diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-591897.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-591897.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+// |reftest| skip
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+// Contributor: Gary Kwong <gary@rumblingedge.com>
+
+var expect = 42;
+var actual = (function({
+    x: [w]
+},
+x) {
+    with({}) {return w;}
+})({x:[42]});
+
+reportCompare(expect, actual, "ok");