diff -r 3b67f27bb908 -r d549cbb5503d mercurial/peer.py
--- a/mercurial/peer.py	Thu Mar 03 14:29:19 2016 +0000
+++ b/mercurial/peer.py	Tue Mar 01 16:37:56 2016 -0500
@@ -39,7 +39,7 @@
             return resref
         return call
     def submit(self):
-        pass
+        raise NotImplementedError()
 
 class localbatch(batcher):
     '''performs the queued calls directly'''