tests: demonstrate crash caused by pinning of non-existent mergestate node
If the mergestate somehow contains a reference to a non-existent node,
it causes most commands to crash since
aaeccdb6e654 (repoview: pin
revisions for `local` and `other` when a merge is active,
2020-09-04). This patch adds a test showing that.
Differential Revision: https://phab.mercurial-scm.org/D9077
# narrowrepo.py - repository which supports narrow revlogs, lazy loading
#
# Copyright 2017 Google, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
from mercurial import wireprototypes
from . import narrowdirstate
def wraprepo(repo):
"""Enables narrow clone functionality on a single local repository."""
class narrowrepository(repo.__class__):
def _makedirstate(self):
dirstate = super(narrowrepository, self)._makedirstate()
return narrowdirstate.wrapdirstate(self, dirstate)
def peer(self):
peer = super(narrowrepository, self).peer()
peer._caps.add(wireprototypes.NARROWCAP)
peer._caps.add(wireprototypes.ELLIPSESCAP)
return peer
repo.__class__ = narrowrepository