Bug 414832

Application: systemsettings5 (5.17.3)

Qt Version: 5.12.5
Frameworks Version: 5.64.0
Operating System: Linux 5.3.14-300.fc31.x86_64 x86_64
Distribution: "Fedora release 31 (Thirty One)"

-- Information about the crash:
Appearance - Application Style - Window Decorations - Crash!

Navigating to Window Decorations within Application Style results in System Settings crashing - this is reproducible - it happens evey time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f88ad7cc800 (LWP 3478))]

Thread 8 (Thread 0x7f88848aa700 (LWP 3494)):
#0  0x00007f88afc7b9dd in g_mutex_lock () from /lib64/libglib-2.0.so.0
#1  0x00007f88afc2ed27 in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#2  0x00007f88afc2f6cb in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#3  0x00007f88afc2f8d3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00007f88b1f73cd3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f88b1f1dceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f88b1d76395 in QThread::exec() () from /lib64/libQt5Core.so.5
#7  0x00007f88b1057119 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#8  0x00007f88b1d774e6 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#9  0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f88861db700 (LWP 3492)):
#0  0x00007f88b19eda60 in poll () from /lib64/libc.so.6
#1  0x00007f88afc2f79e in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#2  0x00007f88afc2f8d3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f88b1f73cd3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007f88b1f1dceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f88b1d76395 in QThread::exec() () from /lib64/libQt5Core.so.5
#6  0x00007f88b1057119 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#7  0x00007f88b1d774e6 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#8  0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#9  0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f888d5a4700 (LWP 3484)):
#0  0x00007f88b1f73961 in timerSourcePrepareHelper(GTimerSource*, int*) () from /lib64/libQt5Core.so.5
#1  0x00007f88b1f73a32 in timerSourcePrepare(_GSource*, int*) () from /lib64/libQt5Core.so.5
#2  0x00007f88afc2ed1a in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#3  0x00007f88afc2f6cb in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#4  0x00007f88afc2f8d3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00007f88b1f73cd3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f88b1f1dceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#7  0x00007f88b1d76395 in QThread::exec() () from /lib64/libQt5Core.so.5
#8  0x00007f88b1057119 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#9  0x00007f88b1d774e6 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#10 0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f888f68e700 (LWP 3483)):
#0  0x00007f88b19e944c in read () from /lib64/libc.so.6
#1  0x00007f88afc774cf in g_wakeup_acknowledge () from /lib64/libglib-2.0.so.0
#2  0x00007f88afc2f2e7 in g_main_context_check () from /lib64/libglib-2.0.so.0
#3  0x00007f88afc2f742 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#4  0x00007f88afc2f8d3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00007f88b1f73cd3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f88b1f1dceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#7  0x00007f88b1d76395 in QThread::exec() () from /lib64/libQt5Core.so.5
#8  0x00007f88b1057119 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#9  0x00007f88b1d774e6 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#10 0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#11 0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f889c852700 (LWP 3481)):
#0  0x00007f88b0586d45 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f889d6e414b in util_queue_thread_func () from /usr/lib64/dri/i965_dri.so
#2  0x00007f889d6e3d5b in impl_thrd_routine () from /usr/lib64/dri/i965_dri.so
#3  0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#4  0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f889f4f3700 (LWP 3480)):
#0  0x00007f88afc7ba08 in g_mutex_unlock () from /lib64/libglib-2.0.so.0
#1  0x00007f88afc2f1f1 in g_main_context_check () from /lib64/libglib-2.0.so.0
#2  0x00007f88afc2f742 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#3  0x00007f88afc2f8d3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#4  0x00007f88b1f73cd3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f88b1f1dceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f88b1d76395 in QThread::exec() () from /lib64/libQt5Core.so.5
#7  0x00007f88b21eff4a in QDBusConnectionManager::run() () from /lib64/libQt5DBus.so.5
#8  0x00007f88b1d774e6 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#9  0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#10 0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f88a049c700 (LWP 3479)):
#0  0x00007f88b19eda6f in poll () from /lib64/libc.so.6
#1  0x00007f88b053f38a in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f88b0540fea in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f88a06a0ac8 in QXcbEventQueue::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f88b1d774e6 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f88b05804e2 in start_thread () from /lib64/libpthread.so.0
#6  0x00007f88b19f8693 in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f88ad7cc800 (LWP 3478)):
[KCrash Handler]
#6  0x00007f88b1dec6aa in QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) () from /lib64/libQt5Core.so.5
#7  0x00007f88b101fcf8 in QQmlListReferencePrivate::init(QQmlListProperty<QObject> const&, int, QQmlEngine*) () from /lib64/libQt5Qml.so.5
#8  0x00007f88b102e065 in QV4::QmlListWrapper::toVariant() const () from /lib64/libQt5Qml.so.5
#9  0x00007f88b0f70604 in toVariant(QV4::ExecutionEngine*, QV4::Value const&, int, bool, QSet<QV4::Heap::Object*>*) () from /lib64/libQt5Qml.so.5
#10 0x00007f88b0f70a69 in QV4::ExecutionEngine::toVariant(QV4::Value const&, int, bool) () from /lib64/libQt5Qml.so.5
#11 0x00007f88b1028b25 in QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) () from /lib64/libQt5Qml.so.5
#12 0x00007f88b102a8f3 in GenericBinding<2>::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) () from /lib64/libQt5Qml.so.5
#13 0x00007f88b102b540 in QQmlNonbindingBinding::doUpdate(QQmlJavaScriptExpression::DeleteWatcher const&, QFlags<QQmlPropertyData::WriteFlag>, QV4::Scope&) () from /lib64/libQt5Qml.so.5
#14 0x00007f88b1027c94 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () from /lib64/libQt5Qml.so.5
#15 0x00007f88b1036826 in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () from /lib64/libQt5Qml.so.5
#16 0x00007f88b0fb5f81 in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () from /lib64/libQt5Qml.so.5
#17 0x00007f88b0fb6092 in QQmlComponentPrivate::completeCreate() () from /lib64/libQt5Qml.so.5
#18 0x00007f88b0fb5e98 in QQmlComponent::create(QQmlContext*) () from /lib64/libQt5Qml.so.5
#19 0x00007f8884fcaa8b in Aurorae::Decoration::init() () from /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#20 0x00007f8885488f8d in KDecoration2::Preview::PreviewItem::componentComplete() () from /usr/lib64/qt5/qml/org/kde/kwin/private/kdecoration/libkdecorationprivatedeclarative.so
#21 0x00007f88b1036a0c in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () from /lib64/libQt5Qml.so.5
#22 0x00007f88b0fbb1ba in QQmlIncubatorPrivate::incubate(QQmlInstantiationInterrupt&) () from /lib64/libQt5Qml.so.5
#23 0x00007f88b0fbb723 in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () from /lib64/libQt5Qml.so.5
#24 0x00007f88b10a41df in QQmlDelegateModelPrivate::object(QQmlListCompositor::Group, int, QQmlIncubator::IncubationMode) () from /lib64/libQt5Qml.so.5
#25 0x00007f88b10a4388 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) () from /lib64/libQt5Qml.so.5
#26 0x00007f88b1505e46 in QQuickItemViewPrivate::createItem(int, QQmlIncubator::IncubationMode) () from /lib64/libQt5Quick.so.5
#27 0x00007f88b14f980d in QQuickGridViewPrivate::addVisibleItems(double, double, double, double, bool) () from /lib64/libQt5Quick.so.5
#28 0x00007f88b1506d64 in QQuickItemViewPrivate::refill(double, double) () from /lib64/libQt5Quick.so.5
#29 0x00007f88b1509992 in QQuickItemViewPrivate::regenerate(bool) () from /lib64/libQt5Quick.so.5
#30 0x00007f88b1509b6c in QQuickItemView::modelUpdated(QQmlChangeSet const&, bool) () from /lib64/libQt5Quick.so.5
#31 0x00007f88b150afda in QQuickItemView::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Quick.so.5
#32 0x00007f88b1f48dfb in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#33 0x00007f88b107d09a in QQmlInstanceModel::modelUpdated(QQmlChangeSet const&, bool) () from /lib64/libQt5Qml.so.5
#34 0x00007f88b10997fc in QQmlDelegateModelPrivate::emitModelUpdated(QQmlChangeSet const&, bool) () from /lib64/libQt5Qml.so.5
#35 0x00007f88b10a0eb2 in QQmlDelegateModelGroupPrivate::emitModelUpdated(bool) () from /lib64/libQt5Qml.so.5
#36 0x00007f88b10a1028 in QQmlDelegateModelPrivate::emitChanges() () from /lib64/libQt5Qml.so.5
#37 0x00007f88b10aa6fa in QQmlDelegateModel::_q_modelReset() () from /lib64/libQt5Qml.so.5
#38 0x00007f88b10aac80 in QQmlDelegateModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Qml.so.5
#39 0x00007f88b10ab013 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () from /lib64/libQt5Qml.so.5
#40 0x00007f88b1f48ebc in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#41 0x00007f88b1ed5f2e in QAbstractItemModel::modelReset(QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#42 0x00007f88b1efd547 in QSortFilterProxyModelPrivate::_q_sourceReset() () from /lib64/libQt5Core.so.5
#43 0x00007f88b1f01a40 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Core.so.5
#44 0x00007f88b1f48dfb in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#45 0x00007f88b1ed5f2e in QAbstractItemModel::modelReset(QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#46 0x00007f8885940748 in KDecoration2::Configuration::DecorationsModel::init() () from /usr/lib64/qt5/plugins/kcms/kcm_kwindecoration.so
#47 0x00007f88b1f49c7a in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#48 0x00007f88b2920ad6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#49 0x00007f88b292a150 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#50 0x00007f88b1f1ede8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#51 0x00007f88b1f21d8b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5
#52 0x00007f88b1f73f27 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5Core.so.5
#53 0x00007f88afc2f4a0 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#54 0x00007f88afc2f830 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#55 0x00007f88afc2f8d3 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#56 0x00007f88b1f73cb5 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#57 0x00007f88b1f1dceb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#58 0x00007f88b1f25a16 in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#59 0x000055cf06a4586e in main ()
[Inferior 1 (process 3478) detached]

Possible duplicates by query: bug 414753, bug 414731, bug 414476, bug 414432, bug 414358.

Reported using DrKonqi