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  1. Qt
  2. QTBUG-54693

QFileDialog::getOpenFileName crashes when parent is deleted while dialog is open

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    • 5
    • 81d55f772 (dev), ca3fa76a4 (6.8), 746c1b611 (6.7), 150b856f0 (tqtc/lts-6.5)
    • Foundation Sprint 104, Foundation Sprint 105, Foundation Sprint 106, Foundation Sprint 115

      Calling "QFileDialog::getOpenFileName" and then deleting the parent given to this function will crash Qt on Windows 10 64-bit.

      I suspect the reason is similar to: https://blogs.kde.org/2009/03/26/how-crash-almost-every-qtkde-application-and-how-fix-it-0

      Update
      In case it helps, this will easily reproduce the crash:

      int main(int argc, char **argv) {
  QApplication application{argc, argv};

  QMainWindow *main_window = new QMainWindow();
  main_window->show();

  QPushButton *button = new QPushButton("Press me");
  main_window->setCentralWidget(button);

  QObject::connect(button, &QPushButton::clicked, [main_window]() {
    QTimer::singleShot(2000, [main_window]() { delete main_window; });

    QFileDialog::getOpenFileName(main_window, "Close me fast or I will crash!");
  });

  application.exec();

  return 0;
}

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            tatiana.borisova Tatiana Borisova
            rggjan Jan Rüegg
            Vladimir Minenko Vladimir Minenko
            Alex Blasche Alex Blasche
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              Created:
              Updated:
              Resolved: