newer versions break bzr-loom

[Jelmer Vernooij]

newer versions of bzr (between 2.4beta3 and beta4?) break bzr-loom:

ERROR: bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom
    Text attachment: log
------------
3.442 creating repository in file:///tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work/.bzr/.
3.444 creating branch <bzrlib.branch.BzrBranchFormat7 object at 0x28b7350> in file:///tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work/
3.450 trying to create missing lock '/tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work/.bzr/checkout/dirstate'
3.450 opening working tree '/tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work'
3.456 opening working tree '/tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work'
3.459 opening working tree '/tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work'
3.465 preparing to commit
    INFO Committing to: /tmp/testbzr-aNyJ_P.tmp/bzrlib.plugins.loom.tests.test_branch.TestLoom.test_revert_loom_remove_current_thread_mid_loom/work/
3.468 Selecting files for commit with filter None
    INFO Committed revision 1.
3.476 Committed revid <email address hidden> as revno 1.
    INFO All changes applied successfully.
3.511 opening working tree '/tmp/testbzr-aNyJ_P.tmp'
------------
Text attachment: traceback
------------
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/testtools/runtest.py", line 169, in _run_user
    return fn(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/testtools/testcase.py", line 563, in _run_test_method
    return self._get_test_method()()
  File "/home/jelmer/src/bzr-loom/trunk/tests/test_branch.py", line 550, in test_revert_loom_remove_current_thread_mid_loom
    tree.down_thread()
  File "/home/jelmer/src/bzr/foreign/bzrlib/decorators.py", line 217, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/home/jelmer/src/bzr-loom/trunk/tree.py", line 216, in down_thread
    self.tree.set_parent_trees(parent_list)
  File "/home/jelmer/src/bzr/foreign/bzrlib/mutabletree.py", line 51, in tree_write_locked
    return unbound(self, *args, **kwargs)

  File "/home/jelmer/src/bzr/foreign/bzrlib/workingtree_4.py", line 1170, in set_parent_trees
    dirstate.set_parent_trees(real_trees, ghosts=ghosts)
  File "/home/jelmer/src/bzr/foreign/bzrlib/dirstate.py", line 2752, in set_parent_trees
    self._entries_to_current_state(new_entries)
  File "/home/jelmer/src/bzr/foreign/bzrlib/dirstate.py", line 1143, in _entries_to_current_state
    if new_entries[0][0][0:2] != ('', ''):
IndexError: list index out of range
------------