diff -r 000000000000 -r 6474c204b198 xpcom/tests/unit/test_bug333505.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/tests/unit/test_bug333505.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+function run_test()
+{
+  var dirEntries = do_get_cwd().directoryEntries;
+
+  while (dirEntries.hasMoreElements())
+    dirEntries.getNext();
+
+  // We ensure there is no crash
+  dirEntries.hasMoreElements();
+}