This one may be somewhat system-dependent but worked with quite different flavours of Perl. I expect it will be difficult to predict without actually using a perl binary. Have fun! 
eval'[]->Jk',$^X=~m;(?:.*[\\/])?([^\W\d]+);;$==ord('?'^':'),$,=q**
,*_=[map+chr,$[..$=<<$=],*_={map{;$_,++$=}grep/(?=\W)[$"-~]/,@_},*
_=sub{map{join$,,@_[@_{split$,,$_}]}+$,."->]'","!?;'(&}","(! .\\}"
},*_=[_(split$,,$@),"\u$1"],*_=\"@_[$[,!!!$[,-!$[,$#_^!$[],",print

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In reply to What Perl Will Tell by martin

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