For the record, the hg-prompt extension is broken with 2.9: [...] File "/home/antoine/hg-prompt/prompt.py", line 350, in _update if not repo.branchtags(): File "/home/antoine/.local/lib/python2.7/site-packages/mercurial/repoview.py", line 199, in __getattr__ return getattr(self._unfilteredrepo, attr) Regards Antoine.