Comment 1 for bug 1488296

The raw stacks:
(Pdb) sys.modules['traceback2'].print_tb(exc_info[1][0][2])
  File "/home/robertc/.virtualenvs/scratch/local/lib/python2.7/site-packages/fixtures/fixture.py", line 197, in setUp
    self._setUp()
  File "testrepository/testcommand.py", line 246, in _setUp
    self._instance = self._instance_source.obtain_instance(self._profile)
  File "testrepository/testcommand.py", line 845, in obtain_instance
    out = out.decode('utf-8')
  File "/home/robertc/.virtualenvs/scratch/lib/python2.7/encodings/utf_8.py", line 16, in decode
    return codecs.utf_8_decode(input, errors, True)
(Pdb) sys.modules['traceback2'].print_tb(exc_info[1][1][2])
  File "/home/robertc/.virtualenvs/scratch/local/lib/python2.7/site-packages/fixtures/fixture.py", line 208, in setUp
    raise SetupError(details)

Which suggests we're trimming too much inside of fixtures, perhaps.