Traceback (most recent call last):
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/tests/blackbox/test_reconfigure.py", line 213, in test_reconfigure_stacking
    out, err = self.run_bzr('reconfigure --unstacked b2')
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/tests/__init__.py", line 1651, in run_bzr
    working_dir=working_dir,
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/tests/__init__.py", line 1565, in _run_bzr_autosplit
    encoding=encoding, stdin=stdin, working_dir=working_dir,
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/tests/__init__.py", line 1595, in _run_bzr_core
    args)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/tests/__init__.py", line 1885, in apply_redirected
    return a_callable(*args, **kwargs)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/commands.py", line 1131, in run_bzr_catch_user_errors
    return run_bzr(argv)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/commands.py", line 1030, in run_bzr
    ret = run(*run_argv)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/commands.py", line 647, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/builtins.py", line 5282, in run
    branch.set_stacked_on_url(None)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/branch.py", line 673, in set_stacked_on_url
    self._unstack()
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/branch.py", line 713, in _unstack
    find_ghosts=True)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/repository.py", line 1550, in fetch
    find_ghosts=find_ghosts, fetch_spec=fetch_spec)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/repository.py", line 3194, in fetch
    pb=pb, find_ghosts=find_ghosts)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/fetch.py", line 79, in __init__
    self.__fetch()
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/fetch.py", line 101, in __fetch
    search = self._revids_to_fetch()
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/fetch.py", line 170, in _revids_to_fetch
    find_ghosts=self.find_ghosts)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/repository.py", line 1383, in search_missing_revision_ids
    revision_id, find_ghosts)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/repository.py", line 3264, in search_missing_revision_ids
    source_ids = self.source.get_ancestry(revision_id)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/decorators.py", line 138, in read_locked
    result = unbound(self, *args, **kwargs)
  File "/home/mbp/bzr/391411-reconfigure-stacked/bzrlib/repository.py", line 2411, in get_ancestry
    raise errors.NoSuchRevision(self, revision_id)
NoSuchRevision: CHKInventoryRepository('file:///tmp/testbzr-cQCJzK.tmp/bzrlib.tests.blackbox.test_reconfigure.TestReconfigureStacking.test_reconfigure_stacking/work/b1/.bzr/repository/') has no revision mbp@grace-20090708084610-72x6yr1s8xdhetzj