:) it pretty much does that by default :) 
$ perl -e" my $re = shift;  1 =~ /$re/; "  "(??{die666})"
Eval-group not allowed at runtime, use re 'eval' in regex m/(??{die666
+})/ at -e line 1.

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In reply to Re^2: Untaint a string match, regular expression. by Anonymous Monk
in thread Untaint a string match, regular expression. by cheako

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