From: Mihai Bazon <mihai.bazon@gmail.com>
Date: Fri, 10 Apr 2015 08:33:29 +0000 (+0300)
Subject: Use the `before` visitor in mangle props
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=e04ef562435547e286019fdee46dd0b89b9822df;p=UglifyJS.git

Use the `before` visitor in mangle props

(works around a bug in our tree walker which, while cloning nodes, breaks
references between labeled statements and break/continue labels)
---

diff --git a/lib/propmangle.js b/lib/propmangle.js
index f79b4748..46fb7521 100644
--- a/lib/propmangle.js
+++ b/lib/propmangle.js
@@ -102,7 +102,7 @@ function mangle_properties(ast, options) {
     }));
 
     // step 2: transform the tree, renaming properties
-    return ast.transform(new TreeTransformer(null, function(node){
+    return ast.transform(new TreeTransformer(function(node){
         if (node instanceof AST_ObjectKeyVal) {
             if (should_mangle(node.key)) {
                 node.key = mangle(node.key);