Pour bazaar c'était bien un bug :
Wed 2012-07-18 10:53:50 +0200
0.059 bazaar version: 2.6b2
0.059 bzr arguments: [u'log', u'livewallpaper.cpp']
0.063 looking for plugins in /home/ubuntu/.bazaar/plugins
0.064 looking for plugins in /usr/lib/python2.7/dist-packages/bzrlib/plugins
0.082 encoding stdout as osutils.get_user_encoding() 'utf-8'
0.110 opening working tree '/home/ubuntu/dev/livewallpapers/trunk'
0.121 Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 930, in exception_to_return_code
return the_callable(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1141, in run_bzr
ret = run(*run_argv)
File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 673, in run_argv_aliases
return self.run(**all_cmd_args)
File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 697, in run
return self._operation.run_simple(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 136, in run_simple
self.cleanups, self.func, *args, **kwargs)
File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 166, in _do_with_cleanups
result = func(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1158, in ignore_pipe
result = func(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 2796, in run
revision, file_list, self.add_cleanup)
File "/usr/lib/python2.7/dist-packages/bzrlib/log.py", line 2030, in _get_info_for_log_files
relpaths = [path] + tree.safe_relpath_files(file_list[1:])
File "/usr/lib/python2.7/dist-packages/bzrlib/workingtree.py", line 349, in safe_relpath_files
view_files = self.views.lookup_view()
File "/usr/lib/python2.7/dist-packages/bzrlib/views.py", line 113, in lookup_view
self._load_view_info()
File "/usr/lib/python2.7/dist-packages/bzrlib/views.py", line 179, in _load_view_info
self.tree.lock_read()
File "/usr/lib/python2.7/dist-packages/bzrlib/workingtree_4.py", line 609, in lock_read
state.lock_read()
File "/usr/lib/python2.7/dist-packages/bzrlib/dirstate.py", line 3319, in lock_read
self._lock_token = lock.ReadLock(self._filename)
File "/usr/lib/python2.7/dist-packages/bzrlib/lock.py", line 257, in __init__
raise errors.LockContention(self.filename, e)
LockContention: Could not acquire lock "/home/ubuntu/dev/livewallpapers/trunk/.bzr/checkout/dirstate": [Errno 11] Resource temporarily unavailable