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diff --git a/js/src/tests/non262/Exceptions/regress-121658.js b/js/src/tests/non262/Exceptions/regress-121658.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 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/. */
+
+/*
+ *
+ * Date: 24 Jan 2002
+ * SUMMARY: "Too much recursion" errors should be safely caught by try...catch
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=121658
+ *
+ * In the cases below, we expect i>0. The bug was filed because we
+ * were getting i===0; i.e. |i| did not retain the value it had at the
+ * location of the error.
+ *
+ */
+//-----------------------------------------------------------------------------
+var UBound = 0;
+var BUGNUMBER = 121658;
+var msg = '"Too much recursion" errors should be safely caught by try...catch';
+var TEST_PASSED = 'i retained the value it had at location of error';
+var TEST_FAILED = 'i did NOT retain this value';
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+var i;
+
+
+function f()
+{
+ ++i;
+
+ // try...catch should catch the "too much recursion" error to ensue
+ try
+ {
+ f();
+ }
+ catch(e)
+ {
+ }
+}
+
+i=0;
+f();
+status = inSection(1);
+actual = (i>0);
+expect = true;
+addThis();
+
+
+
+// Now try in function scope -
+function g()
+{
+ f();
+}
+
+i=0;
+g();
+status = inSection(2);
+actual = (i>0);
+expect = true;
+addThis();
+
+
+
+// Now try in eval scope -
+var sEval = 'function h(){++i; try{h();} catch(e){}}; i=0; h();';
+eval(sEval);
+status = inSection(3);
+actual = (i>0);
+expect = true;
+addThis();
+
+
+
+// Try in eval scope and mix functions up -
+sEval = 'function a(){++i; try{h();} catch(e){}}; i=0; a();';
+eval(sEval);
+status = inSection(4);
+actual = (i>0);
+expect = true;
+addThis();
+
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+ statusitems[UBound] = status;
+ actualvalues[UBound] = formatThis(actual);
+ expectedvalues[UBound] = formatThis(expect);
+ UBound++;
+}
+
+
+function formatThis(bool)
+{
+ return bool? TEST_PASSED : TEST_FAILED;
+}
+
+
+function test()
+{
+ printBugNumber(BUGNUMBER);
+ printStatus(msg);
+
+ for (var i=0; i<UBound; i++)
+ {
+ reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+ }
+}