diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_5/extensions/regress-300079.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_5/extensions/regress-300079.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,47 @@
+/* -*- 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 = 300079;
+var summary = "precompiled functions should inherit from current window's Function.prototype";
+var actual = '';
+var expect = '';
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+function test()
+{
+  enterFunc ('test');
+  printBugNumber(BUGNUMBER);
+  printStatus (summary);
+
+  if (typeof clone == 'undefined') {
+    expect = 'SKIPPED';
+    actual = 'SKIPPED';
+  }
+  else {
+    expect = 'PASSED';
+
+    f = evaluate("(function () { return a * a; })", {compileAndGo: false});
+    g = clone(f, {a: 3});
+    f = null;
+    gc();
+    try {
+      a_squared = g(2);
+      if (a_squared != 9)
+        throw "Unexpected return from g: a_squared == " + a_squared;
+      actual = "PASSED";
+    } catch (e) {
+      actual = "FAILED: " + e;
+    }
+  }
+ 
+  reportCompare(expect, actual, summary);
+
+  exitFunc ('test');
+}