diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/geniter/throw-forever.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/geniter/throw-forever.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,85 @@
+/* -*- 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     = "(none)";
+var summary = "gen.throw(ex) returns ex for an exhausted gen";
+var actual, expect;
+
+printBugNumber(BUGNUMBER);
+printStatus(summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function gen()
+{
+  var x = 5, y = 7;
+  var z = x + y;
+  yield z;
+}
+
+var failed = false;
+var it = gen();
+
+try
+{
+  // throw works even on newly-initialized generators
+  var thrown = "foobar";
+  var doThrow = true;
+  try
+  {
+    it.throw(thrown);
+  }
+  catch (e)
+  {
+    if (e === thrown)
+      doThrow = false;
+  }
+  if (doThrow)
+    throw "it.throw(\"" + thrown + "\") failed";
+
+  // you can throw stuff at a generator which hasn't
+  // been used yet forever
+  thrown = "baz";
+  doThrow = true;
+  try
+  {
+    it.throw(thrown);
+  }
+  catch (e)
+  {
+    if (e === thrown)
+      doThrow = false;
+  }
+  if (doThrow)
+    throw "it.throw(\"" + thrown + "\") failed";
+
+  // don't execute a yield -- the uncaught exception
+  // exhausted the generator
+  var stopPassed = false;
+  try
+  {
+    it.next();
+  }
+  catch (e)
+  {
+    if (e === StopIteration)
+      stopPassed = true;
+  }
+
+  if (!stopPassed)
+    throw "missing or incorrect StopIteration";
+}
+catch (e)
+{
+  failed = e;
+}
+
+expect = false;
+actual = failed;
+
+reportCompare(expect, actual, summary);