#!/usr/bin/perl

use strict;
use warnings;

use Module::CoreList;
use Data::Dumper;

print Dumper( $] );
 # Prints "5.010000" on my version of perl
print Dumper( $Module::CoreList::version{ $] } );
 # Prints undef
print Dumper( $Module::CoreList::version{ "$]" } );
 # Prints undef
print Dumper( $Module::CoreList::version{ 5.010000 } ); 
 # Prints "correct" list ...