Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 472, in _inline_callbacks
    result = gen.throw(result.type, result.value, result.traceback)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/gtkwidgets.py", line 633, in _run
    yield self._transaction.run()
DBusException: org.freedesktop.DBus.Python.UnicodeDecodeError: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/defer/__init__.py", line 474, in _inline_callbacks
    result = gen.send(result)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 799, in _run
    self.queue.put(self.tid)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 1166, in put
    self.worker.simulate(trans, self.future_status)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 965, in simulate
    trans.error = excep
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 459, in _set_error
    self._error_property = self._convert_struct((excep.code, msg), "ss")
  File "/usr/lib/python2.7/dist-packages/aptdaemon/core.py", line 396, in _convert_struct
    struct.append(dbus.String(item))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 100: ordinal not in range(128)