qt android 报错 FORTIFY: pthread_mutex_lock called on a destroyed mutex 和 HandleUsingDestroyedMutex

先来看一个代码片段

Test::Test()
{
	thread = new QThread;
	QObject::connect(thread , &QThread::started,
        [&]()
        {
            while (running) {
            	mtx.lock(); // QMutex
            	waiter.wait(&mtx); // QWaitCondition
            	.....
				mtx.unlock();
            }
        });
    thread.start();
}

Test::~Test()
{
	running = false;
	if (thread.isRunning()) {
		waiter.wakeAll();
		thread.quit();
		thread.wait();
	}
}

上面代码当线程一直在运行中
且APP已经退出（即代码已经走到了return app.exec())
此时如果系统调用了Class Test的析构函数
会报错FORTIFY: pthread_mutex_lock called on a destroyed mutex

意思是
通过QWaitCondition和QMutex来阻塞线程
在析构函数才退出线程的时候，就会触发这个报错
正确的做法是不直接return app.exec();
如下代码所示:

QGuiApplication app(argc, argv);

......

auto exec = app.exec();

// 此处调用退出子线程代码
......

// 返回exec
return exec