diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug642772-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug642772-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// Catch memory leaks when enumerating over the global object.
+
+for (let z = 1; z <= 16000; ++z) {
+  for each (y in this);
+}