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.
{
        throw Exception("Hive hash is not combineable for multiple arguments", ErrorCodes::NOT_IMPLEMENTED);
    }
    static constexpr bool use_int_hash_for_pods = false;
};
struct ImplCityHash64
{
    static constexpr auto name = "cityHash64";
    using ReturnType = UInt64;
    using uint128_t = CityHash_v1_0_2::uint128;
    static auto combineHashes(UInt64 h1, UInt64 h2) { return CityHash_v1_0_2::Hash128to64(uint128_t(h1, h2)); }
    static auto apply(const char * s, const size_t len) { return CityHash_v1_0_2::CityHash64(s, len); }
    static constexpr bool use_int_hash_for_pods = true;
};
struct ImplFarmFingerprint64
{
    static constexpr auto name = "farmFingerprint64";
    using ReturnType = UInt64;
    using uint128_t = NAMESPACE_FOR_HASH_FUNCTIONS::uint128_t;
    static auto combineHashes(UInt64 h1, UInt64 h2) { return NAMESPACE_FOR_HASH_FUNCTIONS::Fingerprint(uint128_t(h1, h2)); }
    static auto apply(const char * s, const size_t len) { return NAMESPACE_FOR_HASH_FUNCTIONS::Fingerprint64(s, len); }
    static constexpr bool use_int_hash_for_pods = true;
};
struct ImplFarmHash64
{
    static constexpr auto name = "farmHash64";
    using ReturnType = UInt64;
    using uint128_t = NAMESPACE_FOR_HASH_FUNCTIONS::uint128_t;
    static auto combineHashes(UInt64 h1, UInt64 h2) { return NAMESPACE_FOR_HASH_FUNCTIONS::Hash128to64(uint128_t(h1, h2)); }