Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 885, in simulate
    return self._simulate_helper(trans, status_path)
  File "/usr/lib/python2.7/dist-packages/aptdaemon/worker.py", line 997, in _simulate_helper
    trans.packages[PKGS_INSTALL] = [deb.pkgname]
TypeError: 'dbus.Struct' object does not support item assignment