tests/crashgetbundler.py

diffordiffstat: avoid looking up contexts twice

I'm not worried about performance; this is just simpler.

Differential Revision: https://phab.mercurial-scm.org/D5890

from __future__ import absolute_import

from mercurial.i18n import _
from mercurial import (
        changegroup,
        error,
        extensions
    )

def abort(orig, *args, **kwargs):
    raise error.Abort(_('this is an exercise'))

def uisetup(ui):
    extensions.wrapfunction(changegroup, 'getbundler', abort)