bzr crashes when shelving new dir

[Sondra Kinsey]

bzr crashed when shelving certain changes. I suspect (though don't really know) that it has something to do with adding a directory and then immediately shelving it (without committing). Is bzr removing the parent directory before removing its children?
I am running bzr out-of-the-box from Ubuntu. bzr check revealed no problems.
I can workaround this, but I'm bummed to know bzr isn't as mature and stable as I thought.

$ bzr shelve --all comp-info/ -m comp-info
Selected changes:
+N comp-info/unknown-1/Ethan-Thinkpad.txt
R comp-info/monitor-4/2014-09-29/ => comp-info/unknown-1/
 M comp-info/monitor-4/misc.txt
-D comp-info/sims-PS-LAB29/
-D comp-info/sims-PS-LAB29/boottimes
-D comp-info/sims-PS-LAB29/disks-status.txt
-D comp-info/sims-PS-LAB29/misc.txt
-D comp-info/sims-PS-LAB29/modules.list
-D comp-info/sims-PS-LAB29/storage-devices.txt
 M comp-info/sims-HRHA-5-PC/misc.txt
 M comp-info/sims-PS-LAB03/misc.txt
-D comp-info/sims-PS-LAB06/
-D comp-info/sims-PS-LAB06/misc.txt
bzr: ERROR: bzrlib.errors.MalformedTransform: Tree transform is malformed [('missing parent', 'new-1')]

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 1121, 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/builtins.py", line 6567, in run
    shelver.run()
  File "/usr/lib/python2.7/dist-packages/bzrlib/shelf_ui.py", line 218, in run
    self.message)
  File "/usr/lib/python2.7/dist-packages/bzrlib/shelf.py", line 396, in shelve_changes
    creator.transform()
  File "/usr/lib/python2.7/dist-packages/bzrlib/shelf.py", line 261, in transform
    self.work_transform.apply()
  File "/usr/lib/python2.7/dist-packages/bzrlib/transform.py", line 1719, in apply
    self._check_malformed()
  File "/usr/lib/python2.7/dist-packages/bzrlib/transform.py", line 555, in _check_malformed
    raise MalformedTransform(conflicts=conflicts)
MalformedTransform: Tree transform is malformed [('missing parent', 'new-1')]

bzr 2.7.0dev1 on python 2.7.6 (Linux-3.13.0-32-generic-i686-with-
    Ubuntu-14.04-trusty)
arguments: ['/usr/bin/bzr', 'shelve', '--all', 'comp-info/', 'comp-info']
plugins: bash_completion[2.7.0dev1], changelog_merge[2.7.0dev1],
    grep[2.7.0dev1], launchpad[2.7.0dev1], netrc_credential_store[2.7.0dev1],
    news_merge[2.7.0dev1], po_merge[2.7.0dev1], weave_fmt[2.7.0dev1]
encoding: 'utf-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'

*** 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.