Windows: dynamically creating a ComboBox with a ShaderEffect delegate triggers an assert

1  qt_message_fatal                                       qlogging.cpp                   1872 0x7fff626db55b 
2  QMessageLogger::fatal                                  qlogging.cpp                   887  0x7fff626d9d32 
3  qt_assert                                              qglobal.cpp                    3201 0x7fff626caa4b 
4  QQmlData::ensurePropertyCache                          qqmldata_p.h                   280  0x7fff642cff92 
5  QQuickOpenGLShaderEffectCommon::connectPropertySignals qquickopenglshadereffect.cpp   248  0x7fff61ae9c7a 
6  QQuickOpenGLShaderEffectCommon::updateShader           qquickopenglshadereffect.cpp   440  0x7fff61aeb338 
7  QQuickOpenGLShaderEffect::maybeUpdateShaders           qquickopenglshadereffect.cpp   970  0x7fff61aedf8d 
8  QQuickShaderEffectPrivate::updatePolish                qquickshadereffect.cpp         870  0x7fff61addf74 
9  QQuickWindowPrivate::polishItems                       qquickwindow.cpp               310  0x7fff618ca982 
10 QSGWindowsRenderLoop::renderWindow                     qsgwindowsrenderloop.cpp       468  0x7fff6181986c 
11 QSGWindowsRenderLoop::render                           qsgwindowsrenderloop.cpp       391  0x7fff618192aa 
12 QSGWindowsRenderLoop::exposureChanged                  qsgwindowsrenderloop.cpp       300  0x7fff61818c53 
13 QQuickWindow::exposeEvent                              qquickwindow.cpp               230  0x7fff618bd7df 
14 QWindow::event                                         qwindow.cpp                    2310 0x7fff6352fe2b 
15 QQuickWindow::event                                    qquickwindow.cpp               1674 0x7fff618bddc0 
16 QCoreApplicationPrivate::notify_helper                 qcoreapplication.cpp           1220 0x7fff62ac486e 
17 doNotify                                               qcoreapplication.cpp           1150 0x7fff62ac60d8 
18 QCoreApplication::notify                               qcoreapplication.cpp           1137 0x7fff62ac1e41 
19 QGuiApplication::notify                                qguiapplication.cpp            1792 0x7fff6350e0b4 
20 QCoreApplication::notifyInternal2                      qcoreapplication.cpp           1060 0x7fff62ac38b6 
21 QCoreApplication::sendSpontaneousEvent                 qcoreapplication.cpp           1463 0x7fff62ac375b 
22 QGuiApplicationPrivate::processExposeEvent             qguiapplication.cpp            3067 0x7fff63514592 
23 QGuiApplicationPrivate::processWindowSystemEvent       qguiapplication.cpp            1903 0x7fff63513bbc 
24 QWindowSystemInterface::sendWindowSystemEvents         qwindowsysteminterface.cpp     1077 0x7fff634e1f95 
25 QWindowSystemInterface::flushWindowSystemEvents        qwindowsysteminterface.cpp     1037 0x7fff634e21c2 
26 QWindowsWindow::handleWmPaint                          qwindowswindow.cpp             1902 0x7fff621faf2c 
27 QWindowsContext::windowsProc                           qwindowscontext.cpp            1219 0x7fff6221f087 
28 qWindowsWndProc                                        qwindowscontext.cpp            1567 0x7fff622158d5 
29 CallWindowProcW                                        USER32                              0x7fffb4d5b85d 
30 CallWindowProcW                                        USER32                              0x7fffb4d5b40b 
31 rx::SurfaceWindowProc                                  SurfaceD3D.cpp                 280  0x7fff603bf2f0 
32 CallWindowProcW                                        USER32                              0x7fffb4d5b85d 
33 CallWindowProcW                                        USER32                              0x7fffb4d5b54c 
34 GetTopWindow                                           USER32                              0x7fffb4d719c3 
35 KiUserCallbackDispatcher                               ntdll                               0x7fffb6e33d44 
36 NtUserDispatchMessage                                  win32u                              0x7fffb3491744 
37 DispatchMessageW                                       USER32                              0x7fffb4d5b272 
38 QEventDispatcherWin32::processEvents                   qeventdispatcher_win.cpp       640  0x7fff62b84f68 
39 QWindowsGuiEventDispatcher::processEvents              qwindowsguieventdispatcher.cpp 74   0x7fff622d3004 
40 QEventLoop::processEvents                              qeventloop.cpp                 139  0x7fff62abdae3 
41 QEventLoop::exec                                       qeventloop.cpp                 225  0x7fff62abdd1e 
42 QCoreApplication::exec                                 qcoreapplication.cpp           1363 0x7fff62ac13af 
43 QGuiApplication::exec                                  qguiapplication.cpp            1780 0x7fff6350e048 
44 main                                                   main.cpp                       13   0x7ff71b3c29ad 
45 WinMain                                                qtmain_win.cpp                 97   0x7ff71b3c60c5 
46 invoke_main                                            exe_common.inl                 107  0x7ff71b3c48cd 
47 __scrt_common_main_seh                                 exe_common.inl                 283  0x7ff71b3c47c7 
48 __scrt_common_main                                     exe_common.inl                 326  0x7ff71b3c468e 
49 WinMainCRTStartup                                      exe_winmain.cpp                17   0x7ff71b3c4959 
50 BaseThreadInitThunk                                    KERNEL32                            0x7fffb4801fe4 
51 RtlUserThreadStart                                     ntdll                               0x7fffb6dfcb31