Comment 2 for bug 1488296

(Pdb) sys.modules['traceback2'].print_tb(exc_info[2])
  File "/home/robertc/.virtualenvs/scratch/local/lib/python2.7/site-packages/testtools/testcase.py", line 666, in useFixture
    fixture.setUp()
  File "testrepository/testcommand.py", line 469, in setUp
    self.test_ids = self.list_tests(self._instance_source.default_profiles)
  File "testrepository/testcommand.py", line 519, in list_tests
    ids = self._list_tests(profile)
  File "testrepository/testcommand.py", line 531, in _list_tests
    self.ui, self._instance_source, self._parser, profile) as runner:
  File "/home/robertc/.virtualenvs/scratch/local/lib/python2.7/site-packages/fixtures/fixture.py", line 152, in __enter__
    self.setUp()
  File "/home/robertc/.virtualenvs/scratch/local/lib/python2.7/site-packages/fixtures/fixture.py", line 212, in setUp
    raise MultipleExceptions(*errors)

so we're missing the frame that called into the fixture at this step. But - its also raising M.E., so I need to dig more.