v3.1.10

- workaround for WebKit bugs
- PhantomJS users should enable this output option

closes #2489

.github/ISSUE_TEMPLATE.md

@@ -15,6 +15,8 @@
     UglifyJS alone - without third party tools or libraries.
     Ideally the input should be as small as possible.
     Post a link to a gist if necessary.
+
+    Issues without a reproducible test case will be closed.
 -->
 
 **The `uglifyjs` CLI command executed or `minify()` options used.**

README.md

@@ -689,6 +689,12 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
   Specify `"strict"` to treat `foo.bar` as side-effect-free only when
   `foo` is certain to not throw, i.e. not `null` or `undefined`.
 
+- `reduce_funcs` (default: `true`) -- Allows single-use functions to be
+  inlined as function expressions when permissible allowing further 
+  optimization.  Enabled by default.  Option depends on `reduce_vars` 
+  being enabled.  Some code runs faster in the Chrome V8 engine if this 
+  option is disabled.  Does not negatively impact other major browsers.
+  
 - `reduce_vars` (default: `true`) -- Improve optimization on variables assigned with and
   used as constant values.
 
@@ -859,6 +865,9 @@ can pass additional arguments that control the code output:
 
 - `shebang` (default `true`) -- preserve shebang `#!` in preamble (bash scripts)
 
+- `webkit` (default `false`) -- enable workarounds for WebKit bugs.
+  PhantomJS users should set this option to `true`.
+
 - `width` (default `80`) -- only takes effect when beautification is on, this
   specifies an (orientative) line width that the beautifier will try to
   obey.  It refers to the width of the line text (excluding indentation).

bin/uglifyjs

@@ -15,7 +15,7 @@ var path = require("path");
 var program = require("commander");
 var UglifyJS = require("../tools/node");
 
-var skip_keys = [ "cname", "enclosed", "parent_scope", "scope", "thedef", "uses_eval", "uses_with" ];
+var skip_keys = [ "cname", "enclosed", "inlined", "parent_scope", "scope", "thedef", "uses_eval", "uses_with" ];
 var files = {};
 var options = {
     compress: false,

lib/ast.js

@@ -352,11 +352,11 @@ var AST_Accessor = DEFNODE("Accessor", null, {
     $documentation: "A setter/getter function.  The `name` property is always null."
 }, AST_Lambda);
 
-var AST_Function = DEFNODE("Function", null, {
+var AST_Function = DEFNODE("Function", "inlined", {
     $documentation: "A function expression"
 }, AST_Lambda);
 
-var AST_Defun = DEFNODE("Defun", null, {
+var AST_Defun = DEFNODE("Defun", "inlined", {
     $documentation: "A function definition"
 }, AST_Lambda);
 

lib/minify.js

@@ -137,11 +137,9 @@ function minify(files, options) {
         if (options.wrap) {
             toplevel = toplevel.wrap_commonjs(options.wrap);
         }
-        if (timings) timings.scope1 = Date.now();
-        if (options.compress) toplevel.figure_out_scope(options.mangle);
         if (timings) timings.compress = Date.now();
         if (options.compress) toplevel = new Compressor(options.compress).compress(toplevel);
-        if (timings) timings.scope2 = Date.now();
+        if (timings) timings.scope = Date.now();
         if (options.mangle) toplevel.figure_out_scope(options.mangle);
         if (timings) timings.mangle = Date.now();
         if (options.mangle) {
@@ -199,9 +197,9 @@ function minify(files, options) {
         if (timings) {
             timings.end = Date.now();
             result.timings = {
-                parse: 1e-3 * (timings.scope1 - timings.parse),
-                scope: 1e-3 * (timings.compress - timings.scope1 + timings.mangle - timings.scope2),
-                compress: 1e-3 * (timings.scope2 - timings.compress),
+                parse: 1e-3 * (timings.compress - timings.parse),
+                compress: 1e-3 * (timings.scope - timings.compress),
+                scope: 1e-3 * (timings.mangle - timings.scope),
                 mangle: 1e-3 * (timings.properties - timings.mangle),
                 properties: 1e-3 * (timings.output - timings.properties),
                 output: 1e-3 * (timings.end - timings.output),

lib/scope.js

@@ -46,8 +46,10 @@
 function SymbolDef(scope, index, orig) {
     this.name = orig.name;
     this.orig = [ orig ];
+    this.eliminated = 0;
     this.scope = scope;
     this.references = [];
+    this.replaced = 0;
     this.global = false;
     this.mangled_name = null;
     this.undeclared = false;

package.json

@@ -4,7 +4,7 @@
   "homepage": "http://lisperator.net/uglifyjs",
   "author": "Mihai Bazon <mihai.bazon@gmail.com> (http://lisperator.net/)",
   "license": "BSD-2-Clause",
-  "version": "3.1.6",
+  "version": "3.1.10",
   "engines": {
     "node": ">=0.8.0"
   },

test/compress/arrays.js

@@ -129,6 +129,7 @@ constant_join_3: {
 for_loop: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unsafe: true,
         unused: true,
@@ -185,6 +186,7 @@ for_loop: {
 index: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -203,6 +205,7 @@ index: {
 length: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -221,6 +224,7 @@ length: {
 index_length: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,

test/compress/collapse_vars.js

@@ -2,7 +2,8 @@ collapse_vars_side_effects_1: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1() {
@@ -150,7 +151,8 @@ collapse_vars_issue_721: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         define(["require", "exports", 'handlebars'], function (require, exports, hb) {
@@ -216,7 +218,8 @@ collapse_vars_properties: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1(obj) {
@@ -243,7 +246,8 @@ collapse_vars_if: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1() {
@@ -293,7 +297,8 @@ collapse_vars_while: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:false, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1(y) {
@@ -712,7 +717,8 @@ collapse_vars_misc1: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f0(o, a, h) {
@@ -789,7 +795,8 @@ collapse_vars_repeated: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1() {
@@ -831,7 +838,8 @@ collapse_vars_closures: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function constant_vars_can_be_replaced_in_any_scope() {
@@ -921,7 +929,8 @@ collapse_vars_try: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1() {
@@ -1118,7 +1127,8 @@ collapse_vars_constants: {
     options = {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
-        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true, reduce_vars:true
+        keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
+        reduce_funcs: true, reduce_vars:true
     }
     input: {
         function f1(x) {
@@ -1156,7 +1166,7 @@ collapse_vars_arguments: {
         collapse_vars:true, sequences:true, properties:true, dead_code:true, conditionals:true,
         comparisons:true, evaluate:true, booleans:true, loops:true, unused:true, hoist_funs:true,
         keep_fargs:true, if_return:true, join_vars:true, cascade:true, side_effects:true,
-        toplevel:true, reduce_vars:true
+        toplevel:true, reduce_funcs: true, reduce_vars:true
     }
     input: {
         var outer = function() {
@@ -1280,6 +1290,7 @@ collapse_vars_regexp: {
         hoist_funs:    true,
         keep_fargs:    true,
         loops:         false,
+        reduce_funcs:  true,
         reduce_vars:   true,
         side_effects:  true,
         unused:        true,
@@ -1355,6 +1366,7 @@ issue_1562: {
     options = {
         collapse_vars: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -1388,6 +1400,7 @@ issue_1605_1: {
     options = {
         collapse_vars: true,
         toplevel: false,
+        unused: true,
     }
     input: {
         function foo(x) {
@@ -1410,6 +1423,7 @@ issue_1605_2: {
     options = {
         collapse_vars: true,
         toplevel: "vars",
+        unused: true,
     }
     input: {
         function foo(x) {
@@ -1537,6 +1551,7 @@ issue_1631_3: {
 var_side_effects_1: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         var print = console.log.bind(console);
@@ -1559,6 +1574,7 @@ var_side_effects_1: {
 var_side_effects_2: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         var print = console.log.bind(console);
@@ -1584,6 +1600,7 @@ var_side_effects_3: {
         collapse_vars: true,
         pure_getters: true,
         unsafe: true,
+        unused: true,
     }
     input: {
         var print = console.log.bind(console);
@@ -1606,6 +1623,7 @@ var_side_effects_3: {
 reduce_vars_assign: {
     options = {
         collapse_vars: true,
+        reduce_funcs: true,
         reduce_vars: true,
     }
     input: {
@@ -1628,6 +1646,7 @@ reduce_vars_assign: {
 iife_1: {
     options = {
         collapse_vars: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -1648,6 +1667,7 @@ iife_1: {
 iife_2: {
     options = {
         collapse_vars: true,
+        reduce_funcs: false,
         reduce_vars: false,
         toplevel: true,
         unused: false,
@@ -1659,6 +1679,7 @@ iife_2: {
         }(foo);
     }
     expect: {
+        var foo;
         !function(x) {
             console.log(x);
         }(bar());
@@ -1945,6 +1966,7 @@ ref_scope: {
 chained_1: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         var a = 2;
@@ -1961,6 +1983,7 @@ chained_1: {
 chained_2: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         var a;
@@ -2061,6 +2084,7 @@ inner_lvalues: {
 double_def: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         var a = x, a = a && y;
@@ -2075,6 +2099,7 @@ double_def: {
 toplevel_single_reference: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         var a;
@@ -2084,9 +2109,10 @@ toplevel_single_reference: {
         }
     }
     expect: {
-        var a;
-        for (var b in x)
+        for (var b in x) {
+            var a;
             b(a = b);
+        }
     }
 }
 
@@ -2094,6 +2120,7 @@ unused_orig: {
     options = {
         collapse_vars: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -2132,6 +2159,7 @@ issue_315: {
         collapse_vars: true,
         evaluate: true,
         keep_fargs: false,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         unused: true,
@@ -2358,6 +2386,7 @@ duplicate_argname: {
 issue_2298: {
     options = {
         collapse_vars: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -2723,6 +2752,7 @@ issue_2364_5: {
         evaluate: true,
         pure_getters: true,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -2889,6 +2919,7 @@ pure_getters_chain: {
     options = {
         collapse_vars: true,
         pure_getters: true,
+        unused: true,
     }
     input: {
         function o(t, r) {
@@ -2909,6 +2940,7 @@ pure_getters_chain: {
 conditional_1: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         function f(a, b) {
@@ -2933,6 +2965,7 @@ conditional_1: {
 conditional_2: {
     options = {
         collapse_vars: true,
+        unused: true,
     }
     input: {
         function f(a, b) {
@@ -2949,3 +2982,599 @@ conditional_2: {
     }
     expect_stdout: "5 5"
 }
+
+issue_2425_1: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = 8;
+        (function(b) {
+            b.toString();
+        })(--a, a |= 10);
+        console.log(a);
+    }
+    expect: {
+        var a = 8;
+        (function(b) {
+            b.toString();
+        })(--a, a |= 10);
+        console.log(a);
+    }
+    expect_stdout: "15"
+}
+
+issue_2425_2: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = 8;
+        (function(b, c) {
+            b.toString();
+        })(--a, a |= 10);
+        console.log(a);
+    }
+    expect: {
+        var a = 8;
+        (function(b, c) {
+            b.toString();
+        })(--a, a |= 10);
+        console.log(a);
+    }
+    expect_stdout: "15"
+}
+
+issue_2425_3: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = 8;
+        (function(b, b) {
+            b.toString();
+        })(--a, a |= 10);
+        console.log(a);
+    }
+    expect: {
+        var a = 8;
+        (function(b, b) {
+            (a |= 10).toString();
+        })(--a);
+        console.log(a);
+    }
+    expect_stdout: "15"
+}
+
+issue_2437: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        inline: true,
+        join_vars: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        sequences: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        function foo() {
+            bar();
+        }
+        function bar() {
+            if (xhrDesc) {
+                var req = new XMLHttpRequest();
+                var result = !!req.onreadystatechange;
+                Object.defineProperty(XMLHttpRequest.prototype, 'onreadystatechange', xhrDesc || {});
+                return result;
+            }
+            else {
+                var req = new XMLHttpRequest();
+                var detectFunc = function () { };
+                req.onreadystatechange = detectFunc;
+                var result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
+                req.onreadystatechange = null;
+                return result;
+            }
+        }
+        foo();
+    }
+    expect: {
+        !function() {
+            if (xhrDesc)
+                return result = !!(req = new XMLHttpRequest()).onreadystatechange,
+                    Object.defineProperty(XMLHttpRequest.prototype, "onreadystatechange", xhrDesc || {}),
+                    result;
+            var req = new XMLHttpRequest(), detectFunc = function() {};
+            req.onreadystatechange = detectFunc;
+            var result = req[SYMBOL_FAKE_ONREADYSTATECHANGE_1] === detectFunc;
+            req.onreadystatechange = null;
+        }();
+    }
+}
+
+issue_2436_1: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log({
+            x: o.a,
+            y: o.b,
+        });
+    }
+    expect_stdout: true
+}
+
+issue_2436_2: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            o.a = 3;
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            o.a = 3;
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect_stdout: true
+}
+
+issue_2436_3: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            o = {
+                a: 3,
+                b: 4,
+            };
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            o = {
+                a: 3,
+                b: 4,
+            };
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect_stdout: true
+}
+
+issue_2436_4: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+            var o;
+        }(o));
+    }
+    expect: {
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }({
+            a: 1,
+            b: 2,
+        }));
+    }
+    expect_stdout: true
+}
+
+issue_2436_5: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(o) {
+            return {
+                x: o.a,
+                y: o.b,
+            };
+        }(o));
+    }
+    expect: {
+        console.log(function(o) {
+            return {
+                x: o.a,
+                y: o.b,
+            };
+        }({
+            a: 1,
+            b: 2,
+        }));
+    }
+    expect_stdout: true
+}
+
+issue_2436_6: {
+    options = {
+        collapse_vars: true,
+        evaluate: true,
+        inline: true,
+        passes: 2,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+        unsafe: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        console.log({
+            x: 1,
+            y: 2,
+        });
+    }
+    expect_stdout: true
+}
+
+issue_2436_7: {
+    options = {
+        collapse_vars: true,
+        hoist_props: true,
+        inline: true,
+        passes: 3,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        console.log({
+            x: 1,
+            y: 2,
+        });
+    }
+    expect_stdout: true
+}
+
+issue_2436_8: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect_stdout: true
+}
+
+issue_2436_9: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: "strict",
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = console;
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect: {
+        var o = console;
+        console.log(function(c) {
+            return {
+                x: c.a,
+                y: c.b,
+            };
+        }(o));
+    }
+    expect_stdout: true
+}
+
+issue_2436_10: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        pure_getters: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        function f(n) {
+            o = { b: 3 };
+            return n;
+        }
+        console.log(function(c) {
+            return [
+                c.a,
+                f(c.b),
+                c.b,
+            ];
+        }(o).join(" "));
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        function f(n) {
+            o = { b: 3 };
+            return n;
+        }
+        console.log(function(c) {
+            return [
+                c.a,
+                f(c.b),
+                c.b,
+            ];
+        }(o).join(" "));
+    }
+    expect_stdout: "1 2 2"
+}
+
+issue_2436_11: {
+    options = {
+        collapse_vars: true,
+        join_vars: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        function matrix() {}
+        function isCollection() {}
+        function _randomDataForMatrix() {}
+        function _randomInt() {}
+        function f(arg1, arg2) {
+            if (isCollection(arg1)) {
+                var size = arg1;
+                var max = arg2;
+                var min = 0;
+                var res = _randomDataForMatrix(size.valueOf(), min, max, _randomInt);
+                return size && true === size.isMatrix ? matrix(res) : res;
+            } else {
+                var min = arg1;
+                var max = arg2;
+                return _randomInt(min, max);
+            }
+        }
+    }
+    expect: {
+        function matrix() {}
+        function isCollection() {}
+        function _randomDataForMatrix() {}
+        function _randomInt() {}
+        function f(arg1, arg2) {
+            if (isCollection(arg1)) {
+                var size = arg1, max = arg2, min = 0, res = _randomDataForMatrix(size.valueOf(), min, max, _randomInt);
+                return size && true === size.isMatrix ? matrix(res) : res;
+            } else {
+                return _randomInt(min = arg1, max = arg2);
+            }
+        }
+    }
+}
+
+issue_2436_12: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        function isUndefined() {}
+        function f() {
+            var viewValue = this.$$lastCommittedViewValue;
+            var modelValue = viewValue;
+            return isUndefined(modelValue) ? modelValue : null;
+        }
+    }
+    expect: {
+        function isUndefined() {}
+        function f() {
+            var modelValue = this.$$lastCommittedViewValue;
+            return isUndefined(modelValue) ? modelValue : null;
+        }
+    }
+}
+
+issue_2436_13: {
+    options = {
+        collapse_vars: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = "PASS";
+        (function() {
+            function f(b) {
+                (function g(b) {
+                    var b = b && (b.null = "FAIL");
+                })(a);
+            }
+            f();
+        })();
+        console.log(a);
+    }
+    expect: {
+        var a = "PASS";
+        (function() {
+            (function(b) {
+                (function(b) {
+                    a && (a.null = "FAIL");
+                })();
+            })();
+        })();
+        console.log(a);
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2436_14: {
+    options = {
+        collapse_vars: true,
+        reduce_vars: true,
+        unused: true,
+    }
+    input: {
+        var a = "PASS";
+        var b = {};
+        (function() {
+            var c = a;
+            c && function(c, d) {
+                console.log(c, d);
+            }(b, c);
+        })();
+    }
+    expect: {
+        var a = "PASS";
+        var b = {};
+        (function() {
+            a && function(c, d) {
+                console.log(c, d);
+            }(b, a);
+        })();
+    }
+    expect_stdout: true
+}

test/compress/comparing.js

@@ -96,6 +96,7 @@ self_comparison_1: {
 self_comparison_2: {
     options = {
         comparisons: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
     }

test/compress/dead-code.js

@@ -292,6 +292,7 @@ global_timeout_and_interval_symbols: {
 issue_2233_2: {
     options = {
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unsafe: true,
@@ -323,6 +324,7 @@ issue_2233_2: {
 issue_2233_3: {
     options = {
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,

test/compress/drop-unused.js

@@ -673,6 +673,7 @@ issue_1539: {
 vardef_value: {
     options = {
         keep_fnames: false,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -734,6 +735,7 @@ assign_chain: {
 issue_1583: {
     options = {
         keep_fargs: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -1080,6 +1082,7 @@ var_catch_toplevel: {
     options = {
         conditionals: true,
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -1109,11 +1112,12 @@ var_catch_toplevel: {
     }
 }
 
-issue_2105: {
+issue_2105_1: {
     options = {
         collapse_vars: true,
         inline: true,
         passes: 3,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -1139,17 +1143,51 @@ issue_2105: {
         });
     }
     expect: {
-        (function() {
-            var quux = function() {
+        ({
+            prop: function() {
+                console.log;
                 console.log("PASS");
-            };
-            return {
-                prop: function() {
-                    console.log;
-                    quux();
+            }
+        }).prop();
+    }
+    expect_stdout: "PASS"
+}
+
+issue_2105_2: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        passes: 3,
+        properties: true,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        unsafe: 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 };
                 }
-            };
-        })().prop();
+                return bar;
+            } );
+        });
+    }
+    expect: {
+        console.log("PASS");
     }
     expect_stdout: "PASS"
 }

test/compress/evaluate.js

@@ -251,6 +251,7 @@ unsafe_constant: {
 unsafe_object: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -279,6 +280,7 @@ unsafe_object: {
 unsafe_object_nested: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -307,6 +309,7 @@ unsafe_object_nested: {
 unsafe_object_complex: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -335,6 +338,7 @@ unsafe_object_complex: {
 unsafe_object_repeated: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -363,6 +367,7 @@ unsafe_object_repeated: {
 unsafe_object_accessor: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unsafe: true,
     }
@@ -663,6 +668,7 @@ call_args: {
     options = {
         evaluate: true,
         inline: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
     }
@@ -686,6 +692,7 @@ call_args_drop_param: {
         evaluate: true,
         inline: true,
         keep_fargs: false,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -1016,6 +1023,7 @@ Infinity_NaN_undefined_LHS: {
 issue_1964_1: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unsafe_regexp: false,
         unused: true,
@@ -1045,6 +1053,7 @@ issue_1964_1: {
 issue_1964_2: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unsafe_regexp: true,
         unused: true,
@@ -1201,6 +1210,7 @@ issue_2231_2: {
 self_comparison_1: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unsafe: true,
@@ -1221,6 +1231,7 @@ self_comparison_2: {
         evaluate: true,
         hoist_props: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,

test/compress/functions.js

@@ -19,6 +19,7 @@ iifes_returning_constants_keep_fargs_true: {
         booleans      : true,
         if_return     : true,
         join_vars     : true,
+        reduce_funcs  : true,
         reduce_vars   : true,
         cascade       : true,
         inline        : true,
@@ -55,6 +56,7 @@ iifes_returning_constants_keep_fargs_false: {
         booleans      : true,
         if_return     : true,
         join_vars     : true,
+        reduce_funcs  : true,
         reduce_vars   : true,
         cascade       : true,
         inline        : true,
@@ -101,6 +103,7 @@ issue_1841_1: {
     options = {
         keep_fargs: false,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -127,6 +130,7 @@ issue_1841_2: {
     options = {
         keep_fargs: false,
         pure_getters: false,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -154,6 +158,7 @@ function_returning_constant_literal: {
         inline: true,
         passes: 2,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -305,6 +310,7 @@ issue_2084: {
         evaluate: true,
         inline: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
@@ -340,6 +346,7 @@ issue_2084: {
 issue_2097: {
     options = {
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -508,3 +515,42 @@ issue_2114_2: {
     }
     expect_stdout: "2"
 }
+
+issue_2428: {
+    options = {
+        collapse_vars: true,
+        inline: true,
+        passes: 3,
+        pure_getters: "strict",
+        reduce_funcs: true,
+        reduce_vars: true,
+        side_effects: true,
+        toplevel: true,
+        unsafe: true,
+        unused: true,
+    }
+    input: {
+        function bar(k) {
+            console.log(k);
+        }
+        function foo(x) {
+            return bar(x);
+        }
+        function baz(a) {
+            foo(a);
+        }
+        baz(42);
+        baz("PASS");
+    }
+    expect: {
+        function baz(a) {
+            console.log(a);
+        }
+        baz(42);
+        baz("PASS");
+    }
+    expect_stdout: [
+        "42",
+        "PASS",
+    ]
+}

test/compress/hoist_props.js

@@ -3,6 +3,7 @@ issue_2377_1: {
         evaluate: true,
         inline: true,
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -35,6 +36,7 @@ issue_2377_2: {
         inline: true,
         hoist_props: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -66,6 +68,7 @@ issue_2377_3: {
         inline: true,
         hoist_props: true,
         passes: 3,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -92,6 +95,7 @@ issue_2377_3: {
 direct_access_1: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -120,6 +124,7 @@ direct_access_1: {
 direct_access_2: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -143,6 +148,7 @@ direct_access_2: {
 direct_access_3: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -163,6 +169,7 @@ direct_access_3: {
 single_use: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -187,6 +194,7 @@ single_use: {
 name_collision_1: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
     }
@@ -224,6 +232,7 @@ name_collision_1: {
 name_collision_2: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
     }
@@ -257,6 +266,7 @@ name_collision_2: {
 name_collision_3: {
     options = {
         hoist_props: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
     }
@@ -293,6 +303,7 @@ contains_this_1: {
         hoist_props: true,
         inline: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -318,6 +329,7 @@ contains_this_2: {
         hoist_props: true,
         inline: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -345,6 +357,7 @@ contains_this_3: {
         hoist_props: true,
         inline: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -369,3 +382,121 @@ contains_this_3: {
     }
     expect_stdout: "1 1 true"
 }
+
+new_this: {
+    options = {
+        evaluate: true,
+        hoist_props: true,
+        inline: true,
+        passes: 2,
+        reduce_funcs: true,
+        reduce_vars: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+            f: function(a) {
+                this.b = a;
+            }
+        };
+        console.log(new o.f(o.a).b, o.b);
+    }
+    expect: {
+        console.log(new function(a) {
+            this.b = a;
+        }(1).b, 2);
+    }
+    expect_stdout: "1 2"
+}
+
+issue_2473_1: {
+    options = {
+        hoist_props: false,
+        reduce_vars: true,
+        top_retain: [ "x", "y" ],
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var x = {};
+        var y = [];
+        var z = {};
+    }
+    expect: {
+        var x = {};
+        var y = [];
+    }
+}
+
+issue_2473_2: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        top_retain: [ "x", "y" ],
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var x = {};
+        var y = [];
+        var z = {};
+    }
+    expect: {
+        var x = {};
+        var y = [];
+    }
+}
+
+issue_2473_3: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        top_retain: "o",
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(o.a, o.b);
+    }
+    expect: {
+        var o = {
+            a: 1,
+            b: 2,
+        };
+        console.log(o.a, o.b);
+    }
+    expect_stdout: "1 2"
+}
+
+issue_2473_4: {
+    options = {
+        hoist_props: true,
+        reduce_vars: true,
+        top_retain: "o",
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        (function() {
+            var o = {
+                a: 1,
+                b: 2,
+            };
+            console.log(o.a, o.b);
+        })();
+    }
+    expect: {
+        (function() {
+            var o_a = 1, o_b = 2;
+            console.log(o_a, o_b);
+        })();
+    }
+    expect_stdout: "1 2"
+}

test/compress/issue-1041.js

@@ -1,6 +1,7 @@
 const_pragma: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
     };
 
@@ -16,6 +17,7 @@ const_pragma: {
 not_const: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
     };
 

test/compress/issue-1609.js

@@ -2,6 +2,7 @@ chained_evaluation_1: {
     options = {
         collapse_vars: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -28,6 +29,7 @@ chained_evaluation_2: {
     options = {
         collapse_vars: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }

test/compress/issue-1656.js

@@ -15,6 +15,7 @@ f7: {
         negate_iife: true,
         passes: 3,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,

test/compress/issue-1673.js

@@ -1,5 +1,6 @@
 side_effects_catch: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -34,6 +35,7 @@ side_effects_catch: {
 
 side_effects_else: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -62,6 +64,7 @@ side_effects_else: {
 
 side_effects_finally: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -98,6 +101,7 @@ side_effects_finally: {
 
 side_effects_label: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -130,6 +134,7 @@ side_effects_label: {
 
 side_effects_switch: {
     options = {
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,

test/compress/issue-1787.js

@@ -2,6 +2,7 @@ unary_prefix: {
     options = {
         evaluate: true,
         inline: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }

test/compress/issue-1833.js

@@ -1,6 +1,7 @@
 iife_for: {
     options = {
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -26,6 +27,7 @@ iife_for: {
 iife_for_in: {
     options = {
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -51,6 +53,7 @@ iife_for_in: {
 iife_do: {
     options = {
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -80,6 +83,7 @@ iife_do: {
 iife_while: {
     options = {
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,

test/compress/issue-281.js

@@ -3,6 +3,7 @@ collapse_vars_constants: {
         collapse_vars: true,
         evaluate: true,
         inline: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -240,6 +241,7 @@ negate_iife_issue_1073: {
         evaluate: true,
         inline: true,
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         unused: true,
@@ -267,6 +269,7 @@ issue_1288_side_effects: {
         evaluate: true,
         inline: true,
         negate_iife: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -299,6 +302,7 @@ inner_var_for_in_1: {
     options = {
         evaluate: true,
         inline: true,
+        reduce_funcs: true,
         reduce_vars: true,
     }
     input: {
@@ -330,6 +334,7 @@ issue_1595_3: {
         evaluate: true,
         inline: true,
         passes: 2,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }

test/compress/issue-973.js

@@ -51,6 +51,7 @@ this_binding_collapse_vars: {
     options = {
         collapse_vars: true,
         toplevel: true,
+        unused: true,
     };
     input: {
         var c = a; c();

test/compress/properties.js

@@ -833,6 +833,7 @@ lhs_prop_2: {
         evaluate: true,
         inline: true,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         unused: true,
@@ -879,6 +880,7 @@ prop_side_effects_1: {
         evaluate: true,
         inline: true,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -915,6 +917,7 @@ prop_side_effects_2: {
         inline: true,
         passes: 2,
         properties: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -1006,3 +1009,22 @@ array_hole: {
     }
     expect_stdout: "2 undefined 3"
 }
+
+new_this: {
+    options = {
+        properties: true,
+        side_effects: true,
+    }
+    input: {
+        new {
+            f: function(a) {
+                this.a = a;
+            }
+        }.f(42);
+    }
+    expect: {
+        new function(a) {
+            this.a = a;
+        }(42);
+    }
+}

test/compress/pure_getters.js

@@ -1,6 +1,7 @@
 strict: {
     options = {
         pure_getters: "strict",
+        reduce_funcs: false,
         reduce_vars: false,
         side_effects: true,
         toplevel: true,
@@ -30,6 +31,7 @@ strict: {
 strict_reduce_vars: {
     options = {
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -58,6 +60,7 @@ strict_reduce_vars: {
 unsafe: {
     options = {
         pure_getters: true,
+        reduce_funcs: false,
         reduce_vars: false,
         side_effects: true,
         toplevel: true,
@@ -84,6 +87,7 @@ unsafe: {
 unsafe_reduce_vars: {
     options = {
         pure_getters: true,
+        reduce_funcs: true,
         reduce_vars: true,
         side_effects: true,
         toplevel: true,
@@ -185,6 +189,7 @@ issue_2110_1: {
         pure_getters: "strict",
         sequences: true,
         side_effects: true,
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -215,6 +220,7 @@ issue_2110_2: {
     options = {
         collapse_vars: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -247,6 +253,7 @@ set_immutable_1: {
         collapse_vars: true,
         evaluate: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -270,6 +277,7 @@ set_immutable_2: {
         cascade: true,
         conditionals: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
@@ -293,6 +301,7 @@ set_immutable_3: {
         collapse_vars: true,
         evaluate: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         toplevel: true,
         unused: true,
@@ -318,6 +327,7 @@ set_immutable_4: {
         cascade: true,
         conditionals: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,
@@ -343,6 +353,7 @@ set_mutable_1: {
         collapse_vars: true,
         evaluate: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         unused: true,
     }
@@ -367,6 +378,7 @@ set_mutable_2: {
         cascade: true,
         conditionals: true,
         pure_getters: "strict",
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,

test/compress/screw-ie8.js

@@ -187,6 +187,7 @@ dont_screw_try_catch_undefined: {
 reduce_vars: {
     options = {
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         ie8: true,
         unused: true,

test/compress/switch.js

@@ -714,6 +714,7 @@ issue_1705_2: {
     options = {
         dead_code: true,
         evaluate: true,
+        reduce_funcs: true,
         reduce_vars: true,
         sequences: true,
         side_effects: true,

test/mocha/minify.js

@@ -297,4 +297,36 @@ describe("minify", function() {
             assert.strictEqual(result.code, "alert({bar:42});");
         });
     });
+
+    describe("collapse_vars", function() {
+        it("Should not produce invalid AST", function() {
+            var code = [
+                "function f(a) {",
+                "    a = x();",
+                "    return a;",
+                "}",
+                "f();",
+            ].join("\n");
+            var ast = Uglify.minify(code, {
+                compress: false,
+                mangle: false,
+                output: {
+                    ast: true
+                },
+            }).ast;
+            assert.strictEqual(ast.TYPE, "Toplevel");
+            assert.strictEqual(ast.body.length, 2);
+            assert.strictEqual(ast.body[0].TYPE, "Defun");
+            assert.strictEqual(ast.body[0].body.length, 2);
+            assert.strictEqual(ast.body[0].body[0].TYPE, "SimpleStatement");
+            var stat = ast.body[0].body[0];
+            Uglify.minify(ast, {
+                compress: {
+                    sequences: false
+                }
+            });
+            assert.ok(stat.body);
+            assert.strictEqual(stat.print_to_string(), "a=x()");
+        });
+    });
 });

test/ufuzz.js

@@ -162,6 +162,7 @@ var VALUES = [
     '"object"',
     '"number"',
     '"function"',
+    'this',
 ];
 
 var BINARY_OPS_NO_COMMA = [
@@ -349,10 +350,10 @@ function createParams() {
     return params.join(', ');
 }
 
-function createArgs() {
+function createArgs(recurmax, stmtDepth, canThrow) {
     var args = [];
     for (var n = rng(4); --n >= 0;) {
-        args.push(createValue());
+        args.push(rng(2) ? createValue() : createExpression(recurmax - 1, COMMA_OK, stmtDepth, canThrow));
     }
     return args.join(', ');
 }
@@ -390,9 +391,10 @@ function createFunction(recurmax, inGlobal, noDecl, canThrow, stmtDepth) {
 
     VAR_NAMES.length = namesLenBefore;
 
-    if (noDecl) s = 'var ' + createVarName(MANDATORY) + ' = ' + s + '(' + createExpression(recurmax, COMMA_OK, stmtDepth, canThrow) + ');';
+    if (noDecl) s = 'var ' + createVarName(MANDATORY) + ' = ' + s;
     // avoid "function statements" (decl inside statements)
-    else if (inGlobal || rng(10) > 0) s += 'var ' + createVarName(MANDATORY) + ' = ' + name + '(' + createArgs() + ');';
+    else if (inGlobal || rng(10) > 0) s += 'var ' + createVarName(MANDATORY) + ' = ' + name;
+    s += '(' + createArgs(recurmax, stmtDepth, canThrow) + ');';
 
     return s;
 }
@@ -626,6 +628,9 @@ function _createExpression(recurmax, noComma, stmtDepth, canThrow) {
       case p++:
       case p++:
         return createValue();
+      case p++:
+      case p++:
+        return getVarName();
       case p++:
         return createExpression(recurmax, COMMA_OK, stmtDepth, canThrow);
       case p++: