diff options
Diffstat (limited to 'lib/compress.js')
| -rw-r--r-- | lib/compress.js | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/lib/compress.js b/lib/compress.js index b79a5088..083b5d29 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -86,13 +86,14 @@ merge(Compressor.prototype, { before: function(node, descend, in_list) { if (node._squeezed) return node; if (node instanceof AST_Scope) { - node.drop_unused(this); + //node.drop_unused(this); node = node.hoist_declarations(this); } descend(node, this); node = node.optimize(this); if (node instanceof AST_Scope) { node.drop_unused(this); + descend(node, this); } node._squeezed = true; return node; @@ -1082,18 +1083,23 @@ merge(Compressor.prototype, { } return node; } - if (node instanceof AST_For && node.init instanceof AST_BlockStatement) { + if (node instanceof AST_For) { descend(node, this); - // certain combination of unused name + side effect leads to: - // https://github.com/mishoo/UglifyJS2/issues/44 - // that's an invalid AST. - // We fix it at this stage by moving the `var` outside the `for`. - var body = node.init.body.slice(0, -1); - node.init = node.init.body.slice(-1)[0].body; - body.push(node); - return in_list ? MAP.splice(body) : make_node(AST_BlockStatement, node, { - body: body - }); + + if (node.init instanceof AST_BlockStatement) { + // certain combination of unused name + side effect leads to: + // https://github.com/mishoo/UglifyJS2/issues/44 + // that's an invalid AST. + // We fix it at this stage by moving the `var` outside the `for`. + + var body = node.init.body.slice(0, -1); + node.init = node.init.body.slice(-1)[0].body; + body.push(node); + + return in_list ? MAP.splice(body) : make_node(AST_BlockStatement, node, { + body: body + }); + } } if (node instanceof AST_Scope && node !== self) return node; |