OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=396460413
Crash type: Heap-buffer-overflow WRITE {*} Crash state: vips_foreign_save_heif_write_block wbuffer_write_thread vips_threadset_work
{ "severity": "HIGH" }
{ "fixed_range": "762f5030c82861a8d4b981cb398f81e70d002bd9:68d859f9b7cc8f7d6748bfc44037e8c233b03d7b" }