nativeParent of the size grip is 0 in WidgetBackingStore::markDirtyOnScreen() at src\widgets\kernel\qwidgetbackingstore.cpp:720 . 0 Id: 2d2c.3f10 Suspend: 1 Teb: 00000036`8c41d000 Unfrozen Child-SP RetAddr Call Site 00000036`8c6f94f8 00007fff`6d01cdd3 Qt5Widgetsd!QScopedPointer >::operator->(void)+0xa [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\tools\qscopedpointer.h @ 118] 00000036`8c6f9500 00007fff`6d02ddaa Qt5Widgetsd!qGetPtrHelper > >(class QScopedPointer > * ptr = 0x00000000`00000008)+0x13 [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\global\qglobal.h @ 1038] 00000036`8c6f9530 00007fff`6d066f71 Qt5Widgetsd!QWidget::d_func(void)+0x1a [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidget.h @ 131] 00000036`8c6f9560 00007fff`6d0ba734 Qt5Widgetsd!QWidgetBackingStore::markDirtyOnScreen(class QRegion * region = 0x00000036`8c6f9658, class QWidget * widget = 0x0000020e`c8b29f10, class QPoint * topLevelOffset = 0x00000036`8c6f9ac8)+0x131 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidgetbackingstore.cpp @ 727] 00000036`8c6f95f0 00007fff`6d0bb1bb Qt5Widgetsd!QWidgetPrivate::drawWidget(class QPaintDevice * pdev = 0x0000020e`c36b2960, class QRegion * rgn = 0x00000036`8c6f9a58, class QPoint * offset = 0x00000036`8c6f9ac8, int flags = 0n4, class QPainter * sharedPainter = 0x00000000`00000000, class QWidgetBackingStore * backingStore = 0x0000020e`c36c6de0)+0xd74 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidget.cpp @ 5646] 00000036`8c6f99e0 00007fff`6d0babe3 Qt5Widgetsd!QWidgetPrivate::paintSiblingsRecursive(class QPaintDevice * pdev = 0x0000020e`c36b2960, class QList * siblings = 0x0000020e`c8aba0b8, int index = 0n0, class QRegion * rgn = 0x00000036`8c6fa028, class QPoint * offset = 0x00000036`8c6fa238, int flags = 0n4, class QPainter * sharedPainter = 0x00000000`00000000, class QWidgetBackingStore * backingStore = 0x0000020e`c36c6de0)+0x52b [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidget.cpp @ 5834] 00000036`8c6f9b20 00007fff`6d066019 Qt5Widgetsd!QWidgetPrivate::drawWidget(class QPaintDevice * pdev = 0x0000020e`c36b2960, class QRegion * rgn = 0x00000036`8c6fa028, class QPoint * offset = 0x00000036`8c6fa238, int flags = 0n5, class QPainter * sharedPainter = 0x00000000`00000000, class QWidgetBackingStore * backingStore = 0x0000020e`c36c6de0)+0x1223 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidget.cpp @ 5692] 00000036`8c6f9f10 00007fff`6d062d34 Qt5Widgetsd!QWidgetBackingStore::doSync(void)+0x1459 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidgetbackingstore.cpp @ 1427] 00000036`8c6fa480 00007fff`6d0bd5d3 Qt5Widgetsd!QWidgetBackingStore::sync(class QWidget * exposedWidget = 0x0000020e`c8b04f10, class QRegion * exposedRegion = 0x00000036`8c6fb570)+0x314 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidgetbackingstore.cpp @ 1180] 00000036`8c6fa550 00007fff`6d100a53 Qt5Widgetsd!QWidgetPrivate::syncBackingStore(class QRegion * region = 0x00000036`8c6fb570)+0x63 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidget.cpp @ 1960] 00000036`8c6fa590 00007fff`6d0fd73c Qt5Widgetsd!QWidgetWindow::handleExposeEvent(class QExposeEvent * event = 0x00000036`8c6fb558)+0x233 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidgetwindow.cpp @ 996] 00000036`8c6fa620 00007fff`6d0486e2 Qt5Widgetsd!QWidgetWindow::event(class QEvent * event = 0x00000036`8c6fb558)+0x37c [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qwidgetwindow.cpp @ 337] 00000036`8c6fa6c0 00007fff`6d0428b7 Qt5Widgetsd!QApplicationPrivate::notify_helper(class QObject * receiver = 0x0000020e`c3748800, class QEvent * e = 0x00000036`8c6fb558)+0x1a2 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qapplication.cpp @ 3700] 00000036`8c6fa720 00007fff`6e08a970 Qt5Widgetsd!QApplication::notify(class QObject * receiver = 0x0000020e`c3748800, class QEvent * e = 0x00000036`8c6fb558)+0x6d7 [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qapplication.cpp @ 3056] 00000036`8c6fb440 00007fff`6e08a80b Qt5Cored!QCoreApplication::notifyInternal2(class QObject * receiver = 0x0000020e`c3748800, class QEvent * event = 0x00000036`8c6fb558)+0x120 [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\kernel\qcoreapplication.cpp @ 1088] 00000036`8c6fb4c0 00007fff`6af4d081 Qt5Cored!QCoreApplication::sendSpontaneousEvent(class QObject * receiver = 0x0000020e`c3748800, class QEvent * event = 0x00000036`8c6fb558)+0x3b [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\kernel\qcoreapplication.cpp @ 1489] 00000036`8c6fb4f0 00007fff`6af4c61f Qt5Guid!QGuiApplicationPrivate::processExposeEvent(class QWindowSystemInterfacePrivate::ExposeEvent * e = 0x0000020e`c36c8570)+0x191 [c:\dev\5-vs17-512\qt-512\qtbase\src\gui\kernel\qguiapplication.cpp @ 3078] 00000036`8c6fb5c0 00007fff`6af16882 Qt5Guid!QGuiApplicationPrivate::processWindowSystemEvent(class QWindowSystemInterfacePrivate::WindowSystemEvent * e = 0x0000020e`c36c8570)+0x21f [c:\dev\5-vs17-512\qt-512\qtbase\src\gui\kernel\qguiapplication.cpp @ 1908] 00000036`8c6fb660 00007fff`6af16ace Qt5Guid!QWindowSystemInterface::sendWindowSystemEvents(class QFlags flags = class QFlags)+0xe2 [c:\dev\5-vs17-512\qt-512\qtbase\src\gui\kernel\qwindowsysteminterface.cpp @ 1157] 00000036`8c6fb6e0 00007fff`6f63b218 Qt5Guid!QWindowSystemInterface::flushWindowSystemEvents(class QFlags flags = class QFlags)+0x18e [c:\dev\5-vs17-512\qt-512\qtbase\src\gui\kernel\qwindowsysteminterface.cpp @ 1117] 00000036`8c6fb790 00007fff`6f6629c8 qwindowsd!QWindowsWindow::handleWmPaint(struct HWND__ * hwnd = 0x00000000`050c0738 730+285+246x269 'Qt5QWindowIcon', unsigned int message = 0xf, unsigned int64 __formal = 0, int64 __formal = 0n0)+0x228 [c:\dev\5-vs17-512\qt-512\qtbase\src\plugins\platforms\windows\qwindowswindow.cpp @ 2033] 00000036`8c6fb880 00007fff`6f658de2 qwindowsd!QWindowsContext::windowsProc(struct HWND__ * hwnd = 0x00000000`050c0738 730+285+246x269 'Qt5QWindowIcon', unsigned int message = 0xf, QtWindows::WindowsEventType et = ExposeEvent (0n65537), unsigned int64 wParam = 0, int64 lParam = 0n0, int64 * result = 0x00000036`8c6fc208, class QWindowsWindow ** platformWindowPtr = 0x00000036`8c6fc1f8)+0x1128 [c:\dev\5-vs17-512\qt-512\qtbase\src\plugins\platforms\windows\qwindowscontext.cpp @ 1231] 00000036`8c6fc1b0 00007fff`c1c463ed qwindowsd!qWindowsWndProc(struct HWND__ * hwnd = 0x00000000`050c0738 730+285+246x269 'Qt5QWindowIcon', unsigned int message = 0xf, unsigned int64 wParam = 0, int64 lParam = 0n0)+0x112 [c:\dev\5-vs17-512\qt-512\qtbase\src\plugins\platforms\windows\qwindowscontext.cpp @ 1593] 00000036`8c6fc3f0 00007fff`c1c45fbc USER32!UserCallWinProcCheckWow+0x2bd 00000036`8c6fc580 00007fff`c1c52753 USER32!DispatchClientMessage+0x9c 00000036`8c6fc5e0 00007fff`c2dbfe14 USER32!_fnDWORD+0x33 00000036`8c6fc640 00007fff`c0231764 ntdll!KiUserCallbackDispatcherContinue 00000036`8c6fc6c8 00007fff`c1c45ecc win32u!NtUserDispatchMessage+0x14 00000036`8c6fc6d0 00007fff`6e156143 USER32!DispatchMessageWorker+0x2cc 00000036`8c6fc750 00007fff`6f71d294 Qt5Cored!QEventDispatcherWin32::processEvents(class QFlags flags = class QFlags)+0x5c3 [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\kernel\qeventdispatcher_win.cpp @ 643] 00000036`8c6ff910 00007fff`6e08477d qwindowsd!QWindowsGuiEventDispatcher::processEvents(class QFlags flags = class QFlags)+0x34 [c:\dev\5-vs17-512\qt-512\qtbase\src\platformsupport\eventdispatchers\qwindowsguieventdispatcher.cpp @ 74] 00000036`8c6ff950 00007fff`6e0849cf Qt5Cored!QEventLoop::processEvents(class QFlags flags = class QFlags)+0x6d [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\kernel\qeventloop.cpp @ 139] 00000036`8c6ff9a0 00007fff`6e0882ca Qt5Cored!QEventLoop::exec(class QFlags flags = class QFlags)+0x19f [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\kernel\qeventloop.cpp @ 225] 00000036`8c6ffa60 00007fff`6af46108 Qt5Cored!QCoreApplication::exec(void)+0x16a [c:\dev\5-vs17-512\qt-512\qtbase\src\corelib\kernel\qcoreapplication.cpp @ 1389] 00000036`8c6ffb20 00007fff`6d0421ca Qt5Guid!QGuiApplication::exec(void)+0x18 [c:\dev\5-vs17-512\qt-512\qtbase\src\gui\kernel\qguiapplication.cpp @ 1785] 00000036`8c6ffb50 00007ff7`a89d29a8 Qt5Widgetsd!QApplication::exec(void)+0xa [c:\dev\5-vs17-512\qt-512\qtbase\src\widgets\kernel\qapplication.cpp @ 2857] 00000036`8c6ffb80 00007ff7`a89d66b5 qtbug81315!main(int argc = 0n1, char ** argv = 0x0000020e`c17027d0)+0xd8 [c:\dev\projects\qtbug81315\main.cpp @ 19] 00000036`8c6ffc50 00007ff7`a89d41dd qtbug81315!WinMain(struct HINSTANCE__ * __formal = 0x00007ff7`a89d0000, struct HINSTANCE__ * __formal = 0x00000000`00000000, char * __formal = 0x0000020e`c16f93b3 "", int __formal = 0n10)+0xf5 [c:\dev\5-vs17-512\qt-512\qtbase\src\winmain\qtmain_win.cpp @ 97] 00000036`8c6ffcd0 00007ff7`a89d408e qtbug81315!invoke_main(void)+0x2d [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 107] 00000036`8c6ffd10 00007ff7`a89d3f4e qtbug81315!__scrt_common_main_seh(void)+0x12e [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 288] 00000036`8c6ffd80 00007ff7`a89d4269 qtbug81315!__scrt_common_main(void)+0xe [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl @ 331] 00000036`8c6ffdb0 00007fff`c1587bd4 qtbug81315!WinMainCRTStartup(void)+0x9 [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_winmain.cpp @ 17] 00000036`8c6ffde0 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8c6ffe10 00000000`00000000 ntdll!RtlUserThreadStart+0x21 1 Id: 2d2c.3fb4 Suspend: 1 Teb: 00000036`8c41f000 Unfrozen Child-SP RetAddr Call Site 00000036`8c7ff9e8 00007fff`c2d54060 ntdll!NtWaitForWorkViaWorkerFactory+0x14 00000036`8c7ff9f0 00007fff`c1587bd4 ntdll!TppWorkerThread+0x300 00000036`8c7ffdb0 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8c7ffde0 00000000`00000000 ntdll!RtlUserThreadStart+0x21 2 Id: 2d2c.16f0 Suspend: 1 Teb: 00000036`8c421000 Unfrozen Child-SP RetAddr Call Site 00000036`8c8ffa58 00007fff`c2d54060 ntdll!NtWaitForWorkViaWorkerFactory+0x14 00000036`8c8ffa60 00007fff`c1587bd4 ntdll!TppWorkerThread+0x300 00000036`8c8ffe20 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8c8ffe50 00000000`00000000 ntdll!RtlUserThreadStart+0x21 3 Id: 2d2c.5e68 Suspend: 1 Teb: 00000036`8c423000 Unfrozen Child-SP RetAddr Call Site 00000036`8c9ff718 00007fff`c2d54060 ntdll!NtWaitForWorkViaWorkerFactory+0x14 00000036`8c9ff720 00007fff`c1587bd4 ntdll!TppWorkerThread+0x300 00000036`8c9ffae0 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8c9ffb10 00000000`00000000 ntdll!RtlUserThreadStart+0x21 4 Id: 2d2c.39d0 Suspend: 1 Teb: 00000036`8c425000 Unfrozen Child-SP RetAddr Call Site 00000036`8caff5f8 00007fff`bff77ff7 ntdll!NtWaitForMultipleObjects+0x14 00000036`8caff600 00007fff`c2449d1b KERNELBASE!WaitForMultipleObjectsEx+0x107 00000036`8caff900 00007fff`c2449ba0 combase!WaitCoalesced(void * timer = 0x00000000`000002fc, unsigned int cHandlesOuter = 0, void ** pHandles = 0x00000000`00000000, unsigned long delayInMs = , unsigned long tolerableDelayInMs = 0xfa0, int alertable = 0n0, unsigned long * waitResult = 0x00000036`8caffbe0)+0x9f [onecore\com\published\comutils\coalescedwait.cxx @ 72] 00000036`8caffb90 00007fff`c24499cc combase!CROIDTable::WorkerThreadLoop(void * param = 0x00000000`00000000)+0x50 [onecore\com\combase\dcomrem\refcache.cxx @ 1682] 00000036`8caffbe0 00007fff`c244994c combase!CRpcThread::WorkerLoop(void)+0x4c [onecore\com\combase\dcomrem\threads.cxx @ 283] 00000036`8caffc40 00007fff`c1587bd4 combase!CRpcThreadCache::RpcWorkerThreadEntry(void * param = 0x0000020e`c1760690)+0x7c [onecore\com\combase\dcomrem\threads.cxx @ 77] 00000036`8caffc70 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8caffca0 00000000`00000000 ntdll!RtlUserThreadStart+0x21 5 Id: 2d2c.3ba8 Suspend: 1 Teb: 00000036`8c427000 Unfrozen Child-SP RetAddr Call Site 00000036`8cbff708 00007fff`c2d54060 ntdll!NtWaitForWorkViaWorkerFactory+0x14 00000036`8cbff710 00007fff`c1587bd4 ntdll!TppWorkerThread+0x300 00000036`8cbffad0 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8cbffb00 00000000`00000000 ntdll!RtlUserThreadStart+0x21 6 Id: 2d2c.4c5c Suspend: 1 Teb: 00000036`8c429000 Unfrozen Child-SP RetAddr Call Site 00000036`8ccffab8 00007fff`c2d54060 ntdll!NtWaitForWorkViaWorkerFactory+0x14 00000036`8ccffac0 00007fff`c1587bd4 ntdll!TppWorkerThread+0x300 00000036`8ccffe80 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8ccffeb0 00000000`00000000 ntdll!RtlUserThreadStart+0x21 7 Id: 2d2c.46c0 Suspend: 1 Teb: 00000036`8c42b000 Unfrozen Child-SP RetAddr Call Site 00000036`8cdff998 00007fff`bdb22791 ntdll!NtWaitForMultipleObjects+0x14 00000036`8cdff9a0 00007fff`c1587bd4 WINMM!timeThread+0x91 00000036`8cdffb20 00007fff`c2d8ced1 KERNEL32!BaseThreadInitThunk+0x14 00000036`8cdffb50 00000000`00000000 ntdll!RtlUserThreadStart+0x21