diff -r 000000000000 -r 6474c204b198 xpcom/tests/unit/test_bug332389.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/tests/unit/test_bug332389.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,19 @@
+var Cc = Components.classes;
+var Ci = Components.interfaces;
+
+function run_test() {
+  var f =
+      Cc["@mozilla.org/file/directory_service;1"].
+      getService(Ci.nsIProperties).get("CurProcD", Ci.nsIFile);
+
+  var terminated = false;
+  for (var i = 0; i < 100; i++) {
+    if (f == null) {
+      terminated = true;
+      break;
+    }
+    f = f.parent;
+  }
+
+  do_check_true(terminated);
+}