Description of problem:
Update system
Run dnf needs-restarting

Version-Release number of selected component:
dnf-1.1.1-2.fc22

Additional info:
reporter:       libreport-2.6.2
cmdline:        /usr/bin/python -OO /usr/bin/dnf needs-restarting
executable:     /usr/bin/dnf
kernel:         4.1.6-201.fc22.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
needs_restarting.py:101:print_cmd:UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 108: ordinal not in range(128)

Traceback (most recent call last):
  File "/usr/bin/dnf", line 36, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 198, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 84, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 136, in _main
    cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1085, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/needs_restarting.py", line 207, in run
    print_cmd(pid)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/needs_restarting.py", line 101, in print_cmd
    command = ' '.join(command.split('\000'))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 108: ordinal not in range(128)

Local variables in innermost frame:
cmdline: u'/proc/1564/cmdline'
pid: 1564
command: '/usr/lib64/xfce4/panel/wrapper-1.0\x00/usr/lib64/xfce4/panel/plugins/libactions.so\x002\x0018874400\x00actions\x00Aktionskn\xc3\xb6pfe\x00Abmelden, sperren oder andere Systemaktionen\x00\x00'
cmdline_file: <closed file u'/proc/1564/cmdline', mode 'r' at 0x7fa16788cc90>