谁能告诉我代码的哪一部分是错的？
这是通过this repo转换成c的main.cpp file，程序在顶点和主循环之间停止工作

// depth testing (drawing faces properly)
    glEnable(GL_DEPTH_TEST);

    // shader loading
    unsigned int program_id = load_shaders("vertex.vert", "fragment.vert");

    // provide triangle vertices
    float vertices[] = {
        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,
        0.5f, -0.5f, -0.5f,  1.0f, 0.0f,
        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
        -0.5f, -0.5f, -0.5f,  0.0f, 0.0f,

        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
        0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
        0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
        0.5f,  0.5f,  0.5f,  1.0f, 1.0f,
        -0.5f,  0.5f,  0.5f,  0.0f, 1.0f,
        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,

        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
        -0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
        -0.5f,  0.5f,  0.5f,  1.0f, 0.0f,

        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
        0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
        0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
        0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,

        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,
        0.5f, -0.5f, -0.5f,  1.0f, 1.0f,
        0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
        0.5f, -0.5f,  0.5f,  1.0f, 0.0f,
        -0.5f, -0.5f,  0.5f,  0.0f, 0.0f,
        -0.5f, -0.5f, -0.5f,  0.0f, 1.0f,

        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f,
        0.5f,  0.5f, -0.5f,  1.0f, 1.0f,
        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
        0.5f,  0.5f,  0.5f,  1.0f, 0.0f,
        -0.5f,  0.5f,  0.5f,  0.0f, 0.0f,
        -0.5f,  0.5f, -0.5f,  0.0f, 1.0f
    };

    // world positions for cubes
    vec3 cube_positions[] = {
        { 0.0f,  0.0f,  0.0f},
        { 2.0f,  5.0f, -15.0f},
        {-1.5f, -2.2f, -2.5f},
        {-3.8f, -2.0f, -12.3f},
        { 2.4f, -0.4f, -3.5f},
        {-1.7f,  3.0f, -7.5f},
        { 1.3f, -2.0f, -2.5f},
        { 1.5f,  2.0f, -2.5f},
        { 1.5f,  0.2f, -1.5f},
        {-1.3f,  1.0f, -1.5f}
    };
    // specify how to use triangle data
    unsigned int VBO, VAO;
    glGenVertexArrays(1, &VAO);
    glGenBuffers(1, &VBO);

    // bind vao, and buffers and tell OpenGL what to do with the data assigned
    glBindVertexArray(VAO);

    glBindBuffer(GL_ARRAY_BUFFER, VBO);
    glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);

    // position attribute
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)0);
    glEnableVertexAttribArray(0);

    // texture attribute
    glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void*)(3 * sizeof(float)));
    glEnableVertexAttribArray(1);

    // mainloop
    while(!glfwWindowShouldClose(window))
    {
        // bind custom functions
        process_input(window);

        // color the window
        glClearColor(0.3f, 0.0f, 0.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        // bind textures
        glActiveTexture(GL_TEXTURE0);
        glBindTexture(GL_TEXTURE_2D, texture1);
        glActiveTexture(GL_TEXTURE1);
        glBindTexture(GL_TEXTURE_2D, texture2);

        // active shader
        use_shader(program_id);

        // create transformations
        mat4 view = GLM_MAT4_IDENTITY_INIT;
        mat4 projection = GLM_MAT4_IDENTITY_INIT;
        glm_perspective(glm_rad(45.0f), (float)win_width / (float)win_height, 0.1f, 100.0f, projection);
        glm_translate(view, (vec3){0.0f, 0.0f, -3.0f});
        // pass transformation matrices to the shader
        set_mat_4(program_id, "projection", projection);
        set_mat_4(program_id, "view", view);

        // render multiple cubes
        glBindVertexArray(VAO);
        for (unsigned int i; i < 10; i++)
        {
            // calculate the model matrix for each object and pass it to the shader before drawing
            mat4 model = GLM_MAT4_IDENTITY_INIT;
            glm_translate(model, cube_positions[i]);
            float angle = 20.0f * i;
            glm_rotate(model, glm_rad(angle), (vec3){1.0f, 0.3f, 0.5f});
            set_mat_4(program_id, "model", model);

            glDrawArrays(GL_TRIANGLES, 0, 36);
        }

        // double buffer and check for I/O events
        glfwPollEvents();
        glfwSwapBuffers(window);
    }

这是着色器加载器的情况下，问题是在这里，但我怀疑它

void set_mat_4(unsigned int program_id, const char* name, const mat4 mat)
{
    glUniformMatrix4fv(glGetUniformLocation(program_id, name), 1, GL_FALSE, &mat[0][0]);
}

这是顶点着色器（如果你好奇）这有可能是问题，但真的怀疑

# version 330 core

layout (location = 0) in vec3 a_pos;
layout (location = 1) in vec2 a_tex_coord;

out vec2 tex_coord;

// matrices
uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;

void main()
{
    gl_Position = projection * view * model * vec4(a_pos, 1.0f);
    tex_coord = vec2(a_tex_coord.x, 1.0 - a_tex_coord.y);
};

这是片段着色器（这几乎不可能是问题，但如果是，那么它就是）

# version 330 core

out vec4 frag_color;

in vec2 tex_coord;

uniform sampler2D texture1;
uniform sampler2D texture2;

void main()
{
    frag_color = mix(texture(texture1, tex_coord), texture(texture2, tex_coord), 0.2);
};