diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/basic/bug596351-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/basic/bug596351-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,5 @@
+// |jit-test| error: TypeError
+"use strict"
+var g = newGlobal();
+g.eval("foo = {}; Object.defineProperty(foo, 'a', {value: 2, writable: false});");
+g.foo.a = 3;