diff options
| -rw-r--r-- | lib/compress.js | 3 | ||||
| -rw-r--r-- | test/compress/dead-code.js | 21 |
2 files changed, 23 insertions, 1 deletions
diff --git a/lib/compress.js b/lib/compress.js index c8c08a0e..a56e9331 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -3938,7 +3938,8 @@ merge(Compressor.prototype, { }); def(AST_Binary, function(compressor) { return this.left.may_throw(compressor) - || this.right.may_throw(compressor); + || this.right.may_throw(compressor) + || this.operator == "in" && !is_object(this.right.tail_node()); }); def(AST_Block, function(compressor) { return any(this.body, compressor); diff --git a/test/compress/dead-code.js b/test/compress/dead-code.js index 22eb0d91..5506b95a 100644 --- a/test/compress/dead-code.js +++ b/test/compress/dead-code.js @@ -1193,3 +1193,24 @@ self_assignments: { } expect_stdout: "PASS 2 PASS PASS" } + +issue_3967: { + options = { + dead_code: true, + } + input: { + var a = "FAIL"; + try { + a = 0 in (a = "PASS"); + } catch (e) {} + console.log(a); + } + expect: { + var a = "FAIL"; + try { + a = 0 in (a = "PASS"); + } catch (e) {} + console.log(a); + } + expect_stdout: "PASS" +} |