fix crash in unsafe replacement of undefined

remove extraneous call to AST_SymbolRef.reference() closes #1443
2017-02-18 18:58:23 +08:00
parent dd31d12a91
commit 11676f9d72
2 changed files with 70 additions and 3 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2721,13 +2721,11 @@ merge(Compressor.prototype, {
            var scope = compressor.find_parent(AST_Scope);
            var undef = scope.find_variable("undefined");
            if (undef) {
-                var ref = make_node(AST_SymbolRef, self, {
+                return make_node(AST_SymbolRef, self, {
                    name   : "undefined",
                    scope  : scope,
                    thedef : undef
                });
-                ref.reference();
-                return ref;
            }
        }
        return self;