fix dead_code on block-scoped function under "use strict" (#2006)

Technically not part of ES5, but commonly used code exists in the wild.
2017-05-26 16:08:51 +08:00
parent c70fb60384
commit dc33facfcb
3 changed files with 220 additions and 3 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1222,7 +1222,7 @@ merge(Compressor.prototype, {
                target.push(node);
                return true;
            }
-            if (node instanceof AST_Defun) {
+            if (node instanceof AST_Defun && (node === stat || !compressor.has_directive("use strict"))) {
                target.push(node);
                return true;
            }