Application: plasmashell (5.9.5)

Qt Version: 5.8.0
Frameworks Version: 5.33.0
Operating System: Linux 4.10.13-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
I tried to close ocular window and closed the firefox window. Then I tried to close the other window but was already crashed. Restored after some seconds.

- Unusual behavior I noticed:
The menubar was wrong.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f300d93f800 (LWP 721))]

Thread 19 (Thread 0x7eeef7fff700 (LWP 7132)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f30076e14d3 in QSemaphore::acquire(int) () at /usr/lib/libQt5Core.so.5
#3  0x00007eeefd65c37c in  () at /usr/lib/qt/plugins/texttospeech/libqttexttospeech_flite.so
#4  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 18 (Thread 0x7f2f14e12700 (LWP 1976)):
#0  0x00007f3007914f21 in QTimerInfoList::repairTimersIfNeeded() () at /usr/lib/libQt5Core.so.5
#1  0x00007f3007914fb3 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#2  0x00007f300791666e in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f3001dc6e8d in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#4  0x00007f3001dc78db in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#6  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#8  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#9  0x00007f300a81b025 in  () at /usr/lib/libQt5Qml.so.5
#10 0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#11 0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 17 (Thread 0x7f2f164b1700 (LWP 1295)):
#0  0x00007f3001dc6d38 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3001dc78db in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 16 (Thread 0x7f2f16ffd700 (LWP 1225)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#11 0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 15 (Thread 0x7f2f177fe700 (LWP 1224)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#11 0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#12 0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#13 0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#14 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 14 (Thread 0x7f2f17fff700 (LWP 1223)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#11 0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#12 0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#13 0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#14 0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#15 0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#16 0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#17 0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#18 0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#19 0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#20 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7f2f2ca94700 (LWP 1222)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7f2f2d295700 (LWP 1221)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7f2f2da96700 (LWP 1220)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#11 0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#12 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f2f2e297700 (LWP 1219)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#9  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#10 0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#11 0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#12 0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#13 0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#14 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f2f3cd21700 (LWP 1218)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f30076e858b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2f4f0d81d0 in ThreadWeaver::Weaver::takeFirstAvailableJobOrSuspendOrWait(ThreadWeaver::Thread*, bool, bool, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#3  0x00007f2f4f0dc9d8 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#4  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#5  0x00007f2f4f0dca32 in  () at /usr/lib/libKF5ThreadWeaver.so.5
#6  0x00007f2f4f0d7263 in ThreadWeaver::Weaver::applyForWork(ThreadWeaver::Thread*, bool) () at /usr/lib/libKF5ThreadWeaver.so.5
#7  0x00007f2f4f0da249 in ThreadWeaver::Thread::run() () at /usr/lib/libKF5ThreadWeaver.so.5
#8  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f2f56e3c700 (LWP 1015)):
#0  0x00007f3006ff067d in poll () at /usr/lib/libc.so.6
#1  0x00007f3001dc79b6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f2f417fe0a7 in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#7  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f2f5763d700 (LWP 901)):
#0  0x00007f3001e0d1c9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3001dc799b in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f300b3cefd6 in  () at /usr/lib/libQt5Quick.so.5
#7  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f2fe3de8700 (LWP 839)):
#0  0x00007f30065a2756 in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f300d0c2234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007f300d0c2279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f2fedf71700 (LWP 824)):
#0  0x00007f3001e0d1c9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3001dc73c4 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3001dc7954 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f300a81b025 in  () at /usr/lib/libQt5Qml.so.5
#8  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f2feffff700 (LWP 796)):
#0  0x00007f3006ff067d in poll () at /usr/lib/libc.so.6
#1  0x00007f3001dc79b6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007f300a81b025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f2ff5a8b700 (LWP 748)):
#0  0x00007f3001dc493b in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007f3001dc72f4 in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#2  0x00007f3001dc7954 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f300791709b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f30076e2a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007f3008467125 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f2ff7b07700 (LWP 740)):
#0  0x00007f3006ff067d in poll () at /usr/lib/libc.so.6
#1  0x00007f300bfe88e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f300bfea679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f2ffa079239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f30076e76d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f300659c2e7 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f3006ffa54f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f300d93f800 (LWP 721)):
[KCrash Handler]
#6  0x00007f3007888540 in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f3007888819 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f30078903f9 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f30078edd79 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#10 0x00007f30079654b4 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#11 0x00007f3007869d9b in QAbstractItemModel::endRemoveRows() () at /usr/lib/libQt5Core.so.5
#12 0x00007f2f54ed54ab in  () at /usr/lib/libtaskmanager.so.6
#13 0x00007f2f54ed86f9 in  () at /usr/lib/libtaskmanager.so.6
#14 0x00007f30078edd79 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#15 0x00007f3007965444 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#16 0x00007f3007869643 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#17 0x00007f300788db45 in  () at /usr/lib/libQt5Core.so.5
#18 0x00007f300788dd44 in  () at /usr/lib/libQt5Core.so.5
#19 0x00007f30078903d8 in  () at /usr/lib/libQt5Core.so.5
#20 0x00007f30078edd79 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#21 0x00007f3007965444 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#22 0x00007f3007869643 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#23 0x00007f2f54c638e2 in  () at /usr/lib/libKF5ItemModels.so.5
#24 0x00007f30078edd79 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#25 0x00007f3007965444 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#26 0x00007f3007869643 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#27 0x00007f30078839f0 in  () at /usr/lib/libQt5Core.so.5
#28 0x00007f30078edd79 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#29 0x00007f3007965444 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#30 0x00007f3007869643 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /usr/lib/libQt5Core.so.5
#31 0x00007f2f54ef2101 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /usr/lib/libtaskmanager.so.6
#32 0x00007f30078ee0ee in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#33 0x00007f300a32d742 in KWindowSystem::windowRemoved(unsigned long long) () at /usr/lib/libKF5WindowSystem.so.5
#34 0x00007f2ff4463eb6 in  () at /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#35 0x00007f300a325d87 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /usr/lib/libKF5WindowSystem.so.5
#36 0x00007f300a32740c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /usr/lib/libKF5WindowSystem.so.5
#37 0x00007f300a327732 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /usr/lib/libKF5WindowSystem.so.5
#38 0x00007f2ff4463416 in  () at /usr/lib/qt/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#39 0x00007f30078bf58f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/libQt5Core.so.5
#40 0x00007f2ffa07a974 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/libQt5XcbQpa.so.5
#41 0x00007f2ffa07b655 in QXcbConnection::processXcbEvents() () at /usr/lib/libQt5XcbQpa.so.5
#42 0x00007f30078eebd9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#43 0x00007f300883034c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#44 0x00007f3008837b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#45 0x00007f30078c2470 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#46 0x00007f30078c4bfd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#47 0x00007f3007916c73 in  () at /usr/lib/libQt5Core.so.5
#48 0x00007f3001dc77b7 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#49 0x00007f3001dc7a20 in  () at /usr/lib/libglib-2.0.so.0
#50 0x00007f3001dc7acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#51 0x00007f300791707f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#52 0x00007f30078c08ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#53 0x00007f30078c8e14 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#54 0x000000000041ca42 in  ()
#55 0x00007f3006f2e511 in __libc_start_main () at /usr/lib/libc.so.6
#56 0x000000000041cdca in _start ()

Reported using DrKonqi