v3.0.26

fixes #2242

README.md

@@ -721,7 +721,7 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
   compressor from discarding function names.  Useful for code relying on
   `Function.prototype.name`. See also: the `keep_fnames` [mangle option](#mangle).
 
-- `passes` -- default `1`. Number of times to run compress with a maximum of 3.
+- `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.
 
@@ -1032,8 +1032,8 @@ in total it's a bit more than just using UglifyJS's own parser.
 
 ### Uglify Fast Minify Mode
 
-It's not well known, but variable and function name mangling accounts for
-95% of the size reduction in minified code for most javascript - not
+It's not well known, but whitespace removal and symbol mangling accounts
+for 95% of the size reduction in minified code for most javascript - not
 elaborate code transforms. One can simply disable `compress` to speed up
 Uglify builds by 3 to 4 times. In this fast `mangle`-only mode Uglify has
 comparable minify speeds and gzip sizes to
@@ -1042,10 +1042,11 @@ comparable minify speeds and gzip sizes to
 | d3.js | minify size | gzip size | minify time (seconds) |
 | --- | ---: | ---: | ---: |
 | original | 451,131 | 108,733 | - |
-| uglify-js@3.0.23 mangle=false, compress=false | 316,600 | 85,245 | 0.73 |
-| uglify-js@3.0.23 mangle=true, compress=false | 220,216 | 72,730 | 1.21 |
-| Butternut 0.4.6 | 217,568 | 72,738 | 1.81 |
-| uglify-js@3.0.23 mangle=true, compress=true | 212,511 | 71,560 | 4.64 |
+| uglify-js@3.0.24 mangle=false, compress=false | 316,600 | 85,245 | 0.70 |
+| uglify-js@3.0.24 mangle=true, compress=false | 220,216 | 72,730 | 1.13 |
+| butternut@0.4.6 | 217,568 | 72,738 | 1.41 |
+| uglify-js@3.0.24 mangle=true, compress=true | 212,511 | 71,560 | 3.36 |
+| babili@0.1.4 | 210,713 | 72,140 | 12.64 |
 
 To enable fast minify mode from the CLI use:
 ```

bin/uglifyjs

@@ -35,11 +35,11 @@ else if (process.argv.indexOf("options") >= 0) program.helpInformation = functio
     }
     return text.join("\n");
 };
-program.option("-p, --parse <options>", "Specify parser options.", parse_js("parse", true));
-program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js("compress", true));
-program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js("mangle", true));
-program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js("mangle-props", true));
-program.option("-b, --beautify [options]", "Beautify output/specify output options.", parse_js("beautify", true));
+program.option("-p, --parse <options>", "Specify parser options.", parse_js());
+program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js());
+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 <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.");
@@ -310,7 +310,7 @@ function read_file(path, default_value) {
     }
 }
 
-function parse_js(flag, constants) {
+function parse_js(flag) {
     return function(value, options) {
         options = options || {};
         try {
@@ -328,7 +328,7 @@ function parse_js(flag, constants) {
                 if (node instanceof UglifyJS.AST_Assign) {
                     var name = node.left.print_to_string();
                     var value = node.right;
-                    if (!constants) {
+                    if (flag) {
                         options[name] = value;
                     } else if (value instanceof UglifyJS.AST_Array) {
                         options[name] = value.elements.map(to_string);
@@ -351,14 +351,18 @@ function parse_js(flag, constants) {
                 }
             }));
         } catch(ex) {
-            options[value] = null;
+            if (flag) {
+                fatal("Error parsing arguments for '" + flag + "': " + value);
+            } else {
+                options[value] = null;
+            }
         }
         return options;
     }
 }
 
 function parse_source_map() {
-    var parse = parse_js("sourceMap", true);
+    var parse = parse_js();
     return function(value, options) {
         var hasContent = options && "content" in options;
         var settings = parse(value, options);

lib/compress.js

@@ -148,10 +148,20 @@ merge(Compressor.prototype, {
             node.process_expression(true);
         }
         var passes = +this.options.passes || 1;
-        for (var pass = 0; pass < passes && pass < 3; ++pass) {
+        var last_count = 1 / 0;
+        for (var pass = 0; pass < passes; pass++) {
             if (pass > 0 || this.option("reduce_vars"))
                 node.reset_opt_flags(this, true);
             node = node.transform(this);
+            if (passes > 1) {
+                var count = 0;
+                node.walk(new TreeWalker(function() {
+                    count++;
+                }));
+                this.info("pass " + pass + ": last_count: " + last_count + ", count: " + count);
+                if (count >= last_count) break;
+                last_count = count;
+            }
         }
         if (this.option("expression")) {
             node.process_expression(false);
@@ -679,6 +689,16 @@ merge(Compressor.prototype, {
         return false;
     }
 
+    function is_undeclared_ref(node) {
+        return node instanceof AST_SymbolRef && node.definition().undeclared;
+    }
+
+    var global_names = makePredicate("Array Boolean console Error Function Math Number RegExp Object String");
+    AST_SymbolRef.DEFMETHOD("is_declared", function(compressor) {
+        return !this.definition().undeclared
+            || compressor.option("unsafe") && global_names(this.name);
+    });
+
     function tighten_body(statements, compressor) {
         var CHANGED, max_iter = 10;
         do {
@@ -748,7 +768,7 @@ merge(Compressor.prototype, {
                             || node instanceof AST_Call && lhs instanceof AST_PropAccess && lhs.equivalent_to(node.expression)
                             || node instanceof AST_Debugger
                             || node instanceof AST_IterationStatement && !(node instanceof AST_For)
-                            || node instanceof AST_SymbolRef && node.undeclared()
+                            || node instanceof AST_SymbolRef && !node.is_declared(compressor)
                             || node instanceof AST_Try
                             || node instanceof AST_With
                             || parent instanceof AST_For && node !== parent.init) {
@@ -780,6 +800,7 @@ merge(Compressor.prototype, {
                                     right: candidate.value
                                 });
                             }
+                            candidate.write_only = false;
                             return candidate;
                         }
                         // These node types have child nodes that execute sequentially,
@@ -1309,12 +1330,12 @@ merge(Compressor.prototype, {
     // returns true if this node may be null, undefined or contain `AST_Accessor`
     (function(def) {
         AST_Node.DEFMETHOD("may_throw_on_access", function(compressor) {
-            var pure_getters = compressor.option("pure_getters");
-            return !pure_getters || this._throw_on_access(pure_getters);
+            return !compressor.option("pure_getters")
+                || this._dot_throw(compressor);
         });
 
-        function is_strict(pure_getters) {
-            return /strict/.test(pure_getters);
+        function is_strict(compressor) {
+            return /strict/.test(compressor.option("pure_getters"));
         }
 
         def(AST_Node, is_strict);
@@ -1322,8 +1343,8 @@ merge(Compressor.prototype, {
         def(AST_Undefined, return_true);
         def(AST_Constant, return_false);
         def(AST_Array, return_false);
-        def(AST_Object, function(pure_getters) {
-            if (!is_strict(pure_getters)) return false;
+        def(AST_Object, function(compressor) {
+            if (!is_strict(compressor)) return false;
             for (var i = this.properties.length; --i >=0;)
                 if (this.properties[i].value instanceof AST_Accessor) return true;
             return false;
@@ -1333,37 +1354,38 @@ merge(Compressor.prototype, {
         def(AST_UnaryPrefix, function() {
             return this.operator == "void";
         });
-        def(AST_Binary, function(pure_getters) {
+        def(AST_Binary, function(compressor) {
             switch (this.operator) {
               case "&&":
-                return this.left._throw_on_access(pure_getters);
+                return this.left._dot_throw(compressor);
               case "||":
-                return this.left._throw_on_access(pure_getters)
-                    && this.right._throw_on_access(pure_getters);
+                return this.left._dot_throw(compressor)
+                    && this.right._dot_throw(compressor);
               default:
                 return false;
             }
         })
-        def(AST_Assign, function(pure_getters) {
+        def(AST_Assign, function(compressor) {
             return this.operator == "="
-                && this.right._throw_on_access(pure_getters);
+                && this.right._dot_throw(compressor);
         })
-        def(AST_Conditional, function(pure_getters) {
-            return this.consequent._throw_on_access(pure_getters)
-                || this.alternative._throw_on_access(pure_getters);
+        def(AST_Conditional, function(compressor) {
+            return this.consequent._dot_throw(compressor)
+                || this.alternative._dot_throw(compressor);
         })
-        def(AST_Sequence, function(pure_getters) {
-            return this.expressions[this.expressions.length - 1]._throw_on_access(pure_getters);
+        def(AST_Sequence, function(compressor) {
+            return this.expressions[this.expressions.length - 1]._dot_throw(compressor);
         });
-        def(AST_SymbolRef, function(pure_getters) {
+        def(AST_SymbolRef, function(compressor) {
             if (this.is_undefined) return true;
-            if (!is_strict(pure_getters)) return false;
+            if (!is_strict(compressor)) return false;
+            if (is_undeclared_ref(this) && this.is_declared(compressor)) return false;
             if (this.is_immutable()) return false;
             var fixed = this.fixed_value();
-            return !fixed || fixed._throw_on_access(pure_getters);
+            return !fixed || fixed._dot_throw(compressor);
         });
     })(function(node, func) {
-        node.DEFMETHOD("_throw_on_access", func);
+        node.DEFMETHOD("_dot_throw", func);
     });
 
     /* -----[ boolean/negation helpers ]----- */
@@ -1724,11 +1746,8 @@ merge(Compressor.prototype, {
         });
         var global_objs = {
             Array: Array,
-            Boolean: Boolean,
             Math: Math,
             Number: Number,
-            RegExp: RegExp,
-            Object: Object,
             String: String,
         };
         function convert_to_predicate(obj) {
@@ -1765,7 +1784,7 @@ merge(Compressor.prototype, {
                 }
                 var exp = this.expression;
                 var val;
-                if (exp instanceof AST_SymbolRef && exp.undeclared()) {
+                if (is_undeclared_ref(exp)) {
                     if (!(static_values[exp.name] || return_false)(key)) return this;
                     val = global_objs[exp.name];
                 } else {
@@ -1842,10 +1861,6 @@ merge(Compressor.prototype, {
                 "isFinite",
                 "isNaN",
             ],
-            Object: [
-                "keys",
-                "getOwnPropertyNames",
-            ],
             String: [
                 "fromCharCode",
             ],
@@ -1861,7 +1876,7 @@ merge(Compressor.prototype, {
                 }
                 var val;
                 var e = exp.expression;
-                if (e instanceof AST_SymbolRef && e.undeclared()) {
+                if (is_undeclared_ref(e)) {
                     if (!(static_fns[e.name] || return_false)(key)) return this;
                     val = global_objs[e.name];
                 } else {
@@ -2043,7 +2058,7 @@ merge(Compressor.prototype, {
                 || this.expression.has_side_effects(compressor);
         });
         def(AST_SymbolRef, function(compressor){
-            return this.undeclared();
+            return !this.is_declared(compressor);
         });
         def(AST_SymbolDeclaration, return_false);
         def(AST_Object, function(compressor){
@@ -2167,7 +2182,12 @@ merge(Compressor.prototype, {
         var drop_funcs = !(self instanceof AST_Toplevel) || compressor.toplevel.funcs;
         var drop_vars = !(self instanceof AST_Toplevel) || compressor.toplevel.vars;
         if (!drop_funcs && !drop_vars) return;
-        var assign_as_unused = !/keep_assign/.test(compressor.option("unused"));
+        var assign_as_unused = /keep_assign/.test(compressor.option("unused")) ? return_false : function(node) {
+            if (node instanceof AST_Assign && (node.write_only || node.operator == "=")) {
+                return node.left;
+            }
+            if (node instanceof AST_Unary && node.write_only) return node.expression;
+        };
         var in_use = [];
         var in_use_ids = Object.create(null); // avoid expensive linear scans of in_use
         if (self instanceof AST_Toplevel && compressor.top_retain) {
@@ -2217,12 +2237,8 @@ merge(Compressor.prototype, {
                     });
                     return true;
                 }
-                if (assign_as_unused
-                    && node instanceof AST_Assign
-                    && node.operator == "="
-                    && node.left instanceof AST_SymbolRef
-                    && scope === self) {
-                    node.right.walk(tw);
+                if (assign_as_unused(node) instanceof AST_SymbolRef && scope === self) {
+                    if (node instanceof AST_Assign) node.right.walk(tw);
                     return true;
                 }
                 if (node instanceof AST_SymbolRef) {
@@ -2386,14 +2402,17 @@ merge(Compressor.prototype, {
                         });
                     }
                 }
-                if (drop_vars && assign_as_unused
-                    && node instanceof AST_Assign
-                    && node.operator == "="
-                    && node.left instanceof AST_SymbolRef) {
-                    var def = node.left.definition();
-                    if (!(def.id in in_use_ids)
+                if (drop_vars) {
+                    var def = assign_as_unused(node);
+                    if (def instanceof AST_SymbolRef
+                        && !((def = def.definition()).id in in_use_ids)
                         && self.variables.get(def.name) === def) {
-                        return maintain_this_binding(tt.parent(), node, node.right.transform(tt));
+                        if (node instanceof AST_Assign) {
+                            return maintain_this_binding(tt.parent(), node, node.right.transform(tt));
+                        }
+                        return make_node(AST_Number, node, {
+                            value: 0
+                        });
                     }
                 }
                 // certain combination of unused name + side effect leads to:
@@ -2632,7 +2651,10 @@ merge(Compressor.prototype, {
                 return make_sequence(this, [ left, right ]);
             }
         });
-        def(AST_Assign, return_this);
+        def(AST_Assign, function(compressor){
+            this.write_only = !this.left.has_side_effects(compressor);
+            return this;
+        });
         def(AST_Conditional, function(compressor){
             var consequent = this.consequent.drop_side_effect_free(compressor);
             var alternative = this.alternative.drop_side_effect_free(compressor);
@@ -2653,7 +2675,10 @@ merge(Compressor.prototype, {
             return node;
         });
         def(AST_Unary, function(compressor, first_in_statement){
-            if (unary_side_effects(this.operator)) return this;
+            if (unary_side_effects(this.operator)) {
+                this.write_only = !this.expression.has_side_effects(compressor);
+                return this;
+            }
             if (this.operator == "typeof" && this.expression instanceof AST_SymbolRef) return null;
             var expression = this.expression.drop_side_effect_free(compressor, first_in_statement);
             if (first_in_statement
@@ -2667,8 +2692,8 @@ merge(Compressor.prototype, {
             }
             return expression;
         });
-        def(AST_SymbolRef, function() {
-            return this.undeclared() ? this : null;
+        def(AST_SymbolRef, function(compressor) {
+            return this.is_declared(compressor) ? null : this;
         });
         def(AST_Object, function(compressor, first_in_statement){
             var values = trim(this.properties, compressor, first_in_statement);
@@ -3130,7 +3155,7 @@ merge(Compressor.prototype, {
             self.args.length = last;
         }
         if (compressor.option("unsafe")) {
-            if (exp instanceof AST_SymbolRef && exp.undeclared()) {
+            if (is_undeclared_ref(exp)) {
                 switch (exp.name) {
                   case "Array":
                     if (self.args.length != 1) {
@@ -3257,8 +3282,7 @@ merge(Compressor.prototype, {
             }
         }
         if (compressor.option("unsafe_Func")
-            && exp instanceof AST_SymbolRef
-            && exp.undeclared()
+            && is_undeclared_ref(exp)
             && exp.name == "Function") {
             // new Function() => function(){}
             if (self.args.length == 0) return make_node(AST_Function, self, {
@@ -3375,9 +3399,7 @@ merge(Compressor.prototype, {
                 while (name.expression) {
                     name = name.expression;
                 }
-                if (name instanceof AST_SymbolRef
-                    && name.name == "console"
-                    && name.undeclared()) {
+                if (is_undeclared_ref(name) && name.name == "console") {
                     return make_node(AST_Undefined, self).optimize(compressor);
                 }
             }
@@ -3398,7 +3420,7 @@ merge(Compressor.prototype, {
     OPT(AST_New, function(self, compressor){
         if (compressor.option("unsafe")) {
             var exp = self.expression;
-            if (exp instanceof AST_SymbolRef && exp.undeclared()) {
+            if (is_undeclared_ref(exp)) {
                 switch (exp.name) {
                   case "Object":
                   case "RegExp":
@@ -3475,6 +3497,8 @@ merge(Compressor.prototype, {
                                 operator: car.operator,
                                 expression: left
                             });
+                        } else {
+                            car.write_only = false;
                         }
                         if (parent) {
                             parent[field] = car;
@@ -3690,7 +3714,7 @@ merge(Compressor.prototype, {
                 && self.right instanceof AST_UnaryPrefix
                 && self.right.operator == "typeof") {
                 var expr = self.right.expression;
-                if (expr instanceof AST_SymbolRef ? !expr.undeclared()
+                if (expr instanceof AST_SymbolRef ? expr.is_declared(compressor)
                     : !(expr instanceof AST_PropAccess && compressor.option("ie8"))) {
                     self.right = expr;
                     self.left = make_node(AST_Undefined, self.left).optimize(compressor);
@@ -4016,7 +4040,7 @@ merge(Compressor.prototype, {
         }
         // testing against !self.scope.uses_with first is an optimization
         if (!compressor.option("ie8")
-            && self.undeclared()
+            && is_undeclared_ref(self)
             && (!self.scope.uses_with || !compressor.find_parent(AST_With))) {
             switch (self.name) {
               case "undefined":
@@ -4371,7 +4395,7 @@ merge(Compressor.prototype, {
         var prop = self.property;
         if (prop instanceof AST_String && compressor.option("properties")) {
             prop = prop.getValue();
-            if (RESERVED_WORDS(prop) ? !compressor.option("ie8") : is_identifier_string(prop)) {
+            if (is_identifier_string(prop)) {
                 return make_node(AST_Dot, self, {
                     expression : self.expression,
                     property   : prop
@@ -4408,19 +4432,10 @@ merge(Compressor.prototype, {
         if (def) {
             return def.optimize(compressor);
         }
-        var prop = self.property;
-        if (RESERVED_WORDS(prop) && compressor.option("ie8")) {
-            return make_node(AST_Sub, self, {
-                expression : self.expression,
-                property   : make_node(AST_String, self, {
-                    value: prop
-                })
-            }).optimize(compressor);
-        }
         if (compressor.option("unsafe") && self.expression instanceof AST_Object) {
             var values = self.expression.properties;
             for (var i = values.length; --i >= 0;) {
-                if (values[i].key === prop) {
+                if (values[i].key === self.property) {
                     var value = values[i].value;
                     if (value instanceof AST_Function ? !value.contains_this() : !value.has_side_effects(compressor)) {
                         var obj = self.expression.clone();
@@ -4435,7 +4450,7 @@ merge(Compressor.prototype, {
             && self.expression instanceof AST_Dot
             && self.expression.property == "prototype") {
             var exp = self.expression.expression;
-            if (exp instanceof AST_SymbolRef && exp.undeclared()) switch (exp.name) {
+            if (is_undeclared_ref(exp)) switch (exp.name) {
               case "Array":
                 self.expression = make_node(AST_Array, self.expression, {
                     elements: []

lib/output.js

@@ -109,7 +109,7 @@ function OutputStream(options) {
     var current_pos = 0;
     var OUTPUT = "";
 
-    function to_ascii(str, identifier) {
+    var to_utf8 = options.ascii_only ? function(str, identifier) {
         return str.replace(/[\u0000-\u001f\u007f-\uffff]/g, function(ch) {
             var code = ch.charCodeAt(0).toString(16);
             if (code.length <= 2 && !identifier) {
@@ -120,6 +120,12 @@ function OutputStream(options) {
                 return "\\u" + code;
             }
         });
+    } : function(str) {
+        return str.replace(/[\ud800-\udbff](?![\udc00-\udfff])/g, function(ch) {
+            return "\\u" + ch.charCodeAt(0).toString(16);
+        }).replace(/(^|[^\ud800-\udbff])([\udc00-\udfff])/g, function(match, prefix, ch) {
+            return prefix + "\\u" + ch.charCodeAt(0).toString(16);
+        });
     };
 
     function make_string(str, quote) {
@@ -150,7 +156,7 @@ function OutputStream(options) {
         function quote_double() {
             return '"' + str.replace(/\x22/g, '\\"') + '"';
         }
-        if (options.ascii_only) str = to_ascii(str);
+        str = to_utf8(str);
         switch (options.quote_style) {
           case 1:
             return quote_single();
@@ -175,8 +181,7 @@ function OutputStream(options) {
 
     function make_name(name) {
         name = name.toString();
-        if (options.ascii_only)
-            name = to_ascii(name, true);
+        name = to_utf8(name, true);
         return name;
     };
 
@@ -433,7 +438,7 @@ function OutputStream(options) {
         last            : function() { return last },
         semicolon       : semicolon,
         force_semicolon : force_semicolon,
-        to_ascii        : to_ascii,
+        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);
@@ -1104,6 +1109,9 @@ function OutputStream(options) {
         self.expression.print(output);
         if (self instanceof AST_New && !need_constructor_parens(self, output))
             return;
+        if (self.expression instanceof AST_Lambda) {
+            output.add_mapping(self.start);
+        }
         output.with_parens(function(){
             self.args.forEach(function(expr, i){
                 if (i) output.comma();
@@ -1143,15 +1151,23 @@ function OutputStream(options) {
     DEFPRINT(AST_Dot, function(self, output){
         var expr = self.expression;
         expr.print(output);
-        if (expr instanceof AST_Number && expr.getValue() >= 0) {
-            if (!/[xa-f.)]/i.test(output.last())) {
-                output.print(".");
+        var prop = self.property;
+        if (output.option("ie8") && RESERVED_WORDS(prop)) {
+            output.print("[");
+            output.add_mapping(self.end);
+            output.print_string(prop);
+            output.print("]");
+        } else {
+            if (expr instanceof AST_Number && expr.getValue() >= 0) {
+                if (!/[xa-f.)]/i.test(output.last())) {
+                    output.print(".");
+                }
             }
+            output.print(".");
+            // the name after dot would be mapped about here.
+            output.add_mapping(self.end);
+            output.print_name(prop);
         }
-        output.print(".");
-        // the name after dot would be mapped about here.
-        output.add_mapping(self.end);
-        output.print_name(self.property);
     });
     DEFPRINT(AST_Sub, function(self, output){
         self.expression.print(output);
@@ -1307,9 +1323,7 @@ function OutputStream(options) {
         if (regexp.raw_source) {
             str = "/" + regexp.raw_source + str.slice(str.lastIndexOf("/"));
         }
-        if (output.option("ascii_only")) {
-            str = output.to_ascii(str);
-        }
+        str = output.to_utf8(str);
         output.print(str);
         var p = output.parent();
         if (p instanceof AST_Binary && /^in/.test(p.operator) && p.left === self)

lib/propmangle.js

@@ -76,7 +76,7 @@ function mangle_properties(ast, options) {
         only_cache: false,
         regex: null,
         reserved: null,
-    });
+    }, true);
 
     var reserved = options.reserved;
     if (!Array.isArray(reserved)) reserved = [];

lib/scope.js

@@ -373,14 +373,6 @@ AST_Symbol.DEFMETHOD("unreferenced", function(){
         && !(this.scope.uses_eval || this.scope.uses_with);
 });
 
-AST_Symbol.DEFMETHOD("undeclared", function(){
-    return this.definition().undeclared;
-});
-
-AST_LabelRef.DEFMETHOD("undeclared", return_false);
-
-AST_Label.DEFMETHOD("undeclared", return_false);
-
 AST_Symbol.DEFMETHOD("definition", function(){
     return this.thedef;
 });

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": "3.0.24",
+  "version": "3.0.26",
   "engines": {
     "node": ">=0.8.0"
   },
@@ -29,12 +29,12 @@
     "LICENSE"
   ],
   "dependencies": {
-    "commander": "~2.9.0",
+    "commander": "~2.11.0",
     "source-map": "~0.5.1"
   },
   "devDependencies": {
-    "acorn": "~5.0.3",
-    "mocha": "~2.3.4",
+    "acorn": "~5.1.1",
+    "mocha": "~3.4.2",
     "semver": "~5.3.0"
   },
   "scripts": {

test/benchmark.js

@@ -6,6 +6,7 @@
 var createHash = require("crypto").createHash;
 var fetch = require("./fetch");
 var fork = require("child_process").fork;
+var zlib = require("zlib");
 var args = process.argv.slice(2);
 if (!args.length) {
     args.push("-mc");
@@ -33,6 +34,7 @@ function done() {
             console.log(info.log);
             console.log("Original:", info.input, "bytes");
             console.log("Uglified:", info.output, "bytes");
+            console.log("GZipped: ", info.gzip, "bytes");
             console.log("SHA1 sum:", info.sha1);
             if (info.code) {
                 failures.push(url);
@@ -51,6 +53,7 @@ urls.forEach(function(url) {
     results[url] = {
         input: 0,
         output: 0,
+        gzip: 0,
         log: ""
     };
     fetch(url, function(err, res) {
@@ -61,6 +64,10 @@ urls.forEach(function(url) {
         }).pipe(uglifyjs.stdin);
         uglifyjs.stdout.on("data", function(data) {
             results[url].output += data.length;
+        }).pipe(zlib.createGzip({
+            level: zlib.Z_BEST_COMPRESSION
+        })).on("data", function(data) {
+            results[url].gzip += data.length;
         }).pipe(createHash("sha1")).on("data", function(data) {
             results[url].sha1 = data.toString("hex");
             done();

test/compress/collapse_vars.js

@@ -863,7 +863,7 @@ collapse_vars_unary: {
     input: {
         function f0(o, p) {
             var x = o[p];
-            delete x;
+            return delete x;
         }
         function f1(n) {
             var k = !!n;
@@ -893,7 +893,7 @@ collapse_vars_unary: {
     expect: {
         function f0(o, p) {
             var x = o[p];
-            delete x;
+            return delete x;
         }
         function f1(n) {
             return n > +!!n

test/compress/dead-code.js

@@ -230,3 +230,82 @@ accessor: {
     }
     expect: {}
 }
+
+issue_2233_1: {
+    options = {
+        pure_getters: "strict",
+        side_effects: true,
+        unsafe: true,
+    }
+    input: {
+        Array.isArray;
+        Boolean;
+        console.log;
+        Error.name;
+        Function.length;
+        Math.random;
+        Number.isNaN;
+        RegExp;
+        Object.defineProperty;
+        String.fromCharCode;
+    }
+    expect: {}
+    expect_stdout: true
+}
+
+issue_2233_2: {
+    options = {
+        pure_getters: "strict",
+        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_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;
+    }
+}

test/compress/drop-unused.js

@@ -1090,6 +1090,7 @@ var_catch_toplevel: {
             a--;
             try {
                 a++;
+                x();
             } catch(a) {
                 if (a) var a;
                 var a = 10;
@@ -1099,9 +1100,8 @@ var_catch_toplevel: {
     }
     expect: {
         !function() {
-            a--;
             try {
-                a++;
+                x();
             } catch(a) {
                 var a;
             }
@@ -1153,3 +1153,89 @@ issue_2105: {
     }
     expect_stdout: "PASS"
 }
+
+issue_2226_1: {
+    options = {
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        function f1() {
+            var a = b;
+            a += c;
+        }
+        function f2(a) {
+            a <<= b;
+        }
+        function f3(a) {
+            --a;
+        }
+        function f4() {
+            var a = b;
+            return a *= c;
+        }
+        function f5(a) {
+            x(a /= b);
+        }
+    }
+    expect: {
+        function f1() {
+            b;
+            c;
+        }
+        function f2(a) {
+            b;
+        }
+        function f3(a) {
+            0;
+        }
+        function f4() {
+            var a = b;
+            return a *= c;
+        }
+        function f5(a) {
+            x(a /= b);
+        }
+    }
+}
+
+issue_2226_2: {
+    options = {
+        cascade: true,
+        sequences: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            a += b;
+            return a;
+        }(1, 2));
+    }
+    expect: {
+        console.log(function(a, b) {
+            return a += b;
+        }(1, 2));
+    }
+    expect_stdout: "3"
+}
+
+issue_2226_3: {
+    options = {
+        collapse_vars: true,
+        side_effects: true,
+        unused: true,
+    }
+    input: {
+        console.log(function(a, b) {
+            a += b;
+            return a;
+        }(1, 2));
+    }
+    expect: {
+        console.log(function(a, b) {
+            return a += 2;
+        }(1));
+    }
+    expect_stdout: "3"
+}

test/compress/evaluate.js

@@ -1157,3 +1157,31 @@ issue_2207_3: {
     }
     expect_stdout: true
 }
+
+issue_2231_1: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(Object.keys(void 0));
+    }
+    expect: {
+        console.log(Object.keys(void 0));
+    }
+    expect_stdout: true
+}
+
+issue_2231_2: {
+    options = {
+        evaluate: true,
+        unsafe: true,
+    }
+    input: {
+        console.log(Object.getOwnPropertyNames(null));
+    }
+    expect: {
+        console.log(Object.getOwnPropertyNames(null));
+    }
+    expect_stdout: true
+}

test/compress/issue-1034.js

@@ -71,11 +71,13 @@ non_hoisted_function_after_return_2a: {
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:51,16]",
         "WARN: Dropping unused variable a [test/compress/issue-1034.js:48,20]",
         "WARN: Dropping unused function nope [test/compress/issue-1034.js:55,21]",
+        "WARN: pass 0: last_count: Infinity, count: 37",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:53,12]",
         "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:53,12]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:56,12]",
         "WARN: Dropping unused variable b [test/compress/issue-1034.js:51,20]",
         "WARN: Dropping unused variable c [test/compress/issue-1034.js:53,16]",
+        "WARN: pass 1: last_count: 37, count: 18",
     ]
 }
 
@@ -109,11 +111,11 @@ non_hoisted_function_after_return_2b: {
     }
     expect_warnings: [
         // duplicate warnings no longer emitted
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:95,16]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:95,16]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,12]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,12]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:101,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:97,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:97,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:99,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:99,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:103,12]",
     ]
 }
 
@@ -151,10 +153,10 @@ non_hoisted_function_after_return_strict: {
     }
     expect_stdout: "8 7"
     expect_warnings: [
-        'WARN: Dropping unreachable code [test/compress/issue-1034.js:131,16]',
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:134,16]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:137,12]",
-        "WARN: Dropping unused function UnusedFunction [test/compress/issue-1034.js:138,21]"
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:133,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:136,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:139,12]",
+        "WARN: Dropping unused function UnusedFunction [test/compress/issue-1034.js:140,21]",
     ]
 }
 
@@ -194,17 +196,19 @@ non_hoisted_function_after_return_2a_strict: {
     }
     expect_stdout: "5 6"
     expect_warnings: [
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:173,16]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:173,16]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:176,16]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:176,16]",
-        "WARN: Dropping unused variable a [test/compress/issue-1034.js:173,20]",
-        "WARN: Dropping unused function nope [test/compress/issue-1034.js:180,21]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:178,12]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:178,12]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:181,12]",
-        "WARN: Dropping unused variable b [test/compress/issue-1034.js:176,20]",
-        "WARN: Dropping unused variable c [test/compress/issue-1034.js:178,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:175,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:175,16]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:178,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:178,16]",
+        "WARN: Dropping unused variable a [test/compress/issue-1034.js:175,20]",
+        "WARN: Dropping unused function nope [test/compress/issue-1034.js:182,21]",
+        "WARN: pass 0: last_count: Infinity, count: 48",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:180,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:180,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:183,12]",
+        "WARN: Dropping unused variable b [test/compress/issue-1034.js:178,20]",
+        "WARN: Dropping unused variable c [test/compress/issue-1034.js:180,16]",
+        "WARN: pass 1: last_count: 48, count: 29",
     ]
 }
 
@@ -243,10 +247,10 @@ non_hoisted_function_after_return_2b_strict: {
     expect_stdout: "5 6"
     expect_warnings: [
         // duplicate warnings no longer emitted
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:225,16]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:225,16]",
-        "WARN: Dropping unreachable code [test/compress/issue-1034.js:227,12]",
-        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:227,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:229,16]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:229,16]",
         "WARN: Dropping unreachable code [test/compress/issue-1034.js:231,12]",
+        "WARN: Declarations in unreachable code! [test/compress/issue-1034.js:231,12]",
+        "WARN: Dropping unreachable code [test/compress/issue-1034.js:235,12]",
     ]
 }

test/compress/properties.js

@@ -13,8 +13,10 @@ keep_properties: {
 dot_properties: {
     options = {
         properties: true,
+    }
+    beautify = {
         ie8: true,
-    };
+    }
     input: {
         a["foo"] = "bar";
         a["if"] = "if";
@@ -36,8 +38,10 @@ dot_properties: {
 dot_properties_es5: {
     options = {
         properties: true,
+    }
+    beautify = {
         ie8: false,
-    };
+    }
     input: {
         a["foo"] = "bar";
         a["if"] = "if";

test/compress/unicode.js

@@ -15,3 +15,43 @@ unicode_parse_variables: {
         var l০ = 3;
     }
 }
+
+issue_2242_1: {
+    beautify = {
+        ascii_only: false,
+    }
+    input: {
+        console.log("\ud83d", "\ude00", "\ud83d\ude00", "\ud83d@\ude00");
+    }
+    expect_exact: 'console.log("\\ud83d","\\ude00","\ud83d\ude00","\\ud83d@\\ude00");'
+}
+
+issue_2242_2: {
+    beautify = {
+        ascii_only: true,
+    }
+    input: {
+        console.log("\ud83d", "\ude00", "\ud83d\ude00", "\ud83d@\ude00");
+    }
+    expect_exact: 'console.log("\\ud83d","\\ude00","\\ud83d\\ude00","\\ud83d@\\ude00");'
+}
+
+issue_2242_3: {
+    options = {
+        evaluate: false,
+    }
+    input: {
+        console.log("\ud83d" + "\ude00", "\ud83d" + "@" + "\ude00");
+    }
+    expect_exact: 'console.log("\\ud83d"+"\\ude00","\\ud83d"+"@"+"\\ude00");'
+}
+
+issue_2242_4: {
+    options = {
+        evaluate: true,
+    }
+    input: {
+        console.log("\ud83d" + "\ude00", "\ud83d" + "@" + "\ude00");
+    }
+    expect_exact: 'console.log("\ud83d\ude00","\\ud83d@\\ude00");'
+}

test/mocha/cli.js

@@ -63,7 +63,7 @@ describe("bin/uglifyjs", function () {
             if (err) throw err;
 
             assert.strictEqual(stdout, "var bar=function(){function foo(bar){return bar}return foo}();\n" +
-                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DIn0=\n");
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==\n");
             done();
         });
     });
@@ -192,7 +192,7 @@ describe("bin/uglifyjs", function () {
 
             assert.strictEqual(stdout, [
                 "var bar=function(){function foo(bar){return bar}return foo}();",
-                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DIn0=",
+                "//# sourceMappingURL=data:application/json;charset=utf-8;base64,eyJ2ZXJzaW9uIjozLCJzb3VyY2VzIjpbInRlc3QvaW5wdXQvaXNzdWUtMTMyMy9zYW1wbGUuanMiXSwibmFtZXMiOlsiYmFyIiwiZm9vIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFJQSxJQUFNLFdBQ04sU0FBU0MsSUFBS0QsS0FDVixPQUFPQSxJQUdYLE9BQU9DLElBTEQifQ==",
                 "",
             ].join("\n"));
             assert.strictEqual(stderr, "WARN: inline source map not found\n");
@@ -593,8 +593,8 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
-    it("Should work with --mangle reserved=[]", function (done) {
-        var command = uglifyjscmd + ' test/input/issue-505/input.js -m reserved=[callback]';
+    it("Should work with --mangle reserved=[]", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js -m reserved=[callback]";
 
         exec(command, function (err, stdout) {
             if (err) throw err;
@@ -603,8 +603,8 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
-    it("Should work with --mangle reserved=false", function (done) {
-        var command = uglifyjscmd + ' test/input/issue-505/input.js -m reserved=false';
+    it("Should work with --mangle reserved=false", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js -m reserved=false";
 
         exec(command, function (err, stdout) {
             if (err) throw err;
@@ -613,4 +613,22 @@ describe("bin/uglifyjs", function () {
             done();
         });
     });
+    it("Should fail with --mangle-props reserved=[in]", function(done) {
+        var command = uglifyjscmd + " test/input/issue-505/input.js --mangle-props reserved=[in]";
+        exec(command, function (err, stdout, stderr) {
+            assert.ok(err);
+            assert.strictEqual(stdout, "");
+            assert.ok(/^Supported options:\n[\s\S]*?\nERROR: `reserved=\[in]` is not a supported option/.test(stderr), stderr);
+            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");
+            done();
+        });
+    });
 });

test/mocha/let.js

@@ -2,16 +2,17 @@ var Uglify = require('../../');
 var assert = require("assert");
 
 describe("let", function() {
-    it("Should not produce reserved keywords as variable name in mangle", function(done) {
-        this.timeout(10000);
-
+    this.timeout(30000);
+    it("Should not produce reserved keywords as variable name in mangle", function() {
         // Produce a lot of variables in a function and run it through mangle.
         var s = '"dddddeeeeelllllooooottttt"; function foo() {';
         for (var i = 0; i < 18000; i++) {
             s += "var v" + i + "=0;";
         }
         s += '}';
-        var result = Uglify.minify(s, {compress: false});
+        var result = Uglify.minify(s, {
+            compress: false
+        }).code;
 
         // Verify that select keywords and reserved keywords not produced
         [
@@ -19,7 +20,7 @@ describe("let", function() {
             "let",
             "var",
         ].forEach(function(name) {
-            assert.strictEqual(result.code.indexOf("var " + name + "="), -1);
+            assert.strictEqual(result.indexOf("var " + name + "="), -1);
         });
 
         // Verify that the variable names that appeared immediately before
@@ -30,9 +31,27 @@ describe("let", function() {
             "eet", "fet",
             "rar", "oar",
         ].forEach(function(name) {
-            assert.ok(result.code.indexOf("var " + name + "=") >= 0);
+            assert.notStrictEqual(result.indexOf("var " + name + "="), -1);
+        });
+    });
+    it("Should quote mangled properties that are reserved keywords", function() {
+        var s = '"rrrrrnnnnniiiiiaaaaa";';
+        for (var i = 0; i < 18000; i++) {
+            s += "v.b" + i + ";";
+        }
+        var result = Uglify.minify(s, {
+            compress: false,
+            ie8: true,
+            mangle: {
+                properties: true,
+            }
+        }).code;
+        [
+            "in",
+            "var",
+        ].forEach(function(name) {
+            assert.notStrictEqual(result.indexOf(name), -1);
+            assert.notStrictEqual(result.indexOf('v["' + name + '"]'), -1);
         });
-
-        done();
     });
 });

test/mocha/string-literal.js

@@ -78,4 +78,41 @@ describe("String literals", function() {
         assert.equal(UglifyJS.parse('"use strict";"\\08"').print_to_string(), '"use strict";"\\08";');
         assert.equal(UglifyJS.parse('"use strict";"\\09"').print_to_string(), '"use strict";"\\09";');
     });
+
+    it("Should not unescape unpaired surrogates", function() {
+        var code = [];
+        for (var i = 0; i <= 0xF; i++) {
+            code.push("\\u000" + i.toString(16));
+        }
+        for (;i <= 0xFF; i++) {
+            code.push("\\u00" + i.toString(16));
+        }
+        for (;i <= 0xFFF; i++) {
+            code.push("\\u0" + i.toString(16));
+        }
+        for (; i <= 0xFFFF; i++) {
+            code.push("\\u" + i.toString(16));
+        }
+        code = '"' + code.join() + '"';
+        var normal = UglifyJS.minify(code, {
+            compress: false,
+            mangle: false,
+            output: {
+                ascii_only: false
+            }
+        });
+        if (normal.error) throw normal.error;
+        assert.ok(code.length > normal.code.length);
+        assert.strictEqual(eval(code), eval(normal.code));
+        var ascii = UglifyJS.minify(code, {
+            compress: false,
+            mangle: false,
+            output: {
+                ascii_only: false
+            }
+        });
+        if (ascii.error) throw ascii.error;
+        assert.ok(code.length > ascii.code.length);
+        assert.strictEqual(eval(code), eval(ascii.code));
+    });
 });