[Bug 941672] Re: "bzr help branches" crashes with bzr: ERROR: exceptions.AttributeError: 'Option' object has no attribute 'get_help_topic'

[Colin D Bennett]

P.S. This 'bzr tags' crash is completely different from the 'bzr help
branches' crash, except that perhaps Bazaar could more gracefully catch
issues in the plugins help system, and tell the user that "plugin X is
missing help for topic Y".

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Title:
  "bzr help branches" crashes with bzr: ERROR:
  exceptions.AttributeError: 'Option' object has no attribute
  'get_help_topic'

Status in Bazaar Version Control System:
  Fix Released
Status in Bazaar 2.5 series:
  Fix Released
Status in “bzr” package in Ubuntu:
  Fix Released
Status in “bzr” source package in Precise:
  Fix Committed

Bug description:
  Had this happen while trying to figure out co-located branches.
  Completely repeatable. 2.5.0 was installed over 2.4.1 (I think).

  $ bzr help branches
  bzr: ERROR: exceptions.AttributeError: 'Option' object has no attribute 'get_help_topic'

  Traceback (most recent call last):
    File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 920, in exception_to_return_code
      return the_callable(*args, **kwargs)
    File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 1131, in run_bzr
      ret = run(*run_argv)
    File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 673, in run_argv_aliases
      return self.run(**all_cmd_args)
    File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 695, in run
      return self._operation.run_simple(*args, **kwargs)
    File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 136, in run_simple
      self.cleanups, self.func, *args, **kwargs)
    File "/Library/Python/2.6/site-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
      result = func(*args, **kwargs)
    File "/Library/Python/2.6/site-packages/bzrlib/commands.py", line 1148, in ignore_pipe
      result = func(*args, **kwargs)
    File "/Library/Python/2.6/site-packages/bzrlib/builtins.py", line 4815, in run
      bzrlib.help.help(topic)
    File "/Library/Python/2.6/site-packages/bzrlib/help.py", line 51, in help
      topic_obj.get_help_topic()))
  AttributeError: 'Option' object has no attribute 'get_help_topic'

  bzr 2.5.0 on python 2.6.1 (Darwin-10.8.0-i386-64bit)
  arguments: ['/usr/local/bin/bzr', 'help', 'branches']
  plugins: bash_completion[2.5.0], bzrtools[2.5.0], changelog_merge[2.5.0],
      colo[0.4.0], email[unknown], explorer[1.2.2], extmerge[unknown],
      fastimport[0.13.0dev], git[0.6.7], keychain[0.1.0], launchpad[2.5.0],
      loom[2.2.1dev], netrc_credential_store[2.5.0], news_merge[2.5.0],
      pipeline[1.4.0], po_merge[2.5.0], qbzr[0.22.1], rewrite[0.6.3dev],
      svn[1.1.2], upload[1.0.1dev], weave_fmt[2.5.0], xmloutput[0.8.8]
  encoding: 'utf-8', fsenc: 'utf-8', lang: 'en_US.UTF-8'

  *** 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.

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