OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=49381
Crash type: UNKNOWN READ
Crash state:
std::__1::basic_filebuf<char, std::__1::char_traits<char> >::underflow
std::__1::basic_streambuf<char, std::__1::char_traits<char> >::uflow
std::__1::basic_streambuf<char, std::__1::char_traits<char> >::xsgetn