pcre has been fuzzed by quite a few people a while ago, I remember also having reported a couple of issues. When I tested re2 nothing showed up. oniguruma also

pcre has been fuzzed by quite a few people a while ago, I remember also having reported a couple of issues. When I tested re2 nothing showed up. oniguruma also had quite a few issues, I tested it with libfuzzer lately. But everything should be fixed now.