$ perl -e'use Carp 100 ()' Carp version 100 required--this is only version 1.26 at -e line 1. BEGIN failed--compilation aborted at -e line 1. $ perl -e'use Carp () => 100' Carp version 100 required--this is only version 1.26 at /home/tai/perl5/perlbrew/perls/perl-5.16.2/lib/5.16.2/Exporter/Heavy.pm line 120. BEGIN failed--compilation aborted at -e line 1.