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  1. Qt
  2. QTBUG-68997

QQuickRenderControl destructor breaks deleteLater

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    • Platform/s:
      Linux/Wayland

      Description

      Under normal conditions it should be safe to rely on deleteLater() to not be processed until we hit the event loop

      HoweverQQuickRenderControlPrivate::windowDestroyed contains the line

              QCoreApplication::sendPostedEvents(nullptr, QEvent::DeferredDelete);

       

      which gives very strange behaviour in client code.This will crash at the second debug statement

          auto obj = new QObject(this);
          obj->setProperty("DAVE", "DAVE");
          obj->deleteLater();
          qDebug() << obj->property("DAVE");
          {
              QQuickRenderControl c;
              QQuickWindow w(&c);
          }
          qDebug() << obj->property("DAVE");
      

      Guarding all possible usage of objects that might be used in the same event as the destruction of a QQuickwindow in a render control simply isn't feasible.

       

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        # Subject Branch Project Status CR V

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            Assignee:
            davidedmundson David Edmundson
            Reporter:
            davidedmundson David Edmundson
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