mercurial/commands.py

--- a/mercurial/commands.py	Sat Jul 28 23:28:36 2012 +0200
+++ b/mercurial/commands.py	Thu Oct 04 19:46:43 2012 +0200
@@ -3538,7 +3538,7 @@
 
     if source:
         source, branches = hg.parseurl(ui.expandpath(source))
-        peer = hg.peer(ui, opts, source)
+        peer = hg.peer(repo or ui, opts, source) # only pass ui when no repo
         repo = peer.local()
         revs, checkout = hg.addbranchrevs(repo, peer, branches, None)