This file is indexed.

/usr/share/perl/5.24.1/parent.pm is in perl-modules-5.24 5.24.1-3+deb9u5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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package parent;
use strict;
use vars qw($VERSION);
$VERSION = '0.234';

sub import {
    my $class = shift;

    my $inheritor = caller(0);

    if ( @_ and $_[0] eq '-norequire' ) {
        shift @_;
    } else {
        for ( my @filename = @_ ) {
            s{::|'}{/}g;
            require "$_.pm"; # dies if the file is not found
        }
    }

    {
        no strict 'refs';
        push @{"$inheritor\::ISA"}, @_;
    };
};

"All your base are belong to us"

__END__