Workaround for https://bugreports.qt.io/browse/QTBUG-62216 by m-roberts · Pull Request #19 · qt/qtbase

m-roberts · 2018-03-08T18:10:56Z

No description provided.

ossilator · 2018-03-14T10:40:41Z

mkspecs/devices/linux-rasp-pi2-g++/qmake.conf

 include(../common/linux_device_pre.conf)

-QMAKE_RPATHLINKDIR_POST += $$[QT_SYSROOT]/opt/vc/lib
+QMAKE_LFLAGS           += -Wl,-rpath-link,$$[QT_SYSROOT]/opt/vc/lib


this one looks seriously fishy.

ossilator · 2018-03-14T10:41:48Z

i guess this isn't really meant to be merged anyway, but the proper way to submit patches for qt is described in https://wiki.qt.io/Qt_Contribution_Guidelines

We can't guarantee that the library didn't define Objective-C classes that still have lingering references, resulting in warnings such as: Attempt to use unknown class 0x10e52e110. And possibly crashes such as: thread #1, queue = 'com.apple.main-thread' frame #0: 0x00007fff203829ee libsystem_kernel.dylib`__ulock_wait + 10 frame #1: 0x00007fff203fa0c5 libsystem_platform.dylib`_os_unfair_lock_lock_slow + 162 frame #2: 0x00007fff2026226b libobjc.A.dylib`unmap_image + 85 frame #3: 0x000000010001e11f dyld`dyld::removeImage(ImageLoader*) + 557 frame #4: 0x000000010002291d dyld`dyld::garbageCollectImages() + 956 frame #5: 0x000000010002e35d dyld`dlclose + 191 frame #6: 0x00007fff203cf1c9 libdyld.dylib`dlclose + 183 frame #7: 0x0000000103f9f2f1 libQt6Core_debug.6.dylib`QLibraryPrivate::unload_sys(this=0x000000011ba2c7d0) at qlibrary_unix.cpp:294:9 frame #8: 0x0000000103f93f3f libQt6Core_debug.6.dylib`QLibraryPrivate::unload(this=0x000000011ba2c7d0, flag=UnloadSys) at qlibrary.cpp:614:36 frame #9: 0x0000000103f971fb libQt6Core_debug.6.dylib`QLibraryStore::cleanup() at qlibrary.cpp:425:22 frame #10: 0x0000000103f970f9 libQt6Core_debug.6.dylib`qlibraryCleanup() at qlibrary.cpp:447:5 frame #11: 0x0000000103f970d1 libQt6Core_debug.6.dylib`(anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_(this=0x00000001041edd38) at qlibrary.cpp:449:1 frame #12: 0x0000000103f930f5 libQt6Core_debug.6.dylib`(anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_(this=0x00000001041edd38) at qlibrary.cpp:449:1 frame #13: 0x00007fff202e5d25 libsystem_c.dylib`__cxa_finalize_ranges + 316 frame #14: 0x00007fff202e6010 libsystem_c.dylib`exit + 53 frame #15: 0x00007fff203d1f44 libdyld.dylib`start + 8 frame #16: 0x00007fff203d1f3d libdyld.dylib`start + 1 thread #5, queue = 'com.apple.root.user-interactive-qos', stop reason = signal SIGABRT frame #0: 0x00007fff203a356e libsystem_kernel.dylib`__abort_with_payload + 10 frame #1: 0x00007fff203a4fbd libsystem_kernel.dylib`abort_with_payload_wrapper_internal + 80 frame #2: 0x00007fff203a4f6d libsystem_kernel.dylib`abort_with_reason + 19 frame #3: 0x00007fff202749e3 libobjc.A.dylib`_objc_fatalv(unsigned long long, unsigned long long, char const*, __va_list_tag*) + 114 frame #4: 0x00007fff20274971 libobjc.A.dylib`_objc_fatal(char const*, ...) + 135 frame #5: 0x00007fff20255ccb libobjc.A.dylib`lookUpImpOrForward + 881 frame #6: 0x00007fff2025539b libobjc.A.dylib`_objc_msgSend_uncached + 75 frame #7: 0x00007fff22f368d6 AppKit`-[_NSWindowTransformAnimation setCurrentProgress:] + 42 frame #8: 0x00007fff22f37a8a AppKit`__55-[NSAnimation(NSInternal) _advanceTimeWithDisplayLink:]_block_invoke + 31 frame #9: 0x00007fff22d0774f AppKit`NSPerformVisuallyAtomicChange + 132 frame #10: 0x00007fff22f379dc AppKit`-[NSAnimation(NSInternal) _advanceTimeWithDisplayLink:] + 172 frame #11: 0x00007fff22e9a184 AppKit`-[NSScreenDisplayLink _fire] + 180 frame #12: 0x00007fff2362f0b4 AppKit`___NSRunLoopTimerCreateWithHandler_block_invoke + 34 frame #13: 0x00007fff204c6be9 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20 frame #14: 0x00007fff204c66dd CoreFoundation`__CFRunLoopDoTimer + 927 frame #15: 0x00007fff204c623a CoreFoundation`__CFRunLoopDoTimers + 307 frame #16: 0x00007fff204ace13 CoreFoundation`__CFRunLoopRun + 1988 frame #17: 0x00007fff204abf8c CoreFoundation`CFRunLoopRunSpecific + 563 frame #18: 0x00007fff2123d607 Foundation`-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 frame #19: 0x00007fff22f378f0 AppKit`-[NSAnimation(NSInternal) _runBlocking] + 453 frame #20: 0x00007fff22f376ae AppKit`__42-[NSAnimation(NSInternal) _runInNewThread]_block_invoke + 97 frame #21: 0x0000000104edb032 libdispatch.dylib`_dispatch_call_block_and_release + 12 frame #22: 0x0000000104edc264 libdispatch.dylib`_dispatch_client_callout + 8 frame #23: 0x0000000104ef04ac libdispatch.dylib`_dispatch_root_queue_drain + 828 frame #24: 0x0000000104ef0d3f libdispatch.dylib`_dispatch_worker_thread2 + 127 frame #25: 0x0000000104f7eac7 libsystem_pthread.dylib`_pthread_wqthread + 244 frame #26: 0x0000000104f7dae3 libsystem_pthread.dylib`start_wqthread + 15 This has been e.g. observed when a QNSWindow isn't closed and released at application quit as expected. Although that is a corner case that shouldn't happen, the general case is still valid. Fixes: QTBUG-96208 Pick-to: 6.2 5.15 Change-Id: I6c9d220e6f5389707baf7ae983f3156e8e51c316 Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io> Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

We can't guarantee that the library didn't define Objective-C classes that still have lingering references, resulting in warnings such as: Attempt to use unknown class 0x10e52e110. And possibly crashes such as: thread #1, queue = 'com.apple.main-thread' frame #0: 0x00007fff203829ee libsystem_kernel.dylib`__ulock_wait + 10 frame #1: 0x00007fff203fa0c5 libsystem_platform.dylib`_os_unfair_lock_lock_slow + 162 frame #2: 0x00007fff2026226b libobjc.A.dylib`unmap_image + 85 frame #3: 0x000000010001e11f dyld`dyld::removeImage(ImageLoader*) + 557 frame #4: 0x000000010002291d dyld`dyld::garbageCollectImages() + 956 frame #5: 0x000000010002e35d dyld`dlclose + 191 frame #6: 0x00007fff203cf1c9 libdyld.dylib`dlclose + 183 frame #7: 0x0000000103f9f2f1 libQt6Core_debug.6.dylib`QLibraryPrivate::unload_sys(this=0x000000011ba2c7d0) at qlibrary_unix.cpp:294:9 frame #8: 0x0000000103f93f3f libQt6Core_debug.6.dylib`QLibraryPrivate::unload(this=0x000000011ba2c7d0, flag=UnloadSys) at qlibrary.cpp:614:36 frame #9: 0x0000000103f971fb libQt6Core_debug.6.dylib`QLibraryStore::cleanup() at qlibrary.cpp:425:22 frame #10: 0x0000000103f970f9 libQt6Core_debug.6.dylib`qlibraryCleanup() at qlibrary.cpp:447:5 frame #11: 0x0000000103f970d1 libQt6Core_debug.6.dylib`(anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_(this=0x00000001041edd38) at qlibrary.cpp:449:1 frame #12: 0x0000000103f930f5 libQt6Core_debug.6.dylib`(anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_(this=0x00000001041edd38) at qlibrary.cpp:449:1 frame #13: 0x00007fff202e5d25 libsystem_c.dylib`__cxa_finalize_ranges + 316 frame #14: 0x00007fff202e6010 libsystem_c.dylib`exit + 53 frame #15: 0x00007fff203d1f44 libdyld.dylib`start + 8 frame #16: 0x00007fff203d1f3d libdyld.dylib`start + 1 thread #5, queue = 'com.apple.root.user-interactive-qos', stop reason = signal SIGABRT frame #0: 0x00007fff203a356e libsystem_kernel.dylib`__abort_with_payload + 10 frame #1: 0x00007fff203a4fbd libsystem_kernel.dylib`abort_with_payload_wrapper_internal + 80 frame #2: 0x00007fff203a4f6d libsystem_kernel.dylib`abort_with_reason + 19 frame #3: 0x00007fff202749e3 libobjc.A.dylib`_objc_fatalv(unsigned long long, unsigned long long, char const*, __va_list_tag*) + 114 frame #4: 0x00007fff20274971 libobjc.A.dylib`_objc_fatal(char const*, ...) + 135 frame #5: 0x00007fff20255ccb libobjc.A.dylib`lookUpImpOrForward + 881 frame #6: 0x00007fff2025539b libobjc.A.dylib`_objc_msgSend_uncached + 75 frame #7: 0x00007fff22f368d6 AppKit`-[_NSWindowTransformAnimation setCurrentProgress:] + 42 frame #8: 0x00007fff22f37a8a AppKit`__55-[NSAnimation(NSInternal) _advanceTimeWithDisplayLink:]_block_invoke + 31 frame #9: 0x00007fff22d0774f AppKit`NSPerformVisuallyAtomicChange + 132 frame #10: 0x00007fff22f379dc AppKit`-[NSAnimation(NSInternal) _advanceTimeWithDisplayLink:] + 172 frame #11: 0x00007fff22e9a184 AppKit`-[NSScreenDisplayLink _fire] + 180 frame #12: 0x00007fff2362f0b4 AppKit`___NSRunLoopTimerCreateWithHandler_block_invoke + 34 frame #13: 0x00007fff204c6be9 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20 frame #14: 0x00007fff204c66dd CoreFoundation`__CFRunLoopDoTimer + 927 frame #15: 0x00007fff204c623a CoreFoundation`__CFRunLoopDoTimers + 307 frame #16: 0x00007fff204ace13 CoreFoundation`__CFRunLoopRun + 1988 frame #17: 0x00007fff204abf8c CoreFoundation`CFRunLoopRunSpecific + 563 frame #18: 0x00007fff2123d607 Foundation`-[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 212 frame #19: 0x00007fff22f378f0 AppKit`-[NSAnimation(NSInternal) _runBlocking] + 453 frame #20: 0x00007fff22f376ae AppKit`__42-[NSAnimation(NSInternal) _runInNewThread]_block_invoke + 97 frame #21: 0x0000000104edb032 libdispatch.dylib`_dispatch_call_block_and_release + 12 frame #22: 0x0000000104edc264 libdispatch.dylib`_dispatch_client_callout + 8 frame #23: 0x0000000104ef04ac libdispatch.dylib`_dispatch_root_queue_drain + 828 frame #24: 0x0000000104ef0d3f libdispatch.dylib`_dispatch_worker_thread2 + 127 frame #25: 0x0000000104f7eac7 libsystem_pthread.dylib`_pthread_wqthread + 244 frame #26: 0x0000000104f7dae3 libsystem_pthread.dylib`start_wqthread + 15 This has been e.g. observed when a QNSWindow isn't closed and released at application quit as expected. Although that is a corner case that shouldn't happen, the general case is still valid. Fixes: QTBUG-96208 Change-Id: I6c9d220e6f5389707baf7ae983f3156e8e51c316 Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io> Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io> (cherry picked from commit b6200de) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

Amends commit bfbd1a2. I've noticed this on my Mac, because the main thread crashed at the same time as the exitFromThread() thread was exiting and was running ~QLibraryStore: * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x106) * frame #0: 0x00007ff8020533be libobjc.A.dylib`getMethodNoSuper_nolock(objc_class*, objc_selector*) + 47 ... frame #19: 0x0000000103839694 QtCore`QCoreApplication::exec() at qcoreapplication.cpp:1454:32 frame #20: 0x0000000101fc94ea QtGui`QGuiApplication::exec() at qguiapplication.cpp:1993:12 frame #21: 0x0000000100004b59 apphelper`exitFromThread(argc=1, argv=0x00007ff7bfeff318) at apphelper.cpp:50:5 thread #8, name = 'QThread' ... frame #11: 0x00007ff8020c4f94 dyld`dyld4::APIs::dlclose(void*) + 178 frame #12: 0x0000000103e82476 QtCore`QLibraryPrivate::unload_sys(this=0x0000600001254160) at qlibrary_unix.cpp:252:24 frame #13: 0x0000000103e793fc QtCore`QLibraryPrivate::unload(this=0x0000600001254160, flag=UnloadSys) at qlibrary.cpp:561:36 frame #14: 0x00000001039740c8 QtCore`QFactoryLoader::~QFactoryLoader(this=0x00000001029e5e70) at qfactoryloader.cpp:438:21 frame #15: 0x00000001039745e9 QtCore`QFactoryLoader::~QFactoryLoader(this=0x00000001029e5e70) at qfactoryloader.cpp:425:1 frame #16: 0x0000000101eb723c QtGui`void std::__1::__destroy_at[abi:sn180100]<QFactoryLoader, 0>(__loc=0x00000001029e5e70) at construct_at.h:67:11 frame #17: 0x0000000101eb7209 QtGui`void std::__1::destroy_at[abi:sn180100]<QFactoryLoader, 0>(__loc=0x00000001029e5e70) at construct_at.h:100:3 frame #18: 0x0000000102046762 QtGui`QtGlobalStatic::Storage<QFactoryLoader, (anonymous namespace)::Q_QGS_piLoader>::destroyYourself(nextState=Destroyed) at qglobalstatic.h:61:9 frame #19: 0x0000000102046736 QtGui`QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_piLoader, (anonymous namespace)::Q_QGS_piLoader>::~Holder(this=0x00000001029e5e61) at qglobalstatic.h:83:9 frame #20: 0x00000001020465d9 QtGui`QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_piLoader, (anonymous namespace)::Q_QGS_piLoader>::~Holder(this=0x00000001029e5e61) at qglobalstatic.h:82:5 frame #21: 0x00007ff8022f4231 libsystem_c.dylib`__cxa_finalize_ranges + 402 frame #22: 0x00007ff8022f4052 libsystem_c.dylib`exit + 35 frame #23: 0x000000010000755a apphelper`exitFromThread(int, char**)::$_1::operator()(this=0x000060000175612c) const at apphelper.cpp:47:9 Pick-to: 6.9 6.9.0 6.8 Change-Id: Ib1c72c7975b247cc2d17fffd6c5de89a95c22dad Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

Amends commit bfbd1a2. I've noticed this on my Mac, because the main thread crashed at the same time as the exitFromThread() thread was exiting and was running ~QLibraryStore: * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x106) * frame #0: 0x00007ff8020533be libobjc.A.dylib`getMethodNoSuper_nolock(objc_class*, objc_selector*) + 47 ... frame #19: 0x0000000103839694 QtCore`QCoreApplication::exec() at qcoreapplication.cpp:1454:32 frame #20: 0x0000000101fc94ea QtGui`QGuiApplication::exec() at qguiapplication.cpp:1993:12 frame #21: 0x0000000100004b59 apphelper`exitFromThread(argc=1, argv=0x00007ff7bfeff318) at apphelper.cpp:50:5 thread #8, name = 'QThread' ... frame #11: 0x00007ff8020c4f94 dyld`dyld4::APIs::dlclose(void*) + 178 frame #12: 0x0000000103e82476 QtCore`QLibraryPrivate::unload_sys(this=0x0000600001254160) at qlibrary_unix.cpp:252:24 frame #13: 0x0000000103e793fc QtCore`QLibraryPrivate::unload(this=0x0000600001254160, flag=UnloadSys) at qlibrary.cpp:561:36 frame #14: 0x00000001039740c8 QtCore`QFactoryLoader::~QFactoryLoader(this=0x00000001029e5e70) at qfactoryloader.cpp:438:21 frame #15: 0x00000001039745e9 QtCore`QFactoryLoader::~QFactoryLoader(this=0x00000001029e5e70) at qfactoryloader.cpp:425:1 frame #16: 0x0000000101eb723c QtGui`void std::__1::__destroy_at[abi:sn180100]<QFactoryLoader, 0>(__loc=0x00000001029e5e70) at construct_at.h:67:11 frame #17: 0x0000000101eb7209 QtGui`void std::__1::destroy_at[abi:sn180100]<QFactoryLoader, 0>(__loc=0x00000001029e5e70) at construct_at.h:100:3 frame #18: 0x0000000102046762 QtGui`QtGlobalStatic::Storage<QFactoryLoader, (anonymous namespace)::Q_QGS_piLoader>::destroyYourself(nextState=Destroyed) at qglobalstatic.h:61:9 frame #19: 0x0000000102046736 QtGui`QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_piLoader, (anonymous namespace)::Q_QGS_piLoader>::~Holder(this=0x00000001029e5e61) at qglobalstatic.h:83:9 frame #20: 0x00000001020465d9 QtGui`QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_piLoader, (anonymous namespace)::Q_QGS_piLoader>::~Holder(this=0x00000001029e5e61) at qglobalstatic.h:82:5 frame #21: 0x00007ff8022f4231 libsystem_c.dylib`__cxa_finalize_ranges + 402 frame #22: 0x00007ff8022f4052 libsystem_c.dylib`exit + 35 frame #23: 0x000000010000755a apphelper`exitFromThread(int, char**)::$_1::operator()(this=0x000060000175612c) const at apphelper.cpp:47:9 Pick-to: 6.9.0 6.8 Change-Id: Ib1c72c7975b247cc2d17fffd6c5de89a95c22dad Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io> (cherry picked from commit e6a6757) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

Amends commit bfbd1a2. I've noticed this on my Mac, because the main thread crashed at the same time as the exitFromThread() thread was exiting and was running ~QLibraryStore: * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x106) * frame #0: 0x00007ff8020533be libobjc.A.dylib`getMethodNoSuper_nolock(objc_class*, objc_selector*) + 47 ... frame #19: 0x0000000103839694 QtCore`QCoreApplication::exec() at qcoreapplication.cpp:1454:32 frame #20: 0x0000000101fc94ea QtGui`QGuiApplication::exec() at qguiapplication.cpp:1993:12 frame #21: 0x0000000100004b59 apphelper`exitFromThread(argc=1, argv=0x00007ff7bfeff318) at apphelper.cpp:50:5 thread #8, name = 'QThread' ... frame #11: 0x00007ff8020c4f94 dyld`dyld4::APIs::dlclose(void*) + 178 frame #12: 0x0000000103e82476 QtCore`QLibraryPrivate::unload_sys(this=0x0000600001254160) at qlibrary_unix.cpp:252:24 frame #13: 0x0000000103e793fc QtCore`QLibraryPrivate::unload(this=0x0000600001254160, flag=UnloadSys) at qlibrary.cpp:561:36 frame #14: 0x00000001039740c8 QtCore`QFactoryLoader::~QFactoryLoader(this=0x00000001029e5e70) at qfactoryloader.cpp:438:21 frame #15: 0x00000001039745e9 QtCore`QFactoryLoader::~QFactoryLoader(this=0x00000001029e5e70) at qfactoryloader.cpp:425:1 frame #16: 0x0000000101eb723c QtGui`void std::__1::__destroy_at[abi:sn180100]<QFactoryLoader, 0>(__loc=0x00000001029e5e70) at construct_at.h:67:11 frame #17: 0x0000000101eb7209 QtGui`void std::__1::destroy_at[abi:sn180100]<QFactoryLoader, 0>(__loc=0x00000001029e5e70) at construct_at.h:100:3 frame #18: 0x0000000102046762 QtGui`QtGlobalStatic::Storage<QFactoryLoader, (anonymous namespace)::Q_QGS_piLoader>::destroyYourself(nextState=Destroyed) at qglobalstatic.h:61:9 frame #19: 0x0000000102046736 QtGui`QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_piLoader, (anonymous namespace)::Q_QGS_piLoader>::~Holder(this=0x00000001029e5e61) at qglobalstatic.h:83:9 frame #20: 0x00000001020465d9 QtGui`QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_piLoader, (anonymous namespace)::Q_QGS_piLoader>::~Holder(this=0x00000001029e5e61) at qglobalstatic.h:82:5 frame #21: 0x00007ff8022f4231 libsystem_c.dylib`__cxa_finalize_ranges + 402 frame #22: 0x00007ff8022f4052 libsystem_c.dylib`exit + 35 frame #23: 0x000000010000755a apphelper`exitFromThread(int, char**)::$_1::operator()(this=0x000060000175612c) const at apphelper.cpp:47:9 Change-Id: Ib1c72c7975b247cc2d17fffd6c5de89a95c22dad Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io> (cherry picked from commit e6a6757) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> (cherry picked from commit 87c7908)

…howAndHide() The event filter was still active when the QDialogButtonBox in its destruction process had already been demoted to QWidget. The ignoreShowAndHide guard came too late, because by the time we check it, in Private::handleButtonShowAndHide(), we had already cast q_ptr to QDialogButtonBox. Says UBSan: qdialogbuttonbox_p.h:26:5: runtime error: downcast of address 0x7fffefab47e0 which does not point to an object of type 'QDialogButtonBox' 0x7fffefab47e0: note: object is of type 'QWidget' 00 00 00 00 28 c1 5b 6e 6d 7f 00 00 80 22 10 00 90 61 00 00 d8 c2 5b 6e 6d 7f 00 00 00 00 00 00 ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'QWidget' #0 0x7f6d6b51141d in QDialogButtonBoxPrivate::q_func() qdialogbuttonbox_p.h:26 #1 0x7f6d6b51141d in QDialogButtonBoxPrivate::handleButtonShowAndHide(QAbstractButton*, QEvent*) qdialogbuttonbox.cpp:913 #2 0x7f6d6b51436c in eventFilter qdialogbuttonbox.cpp:127 #3 0x7f6d40c1a8f1 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) qcoreapplication.cpp:1248 #4 0x7f6d690b23d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) qapplication.cpp:3303 #5 0x7f6d69132a3a in QApplication::notify(QObject*, QEvent*) qapplication.cpp:3259 #6 0x7f6d40c1da6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) qcoreapplication.cpp:1111 #7 0x7f6d40c20473 in QCoreApplication::sendEvent(QObject*, QEvent*) qcoreapplication.cpp:1551 #8 0x7f6d690fe76c in QApplicationPrivate::setActiveWindow(QWidget*) qapplication.cpp:1857 #9 0x7f6d695ac796 in QWidgetPrivate::deactivateWidgetCleanup() qwidget.cpp:2326 #10 0x7f6d6976f8ce in QWidgetPrivate::hide_sys() qwidget.cpp:8256 #11 0x7f6d69814579 in QWidgetPrivate::hide_helper() qwidget.cpp:8199 #12 0x7f6d69887c1f in QWidgetPrivate::setVisible(bool) qwidget.cpp:8406 #13 0x7f6d69775d23 in QWidget::setVisible(bool) qwidget.cpp:8314 #14 0x7f6d695fb018 in QWidget::hide() qwidget.cpp:8179 #15 0x7f6d6981a183 in QWidgetPrivate::handleClose(QWidgetPrivate::CloseMode) qwidget.cpp:8580 #16 0x7f6d699e6fc6 in QWidgetWindow::closeEvent(QCloseEvent*) qwidgetwindow.cpp:871 #17 0x7f6d52ef9f5d in QWindow::event(QEvent*) qwindow.cpp:2721 #18 0x7f6d69a575f8 in QWidgetWindow::event(QEvent*) qwidgetwindow.cpp:398 #19 0x7f6d690b2491 in QApplicationPrivate::notify_helper(QObject*, QEvent*) qapplication.cpp:3309 #20 0x7f6d69132a3a in QApplication::notify(QObject*, QEvent*) qapplication.cpp:3259 #21 0x7f6d40c1da6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) qcoreapplication.cpp:1111 #22 0x7f6d40c205b3 in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) qcoreapplication.cpp:1565 #23 0x7f6d5287415b in QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*) qguiapplication.cpp:2911 #24 0x7f6d528b543f in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) qguiapplication.cpp:2259 #25 0x7f6d52fb5b02 in QWindowSystemEventHandler::sendEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) qwindowsysteminterface.cpp:190 #26 0x7f6d52fb5b02 in bool QWindowSystemHelper<QWindowSystemInterface::SynchronousDelivery>::handleEvent<QWindowSystemInterfacePrivate::CloseEvent, QWindow*>(QWindow*) qwindowsysteminterface.cpp:102 #27 0x7f6d52fb5b02 in handleWindowSystemEvent<QWindowSystemInterfacePrivate::CloseEvent, QWindowSystemInterface::SynchronousDelivery, QWindow*> qwindowsysteminterface.cpp:138 #28 0x7f6d52fb5b02 in bool QWindowSystemInterface::handleCloseEvent<QWindowSystemInterface::SynchronousDelivery>(QWindow*) qwindowsysteminterface.cpp:351 #29 0x7f6d52cb6f1e in QPlatformWindow::close() qplatformwindow.cpp:348 #30 0x7f6d52e7e158 in QWindow::close() qwindow.cpp:2449 #31 0x7f6d6981b4d2 in QWidgetPrivate::close() qwidget.cpp:8632 #32 0x7f6d698205c6 in QWidget::~QWidget() qwidget.cpp:1508 #33 0x7f6d6b4f6bf0 in QDialogButtonBox::~QDialogButtonBox() qdialogbuttonbox.cpp:496 To fix, don't delay the Q_Q to until after the ignoreShowAndHide check, since that woould be brittle. Instead, do as we for signal/slot connections, which we disconnect explicitly in ~QDialogButtonBox(), and delete the EventFilter explicitly there, too. This way, it's more natural, and also prevents all those useless event filter invocations from having to be processed later on. Amends aff0915. The original code, using QDialogButtonBox::eventFilter(), was not affected, since by the time QDialogButtonBox was demoted to QWidget, QWidget::eventFilter(), not QDialogButtonBox::eventFilter() would been invoked. Which just goes to show that one needs to be very careful with delegating too much responsibilites to the Private class, as it lives, fully derived, until ~QWidget() executes. Pick-to: 6.9 6.8 6.5 Change-Id: I04f36fd6d7d160932bfe1494fdff464786b85047 Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>

…veButtonsFromMenuBar() The function can be called from ~QMdiSubwindow(), and we checked for QWidgetPrivate::data.in_destructor before proceeding with the removal of buttons from the menubar, but we called QPointer<QMdiSubwindow>::data()->window(), which, at this point in time, had already been demoted to a QWidget: Says UBSan: qpointer.h:75:14: runtime error: downcast of address 0x6040000aca10 which does not point to an object of type 'QMdiSubWindow' 0x6040000aca10: note: object is of type 'QWidget' 00 00 00 00 28 01 99 bc ff 7e 00 00 80 dc 0f 00 90 61 00 00 d8 02 99 bc ff 7e 00 00 00 00 be be ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'QWidget' #0 0x7effb955f95a in QPointer<QMdiSubWindow>::data() const qpointer.h:75 #1 0x7effb955f95a in QPointer<QMdiSubWindow>::operator->() const qpointer.h:79 #2 0x7effb955f95a in QMdi::ControlContainer::removeButtonsFromMenuBar(QMenuBar*) qmdisubwindow.cpp:795 #3 0x7effb9563031 in QMdi::ControlContainer::~ControlContainer() qmdisubwindow.cpp:717 #4 0x7effb9566595 in QMdi::ControlContainer::~ControlContainer() qmdisubwindow.cpp:723 #5 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #6 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #7 0x7effb95cc02c in QMdiSubWindow::~QMdiSubWindow() qmdisubwindow.cpp:2254 #8 0x7effb95cc1d5 in QMdiSubWindow::~QMdiSubWindow() qmdisubwindow.cpp:2254 #9 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #10 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #11 0x7effb7bffba5 in QWidget::~QWidget() qwidget.cpp:1584 #12 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #13 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #14 0x7effb85f0dc5 in QFrame::~QFrame() qframe.cpp:235 #15 0x7effb859c747 in QAbstractScrollArea::~QAbstractScrollArea() qabstractscrollarea.cpp:478 #16 0x7effb93c08a6 in QMdiArea::~QMdiArea() qmdiarea.cpp:1703 #17 0x7effb93c0e55 in QMdiArea::~QMdiArea() qmdiarea.cpp:1703 #18 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #19 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #20 0x7effb920a425 in QMainWindow::~QMainWindow() qmainwindow.cpp:338 Fix by deleting the ControlContainer already from ~QMdiSubwindow(), ie. when we have not yet been demoted to QWidget. Amends the start of the public history. Pick-to: 6.9 6.8 6.5 5.15 Change-Id: Ia43c857bc1842b2b4957cc79e00f790b045d8f94 Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

…howAndHide() The event filter was still active when the QDialogButtonBox in its destruction process had already been demoted to QWidget. The ignoreShowAndHide guard came too late, because by the time we check it, in Private::handleButtonShowAndHide(), we had already cast q_ptr to QDialogButtonBox. Says UBSan: qdialogbuttonbox_p.h:26:5: runtime error: downcast of address 0x7fffefab47e0 which does not point to an object of type 'QDialogButtonBox' 0x7fffefab47e0: note: object is of type 'QWidget' 00 00 00 00 28 c1 5b 6e 6d 7f 00 00 80 22 10 00 90 61 00 00 d8 c2 5b 6e 6d 7f 00 00 00 00 00 00 ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'QWidget' #0 0x7f6d6b51141d in QDialogButtonBoxPrivate::q_func() qdialogbuttonbox_p.h:26 #1 0x7f6d6b51141d in QDialogButtonBoxPrivate::handleButtonShowAndHide(QAbstractButton*, QEvent*) qdialogbuttonbox.cpp:913 #2 0x7f6d6b51436c in eventFilter qdialogbuttonbox.cpp:127 #3 0x7f6d40c1a8f1 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) qcoreapplication.cpp:1248 #4 0x7f6d690b23d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) qapplication.cpp:3303 #5 0x7f6d69132a3a in QApplication::notify(QObject*, QEvent*) qapplication.cpp:3259 #6 0x7f6d40c1da6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) qcoreapplication.cpp:1111 #7 0x7f6d40c20473 in QCoreApplication::sendEvent(QObject*, QEvent*) qcoreapplication.cpp:1551 #8 0x7f6d690fe76c in QApplicationPrivate::setActiveWindow(QWidget*) qapplication.cpp:1857 #9 0x7f6d695ac796 in QWidgetPrivate::deactivateWidgetCleanup() qwidget.cpp:2326 #10 0x7f6d6976f8ce in QWidgetPrivate::hide_sys() qwidget.cpp:8256 #11 0x7f6d69814579 in QWidgetPrivate::hide_helper() qwidget.cpp:8199 #12 0x7f6d69887c1f in QWidgetPrivate::setVisible(bool) qwidget.cpp:8406 #13 0x7f6d69775d23 in QWidget::setVisible(bool) qwidget.cpp:8314 #14 0x7f6d695fb018 in QWidget::hide() qwidget.cpp:8179 #15 0x7f6d6981a183 in QWidgetPrivate::handleClose(QWidgetPrivate::CloseMode) qwidget.cpp:8580 #16 0x7f6d699e6fc6 in QWidgetWindow::closeEvent(QCloseEvent*) qwidgetwindow.cpp:871 #17 0x7f6d52ef9f5d in QWindow::event(QEvent*) qwindow.cpp:2721 #18 0x7f6d69a575f8 in QWidgetWindow::event(QEvent*) qwidgetwindow.cpp:398 #19 0x7f6d690b2491 in QApplicationPrivate::notify_helper(QObject*, QEvent*) qapplication.cpp:3309 #20 0x7f6d69132a3a in QApplication::notify(QObject*, QEvent*) qapplication.cpp:3259 #21 0x7f6d40c1da6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) qcoreapplication.cpp:1111 #22 0x7f6d40c205b3 in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) qcoreapplication.cpp:1565 #23 0x7f6d5287415b in QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*) qguiapplication.cpp:2911 #24 0x7f6d528b543f in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) qguiapplication.cpp:2259 #25 0x7f6d52fb5b02 in QWindowSystemEventHandler::sendEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) qwindowsysteminterface.cpp:190 #26 0x7f6d52fb5b02 in bool QWindowSystemHelper<QWindowSystemInterface::SynchronousDelivery>::handleEvent<QWindowSystemInterfacePrivate::CloseEvent, QWindow*>(QWindow*) qwindowsysteminterface.cpp:102 #27 0x7f6d52fb5b02 in handleWindowSystemEvent<QWindowSystemInterfacePrivate::CloseEvent, QWindowSystemInterface::SynchronousDelivery, QWindow*> qwindowsysteminterface.cpp:138 #28 0x7f6d52fb5b02 in bool QWindowSystemInterface::handleCloseEvent<QWindowSystemInterface::SynchronousDelivery>(QWindow*) qwindowsysteminterface.cpp:351 #29 0x7f6d52cb6f1e in QPlatformWindow::close() qplatformwindow.cpp:348 #30 0x7f6d52e7e158 in QWindow::close() qwindow.cpp:2449 #31 0x7f6d6981b4d2 in QWidgetPrivate::close() qwidget.cpp:8632 #32 0x7f6d698205c6 in QWidget::~QWidget() qwidget.cpp:1508 #33 0x7f6d6b4f6bf0 in QDialogButtonBox::~QDialogButtonBox() qdialogbuttonbox.cpp:496 To fix, don't delay the Q_Q to until after the ignoreShowAndHide check, since that woould be brittle. Instead, do as we for signal/slot connections, which we disconnect explicitly in ~QDialogButtonBox(), and delete the EventFilter explicitly there, too. This way, it's more natural, and also prevents all those useless event filter invocations from having to be processed later on. Amends aff0915. The original code, using QDialogButtonBox::eventFilter(), was not affected, since by the time QDialogButtonBox was demoted to QWidget, QWidget::eventFilter(), not QDialogButtonBox::eventFilter() would been invoked. Which just goes to show that one needs to be very careful with delegating too much responsibilites to the Private class, as it lives, fully derived, until ~QWidget() executes. Pick-to: 6.8 6.5 Change-Id: I04f36fd6d7d160932bfe1494fdff464786b85047 Reviewed-by: Axel Spoerl <axel.spoerl@qt.io> (cherry picked from commit dceff0a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

…howAndHide() The event filter was still active when the QDialogButtonBox in its destruction process had already been demoted to QWidget. The ignoreShowAndHide guard came too late, because by the time we check it, in Private::handleButtonShowAndHide(), we had already cast q_ptr to QDialogButtonBox. Says UBSan: qdialogbuttonbox_p.h:26:5: runtime error: downcast of address 0x7fffefab47e0 which does not point to an object of type 'QDialogButtonBox' 0x7fffefab47e0: note: object is of type 'QWidget' 00 00 00 00 28 c1 5b 6e 6d 7f 00 00 80 22 10 00 90 61 00 00 d8 c2 5b 6e 6d 7f 00 00 00 00 00 00 ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'QWidget' #0 0x7f6d6b51141d in QDialogButtonBoxPrivate::q_func() qdialogbuttonbox_p.h:26 #1 0x7f6d6b51141d in QDialogButtonBoxPrivate::handleButtonShowAndHide(QAbstractButton*, QEvent*) qdialogbuttonbox.cpp:913 #2 0x7f6d6b51436c in eventFilter qdialogbuttonbox.cpp:127 #3 0x7f6d40c1a8f1 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) qcoreapplication.cpp:1248 #4 0x7f6d690b23d5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) qapplication.cpp:3303 #5 0x7f6d69132a3a in QApplication::notify(QObject*, QEvent*) qapplication.cpp:3259 #6 0x7f6d40c1da6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) qcoreapplication.cpp:1111 #7 0x7f6d40c20473 in QCoreApplication::sendEvent(QObject*, QEvent*) qcoreapplication.cpp:1551 #8 0x7f6d690fe76c in QApplicationPrivate::setActiveWindow(QWidget*) qapplication.cpp:1857 #9 0x7f6d695ac796 in QWidgetPrivate::deactivateWidgetCleanup() qwidget.cpp:2326 #10 0x7f6d6976f8ce in QWidgetPrivate::hide_sys() qwidget.cpp:8256 #11 0x7f6d69814579 in QWidgetPrivate::hide_helper() qwidget.cpp:8199 #12 0x7f6d69887c1f in QWidgetPrivate::setVisible(bool) qwidget.cpp:8406 #13 0x7f6d69775d23 in QWidget::setVisible(bool) qwidget.cpp:8314 #14 0x7f6d695fb018 in QWidget::hide() qwidget.cpp:8179 #15 0x7f6d6981a183 in QWidgetPrivate::handleClose(QWidgetPrivate::CloseMode) qwidget.cpp:8580 #16 0x7f6d699e6fc6 in QWidgetWindow::closeEvent(QCloseEvent*) qwidgetwindow.cpp:871 #17 0x7f6d52ef9f5d in QWindow::event(QEvent*) qwindow.cpp:2721 #18 0x7f6d69a575f8 in QWidgetWindow::event(QEvent*) qwidgetwindow.cpp:398 #19 0x7f6d690b2491 in QApplicationPrivate::notify_helper(QObject*, QEvent*) qapplication.cpp:3309 #20 0x7f6d69132a3a in QApplication::notify(QObject*, QEvent*) qapplication.cpp:3259 #21 0x7f6d40c1da6a in QCoreApplication::notifyInternal2(QObject*, QEvent*) qcoreapplication.cpp:1111 #22 0x7f6d40c205b3 in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) qcoreapplication.cpp:1565 #23 0x7f6d5287415b in QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*) qguiapplication.cpp:2911 #24 0x7f6d528b543f in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) qguiapplication.cpp:2259 #25 0x7f6d52fb5b02 in QWindowSystemEventHandler::sendEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) qwindowsysteminterface.cpp:190 #26 0x7f6d52fb5b02 in bool QWindowSystemHelper<QWindowSystemInterface::SynchronousDelivery>::handleEvent<QWindowSystemInterfacePrivate::CloseEvent, QWindow*>(QWindow*) qwindowsysteminterface.cpp:102 #27 0x7f6d52fb5b02 in handleWindowSystemEvent<QWindowSystemInterfacePrivate::CloseEvent, QWindowSystemInterface::SynchronousDelivery, QWindow*> qwindowsysteminterface.cpp:138 #28 0x7f6d52fb5b02 in bool QWindowSystemInterface::handleCloseEvent<QWindowSystemInterface::SynchronousDelivery>(QWindow*) qwindowsysteminterface.cpp:351 #29 0x7f6d52cb6f1e in QPlatformWindow::close() qplatformwindow.cpp:348 #30 0x7f6d52e7e158 in QWindow::close() qwindow.cpp:2449 #31 0x7f6d6981b4d2 in QWidgetPrivate::close() qwidget.cpp:8632 #32 0x7f6d698205c6 in QWidget::~QWidget() qwidget.cpp:1508 #33 0x7f6d6b4f6bf0 in QDialogButtonBox::~QDialogButtonBox() qdialogbuttonbox.cpp:496 To fix, don't delay the Q_Q to until after the ignoreShowAndHide check, since that woould be brittle. Instead, do as we for signal/slot connections, which we disconnect explicitly in ~QDialogButtonBox(), and delete the EventFilter explicitly there, too. This way, it's more natural, and also prevents all those useless event filter invocations from having to be processed later on. Amends aff0915. The original code, using QDialogButtonBox::eventFilter(), was not affected, since by the time QDialogButtonBox was demoted to QWidget, QWidget::eventFilter(), not QDialogButtonBox::eventFilter() would been invoked. Which just goes to show that one needs to be very careful with delegating too much responsibilites to the Private class, as it lives, fully derived, until ~QWidget() executes. Pick-to: 6.5 Change-Id: I04f36fd6d7d160932bfe1494fdff464786b85047 Reviewed-by: Axel Spoerl <axel.spoerl@qt.io> (cherry picked from commit dceff0a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> (cherry picked from commit 6753ab4)

…veButtonsFromMenuBar() The function can be called from ~QMdiSubwindow(), and we checked for QWidgetPrivate::data.in_destructor before proceeding with the removal of buttons from the menubar, but we called QPointer<QMdiSubwindow>::data()->window(), which, at this point in time, had already been demoted to a QWidget: Says UBSan: qpointer.h:75:14: runtime error: downcast of address 0x6040000aca10 which does not point to an object of type 'QMdiSubWindow' 0x6040000aca10: note: object is of type 'QWidget' 00 00 00 00 28 01 99 bc ff 7e 00 00 80 dc 0f 00 90 61 00 00 d8 02 99 bc ff 7e 00 00 00 00 be be ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'QWidget' #0 0x7effb955f95a in QPointer<QMdiSubWindow>::data() const qpointer.h:75 #1 0x7effb955f95a in QPointer<QMdiSubWindow>::operator->() const qpointer.h:79 #2 0x7effb955f95a in QMdi::ControlContainer::removeButtonsFromMenuBar(QMenuBar*) qmdisubwindow.cpp:795 #3 0x7effb9563031 in QMdi::ControlContainer::~ControlContainer() qmdisubwindow.cpp:717 #4 0x7effb9566595 in QMdi::ControlContainer::~ControlContainer() qmdisubwindow.cpp:723 #5 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #6 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #7 0x7effb95cc02c in QMdiSubWindow::~QMdiSubWindow() qmdisubwindow.cpp:2254 #8 0x7effb95cc1d5 in QMdiSubWindow::~QMdiSubWindow() qmdisubwindow.cpp:2254 #9 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #10 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #11 0x7effb7bffba5 in QWidget::~QWidget() qwidget.cpp:1584 #12 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #13 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #14 0x7effb85f0dc5 in QFrame::~QFrame() qframe.cpp:235 #15 0x7effb859c747 in QAbstractScrollArea::~QAbstractScrollArea() qabstractscrollarea.cpp:478 #16 0x7effb93c08a6 in QMdiArea::~QMdiArea() qmdiarea.cpp:1703 #17 0x7effb93c0e55 in QMdiArea::~QMdiArea() qmdiarea.cpp:1703 #18 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #19 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #20 0x7effb920a425 in QMainWindow::~QMainWindow() qmainwindow.cpp:338 Fix by deleting the ControlContainer already from ~QMdiSubwindow(), ie. when we have not yet been demoted to QWidget. Amends the start of the public history. Pick-to: 6.8 6.5 5.15 Change-Id: Ia43c857bc1842b2b4957cc79e00f790b045d8f94 Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io> (cherry picked from commit 2e3d391) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

…veButtonsFromMenuBar() The function can be called from ~QMdiSubwindow(), and we checked for QWidgetPrivate::data.in_destructor before proceeding with the removal of buttons from the menubar, but we called QPointer<QMdiSubwindow>::data()->window(), which, at this point in time, had already been demoted to a QWidget: Says UBSan: qpointer.h:75:14: runtime error: downcast of address 0x6040000aca10 which does not point to an object of type 'QMdiSubWindow' 0x6040000aca10: note: object is of type 'QWidget' 00 00 00 00 28 01 99 bc ff 7e 00 00 80 dc 0f 00 90 61 00 00 d8 02 99 bc ff 7e 00 00 00 00 be be ^~~~~~~~~~~~~~~~~~~~~~~ vptr for 'QWidget' #0 0x7effb955f95a in QPointer<QMdiSubWindow>::data() const qpointer.h:75 #1 0x7effb955f95a in QPointer<QMdiSubWindow>::operator->() const qpointer.h:79 #2 0x7effb955f95a in QMdi::ControlContainer::removeButtonsFromMenuBar(QMenuBar*) qmdisubwindow.cpp:795 #3 0x7effb9563031 in QMdi::ControlContainer::~ControlContainer() qmdisubwindow.cpp:717 #4 0x7effb9566595 in QMdi::ControlContainer::~ControlContainer() qmdisubwindow.cpp:723 #5 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #6 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #7 0x7effb95cc02c in QMdiSubWindow::~QMdiSubWindow() qmdisubwindow.cpp:2254 #8 0x7effb95cc1d5 in QMdiSubWindow::~QMdiSubWindow() qmdisubwindow.cpp:2254 #9 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #10 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #11 0x7effb7bffba5 in QWidget::~QWidget() qwidget.cpp:1584 #12 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #13 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #14 0x7effb85f0dc5 in QFrame::~QFrame() qframe.cpp:235 #15 0x7effb859c747 in QAbstractScrollArea::~QAbstractScrollArea() qabstractscrollarea.cpp:478 #16 0x7effb93c08a6 in QMdiArea::~QMdiArea() qmdiarea.cpp:1703 #17 0x7effb93c0e55 in QMdiArea::~QMdiArea() qmdiarea.cpp:1703 #18 0x7eff8f4f2b7a in QObjectPrivate::deleteChildren() qobject.cpp:2226 #19 0x7effb7bf732d in QWidget::~QWidget() qwidget.cpp:1557 #20 0x7effb920a425 in QMainWindow::~QMainWindow() qmainwindow.cpp:338 Fix by deleting the ControlContainer already from ~QMdiSubwindow(), ie. when we have not yet been demoted to QWidget. Amends the start of the public history. Pick-to: 6.5 5.15 Change-Id: Ia43c857bc1842b2b4957cc79e00f790b045d8f94 Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io> (cherry picked from commit 2e3d391) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> (cherry picked from commit 0859415)

During application shutdown our global static list of loggers may be torn down, and then some other part of Qt issues logging during its own destruction. For example, QThreadStorage will emit: QThreadStorage: entry 1 destroyed before end of thread 0x106432bd0 which would crash: frame #7: 0x000000010a8d97a8 QtCore`qt_assert_x(where="Type *QGlobalStatic<QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>>::operator->() [Holder = QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>]", what="The global static was used after being destroyed", file="/Users/torarne/dev/qt/qtbase/src/corelib/global/qglobalstatic.h", line=88) at qassert.cpp:126:14 frame #8: 0x0000000101016e5c QtTest`QGlobalStatic<QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>>::operator->(this=0x00000001010808c8) at qglobalstatic.h:87:9 frame #9: 0x0000000101018f78 QtTest`QTest::messageHandler(type=QtWarningMsg, context=0x000000016fdfb848, message=0x000000016fdfb790) at qtestlog.cpp:308:30 frame #10: 0x000000010a131018 QtCore`qt_message_print(msgType=QtWarningMsg, context=0x000000016fdfb848, message=0x000000016fdfb790) at qlogging.cpp:2133:9 frame #11: 0x000000010a12bc50 QtCore`qt_message(msgType=QtWarningMsg, context=0x000000016fdfb848, msg="QThreadStorage: entry %d destroyed before end of thread %p", ap="\U00000001") at qlogging.cpp:411:5 frame #12: 0x000000010a8d9904 QtCore`QMessageLogger::warning(this=0x000000016fdfba30, msg="QThreadStorage: entry %d destroyed before end of thread %p") const at qlogging.cpp:651:5 frame #13: 0x000000010a62b8b8 QtCore`QThreadStoragePrivate::finish(tls=0x00000008c6c102e8) at qthreadstorage.cpp:169:17 frame #14: 0x000000010a617aec QtCore`QThreadPrivate::finish()::$_0::operator()(this=0x000000016fdfbb20) const at qthread_unix.cpp:468:9 frame #15: 0x000000010a6159a4 QtCore`void (anonymous namespace)::terminate_on_exception<QThreadPrivate::finish()::$_0>(t=0x000000016fdfbb20) at qthread_unix.cpp:380:5 frame #16: 0x000000010a615960 QtCore`QThreadPrivate::finish(this=0x00000008c707c000) at qthread_unix.cpp:450:5 frame #17: 0x000000010a617190 QtCore`destroy_current_thread_data(data=0x00000008c6c10280) at qthread_unix.cpp:172:19 frame #18: 0x000000010a617330 QtCore`(anonymous namespace)::QThreadDataDestroyer::EarlyMainThread::~EarlyMainThread(this=0x000000010aa9e640) at qthread_unix.cpp:232:17 frame #19: 0x000000010a6172b4 QtCore`(anonymous namespace)::QThreadDataDestroyer::EarlyMainThread::~EarlyMainThread(this=0x000000010aa9e640) at qthread_unix.cpp:229:9 frame #20: 0x0000000181ac542c libsystem_c.dylib`__cxa_finalize_ranges + 480 frame #21: 0x0000000181ac51ec libsystem_c.dylib`exit + 44 Pick-to: 6.11 6.10 6.8 Change-Id: Ie85788e49a34aa75fe44b52fb488bd0e763b78f9 Reviewed-by: Tim Blechmann <tim.blechmann@qt.io>

During application shutdown our global static list of loggers may be torn down, and then some other part of Qt issues logging during its own destruction. For example, QThreadStorage will emit: QThreadStorage: entry 1 destroyed before end of thread 0x106432bd0 which would crash: frame #7: 0x000000010a8d97a8 QtCore`qt_assert_x(where="Type *QGlobalStatic<QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>>::operator->() [Holder = QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>]", what="The global static was used after being destroyed", file="/Users/torarne/dev/qt/qtbase/src/corelib/global/qglobalstatic.h", line=88) at qassert.cpp:126:14 frame #8: 0x0000000101016e5c QtTest`QGlobalStatic<QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>>::operator->(this=0x00000001010808c8) at qglobalstatic.h:87:9 frame #9: 0x0000000101018f78 QtTest`QTest::messageHandler(type=QtWarningMsg, context=0x000000016fdfb848, message=0x000000016fdfb790) at qtestlog.cpp:308:30 frame #10: 0x000000010a131018 QtCore`qt_message_print(msgType=QtWarningMsg, context=0x000000016fdfb848, message=0x000000016fdfb790) at qlogging.cpp:2133:9 frame #11: 0x000000010a12bc50 QtCore`qt_message(msgType=QtWarningMsg, context=0x000000016fdfb848, msg="QThreadStorage: entry %d destroyed before end of thread %p", ap="\U00000001") at qlogging.cpp:411:5 frame #12: 0x000000010a8d9904 QtCore`QMessageLogger::warning(this=0x000000016fdfba30, msg="QThreadStorage: entry %d destroyed before end of thread %p") const at qlogging.cpp:651:5 frame #13: 0x000000010a62b8b8 QtCore`QThreadStoragePrivate::finish(tls=0x00000008c6c102e8) at qthreadstorage.cpp:169:17 frame #14: 0x000000010a617aec QtCore`QThreadPrivate::finish()::$_0::operator()(this=0x000000016fdfbb20) const at qthread_unix.cpp:468:9 frame #15: 0x000000010a6159a4 QtCore`void (anonymous namespace)::terminate_on_exception<QThreadPrivate::finish()::$_0>(t=0x000000016fdfbb20) at qthread_unix.cpp:380:5 frame #16: 0x000000010a615960 QtCore`QThreadPrivate::finish(this=0x00000008c707c000) at qthread_unix.cpp:450:5 frame #17: 0x000000010a617190 QtCore`destroy_current_thread_data(data=0x00000008c6c10280) at qthread_unix.cpp:172:19 frame #18: 0x000000010a617330 QtCore`(anonymous namespace)::QThreadDataDestroyer::EarlyMainThread::~EarlyMainThread(this=0x000000010aa9e640) at qthread_unix.cpp:232:17 frame #19: 0x000000010a6172b4 QtCore`(anonymous namespace)::QThreadDataDestroyer::EarlyMainThread::~EarlyMainThread(this=0x000000010aa9e640) at qthread_unix.cpp:229:9 frame #20: 0x0000000181ac542c libsystem_c.dylib`__cxa_finalize_ranges + 480 frame #21: 0x0000000181ac51ec libsystem_c.dylib`exit + 44 Pick-to: 6.10 6.8 Change-Id: Ie85788e49a34aa75fe44b52fb488bd0e763b78f9 Reviewed-by: Tim Blechmann <tim.blechmann@qt.io> (cherry picked from commit 5c8cd2a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

During application shutdown our global static list of loggers may be torn down, and then some other part of Qt issues logging during its own destruction. For example, QThreadStorage will emit: QThreadStorage: entry 1 destroyed before end of thread 0x106432bd0 which would crash: frame #7: 0x000000010a8d97a8 QtCore`qt_assert_x(where="Type *QGlobalStatic<QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>>::operator->() [Holder = QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>]", what="The global static was used after being destroyed", file="/Users/torarne/dev/qt/qtbase/src/corelib/global/qglobalstatic.h", line=88) at qassert.cpp:126:14 frame #8: 0x0000000101016e5c QtTest`QGlobalStatic<QtGlobalStatic::Holder<QTest::(anonymous namespace)::Q_QGS_loggers>>::operator->(this=0x00000001010808c8) at qglobalstatic.h:87:9 frame #9: 0x0000000101018f78 QtTest`QTest::messageHandler(type=QtWarningMsg, context=0x000000016fdfb848, message=0x000000016fdfb790) at qtestlog.cpp:308:30 frame #10: 0x000000010a131018 QtCore`qt_message_print(msgType=QtWarningMsg, context=0x000000016fdfb848, message=0x000000016fdfb790) at qlogging.cpp:2133:9 frame #11: 0x000000010a12bc50 QtCore`qt_message(msgType=QtWarningMsg, context=0x000000016fdfb848, msg="QThreadStorage: entry %d destroyed before end of thread %p", ap="\U00000001") at qlogging.cpp:411:5 frame #12: 0x000000010a8d9904 QtCore`QMessageLogger::warning(this=0x000000016fdfba30, msg="QThreadStorage: entry %d destroyed before end of thread %p") const at qlogging.cpp:651:5 frame #13: 0x000000010a62b8b8 QtCore`QThreadStoragePrivate::finish(tls=0x00000008c6c102e8) at qthreadstorage.cpp:169:17 frame #14: 0x000000010a617aec QtCore`QThreadPrivate::finish()::$_0::operator()(this=0x000000016fdfbb20) const at qthread_unix.cpp:468:9 frame #15: 0x000000010a6159a4 QtCore`void (anonymous namespace)::terminate_on_exception<QThreadPrivate::finish()::$_0>(t=0x000000016fdfbb20) at qthread_unix.cpp:380:5 frame #16: 0x000000010a615960 QtCore`QThreadPrivate::finish(this=0x00000008c707c000) at qthread_unix.cpp:450:5 frame #17: 0x000000010a617190 QtCore`destroy_current_thread_data(data=0x00000008c6c10280) at qthread_unix.cpp:172:19 frame #18: 0x000000010a617330 QtCore`(anonymous namespace)::QThreadDataDestroyer::EarlyMainThread::~EarlyMainThread(this=0x000000010aa9e640) at qthread_unix.cpp:232:17 frame #19: 0x000000010a6172b4 QtCore`(anonymous namespace)::QThreadDataDestroyer::EarlyMainThread::~EarlyMainThread(this=0x000000010aa9e640) at qthread_unix.cpp:229:9 frame #20: 0x0000000181ac542c libsystem_c.dylib`__cxa_finalize_ranges + 480 frame #21: 0x0000000181ac51ec libsystem_c.dylib`exit + 44 Pick-to: 6.8 Change-Id: Ie85788e49a34aa75fe44b52fb488bd0e763b78f9 Reviewed-by: Tim Blechmann <tim.blechmann@qt.io> (cherry picked from commit 5c8cd2a) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org> (cherry picked from commit b33274a)

Workaround for https://bugreports.qt.io/browse/QTBUG-62216

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Workaround for https://bugreports.qt.io/browse/QTBUG-62216#19

Workaround for https://bugreports.qt.io/browse/QTBUG-62216#19
m-roberts wants to merge 1 commit intoqt:5.11from
ali1234:vcfix-5.10.1

m-roberts commented Mar 8, 2018

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m-roberts commented Mar 8, 2018

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