[Octave-bug-tracker] [bug #58739] Spurious crash due to exception in Qt5Core.dll

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?58739>

                 Summary: Spurious crash due to exception in Qt5Core.dll
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Thu 09 Jul 2020 02:37:26 PM UTC
                Category: GUI
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Segfault, Bus Error, etc.
                  Status: None
             Assigned to: None
         Originator Name: Jens Potschadtke
        Originator Email: jens.potschadtke@corscience.de
             Open/Closed: Open
                 Release: 5.2.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

>From time to time I get a crash of the Octave GUI program under Windows 10.

The windows system shows a popup window with the following text:

Ausnahmefehler bei 0x0000000000E00C4B (Qt5Core.dll) in octave-gui.exe:
0xC0000602:  Ein sofortiger Ausnahmefehler ist aufgetreten. Die
Ausnahmehandler werden nicht aufgerufen, und der Prozess wird sofort beendet 

With procexplorer I was able to get a stackdump of the probable offending
thread. It reads:

KERNELBASE.dll!RaiseFailFastException+0xaf
Qt5Core.dll!Zls6QDebugRK23QOperatingSystemVersion+0x46b
Qt5Core.dll!ZNK14QMessageLogger5fatalEPKcz+0x7d
Qt5Core.dll!Z9qt_assertPKcS0_i+0x4a
Qt5Core.dll!ZN18QAbstractItemModel18beginRemoveColumnsERK11QModelIndexii+0xe0
liboctgui-5.dll!ZN6octave21variable_editor_model19change_display_sizeEiiii+0xf9
liboctgui-5.dll!ZN6octave21variable_editor_model11update_dataERK12octave_value+0x1c6
liboctgui-5.dll!ZN6octave21variable_editor_model18qt_static_metacallEP7QObjectN11QMetaObject4CallEiPPv+0xee
Qt5Core.dll!ZN14QMetaCallEvent13placeMetaCallEP7QObject+0x6d
Qt5Core.dll!ZN7QObject5eventEP6QEvent+0x1ad
Qt5Widgets.dll!ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0x86
Qt5Widgets.dll!ZN12QApplication6notifyEP7QObjectP6QEvent+0x4ec
liboctgui-5.dll!ZN6octave19octave_qapplication6notifyEP7QObjectP6QEvent+0xe
Qt5Core.dll!ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent+0x74
Qt5Core.dll!ZN16QCoreApplication9sendEventEP7QObjectP6QEvent+0x18
Qt5Core.dll!ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData+0x26e
Qt5Core.dll!ZN21QEventDispatcherWin3216sendPostedEventsEv+0x1b
qwindows.dll!qt_plugin_instance+0x2d3e
Qt5Core.dll!ZN21QEventDispatcherWin3213processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE+0x67
qwindows.dll!qt_plugin_instance+0x2d25
Qt5Core.dll!ZN10QEventLoop13processEventsE6QFlagsINS_17ProcessEventsFlagEE+0x2d
Qt5Core.dll!ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE+0x162
Qt5Core.dll!ZN16QCoreApplication4execEv+0x86
Qt5Gui.dll!ZN15QGuiApplication4execEv+0x19
Qt5Widgets.dll!ZN12QApplication4execEv+0xa
liboctgui-5.dll!ZN6octave15gui_application7executeEv+0x30
octave-gui.exe!main+0x187
octave-gui.exe+0x13b4
octave-gui.exe+0x150b
KERNEL32.DLL!BaseThreadInitThunk+0x14
ntdll.dll!RtlUserThreadStart+0x21


I deduce from that stacktrace, that the variable editor seems to be the
culprit.

What have I done to trigger this?

I was debugging an Octave script. The variable editor tab was open with two
variables displayed (Each approximately 7500x3 elements)
The I pressed the F10 key to advance the script by one line. This led directly
to the crash.

I was observing some similar crashes in the last few weeks, but I was not able
to directly reproduce the crashes.




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