Details
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Suggestion
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Resolution: Incomplete
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P2: Important
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None
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None
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Windows
Description
A customer managed to trigger a crash in a complex application that contains nested event loops:
MyApp.exe!QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject * receiver, QEvent * event) Zeile 1299 C++ MyApp.exe!QApplicationPrivate::notify_helper(QObject * receiver, QEvent * e) Zeile 3290 C++ MyApp.exe!QApplication::notify(QObject * receiver, QEvent * e) Zeile 3247 C++ MyApp.exe!QCoreApplication::notifyInternal2(QObject * receiver, QEvent * event) Zeile 1168 C++ [Inlineframe] MyApp.exe!QCoreApplication::sendEvent(QObject *) Zeile 1612 C++ > MyApp.exe!QEventDispatcherWin32::event(QEvent * e) Zeile 866 C++ MyApp.exe!QApplicationPrivate::notify_helper(QObject * receiver, QEvent * e) Zeile 3300 C++ MyApp.exe!QApplication::notify(QObject * receiver, QEvent * e) Zeile 3247 C++ MyApp.exe!QCoreApplication::notifyInternal2(QObject * receiver, QEvent * event) Zeile 1168 C++ [Inlineframe] MyApp.exe!QCoreApplication::sendEvent(QObject *) Zeile 1612 C++ MyApp.exe!QCoreApplicationPrivate::sendPostedEvents(QObject * receiver, int event_type, QThreadData * data) Zeile 1968 C++ [Inlineframe] MyApp.exe!QEventDispatcherWin32::sendPostedEvents() Zeile 899 C++ MyApp.exe!QWindowsGuiEventDispatcher::sendPostedEvents() Zeile 44 C++ MyApp.exe!QEventDispatcherWin32::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Zeile 470 C++ MyApp.exe!QWindowsGuiEventDispatcher::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Zeile 37 C++ [Inlineframe] MyApp.exe!QEventLoop::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag>) Zeile 103 C++ MyApp.exe!QEventLoop::exec(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Zeile 193 C++
QEventDispatcherWin32::event() was called with a receiver that has already been destroyed:
bool QEventDispatcherWin32::event(QEvent *e) { Q_D(QEventDispatcherWin32); switch (e->type()) { case QEvent::ZeroTimerEvent: { QZeroTimerEvent *zte = static_cast<QZeroTimerEvent*>(e); WinTimerInfo *t = d->timerDict.value(zte->timerId()); if (t) { t->inTimerEvent = true; QTimerEvent te(zte->timerId()); QCoreApplication::sendEvent(t->obj, &te); // t->obj was a dangling pointer // ...
Suggestion
Make WinTimerInfo::obj a QPointer instead of a raw pointer
Attachments
Issue Links
- duplicates
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QTBUG-124496 QObject::timerEvent may be called before the timer elapsed
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- Closed
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