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每当我尝试调整窗口大小时，都会遇到这个问题：Exception thrown at 0x0000000000000000 in fps-opengl.exe: 0xC0000005: Access violation executing location 0x0000000000000000.
这是我目前为止的代码：

#include "engine.h"
#include "Source.h"

//void framebuffer_size_callback(GLFWwindow* window, int width, int height);
int main() {

    //engine engine();
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

    GLFWwindow* window = glfwCreateWindow(800, 600, "wonder window", NULL, NULL);

    if (window == nullptr) {
        std::cout << "error init window" << std::endl;
        glfwTerminate();
        return -1;
    }
    glfwMakeContextCurrent(window);
    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
    while (!glfwWindowShouldClose(window)) {
        // implement calculation of elapsed time here pass to onuserinput
        //engine.onuserinput();
        glfwSwapBuffers(window);
        glfwPollEvents();
    }
    glfwTerminate();
    return 0;
}
void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    glViewport(0, 0, width, height);
}

engine.h是空的，除了glfw includes和glad。Visual studio在glviewport行后发现错误。