bzr: ERROR: exceptions.AssertionError: Root entry should be supplied to record_entry_contents, as of bzr 0.10

[Steve]

Run command: bzr commit -m "first test with a test file test.m" --exclude "C:/Documents and Settings/hauck/My Documents/Research/Mercury/inte...
Committing to: C:/Documents and Settings/hauck/My Documents/Research/Mercury/internal_structure/code/trunk/
aborting commit write group: AssertionError('Root entry should be supplied to record_entry_contents, as of bzr 0.10.',)
bzr: ERROR: exceptions.AssertionError: Root entry should be supplied to record_entry_contents, as of bzr 0.10.

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 912, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1112, in run_bzr
  File "bzrlib\commands.pyo", line 690, in run_argv_aliases
  File "bzrlib\commands.pyo", line 705, in run
  File "bzrlib\cleanup.pyo", line 135, in run_simple
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\commands.py", line 767, in run
  File "C:/Program Files/Bazaar/plugins\qbzr\lib\subprocess.py", line 888, in run_subprocess_command
  File "bzrlib\commands.pyo", line 1112, in run_bzr
  File "bzrlib\commands.pyo", line 690, in run_argv_aliases
  File "bzrlib\commands.pyo", line 705, in run
  File "bzrlib\cleanup.pyo", line 135, in run_simple
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "bzrlib\builtins.pyo", line 3200, in run
  File "bzrlib\decorators.pyo", line 194, in write_locked
  File "bzrlib\workingtree_4.pyo", line 197, in commit
  File "bzrlib\decorators.pyo", line 194, in write_locked
  File "bzrlib\mutabletree.pyo", line 201, in commit
  File "bzrlib\commit.pyo", line 286, in commit
  File "bzrlib\cleanup.pyo", line 131, in run
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "bzrlib\commit.pyo", line 423, in _commit
  File "bzrlib\repository.pyo", line 232, in finish_inventory
AssertionError: Root entry should be supplied to record_entry_contents, as of bzr 0.10.

bzr 2.2.1 on python 2.6.4 (Windows-XP-5.1.2600-SP3)
arguments: ['C:\\Program Files\\Bazaar\\bzr.exe', 'qsubprocess', '--bencode', 'l6:commit2:-m34:first test with a test file test.m9:--exclude91:C:/Documents and Settings/hauck/My Documents/Research/Mercury/internal_structure/code/trunk11:--unchangede']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.2.0]
  colo C:\Program Files\Bazaar\plugins\colo [0.1.0]
  explorer C:\Program Files\Bazaar\plugins\explorer [1.1.1]
  fastimport C:\Program Files\Bazaar\plugins\fastimport [0.9.0dev]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.2.1]
  loom C:\Program Files\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store C:\Program Files\Bazaar\plugins\netrc_credential_store [2.2.1]
  news_merge C:\Program Files\Bazaar\plugins\news_merge [2.2.1]
  pipeline C:\Program Files\Bazaar\plugins\pipeline [unknown]
  qbzr C:\Program Files\Bazaar\plugins\qbzr [0.19.2]
  rewrite C:\Program Files\Bazaar\plugins\rewrite [0.6.1]
  svn C:\Program Files\Bazaar\plugins\svn [1.0.4]
  upload C:\Program Files\Bazaar\plugins\upload [1.0.0dev]
  xmloutput C:\Program Files\Bazaar\plugins\xmloutput [0.8.6]

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.

[Vincent Ladeuil (vila)]

This is an edge case but bzr shouldn't issue a traceback.

An error message mentioning that you can't commit while excluding everything under the root directory of the branch you're trying to commit to will be nicer.