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.
static void apply(const char * begin, const size_t size, unsigned char * out_char_data)
    {
        SHA512_CTX ctx;
        SHA512_Init(&ctx);
        SHA512_Update(&ctx, reinterpret_cast<const unsigned char *>(begin), size);
        SHA512_Final(out_char_data, &ctx);
    }
};
#endif
struct SipHash64Impl
{
    static constexpr auto name = "sipHash64";
    using ReturnType = UInt64;
    static UInt64 apply(const char * begin, size_t size)
    {
        return sipHash64(begin, size);
    }
    static UInt64 combineHashes(UInt64 h1, UInt64 h2)
    {
        return combineHashesFunc<UInt64, SipHash64Impl>(h1, h2);
    }
    static constexpr bool use_int_hash_for_pods = false;
};
struct SipHash128Impl
{
    static constexpr auto name = "sipHash128";
    using ReturnType = UInt128;
    static UInt128 combineHashes(UInt128 h1, UInt128 h2)