diff -r 000000000000 -r 6474c204b198 js/xpconnect/tests/unit/test_bug885800.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/xpconnect/tests/unit/test_bug885800.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,13 @@
+const Cu = Components.utils;
+
+function run_test() {
+  var sb = new Cu.Sandbox('http://www.example.com');
+  var obj = Cu.evalInSandbox('this.obj = {foo: 2}; obj', sb);
+  var chromeSb = new Cu.Sandbox(this);
+  chromeSb.objRef = obj;
+  do_check_eq(Cu.evalInSandbox('objRef.foo', chromeSb), 2);
+  Cu.nukeSandbox(sb);
+  do_check_true(Cu.isDeadWrapper(obj));
+  // CCWs to nuked wrappers should be considered dead.
+  do_check_true(Cu.isDeadWrapper(chromeSb.objRef));
+}