diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/regress-319683.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/regress-319683.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 319683;
+var summary = 'Do not crash in call_enumerate';
+var actual = 'No Crash';
+var expect = 'No Crash';
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+function crash(){
+  function f(){
+    var x;
+    function g(){
+      x=1; //reference anything here or will not crash.
+    }
+  }
+
+  //apply an object to the __proto__ attribute
+  f.__proto__={};
+
+  //the following call will cause crash
+  f();
+} 
+
+crash();
+
+reportCompare(expect, actual, summary);