diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8/extensions/regress-419091.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8/extensions/regress-419091.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+// |reftest| skip
+/* -*- 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 = 419091;
+var summary = 'Do not assert: JS_PROPERTY_CACHE(cx).disabled >= 0';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  if (typeof scatter == 'undefined')
+  {
+    print(expect = actual = 'Test skipped. Requires scatter.');
+  }
+  else
+  {
+    if (typeof gczeal == 'undefined')
+    {
+      gczeal = (function () {});
+    }
+
+    gczeal(2);
+
+    function f() {
+      for (let i = 0; i < 10; i++) {
+        let y = { x: i }
+      }
+    }
+
+    for (let i = 0; i < 10; i++)
+      scatter([f, f]);
+
+    gczeal(0);
+  }
+
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}