dnf search BLAH
Traceback (most recent call last):
  File "/bin/dnf", line 35, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/yummain.py", line 316, in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/yummain.py", line 140, in main
    result, resultmsgs = base.doCommands()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 483, in doCommands
    return self.yum_cli_commands[self.basecmd].doCommand(self, self.basecmd, self.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/yumcommands.py", line 1254, in doCommand
    return base.search(extcmds)
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1217, in search
    for pkg in counter.sorted(reverse=True, limit_to=limit):
  File "/usr/lib/python2.7/site-packages/dnf/match_counter.py", line 81, in sorted
    return sorted(keys, key=self._key_func(), reverse=reverse)
  File "/usr/lib/python2.7/site-packages/dnf/match_counter.py", line 54, in _key_func
    max_length = self._max_needles()
  File "/usr/lib/python2.7/site-packages/dnf/match_counter.py", line 61, in _max_needles
    return max(map(lambda pkg: len(self.matched_needles(pkg)), self))
ValueError: max() arg is an empty sequence