Application: plasma-discover (5.9.5)
 (Compiled from sources)
Qt Version: 5.7.1
Frameworks Version: 5.34.0
Operating System: Linux 4.8.0-52-generic x86_64
Distribution: KDE neon User Edition 5.9

-- Information about the crash:
I was updating the system through Discovery application when the application broken and closed.
This occured other times when I made some search or installing many applications.

The ditro that I'm using is Kde Neon.

The crash can be reproduced sometimes.

-- 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 0x7fbe9106a8c0 (LWP 11538))]

Thread 9 (Thread 0x7fbe457fa700 (LWP 11570)):
#0  0x00007fbe8d3a569d in read () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbe887bf6f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbe8877be74 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbe8877c330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbe8dfd275b in QEventDispatcherGlib::processEvents (this=0x7fbe280008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fbe8df7d0ba in QEventLoop::exec (this=this@entry=0x7fbe457f9d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007fbe8ddacf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#8  0x00007fbe8ddb1b48 in QThreadPrivate::start (arg=0x1f78c80) at thread/qthread_unix.cpp:368
#9  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe457fa700) at pthread_create.c:333
#10 0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 8 (Thread 0x7fbe5e978700 (LWP 11562)):
#0  0x00007fbe8d3a9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbe8877c38c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbe8dfd275b in QEventDispatcherGlib::processEvents (this=0x7fbe540008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fbe8df7d0ba in QEventLoop::exec (this=this@entry=0x7fbe5e977d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fbe8ddacf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007fbe8ddb1b48 in QThreadPrivate::start (arg=0x19e0200) at thread/qthread_unix.cpp:368
#7  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe5e978700) at pthread_create.c:333
#8  0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fbe5fa7d700 (LWP 11545)):
#0  0x00007fbe887c0a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbe8877c290 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbe8877c712 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbe612349d6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007fbe887a2bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe5fa7d700) at pthread_create.c:333
#6  0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fbe6027e700 (LWP 11544)):
#0  0x00007fbe887c0a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbe8877b320 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbe8877c245 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbe8877c4d9 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbe887a2bb5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe6027e700) at pthread_create.c:333
#7  0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fbe74af4700 (LWP 11543)):
#0  0x00007fbe8877bd63 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbe8877c330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbe8dfd275b in QEventDispatcherGlib::processEvents (this=0x7fbe6c002e00, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fbe8df7d0ba in QEventLoop::exec (this=this@entry=0x7fbe74af3c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007fbe8ddacf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#6  0x00007fbe906f2fc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fbe8ddb1b48 in QThreadPrivate::start (arg=0x1d4f880) at thread/qthread_unix.cpp:368
#8  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe74af4700) at pthread_create.c:333
#9  0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fbe7624e700 (LWP 11541)):
#0  0x00007fbe887c0a79 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fbe8877bdcc in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fbe8877c330 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbe8dfd275b in QEventDispatcherGlib::processEvents (this=0x7fbe680008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007fbe8df7d0ba in QEventLoop::exec (this=this@entry=0x7fbe7624dce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007fbe8ddacf64 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:507
#7  0x00007fbe8e723bf5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007fbe8ddb1b48 in QThreadPrivate::start (arg=0x8bd0d0) at thread/qthread_unix.cpp:368
#9  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe7624e700) at pthread_create.c:333
#10 0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fbe7745f700 (LWP 11540)):
#0  0x00007fbe8dfd0937 in QTimerInfoList::timerWait (this=0x7fbe70002ed0, tm=...) at kernel/qtimerinfo_unix.cpp:387
#1  0x00007fbe8dfd1d0e in timerSourcePrepareHelper (timeout=0x7fbe7745eb04, src=<optimized out>) at kernel/qeventdispatcher_glib.cpp:132
#2  timerSourcePrepare (source=<optimized out>, timeout=0x7fbe7745eb04) at kernel/qeventdispatcher_glib.cpp:165
#3  0x00007fbe8877b91d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fbe8877c2bb in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fbe8dfd275b in QEventDispatcherGlib::processEvents (this=0x7fbe700008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#7  0x00007fbe8df7d0ba in QEventLoop::exec (this=this@entry=0x7fbe7745ecd0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#8  0x00007fbe8ddacf64 in QThread::exec (this=this@entry=0x7fbe91223d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:507
#9  0x00007fbe911af735 in QDBusConnectionManager::run (this=0x7fbe91223d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#10 0x00007fbe8ddb1b48 in QThreadPrivate::start (arg=0x7fbe91223d60 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#11 0x00007fbe8a83a6ba in start_thread (arg=0x7fbe7745f700) at pthread_create.c:333
#12 0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fbe7fa45700 (LWP 11539)):
#0  0x00007fbe8d3a9b5d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fbe88311c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fbe883138d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fbe81f9dd79 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007fbe8ddb1b48 in QThreadPrivate::start (arg=0x82c040) at thread/qthread_unix.cpp:368
#5  0x00007fbe8a83a6ba in start_thread (arg=0x7fbe7fa45700) at pthread_create.c:333
#6  0x00007fbe8d3b582d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fbe9106a8c0 (LWP 11538)):
[KCrash Handler]
#6  0x0000000200040034 in ?? ()
#7  0x00007fbe61ba88cc in PackageKit::TransactionPrivate::destroy() () from /usr/lib/x86_64-linux-gnu/libpackagekitqt5.so.0
#8  0x00007fbe61ba8b78 in PackageKit::TransactionPrivate::daemonQuit() () from /usr/lib/x86_64-linux-gnu/libpackagekitqt5.so.0
#9  0x00007fbe61ba5da9 in ?? () from /usr/lib/x86_64-linux-gnu/libpackagekitqt5.so.0
#10 0x00007fbe8dfa9e89 in QMetaObject::activate (sender=0x1439630, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3740
#11 0x00007fbe61ba185e in PackageKit::DaemonPrivate::serviceOwnerChanged(QString const&, QString const&, QString const&) () from /usr/lib/x86_64-linux-gnu/libpackagekitqt5.so.0
#12 0x00007fbe61b9b9d8 in ?? () from /usr/lib/x86_64-linux-gnu/libpackagekitqt5.so.0
#13 0x00007fbe8dfa9e89 in QMetaObject::activate (sender=sender@entry=0x14330f0, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffecd333ef0) at kernel/qobject.cpp:3740
#14 0x00007fbe8dfaa837 in QMetaObject::activate (sender=sender@entry=0x14330f0, m=m@entry=0x7fbe912226a0 <QDBusServiceWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffecd333ef0) at kernel/qobject.cpp:3602
#15 0x00007fbe912080df in QDBusServiceWatcher::serviceOwnerChanged (this=this@entry=0x14330f0, _t1=..., _t2=..., _t3=...) at .moc/moc_qdbusservicewatcher.cpp:222
#16 0x00007fbe9120818f in QDBusServiceWatcherPrivate::_q_serviceOwnerChanged (this=<optimized out>, service=..., oldOwner=..., newOwner=...) at qdbusservicewatcher.cpp:76
#17 0x00007fbe9120870f in QDBusServiceWatcher::qt_static_metacall (_o=_o@entry=0x14330f0, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=3, _a=_a@entry=0x7ffecd3340c0) at .moc/moc_qdbusservicewatcher.cpp:99
#18 0x00007fbe91208ae0 in QDBusServiceWatcher::qt_metacall (this=0x14330f0, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0x7ffecd3340c0) at .moc/moc_qdbusservicewatcher.cpp:177
#19 0x00007fbe911bb923 in QDBusConnectionPrivate::deliverCall (this=<optimized out>, object=<optimized out>, msg=..., metaTypes=..., slotIdx=<optimized out>) at qdbusintegrator.cpp:995
#20 0x00007fbe8dfaad99 in QObject::event (this=0x14330f0, e=<optimized out>) at kernel/qobject.cpp:1263
#21 0x00007fbe8eee1ecc in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x14330f0, e=0x7fbe700cce20) at kernel/qapplication.cpp:3799
#22 0x00007fbe8eee98c6 in QApplication::notify (this=0x7ffecd334760, receiver=0x14330f0, e=0x7fbe700cce20) at kernel/qapplication.cpp:3556
#23 0x00007fbe8df7f0c8 in QCoreApplication::notifyInternal2 (receiver=0x14330f0, event=event@entry=0x7fbe700cce20) at kernel/qcoreapplication.cpp:988
#24 0x00007fbe8df8178b in QCoreApplication::sendEvent (event=0x7fbe700cce20, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x812520) at kernel/qcoreapplication.cpp:1649
#26 0x00007fbe8df81bf8 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1503
#27 0x00007fbe8dfd2333 in postEventSourceDispatch (s=0x856140) at kernel/qeventdispatcher_glib.cpp:276
#28 0x00007fbe8877c197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fbe8877c3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fbe8877c49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fbe8dfd273f in QEventDispatcherGlib::processEvents (this=0x8674d0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#32 0x00007fbe8df7d0ba in QEventLoop::exec (this=this@entry=0x7ffecd334680, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#33 0x00007fbe8df856cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1261
#34 0x000000000040d601 in main (argc=3, argv=<optimized out>) at /workspace/build/discover/main.cpp:141

Reported using DrKonqi