crash while converting a csv-module to mercurial via hg convert

[Stefan Rücker]

Dear Sir or Madam,

i was trying to convert a cvs module called vera into a mercurial repository, 
since I've no experiences with mercurial I tried the simplest conversion just 
to see the result of that. The command I used:

# stefan at neptun:~/myfiles/dev/checkout$ hg convert vera/

An infomation that might be helpful:
KeyError: 'vera_013' where vera_013 is a branch name.

conversion.log.zip contains the whole conversion info.

repository.targ.gz is a very small extract from the original cvs-module you 
should be able to reproduce the error with that repository. If you need more 
information don't hesitate to contact me.

Yours sincerly
Stefan Rücker

The Trace:
--------------
initializing destination 2 repository
** unknown exception encountered, details follow
** report bug details to http://www.selenic.com/mercurial/bts
** or mercurial at selenic.com
** Mercurial Distributed SCM (version 1.0.1)
Traceback (most recent call last):
  File "/usr/bin/hg", line 20, in <module>
    mercurial.dispatch.run()
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 20, in 
run
    sys.exit(dispatch(sys.argv[1:]))
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 29, in 
dispatch
    return _runcatch(u, args)
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 45, in 
_runcatch
    return _dispatch(ui, args)
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 364, in 
_dispatch
    ret = _runcommand(ui, options, cmd, d)
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 417, in 
_runcommand
    return checkargs()
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 373, in 
checkargs
    return cmdfunc()
  File "/var/lib/python-support/python2.5/mercurial/dispatch.py", line 358, in 
<lambda>
    d = lambda: func(ui, *args, **cmdoptions)
  File "/var/lib/python-support/python2.5/hgext/convert/__init__.py", line 
127, in convert
    return convcmd.convert(ui, src, dest, revmapfile, **opts)
  File "/var/lib/python-support/python2.5/hgext/convert/convcmd.py", line 335, 
in convert
    opts.get('rev'))
  File "/var/lib/python-support/python2.5/hgext/convert/convcmd.py", line 50, 
in convertsource
    return source(ui, path, rev)
  File "/var/lib/python-support/python2.5/hgext/convert/cvs.py", line 31, in 
__init__
    self._parse()
  File "/var/lib/python-support/python2.5/hgext/convert/cvs.py", line 76, in 
_parse
    self.parent[id] = self.lastbranch[ancestor]
KeyError: 'vera_013'
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