Bug 376166

Application: systemsettings5 (5.8.5)

Qt Version: 5.7.1
Frameworks Version: 5.29.0
Operating System: Linux 4.8.15-200.fc24.x86_64 x86_64
Distribution: "Fedora release 25 (Twenty Five)"

-- Information about the crash:
I was working on mitigating a video jitter issue and so change composting type from OpenGL to Xrender.  Chaning to Xrender seemed to stop the jitter, but then when going back to OpenGL the jitter was still gone.  So I turned "enable composter on startup off then hit the back link.  Dialog then crashed.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f762af02900 (LWP 24778))]

Thread 4 (Thread 0x7f75fcb96700 (LWP 24782)):
#0  0x00007f7623f1c460 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f7604a34c4b in util_queue_thread_func () from /usr/lib64/dri/r600_dri.so
#2  0x00007f7604a34aa7 in impl_thrd_routine () from /usr/lib64/dri/r600_dri.so
#3  0x00007f7623f166ca in start_thread () from /lib64/libpthread.so.0
#4  0x00007f7626eaef7f in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f7607b5e700 (LWP 24781)):
#0  0x00007f761fcde7f9 in g_mutex_lock () from /lib64/libglib-2.0.so.0
#1  0x00007f761fc986a6 in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#2  0x00007f761fc9907b in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#3  0x00007f761fc9926c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00007f7627cb373b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f7627c6473a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f7627ac15f3 in QThread::exec() () from /lib64/libQt5Core.so.5
#7  0x00007f76283bc739 in QDBusConnectionManager::run() () from /lib64/libQt5DBus.so.5
#8  0x00007f7627ac59da in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#9  0x00007f7623f166ca in start_thread () from /lib64/libpthread.so.0
#10 0x00007f7626eaef7f in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f760fe2e700 (LWP 24780)):
#0  0x00007f7626ea301d in poll () from /lib64/libc.so.6
#1  0x00007f7624562d10 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f7624564aa9 in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f761456ad69 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f7627ac59da in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f7623f166ca in start_thread () from /lib64/libpthread.so.0
#6  0x00007f7626eaef7f in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f762af02900 (LWP 24778)):
[KCrash Handler]
#6  0x00007f762653fb95 in QV4::WeakValue::free() () from /lib64/libQt5Qml.so.5
#7  0x00007f76265b0912 in QV4::QObjectWrapper::destroyObject(bool) () from /lib64/libQt5Qml.so.5
#8  0x00007f7626446baf in QV4::MemoryManager::sweep(bool) () from /lib64/libQt5Qml.so.5
#9  0x00007f7626447fbc in QV4::MemoryManager::~MemoryManager() () from /lib64/libQt5Qml.so.5
#10 0x00007f762652f4ab in QV4::ExecutionEngine::~ExecutionEngine() () from /lib64/libQt5Qml.so.5
#11 0x00007f762666ef96 in QV8Engine::~QV8Engine() () from /lib64/libQt5Qml.so.5
#12 0x00007f762666f0b9 in QV8Engine::~QV8Engine() () from /lib64/libQt5Qml.so.5
#13 0x00007f76264c67b6 in QJSEngine::~QJSEngine() () from /lib64/libQt5Qml.so.5
#14 0x00007f76265da75d in QQmlEngine::~QQmlEngine() () from /lib64/libQt5Qml.so.5
#15 0x00007f76265da819 in QQmlEngine::~QQmlEngine() () from /lib64/libQt5Qml.so.5
#16 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#17 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#18 0x00007f762bc37df9 in QQuickWidget::~QQuickWidget() () from /lib64/libQt5QuickWidgets.so.5
#19 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#20 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#21 0x00007f762918c389 in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#22 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#23 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#24 0x00007f76292da379 in QStackedWidget::~QStackedWidget() () from /lib64/libQt5Widgets.so.5
#25 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#26 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#27 0x00007f76292e7169 in QTabWidget::~QTabWidget() () from /lib64/libQt5Widgets.so.5
#28 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#29 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#30 0x00007f75f025b06e in ScreenLockerKcmForm::~ScreenLockerKcmForm() () from /usr/lib64/qt5/plugins/screenlocker_kcm.so
#31 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#32 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#33 0x00007f762a84d0bd in KCModule::~KCModule() () from /lib64/libKF5ConfigWidgets.so.5
#34 0x00007f75f025f68b in ScreenLockerKcm::~ScreenLockerKcm() () from /usr/lib64/qt5/plugins/screenlocker_kcm.so
#35 0x00007f762b7b30c4 in KCModuleProxy::deleteClient() () from /lib64/libKF5KCMUtils.so.5
#36 0x00007f762b7b316c in KCModuleProxy::~KCModuleProxy() () from /lib64/libKF5KCMUtils.so.5
#37 0x00007f762b7b3329 in KCModuleProxy::~KCModuleProxy() () from /lib64/libKF5KCMUtils.so.5
#38 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#39 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#40 0x00007f762918c389 in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#41 0x00007f7627c9325c in QObjectPrivate::deleteChildren() () from /lib64/libQt5Core.so.5
#42 0x00007f762918c09b in QWidget::~QWidget() () from /lib64/libQt5Widgets.so.5
#43 0x00007f7629305529 in QScrollArea::~QScrollArea() () from /lib64/libQt5Widgets.so.5
#44 0x00007f762974995b in KPageWidgetItem::~KPageWidgetItem() () from /lib64/libKF5WidgetsAddons.so.5
#45 0x00007f7629749979 in KPageWidgetItem::~KPageWidgetItem() () from /lib64/libKF5WidgetsAddons.so.5
#46 0x00007f762974a3bb in PageItem::~PageItem() () from /lib64/libKF5WidgetsAddons.so.5
#47 0x00007f762974afde in KPageWidgetModel::removePage(KPageWidgetItem*) () from /lib64/libKF5WidgetsAddons.so.5
#48 0x00007f762b9f0435 in ModuleView::closeModules() () from /lib64/libsystemsettingsview.so.3
#49 0x00007f75fa82e03e in IconMode::backToOverview() () from /usr/lib64/qt5/plugins/icon_mode.so
#50 0x00007f7627c8c7b1 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#51 0x00007f76291424b2 in QAction::triggered(bool) () from /lib64/libQt5Widgets.so.5
#52 0x00007f7629144ee2 in QAction::activate(QAction::ActionEvent) () from /lib64/libQt5Widgets.so.5
#53 0x00007f7629232dbd in QAbstractButtonPrivate::click() () from /lib64/libQt5Widgets.so.5
#54 0x00007f7629233004 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#55 0x00007f76292ff8aa in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#56 0x00007f7629190780 in QWidget::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#57 0x00007f76292ff992 in QToolButton::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#58 0x00007f7629148ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#59 0x00007f762915152d in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#60 0x00007f7627c657aa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#61 0x00007f762914fbbd in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /lib64/libQt5Widgets.so.5
#62 0x00007f76291aaf06 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () from /lib64/libQt5Widgets.so.5
#63 0x00007f76291ad963 in QWidgetWindow::event(QEvent*) () from /lib64/libQt5Widgets.so.5
#64 0x00007f7629148ecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#65 0x00007f7629150671 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#66 0x00007f7627c657aa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#67 0x00007f7628c3a2b3 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /lib64/libQt5Gui.so.5
#68 0x00007f7628c3bd85 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /lib64/libQt5Gui.so.5
#69 0x00007f7628c1cc4b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Gui.so.5
#70 0x00007f76145a1750 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5XcbQpa.so.5
#71 0x00007f761fc98e42 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#72 0x00007f761fc991c0 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#73 0x00007f761fc9926c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#74 0x00007f7627cb371f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#75 0x00007f7627c6473a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#76 0x00007f7627c6c23c in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#77 0x0000559e3f393230 in main ()

Possible duplicates by query: bug 376152, bug 376135, bug 376133, bug 376078, bug 376042.

Reported using DrKonqi