$ echo 'package Foo; use strict; use warnings; warn "foo!"; 1;' | perlcritic -3 "warn" used instead of "carp" at line 1, column 40. See page 283 of PBP. (Severity: 3) $ echo 'package Foo; use strict; use warnings; warn "foo!\n"; 1;' | perlcritic -3 source OK $