Description:
seems like dfeet is no longer properly displaying the available object paths on start from application screen.
when start from console complete blows up.

[jatone@jambli die]$ d-feet
sys:1: PyGIWarning: Wnck was imported without specifying a version first. Use gi.require_version('Wnck', '3.0') before import to ensure that the right version gets loaded.
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/gi/overrides/Gio.py", line 143, in __async_result_handler
result_callback(obj, self._unpack_result(ret), real_user_data)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 297, in __list_names_handler
self.__add_names(names)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 289, in __add_names
self.__add_name(n, n)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 275, in __add_name
bus_name_box = BusNameBox(name, unique_name)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 20, in __init__
self.__icon_table = IconTable.get_instance()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 67, in get_instance
cls.instance = IconTable()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 27, in __init__
Wnck.Screen.force_update(screen)
TypeError: Argument 0 does not allow None as a value
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/gi/overrides/Gio.py", line 143, in __async_result_handler
result_callback(obj, self._unpack_result(ret), real_user_data)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 297, in __list_names_handler
self.__add_names(names)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 289, in __add_names
self.__add_name(n, n)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 275, in __add_name
bus_name_box = BusNameBox(name, unique_name)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 20, in __init__
self.__icon_table = IconTable.get_instance()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 67, in get_instance
cls.instance = IconTable()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 27, in __init__
Wnck.Screen.force_update(screen)
TypeError: Argument 0 does not allow None as a value
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/gi/overrides/Gio.py", line 143, in __async_result_handler
result_callback(obj, self._unpack_result(ret), real_user_data)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 279, in __get_name_owner_cb
self.__add_name(name, unique_name)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 275, in __add_name
bus_name_box = BusNameBox(name, unique_name)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 20, in __init__
self.__icon_table = IconTable.get_instance()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 67, in get_instance
cls.instance = IconTable()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 27, in __init__
Wnck.Screen.force_update(screen)
TypeError: Argument 0 does not allow None as a value
Traceback (most recent call last):
File "/usr/lib/python3.5/site-packages/gi/overrides/Gio.py", line 143, in __async_result_handler
result_callback(obj, self._unpack_result(ret), real_user_data)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 279, in __get_name_owner_cb
self.__add_name(name, unique_name)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 275, in __add_name
bus_name_box = BusNameBox(name, unique_name)
File "/usr/lib/python3.5/site-packages/dfeet/bus_watch.py", line 20, in __init__
self.__icon_table = IconTable.get_instance()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 67, in get_instance
cls.instance = IconTable()
File "/usr/lib/python3.5/site-packages/dfeet/wnck_utils.py", line 27, in __init__
Wnck.Screen.force_update(screen)


Additional info:
community/d-feet 0.3.10-2

Steps to reproduce:
start dfeet