Don't try and reap what already has been

salt/utils/event.py

@@ -520,6 +520,11 @@ class RunnerEvent(MasterEvent):
                           'outputter': outputter}
         self.fire_event(progress_event, tagify([self.jid, 'progress'], 'runner'))
 
+    def __del__(self):
+        # The runners should be cleaning up their own sockets. This is a no-op if run here
+        # and causes AttributeErrors.
+        pass
+
 
 class MinionEvent(SaltEvent):
     '''