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#ifndef TTT_H
#define TTT_H

#include <QObject>
#include <QDebug>

class TTT : public QObject
{
    Q_OBJECT
public:
    TTT(QObject *parent = 0){
        connect(this, SIGNAL(destroyed()), this, SLOT(tmp()));
    }

signals:

public slots:
    void tmp(){
        qDebug()<<"END";
    }
};

#endif // TTT_H


#include <QApplication>
#include "TTT.h"


int main(int argc, char **argv)
{
    QApplication app(argc, argv);
    TTT *ttt = new TTT;
    delete ttt;
    return app.exec();
}

Worker *w = new Worker;
QThread *t = new QThread;
w->moveToThread(t);
connect(this, SIGNAL(destroyed()), w, SLOT(stop()));
connect(w, SIGNAL(finished()), t, SLOT(quit()));
connect(w, SIGNAL(finished()), w, SLOT(deleteLater()));
t->start();