diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/collections/iterator-gc.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/collections/iterator-gc.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+// An iterator keeps its data alive.
+
+load(libdir + "iteration.js");
+
+load(libdir + "referencesVia.js");
+var key = {};
+
+function test(obj, edgeName) {
+    var iter = obj[std_iterator]();
+    referencesVia(iter, "**UNKNOWN SLOT 0**", obj);
+    referencesVia(obj, edgeName, key);
+}
+
+test([key],                 "element[0]");
+test(Map([[key, 'value']]), "key");
+test(Set([key]),            "key");