bzr crashed with BzrCheckError in _commit_write_group()

Binary package hint: bzr

This happened during a pull.

ProblemType: Crash
DistroRelease: Ubuntu 10.10
Package: bzr 2.2.1-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
Architecture: i386
BzrDebugFlags: set()
BzrVersion: 2.2.1
CommandLine: ['/usr/bin/bzr', 'pull']
CrashDb: bzr
Date: Thu Nov 18 13:53:16 2010
ExecutablePath: /usr/bin/bzr
FileSystemEncoding: UTF-8
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
InterpreterPath: /usr/bin/python2.6
Locale: nl_NL.utf8
Platform: Linux-2.6.35-22-generic-i686-with-Ubuntu-10.10-maverick
ProcCmdline: /usr/bin/python /usr/bin/bzr pull
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LC_COLLATE=C
 LANG=nl_NL.utf8
 LANGUAGE=en
PythonVersion: 2.6.6
SourcePackage: bzr
Title: bzr crashed with BzrCheckError in _commit_write_group()
UserEncoding: UTF-8
UserGroups: adm admin audio cdrom dialout dip fax floppy fuse libvirtd lpadmin netdev plugdev sambashare tape vboxusers video

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 912, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 1112, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 690, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 705, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 1040, in run
    possible_transports=possible_transports, local=local)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/workingtree.py", line 1622, in pull
    local=local)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 1068, in pull
    possible_transports=possible_transports, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 3416, in pull
    _override_hook_target=_override_hook_target)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 3525, in _pull
    overwrite=overwrite, graph=graph)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 1017, in update_revisions
    overwrite, graph)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 3370, in update_revisions
    self.target.fetch(self.source, stop_revision)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/branch.py", line 673, in fetch
    pb=pb)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 1740, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/usr/lib/python2.6/dist-packages/bzrlib/decorators.py", line 194, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 3448, in fetch
    find_ghosts=find_ghosts)
  File "/usr/lib/python2.6/dist-packages/bzrlib/fetch.py", line 73, in __init__
    self.__fetch()
  File "/usr/lib/python2.6/dist-packages/bzrlib/fetch.py", line 99, in __fetch
    self._fetch_everything_for_search(search)
  File "/usr/lib/python2.6/dist-packages/bzrlib/fetch.py", line 127, in _fetch_everything_for_search
    stream, from_format, [])
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 4287, in insert_stream
    is_resume)
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 4387, in _locked_insert_stream
    hint = self.target_repo.commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repository.py", line 1599, in commit_write_group
    result = self._commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 2311, in _commit_write_group
    hint = self._pack_collection._commit_write_group()
  File "/usr/lib/python2.6/dist-packages/bzrlib/repofmt/pack_repo.py", line 2149, in _commit_write_group
    "Cannot add revision(s) to repository: " + problems_summary)
BzrCheckError: Internal check failed: Cannot add revision(s) to repository: missing referenced chk root keys: [StaticTuple('sha1:e01eb19f137985a7119224427379772771cf24da',)]