$ perl -c gibberish
Old package separator "'" deprecated at gibberish line 1.
gibberish syntax OK
It warns about the perl4 method access that ≠ hippies->chipper ≠ (npub1vlu…xzzu) notes, but is otherwise valid Perl.
$ perl gibberish
Old package separator "'" deprecated at gibberish line 1.
Can't locate object method "q" via package "hwev::ejvop" (perhaps you forgot to load "hwev::ejvop"?) at gibberish line 1.