEST_ALL) return;
-
-function run(command, args, done) {
-    spawn(command, args, {
-        stdio: [ "ignore", 1, 2 ]
-    }).on("exit", function(code) {
-        assert.strictEqual(code, 0);
-        done();
-    });
-}
-
-describe("test/benchmark.js", function() {
-    this.timeout(10 * 60 * 1000);
-    [
-        "-b",
-        "-b braces",
-        "-m",
-        "-mc passes=3",
-        "-mc passes=3,toplevel",
-        "-mc passes=3,unsafe",
-        "-mc keep_fargs=false,passes=3",
-        "-mc keep_fargs=false,passes=3,pure_getters,unsafe,unsafe_comps,unsafe_math,unsafe_proto",
-    ].forEach(function(options) {
-        it("Should pass with options " + options, function(done) {
-            var args = options.split(/ /);
-            args.unshift("test/benchmark.js");
-            run(process.argv[0], args, done);
-        });
-    });
-});
-
-if (semver.satisfies(process.version, "0.12")) return;
-describe("test/jetstream.js", function() {
-    this.timeout(20 * 60 * 1000);
-    [
-        "-mc",
-        "-mc keep_fargs=false,passes=3,pure_getters,unsafe,unsafe_comps,unsafe_math,unsafe_proto",
-    ].forEach(function(options) {
-        it("Should pass with options " + options, function(done) {
-            var args = options.split(/ /);
-            args.unshift("test/jetstream.js");
-            args.push("-b", "beautify=false,webkit");
-            run(process.argv[0], args, done);
-        });
-    });
-});

test/mocha/sourcemaps.js

@@ -1,7 +1,7 @@
 var assert = require("assert");
 var readFileSync = require("fs").readFileSync;
 var SourceMapConsumer = require("source-map").SourceMapConsumer;
-var UglifyJS = require("../..");
+var UglifyJS = require("../node");
 
 function read(path) {
     return readFileSync(path, "utf8");
@@ -118,51 +118,33 @@ describe("sourcemaps", function() {
             assert.strictEqual(result.code + "\n", readFileSync("test/input/issue-520/output.js", "utf8"));
         });
         it("Should warn for missing inline source map", function() {
-            var warn_function = UglifyJS.AST_Node.warn_function;
-            var warnings = [];
-            UglifyJS.AST_Node.warn_function = function(txt) {
-                warnings.push(txt);
-            };
-            try {
-                var result = UglifyJS.minify(read("./test/input/issue-1323/sample.js"), {
-                    mangle: false,
-                    sourceMap: {
-                        content: "inline"
-                    }
-                });
-                assert.strictEqual(result.code, "var bar=function(bar){return bar};");
-                assert.strictEqual(warnings.length, 1);
-                assert.strictEqual(warnings[0], "inline source map not found: 0");
-            } finally {
-                UglifyJS.AST_Node.warn_function = warn_function;
-            }
+            var result = UglifyJS.minify(read("./test/input/issue-1323/sample.js"), {
+                mangle: false,
+                sourceMap: {
+                    content: "inline"
+                },
+                warnings: true,
+            });
+            assert.strictEqual(result.code, "var bar=function(bar){return bar};");
+            assert.deepEqual(result.warnings, [ "WARN: inline source map not found: 0" ]);
         });
         it("Should handle multiple input and inline source map", function() {
-            var warn_function = UglifyJS.AST_Node.warn_function;
-            var warnings = [];
-            UglifyJS.AST_Node.warn_function = function(txt) {
-                warnings.push(txt);
-            };
-            try {
-                var result = UglifyJS.minify([
-                    read("./test/input/issue-520/input.js"),
-                    read("./test/input/issue-1323/sample.js"),
-                ], {
-                    sourceMap: {
-                        content: "inline",
-                        url: "inline",
-                    }
-                });
-                if (result.error) throw result.error;
-                assert.strictEqual(result.code, [
-                    "var Foo=function(){console.log(3)};new Foo;var bar=function(o){return o};",
-                    "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIiwiMSJdLCJuYW1lcyI6WyJGb28iLCJjb25zb2xlIiwibG9nIiwiYmFyIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFNQSxJQUFJLFdBQWdCQyxRQUFRQyxJQUFJLElBQVMsSUFBSUYsSUNBbkQsSUFBSUcsSUFDQSxTQUFjQSxHQUNWLE9BQU9BIn0=",
-                ].join("\n"));
-                assert.strictEqual(warnings.length, 1);
-                assert.strictEqual(warnings[0], "inline source map not found: 1");
-            } finally {
-                UglifyJS.AST_Node.warn_function = warn_function;
-            }
+            var result = UglifyJS.minify([
+                read("./test/input/issue-520/input.js"),
+                read("./test/input/issue-1323/sample.js"),
+            ], {
+                sourceMap: {
+                    content: "inline",
+                    url: "inline",
+                },
+                warnings: true,
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, [
+                "var Foo=function(){console.log(3)};new Foo;var bar=function(o){return o};",
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInN0ZGluIiwiMSJdLCJuYW1lcyI6WyJGb28iLCJjb25zb2xlIiwibG9nIiwiYmFyIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFNQSxJQUFJLFdBQWdCQyxRQUFRQyxJQUFJLElBQVMsSUFBSUYsSUNBbkQsSUFBSUcsSUFDQSxTQUFjQSxHQUNWLE9BQU9BIn0=",
+            ].join("\n"));
+            assert.deepEqual(result.warnings, [ "WARN: inline source map not found: 1" ]);
         });
         it("Should drop source contents for includeSources=false", function() {
             var result = UglifyJS.minify(read("./test/input/issue-520/input.js"), {
@@ -187,6 +169,30 @@ describe("sourcemaps", function() {
             map = JSON.parse(result.map);
             assert.ok(!("sourcesContent" in map));
         });
+        it("Should parse the correct sourceMappingURL", function() {
+            var result = UglifyJS.minify(read("./test/input/issue-3294/input.js"), {
+                compress: { toplevel: true },
+                sourceMap: {
+                    content: "inline",
+                    includeSources: true,
+                    url: "inline"
+                }
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code + "\n", readFileSync("test/input/issue-3294/output.js", "utf8"));
+        });
+        it("Should work in presence of unrecognised annotations", function() {
+            var result = UglifyJS.minify(read("./test/input/issue-3441/input.js"), {
+                compress: false,
+                mangle: false,
+                sourceMap: {
+                    content: "inline",
+                },
+            });
+            if (result.error) throw result.error;
+            assert.strictEqual(result.code, '(function(){console.log("hello")}).call(this);');
+            assert.strictEqual(result.map, '{"version":3,"sources":["main.coffee"],"names":["console","log"],"mappings":"CAAA,WAAAA,QAAQC,IAAI"}');
+        });
     });
 
     describe("sourceMapInline", function() {
@@ -238,7 +244,7 @@ describe("sourcemaps", function() {
             assert.strictEqual(map.sourcesContent.length, 1);
             assert.strictEqual(map.sourcesContent[0], code);
             var encoded = result.code.slice(result.code.lastIndexOf(",") + 1);
-            map = JSON.parse(new Buffer(encoded, "base64").toString());
+            map = JSON.parse(UglifyJS.to_ascii(encoded));
             assert.strictEqual(map.sourcesContent.length, 1);
             assert.strictEqual(map.sourcesContent[0], code);
             result = UglifyJS.minify(result.code, {

test/mocha/spidermonkey.js

@@ -10,7 +10,9 @@ describe("spidermonkey export/import sanity test", function() {
         var command = uglifyjs + " --self -cm --wrap SpiderUglify -o spidermonkey | " +
             uglifyjs + " -p spidermonkey -cm";
 
-        exec(command, function(err, stdout) {
+        exec(command, {
+            maxBuffer: 1048576
+        }, function(err, stdout) {
             if (err) throw err;
 
             eval(stdout);

test/mocha/string-literal.js

@@ -59,13 +59,13 @@ describe("String literals", function() {
 
     it("Should not throw error outside strict mode if string contains escaped octalIntegerLiteral", function() {
         var tests = [
-            ['"\\76";', ';">";'],
-            ['"\\0"', '"\\0";'],
-            ['"\\08"', '"\\x008";'],
-            ['"\\008"', '"\\x008";'],
-            ['"\\0008"', '"\\x008";'],
-            ['"use strict" === "use strict";\n"\\76";', '"use strict"==="use strict";">";'],
-            ['"use\\\n strict";\n"\\07";', ';"use strict";"\07";']
+            [ ';"\\76";', ';">";' ],
+            [ ';"\\0";', ';"\\0";' ],
+            [ ';"\\08"', ';"\\x008";' ],
+            [ ';"\\008"', ';"\\x008";' ],
+            [ ';"\\0008"', ';"\\x008";' ],
+            [ ';"use\\\n strict";\n"\\07";', ';"use strict";"\07";' ],
+            [ '"use strict" === "use strict";\n"\\76";', '"use strict"==="use strict";">";' ],
         ];
 
         for (var test in tests) {
@@ -75,8 +75,8 @@ describe("String literals", function() {
     });
 
     it("Should not throw error when digit is 8 or 9", function() {
-        assert.equal(UglifyJS.parse('"use strict";"\\08"').print_to_string(), '"use strict";"\\x008";');
-        assert.equal(UglifyJS.parse('"use strict";"\\09"').print_to_string(), '"use strict";"\\x009";');
+        assert.equal(UglifyJS.parse('"use strict";;"\\08"').print_to_string(), '"use strict";;"\\x008";');
+        assert.equal(UglifyJS.parse('"use strict";;"\\09"').print_to_string(), '"use strict";;"\\x009";');
     });
 
     it("Should not unescape unpaired surrogates", function() {
@@ -93,7 +93,7 @@ describe("String literals", function() {
         for (; i <= 0xFFFF; i++) {
             code.push("\\u" + i.toString(16));
         }
-        code = '"' + code.join() + '"';
+        code = ';"' + code.join() + '"';
         var normal = UglifyJS.minify(code, {
             compress: false,
             mangle: false,

test/reduce.js

@@ -0,0 +1,564 @@
+var crypto = require("crypto");
+var U = require("./node");
+var List = U.List;
+var os = require("os");
+var sandbox = require("./sandbox");
+
+// Reduce a ufuzz-style `console.log` based test case by iteratively replacing
+// AST nodes with various permutations. Each AST_Statement in the tree is also
+// speculatively dropped to determine whether it is needed.  If the altered
+// tree and the last known good tree produce the same non-nil error-free output
+// after being run, then the permutation survives to the next generation and
+// is the basis for subsequent iterations.  The test case is reduced as a
+// consequence of complex expressions being replaced with simpler ones.
+// This function assumes that the testcase will not result in a parse or
+// runtime Error.  Note that a reduced test case will have different runtime
+// output - it is not functionally equivalent to the original. The only criteria
+// is that once the generated reduced test case is run without minification, it
+// will produce different output from the code minified with `minify_options`.
+// Returns a `minify` result object with an additonal boolean property `reduced`.
+
+module.exports = function reduce_test(testcase, minify_options, reduce_options) {
+    if (testcase instanceof U.AST_Node) testcase = testcase.print_to_string();
+    minify_options = minify_options || { compress: {}, mangle: false };
+    reduce_options = reduce_options || {};
+    var max_iterations = reduce_options.max_iterations || 1000;
+    var max_timeout = reduce_options.max_timeout || 10000;
+    var verbose = reduce_options.verbose;
+    var minify_options_json = JSON.stringify(minify_options, null, 2);
+    var result_cache = Object.create(null);
+    // the initial timeout to assess the viability of the test case must be large
+    var differs = producesDifferentResultWhenMinified(result_cache, testcase, minify_options, max_timeout);
+
+    if (verbose) {
+        console.error("// Node.js " + process.version + " on " + os.platform() + " " + os.arch());
+    }
+    if (!differs) {
+        // same stdout result produced when minified
+        return {
+            code: "// Can't reproduce test failure with minify options provided:"
+                + "\n// " + to_comment(minify_options_json)
+        };
+    } else if (differs.timed_out) {
+        return {
+            code: "// Can't reproduce test failure within " + max_timeout + "ms:"
+                + "\n// " + to_comment(minify_options_json)
+        };
+    } else if (differs.error) {
+        return differs;
+    } else {
+        max_timeout = Math.min(100 * differs.elapsed, max_timeout);
+        // Replace expressions with constants that will be parsed into
+        // AST_Nodes as required.  Each AST_Node has its own permutation count,
+        // so these replacements can't be shared.
+        // Although simpler replacements are generally faster and better,
+        // feel free to experiment with a different replacement set.
+        var REPLACEMENTS = [
+            // "null", "''", "false", "'foo'", "undefined", "9",
+            "1", "0",
+        ];
+
+        // There's a relationship between each node's _permute counter and
+        // REPLACEMENTS.length which is why fractional _permutes were needed.
+        // One could scale all _permute operations by a factor of `steps`
+        // to only deal with integer operations, but this works well enough.
+        var steps = 4;        // must be a power of 2
+        var step = 1 / steps; // 0.25 is exactly representable in floating point
+
+        var tt = new U.TreeTransformer(function(node, descend, in_list) {
+            if (CHANGED) return;
+
+            // quick ignores
+            if (node instanceof U.AST_Accessor) return;
+            if (node instanceof U.AST_Directive) return;
+            if (node instanceof U.AST_Label) return;
+            if (node instanceof U.AST_LabelRef) return;
+            if (!in_list && node instanceof U.AST_SymbolDeclaration) return;
+            if (node instanceof U.AST_Toplevel) return;
+
+            var parent = tt.parent();
+
+            // ensure that the _permute prop is a number.
+            // can not use `node.start._permute |= 0;` as it will erase fractional part.
+            if (typeof node.start._permute === "undefined") node.start._permute = 0;
+
+            // if node reached permutation limit - skip over it.
+            // no structural AST changes before this point.
+            if (node.start._permute >= REPLACEMENTS.length) return;
+
+            if (parent instanceof U.AST_Assign
+                    && parent.left === node
+                || parent instanceof U.AST_Unary
+                    && parent.expression === node
+                    && ["++", "--", "delete"].indexOf(parent.operator) >= 0) {
+                // ignore lvalues
+                return;
+            }
+            if ((parent instanceof U.AST_For || parent instanceof U.AST_ForIn)
+                && parent.init === node && node instanceof U.AST_Var) {
+                // preserve for (var ...)
+                return node;
+            }
+
+            // node specific permutations with no parent logic
+
+            if (node instanceof U.AST_Array) {
+                var expr = node.elements[0];
+                if (expr && !(expr instanceof U.AST_Hole)) {
+                    node.start._permute++;
+                    CHANGED = true;
+                    return expr;
+                }
+            }
+            else if (node instanceof U.AST_Binary) {
+                CHANGED = true;
+                return [
+                    node.left,
+                    node.right,
+                ][ ((node.start._permute += step) * steps | 0) % 2 ];
+            }
+            else if (node instanceof U.AST_Catch || node instanceof U.AST_Finally) {
+                // drop catch or finally block
+                node.start._permute++;
+                CHANGED = true;
+                return null;
+            }
+            else if (node instanceof U.AST_Conditional) {
+                CHANGED = true;
+                return [
+                    node.condition,
+                    node.consequent,
+                    node.alternative,
+                ][ ((node.start._permute += step) * steps | 0) % 3 ];
+            }
+            else if (node instanceof U.AST_BlockStatement) {
+                if (in_list) {
+                    node.start._permute++;
+                    CHANGED = true;
+                    return List.splice(node.body);
+                }
+            }
+            else if (node instanceof U.AST_Call) {
+                var expr = [
+                    node.expression,
+                    node.args[0],
+                    null,  // intentional
+                ][ ((node.start._permute += step) * steps | 0) % 3 ];
+                if (expr) {
+                    CHANGED = true;
+                    return expr;
+                }
+                if (node.expression instanceof U.AST_Function) {
+                    // hoist and return expressions from the IIFE function expression
+                    var body = node.expression.body;
+                    node.expression.body = [];
+                    var seq = [];
+                    body.forEach(function(node) {
+                        var expr = expr instanceof U.AST_Exit ? node.value : node.body;
+                        if (expr instanceof U.AST_Node && !is_statement(expr)) {
+                            // collect expressions from each statements' body
+                            seq.push(expr);
+                        }
+                    });
+                    CHANGED = true;
+                    return to_sequence(seq);
+                }
+            }
+            else if (node instanceof U.AST_Defun) {
+                switch (((node.start._permute += step) * steps | 0) % 2) {
+                  case 0:
+                    CHANGED = true;
+                    return List.skip;
+                  case 1:
+                    if (!has_exit(node)) {
+                        // hoist function declaration body
+                        var body = node.body;
+                        node.body = [];
+                        body.push(node); // retain function with empty body to be dropped later
+                        CHANGED = true;
+                        return List.splice(body);
+                    }
+                }
+            }
+            else if (node instanceof U.AST_DWLoop) {
+                var expr = [
+                    node.condition,
+                    node.body,
+                    null,  // intentional
+                ][ (node.start._permute * steps | 0) % 3 ];
+                node.start._permute += step;
+                if (!expr) {
+                    if (node.body[0] instanceof U.AST_Break) {
+                        if (node instanceof U.AST_Do) {
+                            CHANGED = true;
+                            return List.skip;
+                        }
+                        expr = node.condition; // AST_While - fall through
+                    }
+                }
+                if (expr && (expr !== node.body || !has_loopcontrol(expr, node, parent))) {
+                    CHANGED = true;
+                    return to_statement(expr);
+                }
+            }
+            else if (node instanceof U.AST_PropAccess) {
+                var expr = [
+                    node.expression,
+                    node.property instanceof U.AST_Node && node.property,
+                ][ node.start._permute++ % 2 ];
+                if (expr) {
+                    CHANGED = true;
+                    return expr;
+                }
+            }
+            else if (node instanceof U.AST_For) {
+                var expr = [
+                    node.init,
+                    node.condition,
+                    node.step,
+                    node.body,
+                ][ (node.start._permute * steps | 0) % 4 ];
+                node.start._permute += step;
+                if (expr && (expr !== node.body || !has_loopcontrol(expr, node, parent))) {
+                    CHANGED = true;
+                    return to_statement(expr);
+                }
+            }
+            else if (node instanceof U.AST_ForIn) {
+                var expr = [
+                    node.init,
+                    node.object,
+                    node.body,
+                ][ (node.start._permute * steps | 0) % 3 ];
+                node.start._permute += step;
+                if (expr && (expr !== node.body || !has_loopcontrol(expr, node, parent))) {
+                    CHANGED = true;
+                    return to_statement(expr);
+                }
+            }
+            else if (node instanceof U.AST_If) {
+                var expr = [
+                    node.condition,
+                    node.body,
+                    node.alternative,
+                ][ (node.start._permute * steps | 0) % 3 ];
+                node.start._permute += step;
+                if (expr) {
+                    // replace if statement with its condition, then block or else block
+                    CHANGED = true;
+                    return to_statement(expr);
+                }
+            }
+            else if (node instanceof U.AST_Object) {
+                // first property's value
+                var expr = node.properties[0] instanceof U.AST_ObjectKeyVal && node.properties[0].value;
+                if (expr) {
+                    node.start._permute++;
+                    CHANGED = true;
+                    return expr;
+                }
+            }
+            else if (node instanceof U.AST_SimpleStatement) {
+                if (node.body instanceof U.AST_Call && node.body.expression instanceof U.AST_Function) {
+                    // hoist simple statement IIFE function expression body
+                    node.start._permute++;
+                    if (!has_exit(node.body.expression)) {
+                        var body = node.body.expression.body;
+                        node.body.expression.body = [];
+                        CHANGED = true;
+                        return List.splice(body);
+                    }
+                }
+            }
+            else if (node instanceof U.AST_Switch) {
+                var expr = [
+                    node.expression,                         // switch expression
+                    node.body[0] && node.body[0].expression, // first case expression or undefined
+                    node.body[0] && node.body[0],            // first case body or undefined
+                ][ (node.start._permute * steps | 0) % 4 ];
+                node.start._permute += step;
+                if (expr && (!(expr instanceof U.AST_Statement) || !has_loopcontrol(expr, node, parent))) {
+                    CHANGED = true;
+                    return expr instanceof U.AST_SwitchBranch ? new U.AST_BlockStatement({
+                        body: expr.body.slice(),
+                        start: {},
+                    }) : to_statement(expr);
+                }
+            }
+            else if (node instanceof U.AST_Try) {
+                var body = [
+                    node.body,
+                    node.bcatch && node.bcatch.body,
+                    node.bfinally && node.bfinally.body,
+                    null,  // intentional
+                ][ (node.start._permute * steps | 0) % 4 ];
+                node.start._permute += step;
+                if (body) {
+                    // replace try statement with try block, catch block, or finally block
+                    CHANGED = true;
+                    return new U.AST_BlockStatement({
+                        body: body,
+                        start: {},
+                    });
+                } else {
+                    // replace try with a break or return if first in try statement
+                    if (node.body[0] instanceof U.AST_Break
+                        || node.body[0] instanceof U.AST_Return) {
+                        CHANGED = true;
+                        return node.body[0];
+                    }
+                }
+            }
+            else if (node instanceof U.AST_Unary) {
+                node.start._permute++;
+                CHANGED = true;
+                return node.expression;
+            }
+            else if (node instanceof U.AST_Var) {
+                if (node.definitions.length == 1 && node.definitions[0].value) {
+                    // first declaration value
+                    node.start._permute++;
+                    CHANGED = true;
+                    return to_statement(node.definitions[0].value);
+                }
+            }
+            else if (node instanceof U.AST_LabeledStatement) {
+                if (node.body instanceof U.AST_Statement
+                    && !has_loopcontrol(node.body, node.body, node)) {
+                    // replace labelled statement with its non-labelled body
+                    node.start._permute = REPLACEMENTS.length;
+                    CHANGED = true;
+                    return node.body;
+                }
+            }
+
+            if (in_list) {
+                // special case to drop object properties and switch branches
+                if (parent instanceof U.AST_Object
+                    || parent instanceof U.AST_Switch && parent.expression != node) {
+                    node.start._permute++;
+                    CHANGED = true;
+                    return List.skip;
+                }
+
+                // replace or skip statement
+                if (node instanceof U.AST_Statement) {
+                    node.start._permute++;
+                    CHANGED = true;
+                    return List.skip;
+                }
+
+                // remove this node unless its the sole element of a (transient) sequence
+                if (!(parent instanceof U.AST_Sequence) || parent.expressions.length > 1) {
+                    node.start._permute++;
+                    CHANGED = true;
+                    return List.skip;
+                }
+            }
+
+            // replace this node
+            var newNode = U.parse(REPLACEMENTS[node.start._permute % REPLACEMENTS.length | 0], {
+                expression: true,
+            });
+            if (is_statement(node)) {
+                newNode = new U.AST_SimpleStatement({
+                    body: newNode,
+                    start: {},
+                });
+            }
+            newNode.start._permute = ++node.start._permute;
+            CHANGED = true;
+            return newNode;
+        }, function(node, in_list) {
+            if (node instanceof U.AST_Sequence) {
+                // expand single-element sequence
+                if (node.expressions.length == 1) return node.expressions[0];
+            }
+            else if (node instanceof U.AST_Try) {
+                // expand orphaned try block
+                if (!node.bcatch && !node.bfinally) return new U.AST_BlockStatement({
+                    body: node.body,
+                    start: {},
+                });
+            }
+            else if (node instanceof U.AST_Var) {
+                // remove empty var statement
+                if (node.definitions.length == 0) return in_list ? List.skip : new U.AST_EmptyStatement({
+                    start: {},
+                });
+            }
+        });
+
+        for (var pass = 1; pass <= 3; ++pass) {
+            var testcase_ast = U.parse(testcase);
+            testcase_ast.walk(new U.TreeWalker(function(node) {
+                // unshare start props to retain visit data between iterations
+                node.start = JSON.parse(JSON.stringify(node.start));
+                node.start._permute = 0;
+            }));
+            for (var c = 0; c < max_iterations; ++c) {
+                if (verbose) {
+                    if (pass == 1 && c % 25 == 0) {
+                        console.error("// reduce test pass "
+                            + pass + ", iteration " + c + ": " + testcase.length + " bytes");
+                    }
+                }
+                var CHANGED = false;
+                var code_ast = testcase_ast.clone(true).transform(tt);
+                if (!CHANGED) break;
+                try {
+                    var code = code_ast.print_to_string();
+                } catch (ex) {
+                    // AST is not well formed.
+                    // no harm done - just log the error, ignore latest change and continue iterating.
+                    console.error("*** Error generating code from AST.");
+                    console.error(ex);
+                    console.error("*** Discarding permutation and continuing.");
+                    continue;
+                }
+                var diff = producesDifferentResultWhenMinified(result_cache, code, minify_options, max_timeout);
+                if (diff) {
+                    if (diff.timed_out) {
+                        // can't trust the validity of `code_ast` and `code` when timed out.
+                        // no harm done - just ignore latest change and continue iterating.
+                    } else if (diff.error) {
+                        // something went wrong during minify() - could be malformed AST or genuine bug.
+                        // no harm done - just log code & error, ignore latest change and continue iterating.
+                        console.error("*** Error during minification.");
+                        console.error(code);
+                        console.error(diff.error);
+                        console.error("*** Discarding permutation and continuing.");
+                    } else if (is_error(diff.unminified_result)
+                        && is_error(diff.minified_result)
+                        && diff.unminified_result.name == diff.minified_result.name) {
+                        // ignore difference in error messages caused by minification
+                    } else {
+                        // latest permutation is valid, so use it as the basis of new changes
+                        testcase_ast = code_ast;
+                        testcase = code;
+                        differs = diff;
+                    }
+                }
+            }
+            if (c == 0) break;
+            if (verbose) {
+                console.error("// reduce test pass " + pass + ": " + testcase.length + " bytes");
+            }
+        }
+        testcase = U.minify(testcase, {
+            compress: false,
+            mangle: false,
+            output: {
+                beautify: true,
+                braces: true,
+                comments: true,
+            },
+        });
+        testcase.code += [
+            "",
+            "// output: " + to_comment(differs.unminified_result),
+            "// minify: " + to_comment(differs.minified_result),
+            "// options: " + to_comment(minify_options_json),
+        ].join("\n").replace(/\u001b\[\d+m/g, "");
+        return testcase;
+    }
+};
+
+function to_comment(value) {
+    return ("" + value).replace(/\n/g, "\n// ");
+}
+
+function has_exit(fn) {
+    var found = false;
+    var tw = new U.TreeWalker(function(node) {
+        if (found) return found;
+        if (node instanceof U.AST_Exit) {
+            return found = true;
+        }
+        if (node instanceof U.AST_Scope && node !== fn) {
+            return true; // don't descend into nested functions
+        }
+    });
+    fn.walk(tw);
+    return found;
+}
+
+function has_loopcontrol(body, loop, label) {
+    var found = false;
+    var tw = new U.TreeWalker(function(node) {
+        if (found) return true;
+        if (node instanceof U.AST_LoopControl && this.loopcontrol_target(node) === loop) {
+            return found = true;
+        }
+    });
+    if (label instanceof U.AST_LabeledStatement) tw.push(label);
+    tw.push(loop);
+    body.walk(tw);
+    return found;
+}
+
+function is_error(result) {
+    return typeof result == "object" && typeof result.name == "string" && typeof result.message == "string";
+}
+
+function is_timed_out(result) {
+    return is_error(result) && /timed out/.test(result);
+}
+
+function is_statement(node) {
+    return node instanceof U.AST_Statement && !(node instanceof U.AST_Function);
+}
+
+function merge_sequence(array, node) {
+    if (node instanceof U.AST_Sequence) {
+        array.push.apply(array, node.expressions);
+    } else {
+        array.push(node);
+    }
+    return array;
+}
+
+function to_sequence(expressions) {
+    if (expressions.length == 0) return new U.AST_Number({value: 0, start: {}});
+    if (expressions.length == 1) return expressions[0];
+    return new U.AST_Sequence({
+        expressions: expressions.reduce(merge_sequence, []),
+        start: {},
+    });
+}
+
+function to_statement(node) {
+    return is_statement(node) ? node : new U.AST_SimpleStatement({
+        body: node,
+        start: {},
+    });
+}
+
+function run_code(result_cache, code, toplevel, timeout) {
+    var key = crypto.createHash("sha1").update(code).digest("base64");
+    return result_cache[key] || (result_cache[key] = sandbox.run_code(code, toplevel, timeout));
+}
+
+function producesDifferentResultWhenMinified(result_cache, code, minify_options, max_timeout) {
+    var minified = U.minify(code, minify_options);
+    if (minified.error) return minified;
+
+    var toplevel = minify_options.toplevel;
+    var elapsed = Date.now();
+    var unminified_result = run_code(result_cache, code, toplevel, max_timeout);
+    elapsed = Date.now() - elapsed;
+    var timeout = Math.min(100 * elapsed, max_timeout);
+    var minified_result = run_code(result_cache, minified.code, toplevel, timeout);
+
+    if (sandbox.same_stdout(unminified_result, minified_result)) {
+        return is_timed_out(unminified_result) && is_timed_out(minified_result) && {
+            timed_out: true,
+        };
+    }
+    return {
+        unminified_result: unminified_result,
+        minified_result: minified_result,
+        elapsed: elapsed,
+    };
+}
+Error.stackTraceLimit = Infinity;

test/release/benchmark.js

@@ -0,0 +1,17 @@
+setInterval(function() {
+    process.stderr.write("\0");
+}, 8 * 60 * 1000).unref();
+require("./run")([
+    "-b",
+    "-b braces",
+    "-m",
+    "-mc passes=3",
+    "-mc passes=3,toplevel",
+    "-mc passes=3,unsafe",
+    "-mc keep_fargs=false,passes=3",
+    "-mc keep_fargs=false,passes=3,pure_getters,unsafe,unsafe_comps,unsafe_math,unsafe_proto",
+].map(function(options) {
+    var args = options.split(/ /);
+    args.unshift("test/benchmark.js");
+    return args;
+}));

test/release/jetstream.js

@@ -0,0 +1,9 @@
+require("./run")([
+    "-mc",
+    "-mc keep_fargs=false,passes=3,pure_getters,unsafe,unsafe_comps,unsafe_math,unsafe_proto",
+].map(function(options) {
+    var args = options.split(/ /);
+    args.unshift("test/jetstream.js");
+    args.push("-b", "beautify=false,webkit");
+    return args;
+}));

test/release/run.js

@@ -0,0 +1,16 @@
+var child_process = require("child_process");
+
+module.exports = function(tasks) {
+    (function next() {
+        if (!tasks.length) return;
+        var args = tasks.shift();
+        console.log();
+        console.log("\u001B[36m$> " + args.join(" ") + "\u001B[39m");
+        child_process.spawn(process.argv[0], args, {
+            stdio: [ "ignore", 1, 2 ]
+        }).on("exit", function(code) {
+            if (code) process.exit(code);
+            next();
+        });
+    })();
+};

test/run-tests.js

@@ -1,367 +0,0 @@
-#! /usr/bin/env node
-
-var U = require("./node");
-var path = require("path");
-var fs = require("fs");
-var assert = require("assert");
-var sandbox = require("./sandbox");
-var semver = require("semver");
-
-var tests_dir = path.dirname(module.filename);
-var failures = 0;
-var failed_files = {};
-var minify_options = require("./ufuzz.json").map(JSON.stringify);
-
-run_compress_tests();
-if (failures) {
-    console.error("\n!!! Failed " + failures + " test cases.");
-    console.error("!!! " + Object.keys(failed_files).join(", "));
-    process.exit(1);
-}
-console.log();
-require("./mocha.js");
-
-/* -----[ utils ]----- */
-
-function evaluate(code) {
-    if (code instanceof U.AST_Node) code = make_code(code, { beautify: true });
-    return new Function("return(" + code + ")")();
-}
-
-function log() {
-    console.log("%s", tmpl.apply(null, arguments));
-}
-
-function make_code(ast, options) {
-    var stream = U.OutputStream(options);
-    ast.print(stream);
-    return stream.get();
-}
-
-function parse_test(file) {
-    var script = fs.readFileSync(file, "utf8");
-    // TODO try/catch can be removed after fixing https://github.com/mishoo/UglifyJS2/issues/348
-    try {
-        var ast = U.parse(script, {
-            filename: file
-        });
-    } catch (e) {
-        console.log("Caught error while parsing tests in " + file + "\n");
-        console.log(e);
-        throw e;
-    }
-    var tests = {};
-    var tw = new U.TreeWalker(function(node, descend) {
-        if (node instanceof U.AST_LabeledStatement
-            && tw.parent() instanceof U.AST_Toplevel) {
-            var name = node.label.name;
-            if (name in tests) {
-                throw new Error('Duplicated test name "' + name + '" in ' + file);
-            }
-            tests[name] = get_one_test(name, node.body);
-            return true;
-        }
-        if (!(node instanceof U.AST_Toplevel)) croak(node);
-    });
-    ast.walk(tw);
-    return tests;
-
-    function croak(node) {
-        throw new Error(tmpl("Can't understand test file {file} [{line},{col}]\n{code}", {
-            file: file,
-            line: node.start.line,
-            col: node.start.col,
-            code: make_code(node, { beautify: false })
-        }));
-    }
-
-    function read_string(stat) {
-        if (stat.TYPE == "SimpleStatement") {
-            var body = stat.body;
-            switch(body.TYPE) {
-              case "String":
-                return body.value;
-              case "Array":
-                return body.elements.map(function(element) {
-                    if (element.TYPE !== "String")
-                        throw new Error("Should be array of strings");
-                    return element.value;
-                }).join("\n");
-            }
-        }
-        throw new Error("Should be string or array of strings");
-    }
-
-    function get_one_test(name, block) {
-        var test = { name: name, options: {} };
-        var tw = new U.TreeWalker(function(node, descend) {
-            if (node instanceof U.AST_Assign) {
-                if (!(node.left instanceof U.AST_SymbolRef)) {
-                    croak(node);
-                }
-                var name = node.left.name;
-                test[name] = evaluate(node.right);
-                return true;
-            }
-            if (node instanceof U.AST_LabeledStatement) {
-                var label = node.label;
-                assert.ok([
-                    "input",
-                    "expect",
-                    "expect_exact",
-                    "expect_warnings",
-                    "expect_stdout",
-                    "node_version",
-                ].indexOf(label.name) >= 0, tmpl("Unsupported label {name} [{line},{col}]", {
-                    name: label.name,
-                    line: label.start.line,
-                    col: label.start.col
-                }));
-                var stat = node.body;
-                if (label.name == "expect_exact" || label.name == "node_version") {
-                    test[label.name] = read_string(stat);
-                } else if (label.name == "expect_stdout") {
-                    var body = stat.body;
-                    if (body instanceof U.AST_Boolean) {
-                        test[label.name] = body.value;
-                    } else if (body instanceof U.AST_Call) {
-                        var ctor = global[body.expression.name];
-                        assert.ok(ctor === Error || ctor.prototype instanceof Error, tmpl("Unsupported expect_stdout format [{line},{col}]", {
-                            line: label.start.line,
-                            col: label.start.col
-                        }));
-                        test[label.name] = ctor.apply(null, body.args.map(function(node) {
-                            assert.ok(node instanceof U.AST_Constant, tmpl("Unsupported expect_stdout format [{line},{col}]", {
-                                line: label.start.line,
-                                col: label.start.col
-                            }));
-                            return node.value;
-                        }));
-                    } else {
-                        test[label.name] = read_string(stat) + "\n";
-                    }
-                } else {
-                    test[label.name] = stat;
-                }
-                return true;
-            }
-        });
-        block.walk(tw);
-        return test;
-    }
-}
-
-// Try to reminify original input with standard options
-// to see if it matches expect_stdout.
-function reminify(orig_options, input_code, input_formatted, expect_stdout) {
-    for (var i = 0; i < minify_options.length; i++) {
-        var options = JSON.parse(minify_options[i]);
-        if (options.compress) [
-            "keep_fargs",
-            "keep_fnames",
-        ].forEach(function(name) {
-            if (name in orig_options) {
-                options.compress[name] = orig_options[name];
-            }
-        });
-        var options_formatted = JSON.stringify(options, null, 4);
-        var result = U.minify(input_code, options);
-        if (result.error) {
-            log("!!! failed input reminify\n---INPUT---\n{input}\n---OPTIONS---\n{options}\n--ERROR---\n{error}\n\n", {
-                input: input_formatted,
-                options: options_formatted,
-                error: result.error,
-            });
-            return false;
-        } else {
-            var stdout = run_code(result.code);
-            if (typeof expect_stdout != "string" && typeof stdout != "string" && expect_stdout.name == stdout.name) {
-                stdout = expect_stdout;
-            }
-            if (!sandbox.same_stdout(expect_stdout, stdout)) {
-                log("!!! failed running reminified input\n---INPUT---\n{input}\n---OPTIONS---\n{options}\n---OUTPUT---\n{output}\n---EXPECTED {expected_type}---\n{expected}\n---ACTUAL {actual_type}---\n{actual}\n\n", {
-                    input: input_formatted,
-                    options: options_formatted,
-                    output: result.code,
-                    expected_type: typeof expect_stdout == "string" ? "STDOUT" : "ERROR",
-                    expected: expect_stdout,
-                    actual_type: typeof stdout == "string" ? "STDOUT" : "ERROR",
-                    actual: stdout,
-                });
-                return false;
-            }
-        }
-    }
-    return true;
-}
-
-function run_code(code) {
-    var result = sandbox.run_code(code, true);
-    return typeof result == "string" ? result.replace(/\u001b\[\d+m/g, "") : result;
-}
-
-function run_compress_tests() {
-    var dir = path.resolve(tests_dir, "compress");
-    fs.readdirSync(dir).filter(function(name) {
-        return /\.js$/i.test(name);
-    }).forEach(function(file) {
-        log("--- {file}", { file: file });
-        function test_case(test) {
-            log("    Running test [{name}]", { name: test.name });
-            var output_options = test.beautify || {};
-            var expect;
-            if (test.expect) {
-                expect = make_code(to_toplevel(test.expect, test.mangle), output_options);
-            } else {
-                expect = test.expect_exact;
-            }
-            var input = to_toplevel(test.input, test.mangle);
-            var input_code = make_code(input);
-            var input_formatted = make_code(test.input, {
-                beautify: true,
-                quote_style: 3,
-                keep_quoted_props: true
-            });
-            try {
-                U.parse(input_code);
-            } catch (ex) {
-                log("!!! Cannot parse input\n---INPUT---\n{input}\n--PARSE ERROR--\n{error}\n\n", {
-                    input: input_formatted,
-                    error: ex,
-                });
-                return false;
-            }
-            var options = U.defaults(test.options, {
-                warnings: false
-            });
-            var warnings_emitted = [];
-            var original_warn_function = U.AST_Node.warn_function;
-            if (test.expect_warnings) {
-                U.AST_Node.warn_function = function(text) {
-                    warnings_emitted.push("WARN: " + text);
-                };
-                if (!options.warnings) options.warnings = true;
-            }
-            if (test.mangle && test.mangle.properties && test.mangle.properties.keep_quoted) {
-                var quoted_props = test.mangle.properties.reserved;
-                if (!Array.isArray(quoted_props)) quoted_props = [];
-                test.mangle.properties.reserved = quoted_props;
-                U.reserve_quoted_keys(input, quoted_props);
-            }
-            if (test.rename) {
-                input.figure_out_scope(test.mangle);
-                input.expand_names(test.mangle);
-            }
-            var cmp = new U.Compressor(options, true);
-            var output = cmp.compress(input);
-            output.figure_out_scope(test.mangle);
-            if (test.mangle) {
-                output.compute_char_frequency(test.mangle);
-                output.mangle_names(test.mangle);
-                if (test.mangle.properties) {
-                    output = U.mangle_properties(output, test.mangle.properties);
-                }
-            }
-            output = make_code(output, output_options);
-            if (expect != output) {
-                log("!!! failed\n---INPUT---\n{input}\n---OUTPUT---\n{output}\n---EXPECTED---\n{expected}\n\n", {
-                    input: input_formatted,
-                    output: output,
-                    expected: expect
-                });
-                return false;
-            }
-            // expect == output
-            try {
-                U.parse(output);
-            } catch (ex) {
-                log("!!! Test matched expected result but cannot parse output\n---INPUT---\n{input}\n---OUTPUT---\n{output}\n--REPARSE ERROR--\n{error}\n\n", {
-                    input: input_formatted,
-                    output: output,
-                    error: ex,
-                });
-                return false;
-            }
-            if (test.expect_warnings) {
-                U.AST_Node.warn_function = original_warn_function;
-                var expected_warnings = make_code(test.expect_warnings, {
-                    beautify: false,
-                    quote_style: 2, // force double quote to match JSON
-                });
-                warnings_emitted = warnings_emitted.map(function(input) {
-                    return input.split(process.cwd() + path.sep).join("").split(path.sep).join("/");
-                });
-                var actual_warnings = JSON.stringify(warnings_emitted);
-                if (expected_warnings != actual_warnings) {
-                    log("!!! failed\n---INPUT---\n{input}\n---EXPECTED WARNINGS---\n{expected_warnings}\n---ACTUAL WARNINGS---\n{actual_warnings}\n\n", {
-                        input: input_formatted,
-                        expected_warnings: expected_warnings,
-                        actual_warnings: actual_warnings,
-                    });
-                    return false;
-                }
-            }
-            if (test.expect_stdout
-                && (!test.node_version || semver.satisfies(process.version, test.node_version))) {
-                var stdout = run_code(input_code);
-                if (test.expect_stdout === true) {
-                    test.expect_stdout = stdout;
-                }
-                if (!sandbox.same_stdout(test.expect_stdout, stdout)) {
-                    log("!!! Invalid input or expected stdout\n---INPUT---\n{input}\n---EXPECTED {expected_type}---\n{expected}\n---ACTUAL {actual_type}---\n{actual}\n\n", {
-                        input: input_formatted,
-                        expected_type: typeof test.expect_stdout == "string" ? "STDOUT" : "ERROR",
-                        expected: test.expect_stdout,
-                        actual_type: typeof stdout == "string" ? "STDOUT" : "ERROR",
-                        actual: stdout,
-                    });
-                    return false;
-                }
-                stdout = run_code(output);
-                if (!sandbox.same_stdout(test.expect_stdout, stdout)) {
-                    log("!!! failed\n---INPUT---\n{input}\n---EXPECTED {expected_type}---\n{expected}\n---ACTUAL {actual_type}---\n{actual}\n\n", {
-                        input: input_formatted,
-                        expected_type: typeof test.expect_stdout == "string" ? "STDOUT" : "ERROR",
-                        expected: test.expect_stdout,
-                        actual_type: typeof stdout == "string" ? "STDOUT" : "ERROR",
-                        actual: stdout,
-                    });
-                    return false;
-                }
-                if (!reminify(test.options, input_code, input_formatted, test.expect_stdout)) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        var tests = parse_test(path.resolve(dir, file));
-        for (var i in tests) if (tests.hasOwnProperty(i)) {
-            if (!test_case(tests[i])) {
-                failures++;
-                failed_files[file] = 1;
-            }
-        }
-    });
-}
-
-function tmpl() {
-    return U.string_template.apply(null, arguments);
-}
-
-function to_toplevel(input, mangle_options) {
-    if (!(input instanceof U.AST_BlockStatement)) throw new Error("Unsupported input syntax");
-    var directive = true;
-    var offset = input.start.line;
-    var tokens = [];
-    var toplevel = new U.AST_Toplevel(input.transform(new U.TreeTransformer(function(node) {
-        if (U.push_uniq(tokens, node.start)) node.start.line -= offset;
-        if (!directive || node === input) return;
-        if (node instanceof U.AST_SimpleStatement && node.body instanceof U.AST_String) {
-            return new U.AST_Directive(node.body);
-        } else {
-            directive = false;
-        }
-    })));
-    toplevel.figure_out_scope(mangle_options);
-    return toplevel;
-}

test/sandbox.js

@@ -1,45 +1,8 @@
 var semver = require("semver");
 var vm = require("vm");
 
-function createContext() {
-    return vm.createContext(Object.defineProperty({}, "console", {
-        value: {
-            log: function(msg) {
-                if (arguments.length == 1 && typeof msg == "string") {
-                    return console.log("%s", msg);
-                }
-                return console.log.apply(console, [].map.call(arguments, function(arg) {
-                    return safe_log(arg, 3);
-                }));
-            }
-        }
-    }));
-}
-
-function safe_log(arg, level) {
-    if (arg) switch (typeof arg) {
-      case "function":
-        return arg.toString();
-      case "object":
-        if (/Error$/.test(arg.name)) return arg.toString();
-        arg.constructor.toString();
-        if (level--) for (var key in arg) {
-            var desc = Object.getOwnPropertyDescriptor(arg, key);
-            if (!desc || !desc.get) {
-                arg[key] = safe_log(arg[key], level);
-            }
-        }
-    }
-    return arg;
-}
-
-function strip_func_ids(text) {
-    return ("" + text).replace(/F[0-9]{6}N/g, "<F<>N>");
-}
-
-var context;
-var FUNC_TOSTRING = [
-    "[ Array, Boolean, Error, Function, Number, Object, RegExp, String].forEach(function(f) {",
+var setupContext = new vm.Script([
+    "[ Array, Boolean, Error, Function, Number, Object, RegExp, String ].forEach(function(f) {",
     "    f.toString = Function.prototype.toString;",
     "});",
     "Function.prototype.toString = function() {",
@@ -59,37 +22,64 @@ var FUNC_TOSTRING = [
     '        return "function(){}";',
     "    };",
     "}();",
-]).join("\n");
-exports.run_code = function(code, reuse) {
+    "this;",
+]).join("\n"));
+
+function createContext() {
+    var ctx = vm.createContext(Object.defineProperty({}, "console", { value: { log: log } }));
+    var global = setupContext.runInContext(ctx);
+    return ctx;
+
+    function safe_log(arg, level) {
+        if (arg) switch (typeof arg) {
+        case "function":
+            return arg.toString();
+        case "object":
+            if (arg === global) return "[object global]";
+            if (/Error$/.test(arg.name)) return arg.toString();
+            arg.constructor.toString();
+            if (level--) for (var key in arg) {
+                var desc = Object.getOwnPropertyDescriptor(arg, key);
+                if (!desc || !desc.get) arg[key] = safe_log(arg[key], level);
+            }
+        }
+        return arg;
+    }
+
+    function log(msg) {
+        if (arguments.length == 1 && typeof msg == "string") return console.log("%s", msg);
+        return console.log.apply(console, [].map.call(arguments, function(arg) {
+            return safe_log(arg, 3);
+        }));
+    }
+}
+
+exports.run_code = function(code, toplevel, timeout) {
+    timeout = timeout || 5000;
     var stdout = "";
     var original_write = process.stdout.write;
     process.stdout.write = function(chunk) {
         stdout += chunk;
     };
     try {
-        if (!reuse || !context) context = createContext();
-        vm.runInContext([
-            FUNC_TOSTRING,
-            "!function() {",
-            code,
-            "}();",
-        ].join("\n"), context, { timeout: 5000 });
+        vm.runInContext(toplevel ? "(function(){" + code + "})()" : code, createContext(), { timeout: timeout });
         return stdout;
     } catch (ex) {
         return ex;
     } finally {
         process.stdout.write = original_write;
-        if (!reuse || code.indexOf(".prototype") >= 0) {
-            context = null;
-        } else for (var key in context) {
-            delete context[key];
-        }
     }
 };
+
+function strip_func_ids(text) {
+    return ("" + text).replace(/F[0-9]{6}N/g, "<F<>N>");
+}
+
 exports.same_stdout = semver.satisfies(process.version, "0.12") ? function(expected, actual) {
     if (typeof expected != typeof actual) return false;
-    if (typeof expected != "string") {
-        if (expected.name != actual.name) return false;
+    if (typeof expected == "object" && typeof expected.name == "string" && typeof expected.message == "string") {
+        if (expected.name !== actual.name) return false;
+        if (typeof actual.message != "string") return false;
         expected = expected.message.slice(expected.message.lastIndexOf("\n") + 1);
         actual = actual.message.slice(actual.message.lastIndexOf("\n") + 1);
     }

test/travis-ufuzz.js

@@ -1,81 +0,0 @@
-"use strict";
-
-var child_process = require("child_process");
-var https = require("https");
-var url = require("url");
-
-var period = 45 * 60 * 1000;
-var wait = 2 * 60 * 1000;
-var ping = 5 * 60 * 1000;
-if (process.argv[2] == "run") {
-    var endTime = Date.now() + period;
-    for (var i = 0; i < 2; i++) spawn(endTime);
-} else if (process.argv.length > 2) {
-    var token = process.argv[2];
-    var branch = process.argv[3] || "v" + require("../package.json").version;
-    var repository = encodeURIComponent(process.argv[4] || "mishoo/UglifyJS2");
-    var concurrency = process.argv[5] || 1;
-    var platform = process.argv[6] || "node/latest";
-    (function request() {
-        setTimeout(request, (period + wait) / concurrency);
-        var options = url.parse("https://api.travis-ci.org/repo/" + repository + "/requests");
-        options.method = "POST";
-        options.headers = {
-            "Content-Type": "application/json",
-            "Travis-API-Version": 3,
-            "Authorization": "token " + token
-        };
-        https.request(options, function(res) {
-            console.log("HTTP", res.statusCode);
-            console.log(JSON.stringify(res.headers, null, 2));
-            console.log();
-            res.setEncoding("utf8");
-            res.on("data", console.log);
-        }).on("error", console.error).end(JSON.stringify({
-            request: {
-                message: "ufuzz testing",
-                branch: branch,
-                config: {
-                    cache: false,
-                    env: "NODEJS_VER=" + platform,
-                    script: "node test/travis-ufuzz run"
-                }
-            }
-        }));
-    })();
-} else {
-    console.log("Usage: test/travis-ufuzz.js <token> [branch] [repository] [concurrency] [platform]");
-}
-
-function spawn(endTime) {
-    var child = child_process.spawn("node", [
-        "--max-old-space-size=2048",
-        "test/ufuzz"
-    ], {
-        stdio: [ "ignore", "pipe", "pipe" ]
-    }).on("exit", respawn);
-    var line = "";
-    child.stdout.on("data", function(data) {
-        line += data;
-    });
-    child.stderr.on("data", function() {
-        process.exitCode = 1;
-    }).pipe(process.stdout);
-    var keepAlive = setInterval(function() {
-        var end = line.lastIndexOf("\r");
-        console.log(line.slice(line.lastIndexOf("\r", end - 1) + 1, end));
-        line = line.slice(end + 1);
-    }, ping);
-    var timer = setTimeout(function() {
-        clearInterval(keepAlive);
-        child.removeListener("exit", respawn);
-        child.kill();
-    }, endTime - Date.now());
-
-    function respawn() {
-        console.log(line);
-        clearInterval(keepAlive);
-        clearTimeout(timer);
-        spawn(endTime);
-    }
-}