diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/Set-iterator-proxies-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/Set-iterator-proxies-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,20 @@
+// map.iterator() and iter.next() are non-generic but work on cross-compartment wrappers.
+
+load(libdir + "asserts.js");
+load(libdir + "iteration.js");
+
+var g = newGlobal();
+
+var iterator_fn = Set.prototype[std_iterator];
+assertThrowsInstanceOf(function () { iterator_fn.call({}); }, TypeError);
+assertThrowsInstanceOf(function () { iterator_fn.call(Map()); }, TypeError);
+var setw = g.eval("Set(['x', 'y'])");
+assertIteratorNext(iterator_fn.call(setw), "x");
+
+var next_fn = Set()[std_iterator]().next;
+assertThrowsInstanceOf(function () { next_fn.call({}); }, TypeError);
+assertThrowsInstanceOf(function () { next_fn.call(Map()[std_iterator]()); }, TypeError);
+var iterw = setw[std_iterator]();
+assertIteratorResult(next_fn.call(iterw), "x", false);
+assertIteratorResult(next_fn.call(iterw), "y", false);
+assertIteratorResult(next_fn.call(iterw), undefined, true);