Bug 394244

Application: plasma-discover (5.12.5)

Qt Version: 5.10.1
Frameworks Version: 5.44.0
Operating System: Linux 4.16.7-300.fc28.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
1. Start Discover
2. Click on 'Applications' or 'Installed' in the sidebar on the left
3. Crash

Other menu items work fine.

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 0x7f988c11ee00 (LWP 13442))]

Thread 9 (Thread 0x7f98317ff700 (LWP 13483)):
#0  0x00007f9886c74929 in poll () at /lib64/libc.so.6
#1  0x00007f98806e6b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f9840cb9700 (LWP 13452)):
#0  0x00007f9886c74929 in poll () at /lib64/libc.so.6
#1  0x00007f98806e6b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f98434e6700 (LWP 13449)):
#0  0x00007f9886c74929 in poll () at /lib64/libc.so.6
#1  0x00007f98806e6b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#7  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f9848d84700 (LWP 13448)):
#0  0x00007f988072d1ed in g_mutex_lock () at /lib64/libglib-2.0.so.0
#1  0x00007f98806e6c1c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#2  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#3  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#5  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#6  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#7  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f98539a1700 (LWP 13447)):
#0  0x00007f9886c74929 in poll () at /lib64/libc.so.6
#1  0x00007f98806e6b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f988b4f5a1a in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#7  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f986113d700 (LWP 13446)):
#0  0x00007f9886c74929 in poll () at /lib64/libc.so.6
#1  0x00007f98806e6b06 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f98884b8339 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f986234e700 (LWP 13445)):
#0  0x00007f9886c70374 in read () at /lib64/libc.so.6
#1  0x00007f988072bdd0 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f98806e65fb in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f98806e6ab0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f9887b40c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f988793d9c6 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f988c226299 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#9  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#11 0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f986dfc8700 (LWP 13444)):
#0  0x00007f9886c74929 in poll () at /lib64/libc.so.6
#1  0x00007f988006c04f in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f988006dcaa in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f98709764d9 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f988794211d in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f9884fed564 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f9886c7f31f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f988c11ee00 (LWP 13442)):
[KCrash Handler]
#6  0x00007f9852d1036d in AppStream::Component::name() const () at /lib64/libAppStreamQt.so.2
#7  0x00007f984835eb42 in  () at /usr/lib64/qt5/plugins/discover/packagekit-backend.so
#8  0x00007f988b18bd8d in AbstractResource::nameSortKey() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#9  0x00007f988b17ecc5 in ResourcesProxyModel::lessThan(AbstractResource*, AbstractResource*) const () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#10 0x00007f988b17ef35 in  () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#11 0x00007f988b182829 in ResourcesProxyModel::addResources(QVector<AbstractResource*> const&) () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#12 0x00007f9887b18de3 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#13 0x00007f988b19b376 in ResultsStream::resourcesFound(QVector<AbstractResource*> const&) () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#14 0x00007f988b17a99c in AggregatedResultsStream::emitResults() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#15 0x00007f988b17a9d9 in AggregatedResultsStream::clear() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#16 0x00007f988b17bd87 in AggregatedResultsStream::destruction(QObject*) () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#17 0x00007f9887b18de3 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#18 0x00007f9887b19413 in QObject::destroyed(QObject*) () at /lib64/libQt5Core.so.5
#19 0x00007f9887b2044f in QObject::~QObject() () at /lib64/libQt5Core.so.5
#20 0x00007f988b18ac8d in ResultsStream::~ResultsStream() () at /usr/lib64/plasma-discover/libDiscoverCommon.so
#21 0x00007f9887b19a48 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#22 0x00007f988995ae95 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#23 0x00007f988996283a in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#24 0x00007f9887af0376 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#25 0x00007f9887af309b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#26 0x00007f9887b40ec7 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#27 0x00007f98806e67cd in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#28 0x00007f98806e6b98 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#29 0x00007f98806e6c30 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#30 0x00007f9887b40c13 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#31 0x00007f9870a04065 in QPAEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#32 0x00007f9887aef12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#33 0x00007f9887af75b6 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#34 0x0000560cb836de87 in  ()
#35 0x00007f9886ba81bb in __libc_start_main () at /lib64/libc.so.6
#36 0x0000560cb836e42a in _start ()

Reported using DrKonqi