package My;
use warnings;
use strict;

our $counter //= 10;
++$counter

##</code><code>##

#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };
use lib './';

say require My;         # 11
say require 'My.pm';    # In %INC, returns 1.
say require './My.pm';  # Not in %INC, thus 12!