in reply to Re: eval "require $class" seems wrong
in thread eval "require $class" seems wrong

That's not the same thing! Compare: 
perl -Mstrict -e 'my $c="CGI";eval "require $c";die $@ if $@'
perl -Mstrict -e 'my $c="CGI";eval {require $c};die $@ if $@'

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In Section Seekers of Perl Wisdom