Comment 18 for bug 441125

In all cases it fails with this portion of traceback:
    ideal_index = repo._generate_text_key_index(None, ancestors)
  File "bzrlib/repository.py", line 2214, in _generate_text_key_index
    text_key_references, pb)
  File "bzrlib/repository.py", line 2233, in _do_generate_text_key_index
    revision_keys[text_key[1]].add(text_key)
KeyError: 'jameinel@falco-20100623213009-55b51a60hw58gtkd'

That revision-id matches the 'base' revision-id.

As such, I haven't reproduced exactly the same failure as seen by the simple script I wrote.