use re 'eval'

        (?{system "rm -rf /"; print "Sucker!\n"})

• Solution: At compile time, count the number of literal (?{...})'s

• Record this in the regex bytecode

• Count again after interpolation

• If after > before, then abort:

        Eval-group not allowed at runtime, use re 'eval' in regex m/.../

• OK, but what does use re 'eval' mean?

• use re 'eval' disables the safety checks

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Copyright © 2001 M. J. Dominus