Details
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Bug
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Resolution: Duplicate
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P1: Critical
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None
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6.2.1
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None
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Windows 10, MSVC 2019
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All
Description
Sporadic crash on QPMCache::flushDetachedPixmaps call.
Exception thrown: read access violation. **QPMCache::get**(...) returned nullptr.
Qt6Guid.dll!qHash(const QPixmapCache::Key & k, unsigned __int64 seed) Line 258 C++ Qt6Guid.dll!QHashPrivate::calculateHash<QPixmapCache::Key>(const QPixmapCache::Key & t, unsigned __int64 seed) Line 103 C++ Qt6Guid.dll!QHashPrivate::Data<QCache<QPixmapCache::Key,QPixmapCacheEntry>::Node>::find(const QPixmapCache::Key & key) Line 592 C++ Qt6Guid.dll!QCache<QPixmapCache::Key,QPixmapCacheEntry>::unlink(QCache<QPixmapCache::Key,QPixmapCacheEntry>::Node * n) Line 159 C++ Qt6Guid.dll!QCache<QPixmapCache::Key,QPixmapCacheEntry>::trim(__int64 m) Line 187 C++ Qt6Guid.dll!QCache<QPixmapCache::Key,QPixmapCacheEntry>::setMaxCost(__int64 m) Line 211 C++ > Qt6Guid.dll!QPMCache::flushDetachedPixmaps(bool nt) Line 291 C++ Qt6Guid.dll!QPMCache::timerEvent(QTimerEvent * __formal) Line 312 C++ Qt6Cored.dll!QObject::event(QEvent * e) Line 1343 C++ Qt6Widgetsd.dll!QApplicationPrivate::notify_helper(QObject * receiver, QEvent * e) Line 3405 C++ Qt6Widgetsd.dll!QApplication::notify(QObject * receiver, QEvent * e) Line 2764 C++ Qt6Cored.dll!QCoreApplication::notifyInternal2(QObject * receiver, QEvent * event) Line 1063 C++ Qt6Cored.dll!QCoreApplication::sendEvent(QObject * receiver, QEvent * event) Line 1472 C++ Qt6Cored.dll!QEventDispatcherWin32Private::sendTimerEvent(int timerId) Line 407 C++ Qt6Cored.dll!qt_internal_proc(HWND__ * hwnd, unsigned int message, unsigned __int64 wp, __int64 lp) Line 231 C++ [External Code] Qt6Cored.dll!QEventDispatcherWin32::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 543 C++ Qt6Guid.dll!QWindowsGuiEventDispatcher::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 72 C++ Qt6Cored.dll!QEventLoop::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 140 C++ Qt6Cored.dll!QEventLoop::exec(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 230 C++ Qt6Cored.dll!QCoreApplication::exec() Line 1378 C++ Qt6Guid.dll!QGuiApplication::exec() Line 1861 C++ Qt6Widgetsd.dll!QApplication::exec() Line 2615 C++
It crashes when trying to calculate qHash() for null value (QPixmapCache::Key).
Take a look on debugger screenshot below.
Unfortunately I have now exact steps or examples,
but it seems that adding trivial check on null value in qHash(QPixmapCache::Key) may fix the issue.
I got this crash on Windows 10. But probably it's relevant for all platforms.
Attachments
Issue Links
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- Closed
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- Closed
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- Closed
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