diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/Set-iterator-proxies-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/Set-iterator-proxies-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,8 @@
+// for-of works on a cross-compartment wrapper of a Set.
+
+var g = newGlobal();
+var mw = g.eval("Set(['a', 'b', 1, 2])");
+var log = '';
+for (let x of mw)
+    log += x;
+assertEq(log, "ab12");