diff -r 000000000000 -r 6474c204b198 dom/workers/test/importScripts_worker_imported4.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/workers/test/importScripts_worker_imported4.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,6 @@
+/**
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+// Deliberate throw, should generate a worker exception!
+throw new Error("Bah!");