I've been fiddling with multi-line comments and the bounding characters. Naturally-paired characters e.g. #`(...) #`[...] #`{...} all work well, but with other boundary characters like #`@....@ or #`!....! produce odd, displaced, diagnostic messages. Reproducing them is so easy, I'll leave it as "an exercise for the reader".
If unpaired boundary characters like these are legal, presumably there's a problem with the parser or compiler? If they aren't, maybe a) the docs should be more explicit, and b), the diagnostics should say so, immediately? perl6 -v This is Rakudo Star version 2019.03.1 built on MoarVM version 2019.03