OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=58671
Crash type: UNKNOWN WRITE
Crash state:
bool OT::Layout::Common::CoverageFormat2_4<OT::Layout::MediumTypes>::serialize<h
bool OT::Layout::Common::Coverage::serialize<hb_sorted_array_t<unsigned int cons
OT::Layout::GSUB_impl::AlternateSubstFormat1_2<OT::Layout::SmallTypes>::subset