diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-234389.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-234389.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,39 @@
+/* -*- 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 = 234389;
+var summary = 'Do not Crash when overloaded toString causes infinite recursion';
+var actual = ''
+  var expect = 'Internal Error: too much recursion';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+var foo = {
+  toString: function() {
+    if (this.re.test(this)) {
+      return "";
+    }
+    return this.value;
+  },
+ 
+  value: "foo",
+ 
+  re: /bar/
+};
+
+try
+{
+  var f = foo.toString();
+  expect = 'No Crash';
+  actual = 'No Crash';
+}
+catch(ex)
+{
+  expect = 'InternalError: too much recursion';
+  actual = ex.name + ': ' + ex.message;
+}
+reportCompare(expect, actual, summary);