Reproducible internal error: PathNotChild

[David]

david@cookies:~/BZR$ bzr init one
david@cookies:~/BZR$ bzr init two
david@cookies:~/BZR$ touch one/foo two/foo
david@cookies:~/BZR$ bzr add */*
added foo
bzr: ERROR: bzrlib.errors.PathNotChild: Path "/home/david/BZR/two/foo" is not a child of path "/home/david/BZR/one"

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 834, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 790, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 384, in run
    no_recurse, action=action, save=not dry_run)
  File "/usr/lib/python2.5/site-packages/bzrlib/mutabletree.py", line 51, in tree_write_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/mutabletree.py", line 294, in smart_add
    rf = _FastPath(self.relpath(filepath))
  File "/usr/lib/python2.5/site-packages/bzrlib/workingtree.py", line 481, in relpath
    return osutils.relpath(self.basedir, path)
  File "/usr/lib/python2.5/site-packages/bzrlib/osutils.py", line 914, in relpath
    raise errors.PathNotChild(rp, base)
PathNotChild: Path "/home/david/BZR/two/foo" is not a child of path "/home/david/BZR/one"

bzr 1.3.1 on python 2.5.2.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'add', 'one/foo', 'two/foo']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_GB.UTF-8'
plugins:
  bzrtools /usr/lib/python2.5/site-packages/bzrlib/plugins/bzrtools [1.3.0]
  launchpad /usr/lib/python2.5/site-packages/bzrlib/plugins/launchpad [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.