OSV-2023-380 UNKNOWN WRITE in bool OT::Layout::Common::Coverage::serialize<hb_map_iter_t<hb_map_iter_t<hb_filt

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58663 Crash type: UNKNOWN WRITE Crash state: bool OT::Layout::Common::Coverage::serialize::subset hbsubsetcontextt::returnt OT::Layout::GSUBimpl::SubstLookupSubTable::dispat...