OSV-2018-417 UNKNOWN READ in boost::sub_match<std::__1::__wrap_iter<char const*> >::sub_match

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9539 Crash type: UNKNOWN READ Crash state: boost::submatch ::submatch ZNSt316vectorIN5boost9submatchINS11wrapiterIPKcEEEENS9allocatorIS7EEE1 boost::matchresults, std::1::allocatorboo...