Fix editorials for contests with less than 4 problems

diff --git a/lib/Plack/App/Gruntmaster/HTML.pm b/lib/Plack/App/Gruntmaster/HTML.pm
index 947f039238b0fb20ba4a638ae25dbad03609ddd0..eb3c56765964e4d1ec09fb70d14b7865c64b3738 100644 (file)
--- a/lib/Plack/App/Gruntmaster/HTML.pm
+++ b/lib/Plack/App/Gruntmaster/HTML.pm
@@ -284,6 +284,6 @@ sub process_ed {
                $div->set_child_content(class => 'solution', literal $data->{solution});
                $div->fclass('problem')->namedlink($data->{id}, $data->{name});
        };
-       my @pb = map { @{$args{$_}} } qw/beginner easy medium hard/;
+       my @pb = map { @{$args{$_} // []} } qw/beginner easy medium hard/;
        $tree->fclass('well')->iter3(\@pb, $iter);
 }