diff options
| -rw-r--r-- | lib/compress.js | 9 | ||||
| -rw-r--r-- | test/compress/drop-unused.js | 21 |
2 files changed, 27 insertions, 3 deletions
diff --git a/lib/compress.js b/lib/compress.js index 1f86c5b6..2df76f5f 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -2906,9 +2906,12 @@ merge(Compressor.prototype, { var fixed = this.fixed_value(); if (!fixed) return true; this._dot_throw = return_true; - var result = fixed._dot_throw(compressor); - delete this._dot_throw; - return result; + if (fixed._dot_throw(compressor)) { + delete this._dot_throw; + return true; + } + this._dot_throw = return_false; + return false; }); def(AST_UnaryPrefix, function() { return this.operator == "void"; diff --git a/test/compress/drop-unused.js b/test/compress/drop-unused.js index 46f273e9..eadf279a 100644 --- a/test/compress/drop-unused.js +++ b/test/compress/drop-unused.js @@ -2924,3 +2924,24 @@ forin_var_2: { } expect_stdout: "undefined" } + +issue_4133: { + options = { + evaluate: true, + merge_vars: true, + pure_getters: "strict", + reduce_vars: true, + toplevel: true, + unused: true, + } + input: { + var a = 1; + var b = [ a-- ], c = b && b[c]; + console.log(a); + } + expect: { + var b = 1; + console.log(0); + } + expect_stdout: "0" +} |