diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_7/iterable/regress-568056.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_7/iterable/regress-568056.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+var BUGNUMBER = 568056;
+var summary = "Iterator(obj) must not go up obj's prototype chain";
+
+var foo = {
+    z: 9,
+};
+
+var bar = {
+    __proto__: foo,
+    a: 1,
+    b: 2,
+};
+
+var results = [];
+for each (let [key, value] in Iterator(bar))
+    results.push(key + ":" + value);
+
+var actual = results.join(';')
+var expect = "a:1;b:2";
+
+reportCompare(expect, actual, summary);