bzr crashes on adding files with non-ascii characters

[Johannes Wiedersich]

bzr: ERROR: exceptions.UnicodeDecodeError: 'ascii' codec can't decode byte 0xe7 in position 8: ordinal not in range(128)

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 729, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 691, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.4/site-packages/bzrlib/commands.py", line 389, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.4/site-packages/bzrlib/builtins.py", line 376, in run
    no_recurse, action=action, save=not dry_run)
  File "/usr/lib/python2.4/site-packages/bzrlib/mutabletree.py", line 50, in tree_write_locked
    return unbound(self, *args, **kwargs)
  File "/usr/lib/python2.4/site-packages/bzrlib/mutabletree.py", line 420, in smart_add
    for subf in sorted(os.listdir(abspath)):
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe7 in position 8: ordinal not in range(128)

bzr 0.18.0 on python 2.4.4.final.0 (linux2)
arguments: ['/usr/bin/bzr', 'add']

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