tests/crashgetbundler.py

revset: fix merge() to fall back to changectx API if wdir specified

I have a code which basically runs "0:wdir() & <user-revset>", and it crashed
if merge() were passed in.

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)