diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/for-of/next-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/for-of/next-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// Iterator.prototype.next throws if applied to a value that isn't an iterator.
+
+load(libdir + "asserts.js");
+for (var v of [null, undefined, false, 0, "ponies", {}, [], this])
+    assertThrowsInstanceOf(function () { Iterator.prototype.next.call(v); }, TypeError);