KeyError exception on 'bzr version'

[Piotr Kalinowski]

When running 'bzr version' with bzr-git installed (I just pulled the trunk), I get the following:

Bazaar (bzr) 2.6.0
bzr: ERROR: exceptions.KeyError: 'cf1211dfac85ec342a8c5a24cd796d6e5720a289'

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/bzrlib/commands.py", line 930, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/commands.py", line 1121, in run_bzr
    ret = run(*run_argv)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/commands.py", line 697, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/cleanup.py", line 136, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/commands.py", line 1138, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/builtins.py", line 4226, in run
    show_version(to_file=self.outf)
  File "/usr/local/lib/python2.7/site-packages/bzrlib/version.py", line 40, in show_version
    src_tree = _get_bzr_source_tree()
  File "/usr/local/lib/python2.7/site-packages/bzrlib/version.py", line 104, in _get_bzr_source_tree
    return control.open_workingtree(recommend_upgrade=False)
  File "/Users/pitkali/.bazaar/plugins/git/dir.py", line 449, in open_workingtree
    return GitWorkingTree(self, repo, branch, index)
  File "/Users/pitkali/.bazaar/plugins/git/workingtree.py", line 97, in __init__
    self._reset_data()
  File "/Users/pitkali/.bazaar/plugins/git/workingtree.py", line 549, in _reset_data
    self.store.__getitem__, self.store[head].tree)
  File "/Library/Python/2.7/site-packages/dulwich/object_store.py", line 115, in __getitem__
    type_num, uncomp = self.get_raw(sha)
  File "/Library/Python/2.7/site-packages/dulwich/object_store.py", line 384, in get_raw
    raise KeyError(hexsha)
KeyError: 'cf1211dfac85ec342a8c5a24cd796d6e5720a289'

bzr 2.6.0 on python 2.7.5 (Darwin-13.0.0-x86_64-i386-64bit)
arguments: ['/usr/local/bin/bzr', 'version']
plugins: bash_completion[2.6.0], builder[0.7.4dev], bzrtools[2.5.0],
    changelog_merge[2.6.0], colo[0.4.0], email[unknown], explorer[1.3.1dev],
    externals[1.3.4dev2], fastimport[0.14.0dev], git[0.6.12], grep[2.6.0],
    keychain[0.1.0], launchpad[2.6.0], loom[2.3.0dev],
    netrc_credential_store[2.6.0], news_merge[2.6.0], pipeline[1.4.0],
    po_merge[2.6.0], qbzr[0.23.1], rewrite[0.6.4dev], scmproj[0.6.3dev],
    upload[1.2.0dev], weave_fmt[2.6.0], xmloutput[0.8.9]
encoding: 'utf-8', fsenc: 'utf-8', lang: None

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.

This happens:
* When running version command, not other commands.
* When running both outside any repository, and inside normal bazaar repository, or git repository.

Note that the value of the KeyError seems not to change.

[Piotr Kalinowski (pitkali)]

This seems to reproduce only with bzr 2.6.0 installed from homebrew. I cannot reproduce this using manually compiled 2.7 trunk, so I guess it's an issue with some homebrew patch. This would render the bug here invalid, I guess.