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.
{
        return MurmurHash2(data, size, 0);
    }
    static UInt32 combineHashes(UInt32 h1, UInt32 h2)
    {
        return IntHash32Impl::apply(h1) ^ h2;
    }
    static constexpr bool use_int_hash_for_pods = false;
};
struct MurmurHash2Impl64
{
    static constexpr auto name = "murmurHash2_64";
    using ReturnType = UInt64;
    static UInt64 apply(const char * data, const size_t size)
    {
        return MurmurHash64A(data, size, 0);
    }
    static UInt64 combineHashes(UInt64 h1, UInt64 h2)
    {
        return IntHash64Impl::apply(h1) ^ h2;
    }
    static constexpr bool use_int_hash_for_pods = false;
};
struct GccMurmurHashImpl
{
    static constexpr auto name = "gccMurmurHash";
    using ReturnType = UInt64;
    static UInt64 apply(const char * data, const size_t size)