Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 487, in _inline_callbacks
    result.traceback)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/gtk3widgets.py", line 674, in _run
    yield self._transaction.run()
TransactionFailed: <unprintable TransactionFailed object>