>perl -wle"use base 'CGI'; sub f { $CGI::VERSION } print f();"
3.49

##</code><code>##

>perl -wle"sub f { $CGI::VERSION } use base 'CGI'; print f();"
-1, set by base.pm

##</code><code>##

>perl -wle"sub f { ${'CGI::VERSION'} } use base 'CGI'; print f();"
3.49

##</code><code>##

perl -MCGI -MTemplate checksetup.pl