^^^^[log from bzrlib.tests.workingtree_implementations.test_executable.TestExecutable.test_07_pull(WorkingTreeFormat4)]
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Traceback (most recent call last):
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/tests/workingtree_implementations/test_executable.py", line 140, in test_07_pull
    wt2 = self.commit_and_branch()
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/tests/workingtree_implementations/test_executable.py", line 74, in commit_and_branch
    dir2 = self.wt.branch.bzrdir.clone('b2', revision_id='r1')
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/bzrdir.py", line 168, in clone
    self.open_workingtree().clone(result, basis=basis_tree)
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/decorators.py", line 127, in read_locked
    return unbound(self, *args, **kwargs)
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/workingtree.py", line 557, in clone
    result = self._format.initialize(to_bzrdir)
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/workingtree_4.py", line 1128, in initialize
    wt._set_root_id(basis_root_id)
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/workingtree_4.py", line 954, in _set_root_id
    state.set_path_id('', file_id)
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/dirstate.py", line 1573, in set_path_id
    self._make_absent(entry)
  File "/home/mbp/bzr/Work/dirstate-plus-subtree/bzrlib/dirstate.py", line 1827, in _make_absent
    assert present, 'could not find entry for %s' % (current_old,)
AssertionError: could not find entry for (('', '', 'TREE_ROOT'), [('d', '', 0, False, 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'), ('a', '', 0, False, '')])