diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug885648.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug885648.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+gczeal(4,1);
+var iterable = {persistedProp: 17};
+iterable.__iterator__ = function() {
+    yield ["foo", 2];
+    yield ["bar", 3];
+};
+var it = Iterator(iterable);
+assertEq(it.next().toString(), "foo,2");
+assertEq(it.next().toString(), "bar,3");