Version-Release number of selected component:
yumex-dnf-4.1.2-1.fc21

Additional info:
reporter:       libreport-2.3.0
cmdline:        /usr/bin/python3 -tt /usr/bin/yumex-dnf
executable:     /usr/bin/yumex-dnf
kernel:         3.19.7-200.fc21.i686
type:           Python3
uid:            500

Truncated backtrace:
status.py:134:handle_dbus_signals:AttributeError: 'NoneType' object has no attribute 'check_for_updates'

Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 71, in __call__
    return getattr(self.proxy, self.method)(*args)
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 120, in _on_g_signal
    self.handle_dbus_signals(proxy, sender, signal, args)
  File "/usr/lib/python3.4/site-packages/yumex/status.py", line 134, in handle_dbus_signals
    self.app.win.check_for_updates()
AttributeError: 'NoneType' object has no attribute 'check_for_updates'

Local variables in innermost frame:
proxy: <DBusProxy object at 0xb5a54c34 (GDBusProxy at 0x9888ec0)>
args: ()
sender: ':1.203'
self: <yumex.status.StatusIcon object at 0xb5a55dcc>
signal: 'CheckUpdateSignal'