PT-2026-4643

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475607265 Crash type: Heap-use-after-free READ 8 Crash state: graph::LigatureSubstFormat1::shrink graph::LigatureSubstFormat1::split context t::shrink hb vector t graph::actuate subtable splitgraph::LigatureSu...