diff -r 000000000000 -r 6474c204b198 content/base/crashtests/700512-worker.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/crashtests/700512-worker.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7 @@
+onmessage = function(event) {
+  var blob = event.data;
+
+  blob.slice(1, 5);
+
+  postMessage("done");
+}