lanx@nc10-ubuntu:/tmp$ cat end_pkg.pl 
print <DATA>;
package TST;
1;
__END__
end

lanx@nc10-ubuntu:/tmp$ perl -MO=Deparse end_pkg.pl 
print <DATA>;
package TST;
'???';
end_pkg.pl syntax OK

lanx@nc10-ubuntu:/tmp$ perl end_pkg.pl 
end

lanx@nc10-ubuntu:/tmp$ perl -MB::Deparse -E 'say "$B::Deparse::VERSION"'
0.83