ebergen@alien:~/bzr/tivo$ bzr merge -rtag:mariadb-5.2.12 lp:maria/5.2
bzr: ERROR: bzrlib.errors.BzrCheckError: Internal check failed: Cannot add revision(s) to repository: missing referenced chk root keys: [StaticTuple('sha1:249958ece6ec16d8626011b5cf5eaf5428a341a1',)]

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 930, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1141, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 697, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 4442, in run
    location, revision, remember, possible_transports, None)
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 4588, in _get_merger_from_branch
    other_revision_id, base_revision_id, other_branch, base_branch)
  File "/usr/lib/python2.7/dist-packages/bzrlib/merge.py", line 423, in from_revision_ids
    merger.set_other_revision(other, other_branch)
  File "/usr/lib/python2.7/dist-packages/bzrlib/merge.py", line 517, in set_other_revision
    self._maybe_fetch(other_branch, self.this_branch, self.other_rev_id)
  File "/usr/lib/python2.7/dist-packages/bzrlib/merge.py", line 534, in _maybe_fetch
    target.fetch(source, revision_id)
  File "/usr/lib/python2.7/dist-packages/bzrlib/decorators.py", line 218, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/branch.py", line 698, in fetch
    return InterBranch.get(from_branch, self).fetch(last_revision, limit=limit)
  File "/usr/lib/python2.7/dist-packages/bzrlib/decorators.py", line 218, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/branch.py", line 3169, in fetch
    fetch_spec=fetch_spec)
  File "/usr/lib/python2.7/dist-packages/bzrlib/vf_repository.py", line 1268, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/usr/lib/python2.7/dist-packages/bzrlib/decorators.py", line 218, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/vf_repository.py", line 2585, in fetch
    find_ghosts=find_ghosts)
  File "/usr/lib/python2.7/dist-packages/bzrlib/fetch.py", line 77, in __init__
    self.__fetch()
  File "/usr/lib/python2.7/dist-packages/bzrlib/fetch.py", line 104, in __fetch
    self._fetch_everything_for_search(search_result)
  File "/usr/lib/python2.7/dist-packages/bzrlib/fetch.py", line 132, in _fetch_everything_for_search
    stream, from_format, [])
  File "/usr/lib/python2.7/dist-packages/bzrlib/vf_repository.py", line 2051, in insert_stream
    hint = self.target_repo.commit_write_group()
  File "/usr/lib/python2.7/dist-packages/bzrlib/repository.py", line 633, in commit_write_group
    result = self._commit_write_group()
  File "/usr/lib/python2.7/dist-packages/bzrlib/repofmt/pack_repo.py", line 1727, in _commit_write_group
    hint = self._pack_collection._commit_write_group()
  File "/usr/lib/python2.7/dist-packages/bzrlib/repofmt/pack_repo.py", line 1607, 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('sha1:249958ece6ec16d8626011b5cf5eaf5428a341a1',)]

You can report this problem to Bazaar's developers by running
    apport-bug /var/crash/bzr.1000.2012-09-22T04:17.crash
if a bug-reporting window does not automatically appear.
ebergen@alien:~/bzr/tivo$