This ticket is about a failing test in S05-modifier/counted-match.t which calls .match with an infinite sequence as adverb :nth.
$ perl6-m -e 'my $data = "f fo foo fooo foooo fooooo foooooo"; my @match = $data.match(/fo+/, :nth(2, 4 ... *)).list; say @match.perl' [] The test expects @match to have three elements 'foo', 'foooo' and 'foooooo' there.