croaring: stack-buffer-overflow in art_insert_at

With the following new fuzz target: include include include include include include int LLVMFuzzerTestOneInputconst uint8t data, sizet size if size == 0 return 0; // Deserialize the provided data as a roaring64bitmapt. roaring64bitmapt r = roaring64bitmapportabledeserializesafe const char data,...