Bug 405609

Summary:	System settings crashed when I opened "Application style"
Product:	[Plasma] kwin	Reporter:	Patrick Silva <bugseforuns>
Component:	aurorae	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	abnercarvalhocosta, carla.pm101, makratroz, matt.fagnani, nate, oz.jam.cat, sts33nvyb
Priority:	NOR	Keywords:	drkonqi
Version:	git master
Target Milestone:	---
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:
Attachments:	New crash information added by DrKonqi New crash information added by DrKonqi New crash information added by DrKonqi New crash information added by DrKonqi valgrind log file for system settings segmentation fault

Description Patrick Silva 2019-03-18 18:08:24 UTC

Application: systemsettings5 (5.15.80)

Qt Version: 5.12.0
Frameworks Version: 5.57.0
Operating System: Linux 4.15.0-46-generic x86_64
Distribution: KDE neon Developer Edition

-- Information about the crash:
- What I was doing when the application crashed:
I was navigating through system settings in icon view mode
and it crashed when I opened "Application style"

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8665677680 (LWP 24381))]

Thread 8 (Thread 0x7f860e580700 (LWP 24870)):
#0  0x00007f8660beebf9 in __GI___poll (fds=0x7f85fc003b10, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8659c58539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8659c5864c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f866153115b in QEventDispatcherGlib::processEvents (this=0x7f85fc00def0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f86614d264a in QEventLoop::exec (this=this@entry=0x7f860e57fd40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f86612fa41a in QThread::exec (this=this@entry=0x556445bcb750) at thread/qthread.cpp:531
#6  0x00007f865f0b42e5 in QQmlThreadPrivate::run (this=0x556445bcb750) at qml/ftw/qqmlthread.cpp:148
#7  0x00007f86612fbbc2 in QThreadPrivate::start (arg=0x556445bcb750) at thread/qthread_unix.cpp:361
#8  0x00007f865c0166db in start_thread (arg=0x7f860e580700) at pthread_create.c:463
#9  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f860fbff700 (LWP 24586)):
#0  0x00007f8660bea0b4 in __GI___libc_read (fd=21, buf=0x7f860fbfec90, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f8659c9ccd0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8659c58027 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8659c584e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8659c588d2 in g_main_loop_run () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f85fb49f026 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6  0x00007f8659c80105 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f865c0166db in start_thread (arg=0x7f860fbff700) at pthread_create.c:463
#8  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f861502b700 (LWP 24585)):
#0  0x00007f8659c2ac25 in g_ptr_array_set_size () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8659c57989 in g_main_context_prepare () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8659c5846b in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8659c5864c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8659c58691 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8659c80105 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f865c0166db in start_thread (arg=0x7f861502b700) at pthread_create.c:463
#7  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f862a099700 (LWP 24423)):
#0  0x00007f8660beebf9 in __GI___poll (fds=0x7f8624007030, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8644032481 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007f8644023e40 in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007f86440244d0 in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007f8644024560 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007f86440323c9 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007f863fbcf318 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007f865c0166db in start_thread (arg=0x7f862a099700) at pthread_create.c:463
#8  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f86397b6700 (LWP 24421)):
#0  0x00007f8660beebf9 in __GI___poll (fds=0x7f8634004e00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8659c58539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8659c5864c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f866153115b in QEventDispatcherGlib::processEvents (this=0x7f8634000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f86614d264a in QEventLoop::exec (this=this@entry=0x7f86397b5d40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f86612fa41a in QThread::exec (this=this@entry=0x556440d9ca10) at thread/qthread.cpp:531
#6  0x00007f865f0b42e5 in QQmlThreadPrivate::run (this=0x556440d9ca10) at qml/ftw/qqmlthread.cpp:148
#7  0x00007f86612fbbc2 in QThreadPrivate::start (arg=0x556440d9ca10) at thread/qthread_unix.cpp:361
#8  0x00007f865c0166db in start_thread (arg=0x7f86397b6700) at pthread_create.c:463
#9  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f864767c700 (LWP 24420)):
#0  0x00007f865c01c9f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5564409d4afc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x5564409d4aa8, cond=0x5564409d4ad0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x5564409d4ad0, mutex=0x5564409d4aa8) at pthread_cond_wait.c:655
#3  0x00007f864cc7cb1b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f864cc7c847 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f865c0166db in start_thread (arg=0x7f864767c700) at pthread_create.c:463
#6  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f865068a700 (LWP 24410)):
#0  0x00007f8660beebf9 in __GI___poll (fds=0x7f8648011b90, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8659c58539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8659c5864c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f866153115b in QEventDispatcherGlib::processEvents (this=0x7f8648000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007f86614d264a in QEventLoop::exec (this=this@entry=0x7f8650689d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007f86612fa41a in QThread::exec (this=this@entry=0x7f8661c16d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:531
#6  0x00007f866199f015 in QDBusConnectionManager::run (this=0x7f8661c16d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#7  0x00007f86612fbbc2 in QThreadPrivate::start (arg=0x7f8661c16d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:361
#8  0x00007f865c0166db in start_thread (arg=0x7f865068a700) at pthread_create.c:463
#9  0x00007f8660bfb88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8665677680 (LWP 24381)):
[KCrash Handler]
#7  std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/bits/atomic_base.h:713
#8  std::atomic<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/atomic:452
#9  QAtomicOps<QtSharedPointer::ExternalRefCountData*>::load<QtSharedPointer::ExternalRefCountData*> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:227
#10 QBasicAtomicPointer<QtSharedPointer::ExternalRefCountData>::load (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:239
#11 QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x3) at tools/qsharedpointer.cpp:1376
#12 0x00007f865f080434 in QWeakPointer<QObject>::QWeakPointer<QObject> (ptr=0x3, this=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:688
#13 QWeakPointer<QObject>::assign<QObject> (ptr=0x3, this=0x55644377b380) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qsharedpointer_impl.h:684
#14 QPointer<QObject>::operator= (p=0x3, this=0x55644377b380) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qpointer.h:83
#15 QQmlListReferencePrivate::init (prop=..., propType=2064, engine=<optimized out>) at qml/qqmllist.cpp:64
#16 0x00007f865f08ee62 in QV4::QmlListWrapper::toVariant (this=this@entry=0x7f85ea2cc4d0) at qml/qqmllistwrapper.cpp:101
#17 0x00007f865efd5408 in toVariant (e=e@entry=0x556445bcfd40, value=..., typeHint=typeHint@entry=2, createJSValueForObjects=createJSValueForObjects@entry=true, visitedObjects=visitedObjects@entry=0x0) at jsruntime/qv4engine.cpp:1287
#18 0x00007f865efd55d4 in QV4::ExecutionEngine::toVariant (this=this@entry=0x556445bcfd40, value=..., typeHint=typeHint@entry=2, createJSValueForObjects=createJSValueForObjects@entry=true) at jsruntime/qv4engine.cpp:1252
#19 0x00007f865f0897c8 in QQmlBinding::slowWrite (this=this@entry=0x5564436de2e0, core=..., valueTypeData=..., result=..., isUndefined=isUndefined@entry=false, flags=..., flags@entry=...) at qml/qqmlbinding.cpp:417
#20 0x00007f865f08b7b5 in GenericBinding<2>::write (this=0x5564436de2e0, result=..., isUndefined=<optimized out>, flags=...) at qml/qqmlbinding.cpp:327
#21 0x00007f865f08c3f7 in QQmlNonbindingBinding::doUpdate (this=0x5564436de2e0, watcher=..., flags=..., scope=...) at qml/qqmlbinding.cpp:249
#22 0x00007f865f088953 in QQmlBinding::update (this=0x5564436de2e0, flags=...) at qml/qqmlbinding.cpp:185
#23 0x00007f865f096030 in QQmlObjectCreator::finalize (this=0x5564436fb950, interrupt=...) at qml/qqmlobjectcreator.cpp:1345
#24 0x00007f865f018421 in QQmlComponentPrivate::complete (enginePriv=0x556446052210, state=0x5564436fd580) at qml/qqmlcomponent.cpp:923
#25 0x00007f865f018532 in QQmlComponentPrivate::completeCreate (this=0x5564436fd4e0) at qml/qqmlcomponent.cpp:959
#26 0x00007f865f018312 in QQmlComponent::create (this=0x5564436ff200, context=0x556445bca850) at qml/qqmlcomponent.cpp:785
#27 0x00007f85ea728b67 in Aurorae::Decoration::init (this=0x556445bca8e0) at ./plugins/kdecorations/aurorae/src/aurorae.cpp:316
#28 0x00007f85eabfdb41 in KDecoration2::Preview::PreviewItem::componentComplete (this=0x556445bc38d0) at ./kcmkwin/kwindecoration/declarative-plugin/previewitem.cpp:71
#29 0x00007f865f096173 in QQmlObjectCreator::finalize (this=0x5564461c0cc0, interrupt=...) at qml/qqmlobjectcreator.cpp:1364
#30 0x00007f865f01d9f2 in QQmlIncubatorPrivate::incubate (this=0x55644606b6f0, i=...) at qml/qqmlincubator.cpp:345
#31 0x00007f865f01df8c in QQmlEnginePrivate::incubate (this=<optimized out>, i=..., forContext=<optimized out>) at qml/qqmlincubator.cpp:89
#32 0x00007f865f0fb323 in QQmlDelegateModelPrivate::object (this=this@entry=0x5564444ffe60, group=QQmlListCompositor::Default, index=index@entry=1, incubationMode=incubationMode@entry=QQmlIncubator::AsynchronousIfNested) at types/qqmldelegatemodel.cpp:1068
#33 0x00007f865f0fb421 in QQmlDelegateModel::object (this=<optimized out>, index=1, incubationMode=QQmlIncubator::AsynchronousIfNested) at types/qqmldelegatemodel.cpp:1109
#34 0x00007f865f72d92d in QQuickItemViewPrivate::createItem (this=this@entry=0x5564460ada10, modelIndex=modelIndex@entry=1, incubationMode=incubationMode@entry=QQmlIncubator::AsynchronousIfNested) at items/qquickitemview.cpp:2267
#35 0x00007f865f720616 in QQuickGridViewPrivate::addVisibleItems (this=0x5564460ada10, fillFrom=-0, fillTo=706, bufferFrom=<optimized out>, bufferTo=<optimized out>, doBuffer=false) at items/qquickgridview.cpp:520
#36 0x00007f865f72c5e6 in QQuickItemViewPrivate::refill (this=0x5564460ada10, from=<optimized out>, to=<optimized out>) at items/qquickitemview.cpp:1738
#37 0x00007f865f72ff4a in QQuickItemViewPrivate::regenerate (this=0x5564460ada10, orientationChanged=<optimized out>) at items/qquickitemview.cpp:1784
#38 0x00007f865f730104 in QQuickItemView::modelUpdated (this=0x5564460ad950, changeSet=..., reset=<optimized out>) at items/qquickitemview.cpp:1192
#39 0x00007f865f7317c0 in QQuickItemView::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qquickitemview_p.cpp:536
#40 0x00007f8661503e25 in QMetaObject::activate (sender=sender@entry=0x5564460b0b30, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe783816c0) at kernel/qobject.cpp:3778
#41 0x00007f86615044f7 in QMetaObject::activate (sender=sender@entry=0x5564460b0b30, m=m@entry=0x7f865f434060 <QQmlInstanceModel::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffe783816c0) at kernel/qobject.cpp:3631
#42 0x00007f865f0d5e26 in QQmlInstanceModel::modelUpdated (this=this@entry=0x5564460b0b30, _t1=..., _t2=<optimized out>) at .moc/moc_qqmlobjectmodel_p.cpp:225
#43 0x00007f865f0f2198 in QQmlDelegateModelPrivate::emitModelUpdated (this=<optimized out>, changeSet=..., reset=<optimized out>) at types/qqmldelegatemodel.cpp:1563
#44 0x00007f865f0f87bf in QQmlDelegateModelGroupPrivate::emitModelUpdated (this=0x556446107e60, reset=reset@entry=true) at types/qqmldelegatemodel.cpp:2408
#45 0x00007f865f0f893c in QQmlDelegateModelPrivate::emitChanges (this=0x5564444ffe60) at types/qqmldelegatemodel.cpp:1608
#46 0x00007f865f0ff749 in QQmlDelegateModel::_q_modelReset (this=0x5564460b0b30) at types/qqmldelegatemodel.cpp:1648
#47 0x00007f865f0ffb35 in QQmlDelegateModel::qt_static_metacall (_o=_o@entry=0x5564460b0b30, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=7, _a=_a@entry=0x7ffe783819d0) at .moc/moc_qqmldelegatemodel_p.cpp:197
#48 0x00007f865f0fffc5 in QQmlDelegateModel::qt_metacall (this=0x5564460b0b30, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0x7ffe783819d0) at .moc/moc_qqmldelegatemodel_p.cpp:334
#49 0x00007f8661503ee9 in QMetaObject::activate (sender=sender@entry=0x556445f95010, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=18, argv=argv@entry=0x7ffe783819d0) at kernel/qobject.cpp:3795
#50 0x00007f86615044f7 in QMetaObject::activate (sender=sender@entry=0x556445f95010, m=m@entry=0x7f866197f5a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=18, argv=argv@entry=0x7ffe783819d0) at kernel/qobject.cpp:3631
#51 0x00007f866147bf7a in QAbstractItemModel::modelReset (this=this@entry=0x556445f95010, _t1=...) at .moc/moc_qabstractitemmodel.cpp:647
#52 0x00007f866147dafc in QAbstractItemModel::endResetModel (this=this@entry=0x556445f95010) at itemmodels/qabstractitemmodel.cpp:3272
#53 0x00007f86614a6da2 in QSortFilterProxyModelPrivate::_q_sourceReset (this=0x556446112150) at itemmodels/qsortfilterproxymodel.cpp:1546
#54 0x00007f86614ab161 in QSortFilterProxyModel::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qsortfilterproxymodel.cpp:227
#55 0x00007f8661503e25 in QMetaObject::activate (sender=sender@entry=0x5564460291d0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=18, argv=argv@entry=0x7ffe78381b70) at kernel/qobject.cpp:3778
#56 0x00007f86615044f7 in QMetaObject::activate (sender=sender@entry=0x5564460291d0, m=m@entry=0x7f866197f5a0 <QAbstractItemModel::staticMetaObject>, local_signal_index=local_signal_index@entry=18, argv=argv@entry=0x7ffe78381b70) at kernel/qobject.cpp:3631
#57 0x00007f866147bf7a in QAbstractItemModel::modelReset (this=this@entry=0x5564460291d0, _t1=...) at .moc/moc_qabstractitemmodel.cpp:647
#58 0x00007f866147dafc in QAbstractItemModel::endResetModel (this=this@entry=0x5564460291d0) at itemmodels/qabstractitemmodel.cpp:3272
#59 0x00007f85eb252949 in KDecoration2::Configuration::DecorationsModel::init (this=0x5564460291d0) at ./kcmkwin/kwindecoration/decorationmodel.cpp:178
#60 0x00007f8661504992 in QObject::event (this=0x5564460291d0, e=<optimized out>) at kernel/qobject.cpp:1249
#61 0x00007f866255983c in QApplicationPrivate::notify_helper (this=this@entry=0x5564409428e0, receiver=receiver@entry=0x5564460291d0, e=e@entry=0x556445bf71e0) at kernel/qapplication.cpp:3752
#62 0x00007f8662560dd0 in QApplication::notify (this=0x7ffe78382410, receiver=0x5564460291d0, e=0x556445bf71e0) at kernel/qapplication.cpp:3499
#63 0x00007f86614d4328 in QCoreApplication::notifyInternal2 (receiver=0x5564460291d0, event=0x556445bf71e0) at kernel/qcoreapplication.cpp:1061
#64 0x00007f86614d44fe in QCoreApplication::sendEvent (receiver=<optimized out>, event=event@entry=0x556445bf71e0) at kernel/qcoreapplication.cpp:1451
#65 0x00007f86614d6e87 in QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x556440939ff0) at kernel/qcoreapplication.cpp:1800
#66 0x00007f86614d7428 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1654
#67 0x00007f8661531b23 in postEventSourceDispatch (s=0x5564409662d0) at kernel/qeventdispatcher_glib.cpp:276
#68 0x00007f8659c58387 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#69 0x00007f8659c585c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#70 0x00007f8659c5864c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#71 0x00007f866153113f in QEventDispatcherGlib::processEvents (this=0x556440975080, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#72 0x00007f86614d264a in QEventLoop::exec (this=this@entry=0x7ffe78382330, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#73 0x00007f86614db800 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1364
#74 0x000055643e939e78 in main (argc=<optimized out>, argv=<optimized out>) at ./app/main.cpp:71

Possible duplicates by query: bug 401091, bug 398918, bug 394578.

Reported using DrKonqi

Comment 1 Christoph Feck 2019-03-31 08:49:37 UTC

Crash is caused by Aurorae decoration engine, which uses QtQuick.

Comment 2 Vlad Zahorodnii 2019-04-21 22:09:16 UTC

Cannot reproduce. What themes do you have installed?

Comment 3 Patrick Silva 2019-04-22 18:18:33 UTC

The crash is not reproducible, it happened just once.
I only have the default themes breeze, oxygen and plastik.

Comment 4 Christoph Feck 2019-09-17 19:39:35 UTC

*** Bug 411376 has been marked as a duplicate of this bug. ***

Comment 5 Christoph Feck 2019-09-17 19:39:57 UTC

*** Bug 411434 has been marked as a duplicate of this bug. ***

Comment 6 Christoph Feck 2019-09-17 19:40:58 UTC

Patrick, now it happened (at least) twice. Maybe you can see a pattern, but it always involves the window decorations page.

Comment 7 Christoph Feck 2019-09-17 19:41:33 UTC

*** Bug 411499 has been marked as a duplicate of this bug. ***

Comment 8 Patrick Silva 2019-09-21 20:09:01 UTC

Sometimes I can reproduce this crash on Plasma 5.17 beta (on Wayland session), but the backtrace looks different.

Operating System: Arch Linux 
KDE Plasma Version: 5.16.90
KDE Frameworks Version: 5.62.0
Qt Version: 5.13.1
Kernel Version: 5.3.0-arch1-1-ARCH

open system settings > desktop behavior > desktop effects
click on "All settings" on top left corner
open "Application style"

if system settings did not crash, close it and repeat the steps above.
At some point probably it will crash.

Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3847625800 (LWP 8230))]

Thread 5 (Thread 0x7f38277bf700 (LWP 8257)):
#0  0x00007f384c2fd686 in __libc_disable_asynccancel () at /usr/lib/libc.so.6
#1  0x00007f384c2e567b in poll () at /usr/lib/libc.so.6
#2  0x00007f3848690130 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f381c00a080, timeout=<optimized out>, context=0x7f381c002540) at ../glib/glib/gmain.c:4216
#3  0x00007f3848690130 in g_main_context_iterate (context=context@entry=0x7f381c002540, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:3912
#4  0x00007f3848690201 in g_main_context_iteration (context=0x7f381c002540, may_block=may_block@entry=1) at ../glib/glib/gmain.c:3978
#5  0x00007f384c889a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f381c005070, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f384c8304ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f38277bed80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#7  0x00007f384c662385 in QThread::exec() (this=this@entry=0x55613cfb9d10) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#8  0x00007f384b96d849 in QQmlThreadPrivate::run() (this=0x55613cfb9d10) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/ftw/qqmlthread.cpp:152
#9  0x00007f384c6635b0 in QThreadPrivate::start(void*) (arg=0x55613cfb9d10) at thread/qthread_unix.cpp:360
#10 0x00007f384aec457f in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f384c2f00e3 in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f38369dc700 (LWP 8234)):
#0  0x00007f384c2e118c in read () at /usr/lib/libc.so.6
#1  0x00007f38486409f0 in read (__nbytes=16, __buf=0x7f38369dbb60, __fd=<optimized out>, __fd=<optimized out>, __buf=<optimized out>, __nbytes=<optimized out>) at /usr/include/bits/unistd.h:44
#2  0x00007f38486409f0 in g_wakeup_acknowledge (wakeup=0x7f3840003db0) at ../glib/glib/gwakeup.c:210
#3  0x00007f384868e9f1 in g_main_context_check (context=context@entry=0x7f3830000bf0, max_priority=2147483647, fds=fds@entry=0x7f3830004e30, n_fds=n_fds@entry=1) at ../glib/glib/gmain.c:3695
#4  0x00007f38486900d8 in g_main_context_iterate (context=context@entry=0x7f3830000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:3914
#5  0x00007f3848690201 in g_main_context_iteration (context=0x7f3830000bf0, may_block=may_block@entry=1) at ../glib/glib/gmain.c:3978
#6  0x00007f384c889a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f3830000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007f384c8304ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f38369dbd80, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#8  0x00007f384c662385 in QThread::exec() (this=this@entry=0x55613738a1b0) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#9  0x00007f384b96d849 in QQmlThreadPrivate::run() (this=0x55613738a1b0) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/ftw/qqmlthread.cpp:152
#10 0x00007f384c6635b0 in QThreadPrivate::start(void*) (arg=0x55613738a1b0) at thread/qthread_unix.cpp:360
#11 0x00007f384aec457f in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007f384c2f00e3 in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f3844913700 (LWP 8233)):
#0  0x00007f384aeca415 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f383f57bf5c in  () at /usr/lib/dri/i965_dri.so
#2  0x00007f383f57bb58 in  () at /usr/lib/dri/i965_dri.so
#3  0x00007f384aec457f in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f384c2f00e3 in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f384639e700 (LWP 8232)):
#0  0x00007f384c2e5667 in poll () at /usr/lib/libc.so.6
#1  0x00007f3848690130 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7f3840005260, timeout=<optimized out>, context=0x7f3840000bf0) at ../glib/glib/gmain.c:4216
#2  0x00007f3848690130 in g_main_context_iterate (context=context@entry=0x7f3840000bf0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:3912
#3  0x00007f3848690201 in g_main_context_iteration (context=0x7f3840000bf0, may_block=may_block@entry=1) at ../glib/glib/gmain.c:3978
#4  0x00007f384c889a1c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f3840000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f384c8304ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f384639dd70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#6  0x00007f384c662385 in QThread::exec() (this=this@entry=0x7f384cb46080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#7  0x00007f384cac2b37 in QDBusConnectionManager::run() (this=0x7f384cb46080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#8  0x00007f384c6635b0 in QThreadPrivate::start(void*) (arg=0x7f384cb46080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:360
#9  0x00007f384aec457f in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f384c2f00e3 in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f3847625800 (LWP 8230)):
[KCrash Handler]
#6  0x00007f384c6dda96 in std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load(std::memory_order) const (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/9.1.0/bits/atomic_base.h:734
#7  0x00007f384c6dda96 in std::atomic<QtSharedPointer::ExternalRefCountData*>::load(std::memory_order) const (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/9.1.0/atomic:519
#8  0x00007f384c6dda96 in QAtomicOps<QtSharedPointer::ExternalRefCountData*>::load<QtSharedPointer::ExternalRefCountData*>(std::atomic<QtSharedPointer::ExternalRefCountData*> const&) (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:227
#9  0x00007f384c6dda96 in QBasicAtomicPointer<QtSharedPointer::ExternalRefCountData>::load() const (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:239
#10 0x00007f384c6dda96 in QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) (obj=obj@entry=0x3) at tools/qsharedpointer.cpp:1347
#11 0x00007f384b938408 in QWeakPointer<QObject>::QWeakPointer<QObject>(QObject*, bool) (ptr=0x3, this=<optimized out>) at /usr/include/qt/QtCore/qsharedpointer_impl.h:688
#12 0x00007f384b938408 in QWeakPointer<QObject>::assign<QObject>(QObject*) (ptr=0x3, this=0x556140261bd0) at /usr/include/qt/QtCore/qsharedpointer_impl.h:684
#13 0x00007f384b938408 in QPointer<QObject>::operator=(QObject*) (p=0x3, this=0x556140261bd0) at /usr/include/qt/QtCore/qpointer.h:83
#14 0x00007f384b938408 in QQmlListReferencePrivate::init(QQmlListProperty<QObject> const&, int, QQmlEngine*) (prop=..., propType=1951, engine=<optimized out>) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmllist.cpp:64
#15 0x00007f384b946632 in QV4::QmlListWrapper::toVariant() const (this=<optimized out>) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmllistwrapper_p.h:87
#16 0x00007f384b886b26 in toVariant(QV4::ExecutionEngine*, QV4::Value const&, int, bool, V4ObjectSet*) (e=e@entry=0x5561402d9270, value=..., typeHint=typeHint@entry=2, createJSValueForObjects=createJSValueForObjects@entry=true, visitedObjects=visitedObjects@entry=0x0) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/jsruntime/qv4engine.cpp:1316
#17 0x00007f384b886fa5 in QV4::ExecutionEngine::toVariant(QV4::Value const&, int, bool) (this=this@entry=0x5561402d9270, value=..., typeHint=typeHint@entry=2, createJSValueForObjects=createJSValueForObjects@entry=true) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/jsruntime/qv4engine.cpp:1281
#18 0x00007f384b941260 in QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) (this=this@entry=0x55613cd62800, core=..., valueTypeData=..., result=..., isUndefined=isUndefined@entry=false, flags=..., flags@entry=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlbinding.cpp:415
#19 0x00007f384b9430a1 in GenericBinding<2>::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) (this=0x55613cd62800, result=..., isUndefined=<optimized out>, flags=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/include/QtQml/5.13.1/QtQml/private/../../../../../src/qml/jsruntime/qv4value_p.h:297
#20 0x00007f384b943c5d in QQmlNonbindingBinding::doUpdate(QQmlJavaScriptExpression::DeleteWatcher const&, QFlags<QQmlPropertyData::WriteFlag>, QV4::Scope&) (this=0x55613cd62800, watcher=..., flags=..., scope=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/include/QtQml/5.13.1/QtQml/private/../../../../../src/qml/jsruntime/qv4scopedvalue_p.h:239
#21 0x00007f384b9403a4 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) (this=0x55613cd62800, flags=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlbinding.cpp:185
#22 0x00007f384b94eebe in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) (this=0x5561401bf040, interrupt=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlobjectcreator.cpp:1383
#23 0x00007f384b8cf732 in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) (state=0x5561401befa0, enginePriv=0x55613d58ea50) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlcomponent.cpp:935
#24 0x00007f384b8cf732 in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) (enginePriv=0x55613d58ea50, state=0x5561401befa0) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlcomponent.cpp:931
#25 0x00007f384b8cf854 in QQmlComponentPrivate::completeCreate() (this=0x5561401bef00) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlcomponent.cpp:971
#26 0x00007f384b8cf854 in QQmlComponentPrivate::completeCreate() (this=0x5561401bef00) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlcomponent.cpp:966
#27 0x00007f384b8cf636 in QQmlComponent::create(QQmlContext*) (this=0x5561401beb80, context=0x55613cfb8e10) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlcomponent.cpp:797
#28 0x00007f382c1dce2b in  () at /usr/lib/qt/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#29 0x00007f382f0a154c in  () at /usr/lib/qt/qml/org/kde/kwin/private/kdecoration/libkdecorationprivatedeclarative.so
#30 0x00007f384b94f09d in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) (this=0x556143b507d0, interrupt=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlobjectcreator.cpp:1403
#31 0x00007f384b8d4acb in QQmlIncubatorPrivate::incubate(QQmlInstantiationInterrupt&) (this=0x55613cdc4aa0, i=...) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlincubator.cpp:345
#32 0x00007f384b8d5033 in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) (this=0x556137372e60, i=..., forContext=<optimized out>) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/qml/qqmlincubator.cpp:89
#33 0x00007f384b9bf290 in QQmlDelegateModelPrivate::object(QQmlListCompositor::Group, int, QQmlIncubator::IncubationMode) (this=0x5561373857e0, group=QQmlListCompositor::Default, index=2, incubationMode=<optimized out>) at /usr/include/c++/9.1.0/bits/atomic_base.h:413
#34 0x00007f384b9bf435 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) (this=<optimized out>, index=2, incubationMode=QQmlIncubator::AsynchronousIfNested) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/types/qqmldelegatemodel.cpp:1114
#35 0x00007f384be16336 in QQuickItemViewPrivate::createItem(int, QQmlIncubator::IncubationMode) (this=this@entry=0x55613d634590, modelIndex=modelIndex@entry=2, incubationMode=incubationMode@entry=QQmlIncubator::AsynchronousIfNested) at /usr/include/c++/9.1.0/bits/atomic_base.h:413
#36 0x00007f384be09f5e in QQuickGridViewPrivate::addVisibleItems(double, double, double, double, bool) (this=0x55613d634590, fillFrom=-0, fillTo=331, bufferFrom=<optimized out>, bufferTo=651, doBuffer=false) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/quick/items/qquickgridview.cpp:520
#37 0x00007f384be17594 in QQuickItemViewPrivate::refill(double, double) (this=0x55613d634590, from=-0, to=331) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/quick/items/qquickitemview.cpp:1751
#38 0x00007f384be1a1f1 in QQuickItemViewPrivate::regenerate(bool) (orientationChanged=<optimized out>, this=0x55613d634590) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/quick/items/qquickitemview.cpp:1797
#39 0x00007f384be1a1f1 in QQuickItemViewPrivate::regenerate(bool) (this=0x55613d634590, orientationChanged=<optimized out>) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/quick/items/qquickitemview.cpp:1782
#40 0x00007f384be1a39d in QQuickItemView::modelUpdated(QQmlChangeSet const&, bool) (this=0x55613ccd8a60, changeSet=..., reset=<optimized out>) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/quick/items/qquickitemview.cpp:1199
#41 0x00007f384be1b87d in QQuickItemView::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qquickitemview_p.cpp:541
#42 0x00007f384c85da11 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x55613cd37440, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3809
#43 0x00007f384b997ea7 in QQmlInstanceModel::modelUpdated(QQmlChangeSet const&, bool) (this=this@entry=0x55613cd37440, _t1=..., _t2=<optimized out>) at .moc/moc_qqmlobjectmodel_p.cpp:226
#44 0x00007f384b9b4389 in QQmlDelegateModelPrivate::emitModelUpdated(QQmlChangeSet const&, bool) (this=<optimized out>, changeSet=..., reset=<optimized out>) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/types/qqmldelegatemodel.cpp:1578
#45 0x00007f384b9bb362 in QQmlDelegateModelGroupPrivate::emitModelUpdated(bool) (this=0x55613cd376c0, reset=reset@entry=true) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/types/qqmldelegatemodel.cpp:2456
#46 0x00007f384b9bb778 in QQmlDelegateModelPrivate::emitChanges() (this=0x5561373857e0) at /usr/include/qt/QtCore/qobject.h:122
#47 0x00007f384b9bb778 in QQmlDelegateModelPrivate::emitChanges() (this=0x5561373857e0) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/types/qqmldelegatemodel.cpp:1609
#48 0x00007f384b9c583a in QQmlDelegateModel::_q_modelReset() (this=0x55613cd37440) at /tmp/makepkg/qt5-declarative-debug/src/qtdeclarative-everywhere-src-5.13.1/src/qml/types/qqmldelegatemodel.cpp:1668
#49 0x00007f384b9c5db9 in QQmlDelegateModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=_o@entry=0x55613cd37440, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=7, _a=_a@entry=0x7ffd654f1c20) at .moc/moc_qqmldelegatemodel_p.cpp:198
#50 0x00007f384b9c6163 in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) (this=0x55613cd37440, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0x7ffd654f1c20) at .moc/moc_qqmldelegatemodel_p.cpp:335
#51 0x00007f384c85dacd in QMetaObject::activate(QObject*, int, int, void**) (sender=0x5561402e3050, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3825
#52 0x00007f384c7d4b5b in QAbstractItemModel::modelReset(QAbstractItemModel::QPrivateSignal) (this=this@entry=0x5561402e3050, _t1=...) at .moc/moc_qabstractitemmodel.cpp:648
#53 0x00007f384c7d6bfe in QAbstractItemModel::endResetModel() (this=this@entry=0x5561402e3050) at itemmodels/qabstractitemmodel.cpp:3271
#54 0x00007f384c8055c5 in QSortFilterProxyModelPrivate::_q_sourceReset() (this=0x55613d1cc5f0) at itemmodels/qsortfilterproxymodel.cpp:1546
#55 0x00007f384c809ed8 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at itemmodels/qsortfilterproxymodel.h:189
#56 0x00007f384c85da11 in QMetaObject::activate(QObject*, int, int, void**) (sender=0x5561374b5eb0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3809
#57 0x00007f384c7d4b5b in QAbstractItemModel::modelReset(QAbstractItemModel::QPrivateSignal) (this=<optimized out>, _t1=...) at .moc/moc_qabstractitemmodel.cpp:648
#58 0x00007f382f0d44f8 in  () at /usr/lib/qt/plugins/kcms/kcm_kwindecoration.so
#59 0x00007f384c85e44a in QObject::event(QEvent*) (this=0x5561374b5eb0, e=<optimized out>) at kernel/qobject.cpp:1260
#60 0x00007f384d2904f5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x556136e1a620, receiver=receiver@entry=0x5561374b5eb0, e=e@entry=0x556143e55b30) at kernel/qapplication.cpp:3703
#61 0x00007f384d299e11 in QApplication::notify(QObject*, QEvent*) (this=0x7ffd654f2610, receiver=0x5561374b5eb0, e=0x556143e55b30) at kernel/qapplication.cpp:3449
#62 0x00007f384c8319c2 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x5561374b5eb0, event=0x556143e55b30) at ../../include/QtCore/../../src/corelib/kernel/qobject.h:143
#63 0x00007f384c834739 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x556136e11b80) at kernel/qcoreapplication.cpp:1840
#64 0x00007f384c88a404 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x556136e5ee80) at kernel/qeventdispatcher_glib.cpp:277
#65 0x00007f384868e3ae in g_main_dispatch (context=0x556136e46630) at ../glib/glib/gmain.c:3179
#66 0x00007f384868e3ae in g_main_context_dispatch (context=context@entry=0x556136e46630) at ../glib/glib/gmain.c:3844
#67 0x00007f38486901c1 in g_main_context_iterate (context=context@entry=0x556136e46630, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/glib/gmain.c:3917
#68 0x00007f3848690201 in g_main_context_iteration (context=0x556136e46630, may_block=may_block@entry=1) at ../glib/glib/gmain.c:3978
#69 0x00007f384c889a03 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x556136e5e300, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#70 0x00007f384c8304ec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd654f2530, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
#71 0x00007f384c838326 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
#72 0x0000556134e5b475 in  ()
#73 0x00007f384c21aee3 in __libc_start_main () at /usr/lib/libc.so.6
#74 0x0000556134e5b4fe in _start ()
[Inferior 1 (process 8230) detached]

Comment 9 Carla Pérez 2019-10-20 17:51:40 UTC

Created attachment 123366 [details]
New crash information added by DrKonqi

systemsettings5 (5.17.80) using Qt 5.13.1

- What I was doing when the application crashed:

System Settings crashes when I click on "Application Style"

-- Backtrace (Reduced):
#6  std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/bits/atomic_base.h:713
#7  std::atomic<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/atomic:452
#8  QAtomicOps<QtSharedPointer::ExternalRefCountData*>::load<QtSharedPointer::ExternalRefCountData*> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:227
#9  QBasicAtomicPointer<QtSharedPointer::ExternalRefCountData>::load (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:239
#10 QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x3) at tools/qsharedpointer.cpp:1347

Comment 10 Abner Carvalho 2019-11-02 22:10:39 UTC

Created attachment 123675 [details]
New crash information added by DrKonqi

systemsettings5 (5.17.2) using Qt 5.13.1

When I was changing on window management the settings application closed.

-- Backtrace (Reduced):
#6  std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/bits/atomic_base.h:713
#7  std::atomic<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/atomic:452
#8  QAtomicOps<QtSharedPointer::ExternalRefCountData*>::load<QtSharedPointer::ExternalRefCountData*> (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:227
#9  QBasicAtomicPointer<QtSharedPointer::ExternalRefCountData>::load (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:239
#10 QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x3) at tools/qsharedpointer.cpp:1347

Comment 11 DSZ 2019-11-05 14:04:48 UTC

Created attachment 123733 [details]
New crash information added by DrKonqi

systemsettings5 (5.12.8) using Qt 5.9.7

- What I was doing when the application crashed:

After a fresh install of opensuse leap 15.1, I was quickly going through settings, when clicking application style the system settings crashed.

-- Backtrace (Reduced):
#6  std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/bits/atomic_base.h:713
#7  std::atomic<QtSharedPointer::ExternalRefCountData*>::load (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/7/atomic:452
#8  QAtomicOps<QtSharedPointer::ExternalRefCountData*>::load<QtSharedPointer::ExternalRefCountData*> (_q_value=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_cxx11.h:227
#9  QBasicAtomicPointer<QtSharedPointer::ExternalRefCountData>::load (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:238
#10 QtSharedPointer::ExternalRefCountData::getAndRef (obj=obj@entry=0x3) at tools/qsharedpointer.cpp:1445

Comment 12 Matt Fagnani 2019-11-17 09:52:41 UTC

Created attachment 123965 [details]
New crash information added by DrKonqi

systemsettings5 (5.17.3) using Qt 5.12.5

- What I was doing when the application crashed:
I was using Plasma 5.17.3 on Wayland in Fedora 31. I opened System Settings. I clicked on Global Theme, Plasma Style, Application Style GNOME/GTK application style, then Window Decorations. System Settings disappeared after I clicked Window Decorations. System Settings had a segmentation fault in std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load at /usr/include/c++/9/bits/atomic_base.h:734.
The crashes occurred 2/4 times I've tried to click on Window Decorations.

-- Backtrace (Reduced):
#6  0x00007fdc6f2246aa in std::__atomic_base<QtSharedPointer::ExternalRefCountData*>::load(std::memory_order) const (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/9/bits/atomic_base.h:734
#7  std::atomic<QtSharedPointer::ExternalRefCountData*>::load(std::memory_order) const (__m=std::memory_order_relaxed, this=<optimized out>) at /usr/include/c++/9/atomic:519
#8  QAtomicOps<QtSharedPointer::ExternalRefCountData*>::load<QtSharedPointer::ExternalRefCountData*>(std::atomic<QtSharedPointer::ExternalRefCountData*> const&) (_q_value=...) at ../../include/QtCore/../../src/corelib/thread/qatomic_cxx11.h:227
#9  QBasicAtomicPointer<QtSharedPointer::ExternalRefCountData>::load() const (this=<optimized out>) at ../../include/QtCore/../../src/corelib/thread/qbasicatomic.h:239
#10 QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) (obj=obj@entry=0x3) at tools/qsharedpointer.cpp:1358

Comment 13 Matt Fagnani 2019-11-20 22:48:35 UTC

Created attachment 124037 [details]
valgrind log file for system settings segmentation fault

I ran valgrind --log-file=valgrind-systemsettings5-2.txt systemsettings5 &
I reproduced the crash in the same way as in my previous comment. The valgrind log showed an invalid read in wl_proxy_unref at wayland-client.c:229 and an invalid write in wl_proxy_unref at wayland-client.c:230 in libwayland-client. They appeared to be use-after-free errors like those I've previously reported for kwin_wayland, plasmashell, konsole, powerdevil, etc. ( https://bugs.kde.org/show_bug.cgi?id=409688 ) Several Conditional jump or move depends on uninitialised value(s) messages were shown. An invalid read at in load at atomic_base.h:740 of the address 0xb was shown which had a similar trace similar to that of the crashing threads.

==4968== Invalid read of size 8
==4968==    at 0x5D136AA: load (atomic_base.h:740)
==4968==    by 0x5D136AA: load (atomic:519)
==4968==    by 0x5D136AA: load<QtSharedPointer::ExternalRefCountData*> (qatomic_cxx11.h:227)
==4968==    by 0x5D136AA: load (qbasicatomic.h:239)
==4968==    by 0x5D136AA: QtSharedPointer::ExternalRefCountData::getAndRef(QObject const*) (qsharedpointer.cpp:1358)
==4968==    by 0x6ECFCF7: QWeakPointer<QObject> (qsharedpointer_impl.h:688)
==4968==    by 0x6ECFCF7: assign<QObject> (qsharedpointer_impl.h:684)
==4968==    by 0x6ECFCF7: operator= (qpointer.h:83)
==4968==    by 0x6ECFCF7: QQmlListReferencePrivate::init(QQmlListProperty<QObject> const&, int, QQmlEngine*) (qqmllist.cpp:64)
==4968==    by 0x6EDE064: QV4::QmlListWrapper::toVariant() const (qqmllistwrapper.cpp:101)
==4968==    by 0x6E20603: toVariant(QV4::ExecutionEngine*, QV4::Value const&, int, bool, QSet<QV4::Heap::Object*>*) (qv4engine.cpp:1306)
==4968==    by 0x6E20A68: QV4::ExecutionEngine::toVariant(QV4::Value const&, int, bool) (qv4engine.cpp:1271)
==4968==    by 0x6ED8B24: QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) (qqmlbinding.cpp:415)
==4968==    by 0x6EDA8F2: GenericBinding<2>::write(QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) (qqmlbinding.cpp:325)
==4968==    by 0x6EDB53F: QQmlNonbindingBinding::doUpdate(QQmlJavaScriptExpression::DeleteWatcher const&, QFlags<QQmlPropertyData::WriteFlag>, QV4::Scope&) (qqmlbinding.cpp:249)
==4968==    by 0x6ED7C93: QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) (qqmlbinding.cpp:185)
==4968==    by 0x6EE6825: QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) (qqmlobjectcreator.cpp:1352)
==4968==    by 0x6E65F80: complete (qqmlcomponent.cpp:935)
==4968==    by 0x6E65F80: QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) (qqmlcomponent.cpp:931)
==4968==    by 0x6E66091: completeCreate (qqmlcomponent.cpp:971)
==4968==    by 0x6E66091: QQmlComponentPrivate::completeCreate() (qqmlcomponent.cpp:966)
==4968==  Address 0xb is not stack'd, malloc'd or (recently) free'd
==4968== 

This crash might be due to an invalid pointer from the earlier use-after-free errors and use of uninitialized variables. Two further invalid reads were shown in socketNotifierSourceCheck at qeventdispatcher_glib.cpp:88 which look like use-after-free errors. Those errors might be side-effects of the segmentation fault. I've seen this crash 9 times which is about half the times I've tried to reproduce it. I'm attaching the full valgrind log.

Comment 14 Nate Graham 2019-11-22 13:41:26 UTC


*** This bug has been marked as a duplicate of bug 390857 ***