OSV-2021-1518 UNKNOWN READ in bool OT::OffsetTo<OT::ClipBox, OT::IntType<unsigned int, 3u>, true>::serialize_c

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40540 Crash type: UNKNOWN READ Crash state: bool OT::OffsetTo, true::serializec OT::ClipList::serializecliprecords OT::ClipList::subset...