Abhijit is nearly god! He wrote Perl_re_dup for duplicating regexes when we perl_clone! He wrote it without having a test case and without compiling. And it worked out of the box.
He also fell asleep at his keyboard last night trying to fix it, that kind of dedication is amazing.
And what more, it fixed another case of regex reentrancy problems, now to fix the leaks and we are all set!
Artur