diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/Set-iterator-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/Set-iterator-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// Iterating over a set of objects yields those exact objects.
+
+var arr = [{}, {}, {}, [], /xyz/, new Date];
+var set = Set(arr);
+assertEq(set.size, arr.length);
+
+var i = 0;
+for (var x of set)
+    assertEq(x, arr[i++]);
+assertEq(i, arr.length);
+