Version-Release number of selected component:
yumex-dnf-4.1.4-1.fc23

Additional info:
reporter:       libreport-2.6.3
cmdline:        /usr/bin/python3 -tt /usr/bin/yumex-dnf
executable:     /usr/bin/yumex-dnf
kernel:         4.2.5-300.fc23.x86_64+debug
runlevel:       N 5
type:           Python3
uid:            1000

Truncated backtrace:
__init__.py:1015:_populate_transaction:UnboundLocalError: local variable 'pkg' referenced before assignment

Traceback (most recent call last):
  File "/usr/lib/python3.4/site-packages/yumex/__init__.py", line 957, in on_apply_changes
    self.process_actions()
  File "/usr/lib/python3.4/site-packages/yumex/misc.py", line 145, in newFunc
    rc = func(*args, **kwargs)
  File "/usr/lib/python3.4/site-packages/yumex/__init__.py", line 1114, in process_actions
    result = self._build_from_queue()
  File "/usr/lib/python3.4/site-packages/yumex/__init__.py", line 1042, in _build_from_queue
    self._populate_transaction()
  File "/usr/lib/python3.4/site-packages/yumex/__init__.py", line 1015, in _populate_transaction
    logger.debug('%s: %s' % (rc, pkg))
UnboundLocalError: local variable 'pkg' referenced before assignment

Local variables in innermost frame:
grp_id: 'xfce-desktop'
rc: False
action: 'r'
error_msgs: set()
pkgs: []
errors: 0
trans: ['package lxde-common-0.99.0-1.fc23.noarch requires desktop-backgrounds-compat, but none of the providers can be installed']
self: <YumexWindow object at 0x7f4761cfbf78 (yumex+YumexWindow at 0x55b6d1cac290)>