diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/Regress/regress-256501.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/Regress/regress-256501.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,38 @@
+/* -*- 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 = 256501;
+var summary = 'Check Recursion';
+var actual = '';
+var expect = '';
+
+printBugNumber(BUGNUMBER);
+printStatus (summary);
+
+expect = 'error';
+
+try
+{ 
+  var N = 100*1000;
+  var buffer = new Array(N * 2 + 1);
+  for (var i = 0; i != N; ++i)
+  {
+    buffer[i] = 'do ';
+    buffer[buffer.length - i - 1] = ' while(0);';
+  }
+  buffer[N] = 'printStatus("TEST");';
+
+  // text is do do ... do print("TEST"); while(0); while(0); ... while(0);
+  var text = buffer.join('');
+
+  eval(text);
+  actual = 'no error';
+}
+catch(e)
+{
+  actual = 'error';
+}
+reportCompare(expect, actual, summary);