in reply to REALLY PERL ??

In some situations, the compiler has a really hard time to get what's wrong in the first place. 

qwurx [shmem] ~> perl -Mstrict -E 's->{ID}'
Substitution pattern not terminated at -e line 1.

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Surely the compiler was looking for more dashes to appear in the source to complete s/// (written as s---), which happened many more lines down. Then something else went wrong, probably - hard to tell without seeing the complete code.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In Section Seekers of Perl Wisdom