为什么函数SDL_WaitEvent（SDL2）在我的代码中出错？

Question

我正在像引擎那样的Doom上工作，有时会检测到段错误，有时会被检测为segfault由于sig abort ，有时也会出现此错误：

线程已经在初始化该类！

我使用了lldb ，它表明函数WaitEvent出现错误。 SDL_Event事件是通过此函数初始化的，有些我不知道如何得到错误。

void    ft_init_sdl(t_var *var)
{
    var->sdl.window = NULL;
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS) < 0)
        return ;
    var->sdl.window = SDL_CreateWindow("DOOM", SDL_WINDOWPOS_CENTERED, \
            SDL_WINDOWPOS_CENTERED, SIZE_X, SIZE_Y, 0);
    var->sdl.render = SDL_CreateRenderer(var->sdl.window, -1, 1);
    if (!var->sdl.window || !var->sdl.render)
        return ;
}

在这里调用SDL_WaitEvent ：

void    display(t_var *var)
{
    sdl_clean_screen(var->sdl.render);
    neo_display(var);
    while (SDL_WaitEvent(&var->sdl.event))
    {
        if (var->sdl.event.type == SDL_QUIT)
            ft_clean_quit(var->sdl.render, var->sdl.window);
        else if (var->sdl.event.key.keysym.sym == SDLK_ESCAPE)
            ft_clean_quit(var->sdl.render, var->sdl.window);
        else if (var->sdl.event.type == SDL_KEYDOWN)
        {
            if (var->sdl.event.key.keysym.sym == SDLK_d)
            {
                var->player.angle += 6;
                var->player.pcos = cos(var->player.angle * RAD);
                var->player.psin = sin(var->player.angle * RAD);
                sdl_clean_screen(var->sdl.render);
                neo_display(var);
            }
            else if (var->sdl.event.key.keysym.sym == SDLK_a)
            {
                var->player.angle -= 6;
                var->player.pcos = cos(var->player.angle * RAD);
                var->player.psin = sin(var->player.angle * RAD);
                sdl_clean_screen(var->sdl.render);
                neo_display(var);
            }
            else if (var->sdl.event.key.keysym.sym == SDLK_w)
            {
                forward(var, 4, var->player.angle);
                sdl_clean_screen(var->sdl.render);
                neo_display(var);
            }
            else if (var->sdl.event.key.keysym.sym == SDLK_s)
            {
                backward(var, 4, var->player.angle);
                sdl_clean_screen(var->sdl.render);
                neo_display(var);
            }
        }
    }
}