Bug 412495

Summary: Discover crash
Product: [Applications] Discover Reporter: Yann <ash6782>
Component: discoverAssignee: Dan Leinir Turthra Jensen <leinir>
Status: RESOLVED DUPLICATE    
Severity: crash CC: aleixpol, lildarryl9, spmorton
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.15.4   
Target Milestone: ---   
Platform: Debian stable   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Yann 2019-10-01 05:18:17 UTC 
Application: plasma-discover (5.14.5)

Qt Version: 5.11.3
Frameworks Version: 5.54.0
Operating System: Linux 4.19.0-6-amd64 x86_64
Distribution: Debian GNU/Linux 10 (buster)

-- Information about the crash:
When i launch Discover, i'm going to Applications --> Games -->RPG, then after few times the left pannel disappear and the application crashes. I'll try with others categories, it do the same.
Sorry for my english.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6de1b1f800 (LWP 24621))]

Thread 10 (Thread 0x7f6d9ffff700 (LWP 24671)):
#0  0x00007f6de5935819 in __GI___poll (fds=0x7f6d940020d0, nfds=1, timeout=105141) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6de436e136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f6db8ffa700 (LWP 24667)):
#0  0x00007f6de436b02b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6de436d5a3 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6de436e06b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f6db9ffb700 (LWP 24634)):
#0  0x00007f6de43b7e69 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6de436e248 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#7  0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f6dc4f50700 (LWP 24629)):
#0  0x00007f6de5935819 in __GI___poll (fds=0x7f6db4007c70, nfds=1, timeout=53141) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f6de436e136 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#8  0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f6dc6591700 (LWP 24627)):
#0  0x00007f6de5e49150 in QElapsedTimer::clockType() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007f6de5e49169 in QElapsedTimer::isMonotonic() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f6de5e47f6e in QTimerInfoList::repairTimersIfNeeded() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f6de5e47fe3 in QTimerInfoList::timerWait(timespec&) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6de5e495fe in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6de436d669 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f6de436e06b in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#13 0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f6dd157c700 (LWP 24626)):
#0  0x00007f6de5931494 in __GI___libc_read (nbytes=16, buf=0x7f6dd157bb40, fd=12) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f6de5931494 in __GI___libc_read (fd=12, buf=0x7f6dd157bb40, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f6de43b3aa0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6de436dc0f in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6de436e0e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6de767c476 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f6dd285c700 (LWP 24625)):
#0  0x00007f6de4df000c in futex_wait_cancelable (private=0, expected=0, futex_word=0x564d65342438) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f6de4df000c in __pthread_cond_wait_common (abstime=0x0, mutex=0x564d653423e8, cond=0x564d65342410) at pthread_cond_wait.c:502
#2  0x00007f6de4df000c in __pthread_cond_wait (cond=0x564d65342410, mutex=0x564d653423e8) at pthread_cond_wait.c:655
#3  0x00007f6dd2e75e03 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f6dd2e75b57 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f6dd97c5700 (LWP 24624)):
#0  0x00007f6de5931494 in __GI___libc_read (nbytes=16, buf=0x7f6dd97c4b60, fd=9) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007f6de5931494 in __GI___libc_read (fd=9, buf=0x7f6dd97c4b60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f6de43b3aa0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6de436dc0f in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6de436e0e0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6de63d4c65 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f6ddaba7700 (LWP 24623)):
#0  0x00007f6de43b7e84 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f6de436d187 in g_main_context_acquire () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6de436dff5 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f6de5e4987b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6de5c46ec6 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de711c545 in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#8  0x00007f6de5c50aa7 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f6de4de9fa3 in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007f6de59404cf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6de1b1f800 (LWP 24621)):
[KCrash Handler]
#6  0x00007f6de5e017d7 in QMetaObject::cast(QObject const*) const () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f6de641312c in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007f6de641a412 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f6de641a4b2 in QQmlDelegateModel::release(QObject*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007f6de640ed79 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007f6de640f206 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007f6de640f510 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007f6de6410745 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007f6de633ed72 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007f6de633c044 in QQmlPropertyPrivate::write(QObject*, QQmlPropertyData const&, QVariant const&, QQmlContextData*, QFlags<QQmlPropertyData::WriteFlag>) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007f6de63bc694 in QQmlBinding::slowWrite(QQmlPropertyData const&, QQmlPropertyData const&, QV4::Value const&, bool, QFlags<QQmlPropertyData::WriteFlag>) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007f6de63bd7b0 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007f6de63bed7c in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#19 0x00007f6de63bb353 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#20 0x00007f6de63925f3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#21 0x00007f6de632ca8a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#22 0x00007f6de5e2123f in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f6de63925f3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#24 0x00007f6de632ca8a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#25 0x00007f6de5e2123f in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f6de63c0f58 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#27 0x00007f6de630ba69 in QV4::Runtime::method_callProperty(QV4::ExecutionEngine*, QV4::Value*, int, QV4::Value*, int) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#28 0x00007f6de62ff1f2 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#29 0x00007f6de63b54ff in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#30 0x00007f6de6349527 in QQmlBoundSignalExpression::evaluate(void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#31 0x00007f6de634a6bb in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#32 0x00007f6de63925f3 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#33 0x00007f6de632ca8a in QQmlData::signalEmitted(QAbstractDeclarativeData*, QObject*, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#34 0x00007f6de5e2123f in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007f6de640f096 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#36 0x00007f6de64104e6 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#37 0x00007f6de5e21906 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007f6de6406b7d in QQmlInstanceModel::createdItem(int, QObject*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#39 0x00007f6de641aae8 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#40 0x00007f6de6344edf in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#41 0x00007f6de634537f in QQmlEnginePrivate::incubate(QQmlIncubator&, QQmlContextData*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#42 0x00007f6de64199f1 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#43 0x00007f6de6419c91 in QQmlDelegateModel::object(int, QQmlIncubator::IncubationMode) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#44 0x00007f6de640ff7a in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#45 0x00007f6de6410504 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#46 0x00007f6de5e21906 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007f6de6406b16 in QQmlInstanceModel::modelUpdated(QQmlChangeSet const&, bool) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#48 0x00007f6de64117a8 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#49 0x00007f6de6417485 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#50 0x00007f6de64175f8 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#51 0x00007f6de64185c1 in QQmlDelegateModel::_q_itemsInserted(int, int) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#52 0x00007f6de641e575 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#53 0x00007f6de641e9cb in QQmlDelegateModel::qt_metacall(QMetaObject::Call, int, void**) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#54 0x00007f6de5e219c7 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#55 0x00007f6de5dac1be in QAbstractItemModel::rowsInserted(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#56 0x00007f6de5db38e5 in QAbstractItemModel::endInsertRows() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#57 0x00007f6de750497d in ResourcesProxyModel::sortedInsertion(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#58 0x00007f6de7505f12 in ResourcesProxyModel::addResources(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#59 0x00007f6de5e21a43 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#60 0x00007f6de7520882 in ResultsStream::resourcesFound(QVector<AbstractResource*> const&) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#61 0x00007f6de74fe854 in AggregatedResultsStream::emitResults() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#62 0x00007f6de74fe889 in AggregatedResultsStream::clear() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#63 0x00007f6de74fff63 in AggregatedResultsStream::destruction(QObject*) () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#64 0x00007f6de5e21a43 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#65 0x00007f6de5e21f8f in QObject::destroyed(QObject*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#66 0x00007f6de5e2867f in QObject::~QObject() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#67 0x00007f6de750f5a9 in ResultsStream::~ResultsStream() () at /usr/lib/x86_64-linux-gnu/plasma-discover/libDiscoverCommon.so
#68 0x00007f6de5e221a0 in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#69 0x00007f6de6c0c4b1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#70 0x00007f6de6c13950 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#71 0x00007f6de5df85a9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#72 0x00007f6de5dfb59b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#73 0x00007f6de5e4a233 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#74 0x00007f6de436df2e in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#75 0x00007f6de436e1c8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#76 0x00007f6de436e25c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#77 0x00007f6de5e49863 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#78 0x00007f6de17593e1 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#79 0x00007f6de5df727b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#80 0x00007f6de5dff262 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#81 0x0000564d64b2db23 in  ()
#82 0x00007f6de586b09b in __libc_start_main (main=0x564d64b2d550, argc=1, argv=0x7ffc55ead608, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc55ead5f8) at ../csu/libc-start.c:308
#83 0x0000564d64b2e0ca in _start ()
[Inferior 1 (process 24621) detached]

Reported using DrKonqi
Comment 1 spmorton 2019-11-19 15:07:59 UTC 
try these commands:
plasma-discover --listbackends
Available backends:
 * kns-backend
 * packagekit-backend
to be sure the packagekit-backend is  installed then issue the command:
plasma-discover --backends packagekit-backend

This should fix it
Comment 2 Darryl 2020-04-21 00:12:46 UTC 
It said something about repository and I can’t install anything and it doesn’t update.
Comment 3 Christoph Feck 2020-07-22 18:18:29 UTC 

*** This bug has been marked as a duplicate of bug 395388 ***