diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/next-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/next-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+// Iterator.prototype.next throws if applied to a non-iterator that inherits from an iterator.
+
+load(libdir + "asserts.js");
+load(libdir + "iteration.js");
+
+var it = [1, 2][std_iterator]();
+var v = Object.create(it);
+assertThrowsInstanceOf(function () { Iterator.prototype.next.call(v); }, TypeError);