OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14641
Crash type: Use-of-uninitialized-value
Crash state:
hb_hashmap_t<hb_serialize_context_t::object_t const*, unsigned int,
hb_hashmap_t<hb_serialize_context_t::object_t const*, unsigned int,
hb_hashmap_t<hb_serialize_context_t::object_t const*, unsigned int,