在C++中实现队列结构和线程时未预先打印语句时获取Seg错误

#include <iostream>
#include <queue>
#include <thread>
#include <mutex>
#include <condition_variable>

std::queue<int> myQueue;
std::mutex mtx;
std::condition_variable cv;

void producer()
{
    for (int i = 0; i < 10; i++)
    {
        std::lock_guard<std::mutex> lock(mtx);
        myQueue.push(i);
        cv.notify_one(); // 通知消费者线程有新的元素
    }
}

void consumer()
{
    while (true)
    {
        std::unique_lock<std::mutex> lock(mtx);
        cv.wait(lock, [] { return !myQueue.empty(); }); // 等待队列不为空
        int front = myQueue.front();
        myQueue.pop();
        lock.unlock();

        std::cout << "Consumed: " << front << std::endl;
    }
}

int main()
{
    std::thread producerThread(producer);
    std::thread consumerThread(consumer);

    producerThread.join();
    consumerThread.join();

    return 0;
}