my $match_cb = $lei->complete_url_prepare(\@argv);
# filter-out read-only sources:
my @k = grep(!m!(?://;AUTH=ANONYMOUS\@|\A(?:nntps?|s?news)://)!,
- $lms->folders($argv[-1], 1));
+ $lms->folders($argv[-1] // undef, 1));
my @m = map { $match_cb->($_) } @k;
@m ? @m : @k;
}