diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/regress-314874.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/regress-314874.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* -*- 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 = 314874;
+var summary = 'Function.call/apply with non-primitive argument';
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+ 
+  var thisArg = { valueOf: function() { return {a: 'a', b: 'b'}; } };
+
+  var f = function () { return (this); };
+
+  expect  = f.call(thisArg);
+
+  thisArg.f = f;
+
+  actual = thisArg.f();
+
+  delete thisArg.f;
+
+  expect = expect.toSource();
+  actual = actual.toSource();
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}