diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_6/Array/regress-415451.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_6/Array/regress-415451.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+/* -*- 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 = 415451;
+var summary = 'indexOf/lastIndexOf behavior';
+
+var expected = "3,0,3,3,3,-1,-1";
+results = [];
+var a = [1,2,3,1];
+for (var i=-1; i < a.length+2; i++)
+  results.push(a.indexOf(1,i));
+var actual = String(results);
+reportCompare(expected, actual, "indexOf");
+
+results = [];
+var expected = "3,0,0,0,3,3,3";
+for (var i=-1; i < a.length+2; i++)
+  results.push(a.lastIndexOf(1,i));
+var actual = String(results);
+reportCompare(expected, actual, "lastIndexOf");
+