diff options
| -rw-r--r-- | lib/compress.js | 4 | ||||
| -rw-r--r-- | test/compress/drop-unused.js | 31 |
2 files changed, 33 insertions, 2 deletions
diff --git a/lib/compress.js b/lib/compress.js index aec31a48..8c1ed5b3 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -455,7 +455,7 @@ merge(Compressor.prototype, { if (def.fixed == null) { if (is_arguments(def)) return false; if (def.global && def.name == "arguments") return false; - def.fixed = make_node(AST_Undefined, def.orig); + def.fixed = make_node(AST_Undefined, def.orig[0]); } return true; } @@ -3870,7 +3870,7 @@ merge(Compressor.prototype, { def.value = null; head.push(def); } else { - var value = def.value && def.value.drop_side_effect_free(compressor); + var value = def.value && !def.value.single_use && def.value.drop_side_effect_free(compressor); if (value) { AST_Node.warn("Side effects in initialization of unused variable {name} [{file}:{line},{col}]", template(def.name)); side_effects.push(value); diff --git a/test/compress/drop-unused.js b/test/compress/drop-unused.js index 297fa01a..15420d8a 100644 --- a/test/compress/drop-unused.js +++ b/test/compress/drop-unused.js @@ -2235,3 +2235,34 @@ function_assign: { } expect_stdout: "PASS" } + +issue_3598: { + options = { + collapse_vars: true, + reduce_vars: true, + unused: true, + } + input: { + var a = "FAIL"; + try { + (function() { + var b = void 0; + a = "PASS"; + c.p = 0; + var c = b[!1]; + })(); + } catch (e) {} + console.log(a); + } + expect: { + var a = "FAIL"; + try { + (function() { + a = "PASS"; + var c = (void (c.p = 0))[!1]; + })(); + } catch (e) {} + console.log(a); + } + expect_stdout: "PASS" +} |