OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34443
Crash type: UNKNOWN READ
Crash state:
std::__1::__tree<std::__1::__value_type<Json::Value::CZString, Json::Value>, std
std::__1::map<Json::Value::CZString, Json::Value, std::__1::less<Json::Value::CZ
Json::Value::begin