Bug 394430

Application: plasma-discover (5.12.5)

Qt Version: 5.10.1
Frameworks Version: 5.44.0
Operating System: Linux 4.16.3-301.fc28.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed:
1) I opened software center from the launcher
2) I clicked on the 'installed' tab
3) The application crashed

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f810dd36e00 (LWP 26435))]

Thread 9 (Thread 0x7f80ba4f9700 (LWP 26445)):
#0  0x00007f810238c218 in g_mutex_unlock () at /lib64/libglib-2.0.so.0
#1  0x00007f810234503c in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f8102345a3b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f810979fc2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f810959c9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f80bbb90700 (LWP 26443)):
#0  0x00007f81088d3929 in poll () at /lib64/libc.so.6
#1  0x00007f8102345b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f810979fc2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f810959c9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f80c0fc3700 (LWP 26442)):
#0  0x00007f81088d3929 in poll () at /lib64/libc.so.6
#1  0x00007f8102345b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f810979fc2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f810959c9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f80cf8e7700 (LWP 26441)):
#0  0x00007f81088cf374 in read () at /lib64/libc.so.6
#1  0x00007f810238add0 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f81023455fb in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f8102345ab0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f810979fc2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f810959c9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f810d154a1a in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#9  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#11 0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f80dd2d8700 (LWP 26440)):
#0  0x00007f8106c524fc in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f80de80f6f3 in  () at /usr/lib64/dri/nouveau_dri.so
#2  0x00007f80de80f40b in  () at /usr/lib64/dri/nouveau_dri.so
#3  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f80e6061700 (LWP 26439)):
#0  0x00007f81088d3929 in poll () at /lib64/libc.so.6
#1  0x00007f8102345b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f810979fc2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f810959c9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f810a117339 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f80e7272700 (LWP 26438)):
#0  0x00007f81023429a9 in g_source_iter_next () at /lib64/libglib-2.0.so.0
#1  0x00007f8102344f83 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007f8102345a3b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007f810979fc2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f810959c9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007f810de97299 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#8  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#9  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#10 0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f80efc5f700 (LWP 26437)):
#0  0x00007f81088d3929 in poll () at /lib64/libc.so.6
#1  0x00007f8101ccb04f in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f8101ccccaa in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f80f260e4d9 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f81095a111d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f8106c4c564 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f81088de31f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f810dd36e00 (LWP 26435)):
[KCrash Handler]
#6  0x00007f80c6de736d in AppStream::Component::name() const () at /lib64/libAppStreamQt.so.2
#7  0x00007f80ba763b42 in  () at /usr/lib64/qt5/plugins/discover/packagekit-backend.so
#8  0x00007f810cdead8d in AbstractResource::nameSortKey() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#9  0x00007f810cdddcd0 in ResourcesProxyModel::lessThan(AbstractResource*, AbstractResource*) const () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#10 0x00007f810cdddfd8 in  () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#11 0x00007f810cde1829 in ResourcesProxyModel::addResources(QVector<AbstractResource*> const&) () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#12 0x00007f8109777de3 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#13 0x00007f810cdfa376 in ResultsStream::resourcesFound(QVector<AbstractResource*> const&) () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#14 0x00007f810cdd999c in AggregatedResultsStream::emitResults() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#15 0x00007f810cdd99d9 in AggregatedResultsStream::clear() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#16 0x00007f810cddad87 in AggregatedResultsStream::destruction(QObject*) () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#17 0x00007f8109777de3 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#18 0x00007f8109778413 in QObject::destroyed(QObject*) () at /lib64/libQt5Core.so.5
#19 0x00007f810977f44f in QObject::~QObject() () at /lib64/libQt5Core.so.5
#20 0x00007f810cde9c8d in ResultsStream::~ResultsStream() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#21 0x00007f8109778a48 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#22 0x00007f810b5b9e95 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#23 0x00007f810b5c183a in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#24 0x00007f810974f376 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#25 0x00007f810975209b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#26 0x00007f810979fec7 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#27 0x00007f81023457cd in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#28 0x00007f8102345b98 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#29 0x00007f8102345c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#30 0x00007f810979fc13 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#31 0x00007f80f269c065 in QPAEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#32 0x00007f810974e12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#33 0x00007f81097565b6 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#34 0x0000563e8c313e87 in  ()
#35 0x00007f81088071bb in __libc_start_main () at /lib64/libc.so.6
#36 0x0000563e8c31442a in _start ()

Reported using DrKonqi