$ perl -le "binmode STDOUT; print chr($_) for 0 .. 43" > notperl.pl

$ perl notperl.pl
Unrecognized character \x01; marked by <-- HERE after <-- HERE near column 1 at notperl.pl line 2.

$ perl -Mdiagnostics notperl.pl
Unrecognized character \x01; marked by <-- HERE after <-- HERE near column 1 at
        notperl.pl line 2 (#1)
    (F) The Perl parser has no idea what to do with the specified character
    in your Perl script (or eval) near the specified column.  Perhaps you tried
    to run a compressed script, a binary program, or a directory as a Perl program.

Uncaught exception from user code:
        Unrecognized character \x01; marked by <-- HERE after <-- HERE near column 1 at notperl.pl line 2.
 at notperl.pl line 2


##</code><code>##

export LANG=...