Bug 391005

Application: plasmashell (5.8.7)

Qt Version: 5.6.2
Frameworks Version: 5.32.0
Operating System: Linux 4.14.13-desktop-1.mga6 x86_64
Distribution: "Mageia 6"

-- Information about the crash:
- What I was doing when the application crashed:
Closing a Konqueror window. There was two tabs in the window. I closed the first tab. Then, I closed the window. Then, Plasma crashed: the bottom panel disappeared and reappeared.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f76f8063800 (LWP 24485))]

Thread 8 (Thread 0x7f762013c700 (LWP 20223)):
#0  0x00007f76f274482d in read () from /lib64/libc.so.6
#1  0x00007f76ef6f3690 in g_wakeup_acknowledge () from /lib64/libglib-2.0.so.0
#2  0x00007f76ef6af79e in g_main_context_check () from /lib64/libglib-2.0.so.0
#3  0x00007f76ef6afc38 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#4  0x00007f76ef6afd9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#5  0x00007f76f3051e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#6  0x00007f76f2ffd49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#7  0x00007f76f2e373bc in QThread::exec() () from /lib64/libQt5Core.so.5
#8  0x00007f76f56c8205 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#9  0x00007f76f2e3bff9 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#10 0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#11 0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 7 (Thread 0x7f763f108700 (LWP 24639)):
#0  0x00007fff1659bb6d in clock_gettime ()
#1  0x00007f76f2762956 in clock_gettime () from /lib64/libc.so.6
#2  0x00007f76f2ee3166 in qt_gettime() () from /lib64/libQt5Core.so.5
#3  0x00007f76f304faa9 in QTimerInfoList::updateCurrentTime() () from /lib64/libQt5Core.so.5
#4  0x00007f76f304fff5 in QTimerInfoList::timerWait(timespec&) () from /lib64/libQt5Core.so.5
#5  0x00007f76f305135e in timerSourcePrepare(_GSource*, int*) () from /lib64/libQt5Core.so.5
#6  0x00007f76ef6af22d in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#7  0x00007f76ef6afbc3 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#8  0x00007f76ef6afd9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#9  0x00007f76f3051e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#10 0x00007f76f2ffd49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#11 0x00007f76f2e373bc in QThread::exec() () from /lib64/libQt5Core.so.5
#12 0x00007f76f604d902 in QQuickPixmapReader::run() () from /lib64/libQt5Quick.so.5
#13 0x00007f76f2e3bff9 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#14 0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#15 0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 6 (Thread 0x7f76ce39f700 (LWP 24558)):
#0  0x00007f76f1f4ac4f in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f76f7ab5234 in QTWTF::TCMalloc_PageHeap::scavengerThread() () from /lib64/libQt5Script.so.5
#2  0x00007f76f7ab5279 in QTWTF::TCMalloc_PageHeap::runScavengerThread(void*) () from /lib64/libQt5Script.so.5
#3  0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#4  0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 5 (Thread 0x7f76cffff700 (LWP 24551)):
#0  0x00007f76f2748f5d in poll () from /lib64/libc.so.6
#1  0x00007f76ef6afc94 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#2  0x00007f76ef6afd9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f76f3051e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007f76f2ffd49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f76f2e373bc in QThread::exec() () from /lib64/libQt5Core.so.5
#6  0x00007f76f56c8205 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#7  0x00007f76f2e3bff9 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#8  0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#9  0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 4 (Thread 0x7f76d5c0b700 (LWP 24534)):
#0  0x00007fff1659bb6d in clock_gettime ()
#1  0x00007f76f2762956 in clock_gettime () from /lib64/libc.so.6
#2  0x00007f76f2ee3166 in qt_gettime() () from /lib64/libQt5Core.so.5
#3  0x00007f76f304faa9 in QTimerInfoList::updateCurrentTime() () from /lib64/libQt5Core.so.5
#4  0x00007f76f304fff5 in QTimerInfoList::timerWait(timespec&) () from /lib64/libQt5Core.so.5
#5  0x00007f76f305135e in timerSourcePrepare(_GSource*, int*) () from /lib64/libQt5Core.so.5
#6  0x00007f76ef6af22d in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#7  0x00007f76ef6afbc3 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#8  0x00007f76ef6afd9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#9  0x00007f76f3051e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#10 0x00007f76f2ffd49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#11 0x00007f76f2e373bc in QThread::exec() () from /lib64/libQt5Core.so.5
#12 0x00007f76f56c8205 in QQmlThreadPrivate::run() () from /lib64/libQt5Qml.so.5
#13 0x00007f76f2e3bff9 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#14 0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#15 0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7f76d7650700 (LWP 24516)):
#0  0x00007f76f2748f5d in poll () from /lib64/libc.so.6
#1  0x00007f76ef6afc94 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#2  0x00007f76ef6afd9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007f76f3051e2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#4  0x00007f76f2ffd49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#5  0x00007f76f2e373bc in QThread::exec() () from /lib64/libQt5Core.so.5
#6  0x00007f76f819d635 in QDBusConnectionManager::run() () from /lib64/libQt5DBus.so.5
#7  0x00007f76f2e3bff9 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#8  0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#9  0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7f76dcfa8700 (LWP 24503)):
#0  0x00007f76f2748f5d in poll () from /lib64/libc.so.6
#1  0x00007f76f6a0c902 in _xcb_conn_wait () from /lib64/libxcb.so.1
#2  0x00007f76f6a0e657 in xcb_wait_for_event () from /lib64/libxcb.so.1
#3  0x00007f76df45bbe9 in QXcbEventReader::run() () from /lib64/libQt5XcbQpa.so.5
#4  0x00007f76f2e3bff9 in QThreadPrivate::start(void*) () from /lib64/libQt5Core.so.5
#5  0x00007f76f1f4566d in start_thread () from /lib64/libpthread.so.0
#6  0x00007f76f2754d9d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7f76f8063800 (LWP 24485)):
[KCrash Handler]
#6  0x00007f76f2fc7f80 in QSortFilterProxyModelPrivate::updateChildrenMapping(QModelIndex const&, QSortFilterProxyModelPrivate::Mapping*, Qt::Orientation, int, int, int, bool) [clone .constprop.192] () from /lib64/libQt5Core.so.5
#7  0x00007f76f2fc8230 in QSortFilterProxyModelPrivate::_q_sourceRowsRemoved(QModelIndex const&, int, int) () from /lib64/libQt5Core.so.5
#8  0x00007f76f2fcfb51 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Core.so.5
#9  0x00007f76f302a859 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#10 0x00007f76f309f1d4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#11 0x00007f76f2faa21b in QAbstractItemModel::endRemoveRows() () from /lib64/libQt5Core.so.5
#12 0x00007f763dc8958d in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) [clone .part.67] () from /lib64/libtaskmanager.so.6
#13 0x00007f763dc8c449 in TaskManager::TaskGroupingProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libtaskmanager.so.6
#14 0x00007f76f302a859 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#15 0x00007f76f309f184 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#16 0x00007f76f2fa9bb3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () from /lib64/libQt5Core.so.5
#17 0x00007f76f2fcd5d5 in QSortFilterProxyModelPrivate::remove_source_items(QVector<int>&, QVector<int>&, QVector<int> const&, QModelIndex const&, Qt::Orientation, bool) () from /lib64/libQt5Core.so.5
#18 0x00007f76f2fcd7b3 in QSortFilterProxyModelPrivate::source_items_about_to_be_removed(QModelIndex const&, int, int, Qt::Orientation) () from /lib64/libQt5Core.so.5
#19 0x00007f76f2fcfb30 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Core.so.5
#20 0x00007f76f302a859 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#21 0x00007f76f309f184 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#22 0x00007f76f2fa9bb3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () from /lib64/libQt5Core.so.5
#23 0x00007f763da295c5 in KConcatenateRowsProxyModelPrivate::slotRowsAboutToBeRemoved(QModelIndex const&, int, int) () from /lib64/libKF5ItemModels.so.5
#24 0x00007f763da2a9e1 in KConcatenateRowsProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libKF5ItemModels.so.5
#25 0x00007f76f302a859 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#26 0x00007f76f309f184 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#27 0x00007f76f2fa9bb3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () from /lib64/libQt5Core.so.5
#28 0x00007f76f2fc366b in QIdentityProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /lib64/libQt5Core.so.5
#29 0x00007f76f302a859 in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#30 0x00007f76f309f184 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () from /lib64/libQt5Core.so.5
#31 0x00007f76f2fa9bb3 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () from /lib64/libQt5Core.so.5
#32 0x00007f763dca21f8 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () from /lib64/libtaskmanager.so.6
#33 0x00007f76f302a90c in QMetaObject::activate(QObject*, int, int, void**) () from /lib64/libQt5Core.so.5
#34 0x00007f76f51fea12 in KWindowSystem::windowRemoved(unsigned long long) () from /lib64/libKF5WindowSystem.so.5
#35 0x00007f76d602ad12 in NETEventFilter::removeClient(unsigned int) () from /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#36 0x00007f76f51f70f8 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () from /lib64/libKF5WindowSystem.so.5
#37 0x00007f76f51f79a4 in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () from /lib64/libKF5WindowSystem.so.5
#38 0x00007f76f51f7c82 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () from /lib64/libKF5WindowSystem.so.5
#39 0x00007f76d602a476 in NETEventFilter::nativeEventFilter(xcb_generic_event_t*) () from /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#40 0x00007f76f2ffc6a7 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () from /lib64/libQt5Core.so.5
#41 0x00007f76df45fa45 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () from /lib64/libQt5XcbQpa.so.5
#42 0x00007f76df4609b6 in QXcbConnection::processXcbEvents() () from /lib64/libQt5XcbQpa.so.5
#43 0x00007f76f302b3aa in QObject::event(QEvent*) () from /lib64/libQt5Core.so.5
#44 0x00007f76f3911d0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#45 0x00007f76f3916e76 in QApplication::notify(QObject*, QEvent*) () from /lib64/libQt5Widgets.so.5
#46 0x00007f76f2fff628 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib64/libQt5Core.so.5
#47 0x00007f76f300144b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib64/libQt5Core.so.5
#48 0x00007f76f30519f3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /lib64/libQt5Core.so.5
#49 0x00007f76ef6afac7 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#50 0x00007f76ef6afcf8 in g_main_context_iterate.isra () from /lib64/libglib-2.0.so.0
#51 0x00007f76ef6afd9c in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#52 0x00007f76f3051e06 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#53 0x00007f76f2ffd49a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib64/libQt5Core.so.5
#54 0x00007f76f30057e1 in QCoreApplication::exec() () from /lib64/libQt5Core.so.5
#55 0x000000000041c8af in main ()

Possible duplicates by query: bug 387803, bug 387501, bug 384503, bug 384360, bug 383647.

Reported using DrKonqi