https://github.com/ClickHouse/ClickHouse/blob/9a48cf0da8badfc5f3da08611eb44961aa28e3f6/src/Functions/FunctionsHashing.h#L669-L671

There's a call to `blake3_free_char_pointer` that passes ownership of the pointer back to Rust (which then frees the memory), then there's a call to `std::string`'s constructor that accepts that now-freed pointer.
#pragma once
#include <city.h>
#include <farmhash.h>
#include <metrohash.h>
#include <wyhash.h>
#include <MurmurHash2.h>
#include <MurmurHash3.h>
#include "config.h"
#ifdef __clang__
#    pragma clang diagnostic push
#    pragma clang diagnostic ignored "-Wused-but-marked-unused"
#endif
#include <xxhash.h>
#if USE_BLAKE3
#    include <blake3.h>
#endif
#include <Common/SipHash.h>
#include <Common/typeid_cast.h>
#include <Common/safe_cast.h>
#include <Common/HashTable/Hash.h>
#if USE_SSL
#    include <openssl/md4.h>
#    include <openssl/md5.h>
#    include <openssl/sha.h>
#endif