QQuickWidget::grabFramebuffer crashes on change of Windows Geometry in Windows Store Desktop App

Our application uses WebEngine and one version of our software is also packaged via the Windows Desktop Bridge as a Windows Store application.

According to the Windows Store Health Failure Reports, one of our more common crashes (~24 %) is related to a call to QQuickWidget::grabFramebuffer in response to a windows geometry change. It appears this error is more common in the specific scenario of the Windows Store Desktop App, since our regular desktop app crash reports seem not to show this.

Since these errors happen on end customer systems, we rarely have the ability to actually reproduce these errors ourself.

We have stacktraces for a LENOVO-20FQS0GF00, LENOVO-F0DT002JGE and a Microsoft Corporation-Surface Pro 4 device via the Windows Store Health Failure Reports.

Example Stack Trace

Frame Image Function Offset
0 ucrtbase.dll abort 0x000000000000004E
1 CWCore.dll CWLogMessageHandler::handleLogMessage 0x0000000000000465
2 Qt5Core.dll qt_message_output 0x0000000000000138
3 Qt5Core.dll qt_logging_to_console 0x00000000000000BF
4 Qt5Core.dll QMessageLogger::fatal 0x000000000000003B
5 Qt5QuickWidgets.dll QQuickWidget::grabFramebuffer 0x00000000000001FE
6 Qt5QuickWidgets.dll QQuickWidget::continueExecute 0x0000000000000517
7 Qt5QuickWidgets.dll QQuickWidget::resizeEvent 0x0000000000000181
8 Qt5WebEngineWidgets.dll QWebEngineView::zoomFactor 0x000000000000119F
9 Qt5Widgets.dll QWidget::event 0x0000000000000606
10 Qt5Widgets.dll QApplicationPrivate::notify_helper 0x0000000000000140
11 Qt5Widgets.dll QApplication::notify 0x0000000000001A77
12 CWGUIWidgets.dll CWApplication::notify 0x0000000000000028
13 Qt5Core.dll QCoreApplication::notifyInternal2 0x00000000000000B9
14 Qt5Widgets.dll QWidgetPrivate::sendPendingMoveAndResizeEvents 0x0000000000000114
15 Qt5Widgets.dll QWidgetPrivate::show_helper 0x000000000000002A
16 Qt5Widgets.dll QWidgetPrivate::showChildren 0x0000000000000133
17 Qt5Widgets.dll QWidgetPrivate::show_helper 0x000000000000004A
18 Qt5Widgets.dll QWidget::setVisible 0x0000000000000288
19 Qt5Widgets.dll QWidgetPrivate::showChildren 0x000000000000013D
20 Qt5Widgets.dll QWidgetPrivate::show_helper 0x000000000000004A
21 Qt5Widgets.dll QWidgetPrivate::showChildren 0x0000000000000133
22 Qt5Widgets.dll QWidgetPrivate::show_helper 0x000000000000004A
23 Qt5Widgets.dll QWidget::setVisible 0x0000000000000288
24 Qt5Widgets.dll QWidgetPrivate::showChildren 0x000000000000013D
25 Qt5Widgets.dll QWidgetPrivate::show_helper 0x000000000000004A
26 Qt5Widgets.dll QWidget::setVisible 0x0000000000000288
27 CWGUIWidgets.dll CWGUISettings::restoreWindowGeometry 0x0000000000000052
28 Mein CEWE FOTOBUCH.exe null 0x00000000001688C5
29 null null 0x0000000000000000
30 unknown.dll noop 0x0000000000000000
31 null null 0x0000000000000000
32 Mein CEWE FOTOBUCH.exe null 0x0000000000168375
33 CWModelBase.dll CWShadowConfig::NoShadow 0x0000000000000140
34 null null 0x0000000000000000
35 null null 0x0000000000000000
36 Mein CEWE FOTOBUCH.exe null 0x0000000000280AE0

Kai Köhne suggested we report this here.