diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/regress/regress-598176.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/regress/regress-598176.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+function make() {
+  var r = {};
+  r.desc = {get: function() {}};
+  r.a = Object.defineProperty({}, "prop", r.desc);
+  r.info = Object.getOwnPropertyDescriptor(r.a, "prop");
+  return r;
+}
+
+r1 = make();
+assertEq(r1.desc.get, r1.info.get);
+
+// Distinct evaluations of an object literal make distinct methods.
+r2 = make();
+assertEq(r1.desc.get === r2.desc.get, false);
+
+r1.info.get.foo = 42;
+
+assertEq(r1.desc.get.hasOwnProperty('foo'), !r2.desc.get.hasOwnProperty('foo'));
+assertEq(r1.info.get.hasOwnProperty('foo'), !r2.info.get.hasOwnProperty('foo'));
+
+reportCompare(0, 0, "ok");