'ascii' codec can't decode byte 0xaa in position 0: ordinal not in range(128)

[stvo]

As a test i just tried to init my current home directory as with bzr,. which leads to to following error:

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

Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 716, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 911, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.6/dist-packages/bzrlib/commands.py", line 547, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.6/dist-packages/bzrlib/builtins.py", line 1564, in run
    possible_transports=[to_transport])
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 490, in create_branch_convenience
    bzrdir.create_workingtree()
  File "/usr/lib/python2.6/dist-packages/bzrlib/bzrdir.py", line 1481, in create_workingtree
    accelerator_tree=accelerator_tree, hardlink=hardlink)
  File "/usr/lib/python2.6/dist-packages/bzrlib/workingtree_4.py", line 1394, in initialize
    hardlink=hardlink, delta_from_tree=True)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transform.py", line 2034, in build_tree
    delta_from_tree)
  File "/usr/lib/python2.6/dist-packages/bzrlib/transform.py", line 2050, in _build_tree
    for dir, files in wt.walkdirs():
  File "/usr/lib/python2.6/dist-packages/bzrlib/workingtree.py", line 2372, in walkdirs
    current_disk = disk_iterator.next()
  File "/usr/lib/python2.6/dist-packages/bzrlib/osutils.py", line 1308, in walkdirs
    names = sorted(_listdir(top))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xaa in position 0: ordinal not in range(128)

bzr 1.13.1 on python 2.6.2 (linux2)
arguments: ['/usr/bin/bzr', 'init']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'de_DE.UTF-8'
plugins:
  bzrtools /usr/lib/python2.6/dist-packages/bzrlib/plugins/bzrtools [1.13]
  email /usr/lib/python2.6/dist-packages/bzrlib/plugins/email [unknown]
  launchpad /usr/lib/python2.6/dist-packages/bzrlib/plugins/launchpad [unknown]
  netrc_credential_store /usr/lib/python2.6/dist-packages/bzrlib/plugins/netrc_credential_store [unknown]
  search /usr/lib/python2.6/dist-packages/bzrlib/plugins/search [1.7dev]
  stats /usr/lib/python2.6/dist-packages/bzrlib/plugins/stats [unknown]
  upload /usr/lib/python2.6/dist-packages/bzrlib/plugins/upload [0.1]

[stvo (st-vogelsang)]

The Problem is related to old files originated from former dos backups. An example to create this error is attached in the test.tgz. I hope this helps to test and recreate the error.

[Vincent Ladeuil (vila)]

The file names are not in a valid encoding (at least one of them) so that needs to be fixed.
But bzr should give a better error message.
Thanks for attachment that reproduces the bug.