diff -r 000000000000 -r 6474c204b198 js/src/tests/js1_8_5/extensions/toSource-0.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/js1_8_5/extensions/toSource-0.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,14 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+ 
+assertEq(eval(uneval('\x001')), '\x001');
+
+f = eval('(' + (function () { return '\x001'; }).toString() + ')');
+assertEq(f(), '\x001');
+
+assertEq(eval('\x001'.toSource()) == '\x001', true);
+
+if (typeof reportCompare === 'function')
+  reportCompare(true, true);