diff options
| -rw-r--r-- | lib/compress.js | 5 | ||||
| -rw-r--r-- | test/compress/dead-code.js | 17 |
2 files changed, 22 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js index eb359df9..249b551a 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -7670,6 +7670,11 @@ merge(Compressor.prototype, { if (is_reachable(scope, [ def ])) break; def.fixed = false; return strip_assignment(); + } else if (parent instanceof AST_VarDef) { + if (parent.name.definition() !== def) continue; + if (in_try(level, parent)) break; + def.fixed = false; + return strip_assignment(); } } while (parent instanceof AST_Binary && parent.right === node || parent instanceof AST_Sequence && parent.tail_node() === node diff --git a/test/compress/dead-code.js b/test/compress/dead-code.js index 5a7be3c7..a1fb9483 100644 --- a/test/compress/dead-code.js +++ b/test/compress/dead-code.js @@ -1151,3 +1151,20 @@ issue_3830_6: { } expect_stdout: "PASS" } + +redundant_assignments: { + options = { + dead_code: true, + } + input: { + var a = a = "PASS", b = "FAIL"; + b = b = "PASS"; + console.log(a, b); + } + expect: { + var a = "PASS", b = "FAIL"; + b = "PASS"; + console.log(a, b); + } + expect_stdout: "PASS PASS" +} |