OSV-2020-1446 Segv on unknown address in clang::Sema::CreateOverloadedBinOp

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19567 Crash type: Segv on unknown address Crash state: clang::Sema::CreateOverloadedBinOp BuildOverloadedBinOp clang::Sema::BuildBinOp...