% perl -MO=Deparse -pl40
^D
 LINE: while (defined($_ = <ARGV>)) {
    chomp $_;
}
continue {
    print $_;
}
- syntax OK
% perl -MO=Deparse -pl40 -e 1
 LINE: while (defined($_ = <ARGV>)) {
    chomp $_;
    '???';
}
continue {
    print $_;
}
-e syntax OK