Crash on serialize about sameboy HOT 5 CLOSED

bool retro_serialize(void *data, size_t size)
{

    if (!initialized)
        return false;


    void* save_data[2];
    size_t state_size[2];

    for (int i = 0; i < emulated_devices; i++)
    {
        state_size[i] = GB_get_save_state_size(&gameboy[i]);
        save_data[i] = (uint8_t*)malloc(state_size[i]);
        GB_save_state_to_buffer(&gameboy[i], (uint8_t*) save_data[i]);
        memcpy(data + (state_size[i] * i), save_data[i], state_size[i]);
        free(save_data[i]);
    }

    if (data)
        return true;
    else
        return false;
}

bool retro_serialize(void *data, size_t size)
{

    if (!initialized)
        return false;

    void* save_data[2];
    size_t state_size[2];
    size_t offset = 0;

    for (int i = 0; i < emulated_devices; i++)
    {
        state_size[i] = GB_get_save_state_size(&gameboy[i]);
        save_data[i] = (uint8_t*)malloc(state_size[i]);
        GB_save_state_to_buffer(&gameboy[i], (uint8_t*) save_data[i]);
        memcpy(data + offset, save_data[i], state_size[i]);
        offset += state_size[i];
        free(save_data[i]);
    }

    if (data)
        return true;
    else
        return false;
}```

Seems better at least but the crash persists.