diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/Array/regress-599159.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/Array/regress-599159.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var b = Object.create(Array.prototype);
+b.length = 12;
+assertEq(b.length, 12);
+
+reportCompare(true,true);