--- PackageJob.py	2006-10-03 22:46:25.000000000 -0400
+++ PackageJob.py-die-fix	2006-10-26 21:33:51.000000000 -0400
@@ -707,7 +707,8 @@
     def _kill_all_archjobs(self, user_requested=False):
         self._archjobs_lock.acquire()
         for job in self._archjobs.values():
-            job.die(user_requested)
+            if job != None:
+                job.die(user_requested)
         self._archjobs_lock.release()
 
     def wake(self):