This program has performed an illegal operation in Windows means that it tried to execute something that wasn't a command.

I think you can also get that error by attempting to write to memory that isn't allocated to you (e.g., in case of a buffer overrunwild pointer). I can't prove it, though, and it's possible I'm mistaken.

Update: wild pointer is a much better example than buffer overrun of why this would happen.
;$;=sub{$/};@;=map{my($a,$b)=($_,$;);$;=sub{$a.$b->()}} split//,".rekcah lreP rehtona tsuJ";$\=$;[-1]->();print

In reply to Re: ActivateState crasher by jonadab
in thread ActivePerl crasher by zude

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