P3: Somewhat important This was originally encountered with https://codereview.qt-project.org/c/qt/qtdeclarative/+/519962, but apparently it can be reproduced with this old widgets example I had lying around:
#include <QtWidgets> int main(int argc, char *argv[]) { QApplication app(argc, argv); QMainWindow mainWindow; QWidget *centralWidget = new QWidget; auto layout = new QHBoxLayout(centralWidget); centralWidget->setLayout(layout); auto *buttonGroup = new QButtonGroup(centralWidget); auto *button1 = new QPushButton("Button 1", centralWidget); button1->setCheckable(true); buttonGroup->addButton(button1); layout->addWidget(button1); auto *button2 = new QPushButton("Button 2", centralWidget); button2->setCheckable(true); buttonGroup->addButton(button2); layout->addWidget(button2); auto *slider = new QSlider(centralWidget); layout->addWidget(slider); mainWindow.setCentralWidget(centralWidget); mainWindow.resize(400, 400); mainWindow.show(); return app.exec(); }
I added a breakpoint to qtbase\src\plugins\platforms\windows\qwindowsmenu.cpp:783 and started debugging, and execution stopped here:
1 NtMapViewOfSection ntdll 0x7ff9be1af874 2 LdrControlFlowGuardEnforced ntdll 0x7ff9be13c4cc 3 LdrControlFlowGuardEnforced ntdll 0x7ff9be13c0ca 4 LdrControlFlowGuardEnforced ntdll 0x7ff9be13c254 5 RtlQueryPerformanceCounter ntdll 0x7ff9be12070f 6 RtlQueryPerformanceCounter ntdll 0x7ff9be1210f0 7 RtlQueryPerformanceCounter ntdll 0x7ff9be120ebf 8 RtlImageRvaToSection ntdll 0x7ff9be1388d4 9 RtlUnicodeToCustomCPN ntdll 0x7ff9be128cac 10 LdrLoadDll ntdll 0x7ff9be13a25a 11 LoadLibraryExW KERNELBASE 0x7ff9bb6e6452 12 QLibraryPrivate::load_sys qlibrary_win.cpp 63 0x7ff8b269a27e 13 QLibraryPrivate::load qlibrary.cpp 530 0x7ff8b268b9e2 14 QLibraryPrivate::loadPlugin qlibrary.cpp 582 0x7ff8b268bcfc 15 QLibraryPrivate::pluginInstance qlibrary.cpp 503 0x7ff8b268c362 16 QFactoryLoader::instance qfactoryloader.cpp 374 0x7ff8b210ab86 17 qLoadPlugin<QPlatformIntegration,QPlatformIntegrationPlugin,QList<QString> const &,int &,char * * &> qfactoryloader_p.h 97 0x7ff8af7fbb33 18 QPlatformIntegrationFactory::create qplatformintegrationfactory.cpp 24 0x7ff8af7fb587 19 init_platform qguiapplication.cpp 1249 0x7ff8af757946 20 QGuiApplicationPrivate::createPlatformIntegration qguiapplication.cpp 1533 0x7ff8af74cb37 21 QGuiApplicationPrivate::createEventDispatcher qguiapplication.cpp 1555 0x7ff8af74cd47 22 QCoreApplicationPrivate::init qcoreapplication.cpp 906 0x7ff8b1fdf2c7 23 QGuiApplicationPrivate::init qguiapplication.cpp 1582 0x7ff8af74b667 24 QGuiApplication::QGuiApplication qguiapplication.cpp 644 0x7ff8af748065 25 main main.cpp 10 0x7ff79c57297a 26 qtEntryPoint qtentrypoint_win.cpp 50 0x7ff79c578197 27 WinMain qtentrypoint_win.cpp 60 0x7ff79c577f9e 28 invoke_main exe_common.inl 107 0x7ff79c574aa2 29 __scrt_common_main_seh exe_common.inl 288 0x7ff79c57498e 30 __scrt_common_main exe_common.inl 331 0x7ff79c57484e 31 WinMainCRTStartup exe_winmain.cpp 17 0x7ff79c574b3e 32 BaseThreadInitThunk KERNEL32 0x7ff9bcea257d 33 RtlUserThreadStart ntdll 0x7ff9be16aa58
Qt Creator 11.0.3 Based on Qt 6.4.3 (MSVC 2019, x86_64) Built on Sep 27 2023 06:38:22 From revision 68359f96a9