diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/extensions/regress-bug607284.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/extensions/regress-bug607284.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,16 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+if ("evalcx" in this) {
+  var sandbox = evalcx("");
+  var obj = { get foo() { throw("FAIL"); } };
+  var getter = obj.__lookupGetter__("foo");
+  var desc = sandbox.Object.getOwnPropertyDescriptor(obj, "foo");
+  reportCompare(desc.get, getter, "getter is correct");
+  reportCompare(desc.set, undefined, "setter is correct");
+}
+else {
+  reportCompare(true, true);
+}