class Updater: public QObject{
private:
QNetworkAccessManager *mgr;
public:
Updater(){ mgr = new QNetworkAccessManager(); // crashes here
};
~Updater();
void CheckFiles();
}

i'm running class like that:

    QFuture<void> ft = QtConcurrent::run([&]{
                                                 Updater *upd = new Updater();
                                             }
                                         );

Why?And how can i fix that?