diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-634210-3.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-634210-3.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var a = [];
+for (var i = 0; i < 2; i++) {
+    a[i] = {m: function () {}};
+    Object.defineProperty(a[i], "m", {configurable: false});
+}
+assertEq(a[0].m === a[1].m, false);
+
+reportCompare(0, 0, "ok");