$ cat foo.pl
use strict;
use warnings;

my ($unused, $i, $j);
$i = $j; # uninitialized
__END__
$ perlcritic -3 foo.pl
Code not contained in explicit package at line 1, column 1.  Violates encapsulation.  (Severity: 4)
Module does not end with "1;" at line 5, column 1.  Must end with a recognizable true value.  (Severity: 4)
$ perlcritic -Version
1.080
$