Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/ui/gtk3/widgets/oneconfviews.py", line 87, in on_cursor_changed
    hostid = model[path][self.COL_HOSTID]
  File "/usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py", line 1050, in __getitem__
    return self.model.get_value(self.iter, key)
  File "/usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py", line 977, in get_value
    return self._decode_value(treeiter, column, value)
  File "/usr/lib/python2.7/dist-packages/gi/overrides/Gtk.py", line 803, in _decode_value
    value = value.decode('UTF-8')
AttributeError: 'NoneType' object has no attribute 'decode'