# We don't need that. It's just wrong: my $errorlog='';
if (...) {
    warn 'Oops'; # Oh, by the way: Unless you add "\n", you will see file and line in the log.
}
if (...) {
    warn 'Oh noes';
}
foo(...);
if (...) {
    warn 'Outch";
}
say "All done, bye.";