diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/debug/Object-defineProperty-02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/debug/Object-defineProperty-02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+// obj.defineProperty can define a data property with object value.
+
+var g = newGlobal();
+g.eval("var a = {};");
+var dbg = new Debugger;
+var gw = dbg.addDebuggee(g);
+var desc = gw.getOwnPropertyDescriptor("a");
+assertEq(desc.value instanceof Debugger.Object, true);
+gw.defineProperty("b", desc);
+assertEq(g.a, g.b);