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  1. Qt
  2. QTBUG-138455

Integer division by zero in QFontCache::decreaseCache()

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    • Icon: Bug Bug
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    • Icon: P1: Critical P1: Critical
    • None
    • 6.8.3
    • GUI: Text handling
    • None

      Found this in our user crash reports on Sentry. Unfortunately, there are no much details as we do not reproduce it locally.

      Unhandled exception at 0x00007FFBC6C2883F (Qt6Gui.dll) in 8122b132-fb06-4c62-a22b-4ccb0237a81f.dmp: 0xC0000094: Integer division by zero.

      Call stack:

      >	Qt6Gui.dll!QFontCache::decreaseCache() Line 3619	C++
 	Qt6Core.dll!QObject::event(QEvent * e) Line 1453	C++
 	Qt6Core.dll!QCoreApplication::notifyInternal2(QObject * receiver, QEvent * event) Line 1177	C++
 	Qt6Core.dll!QEventDispatcherWin32Private::sendTimerEvent(int timerId) Line 403	C++
 	Qt6Core.dll!qt_internal_proc(HWND__ * hwnd, unsigned int message, unsigned __int64 wp, __int64 lp) Line 212	C++
 	[External Code]	
 	Qt6Core.dll!QEventDispatcherWin32::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 539	C++
 	Qt6Gui.dll!QWindowsGuiEventDispatcher::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 37	C++
 	[Inline Frame] Qt6Core.dll!QEventLoop::processEvents(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 103	C++
 	Qt6Core.dll!QEventLoop::exec(QFlags<enum QEventLoop::ProcessEventsFlag> flags) Line 184	C++
 	Qt6Core.dll!QCoreApplication::exec() Line 1520	C++

        1. image-2025-07-12-15-16-49-193.png
          164 kB
          Vladimir Belyavsky
        For Gerrit Dashboard: QTBUG-138455
        # Subject Branch Project Status CR V
        660631,5 QFont: fix potential "Integer division by zero" in QFontCache::decreaseCache() dev qt/qtbase Status: NEW +2 0

            esabraha Eskil Abrahamsen Blomfeldt
            studiosus Vladimir Belyavsky
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              Created:
              Updated:
              Resolved: