diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-646820-2.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-646820-2.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,11 @@
+// Any copyright is dedicated to the Public Domain.
+// http://creativecommons.org/licenses/publicdomain/
+
+(function () {
+    var obj = {prop: 1};
+    var [x, {prop: y}] = [function () y, obj];
+    assertEq(y, 1);
+    assertEq(x(), 1);
+})();
+
+reportCompare(0, 0, 'ok');