OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20116
Crash type: Heap-buffer-overflow WRITE 4 Crash state: arrow::UnionType::UnionType arrow::union_ arrow::ipc::internal::ConcreteTypeFromFlatbuffer
{ "severity": "HIGH", "introduced_range": "unknown:ccdc4b076cbd5fb03e1cbc42292def871d2b6035" }