Application: plasmashell (5.18.5)

Qt Version: 5.14.2
Frameworks Version: 5.70.0
Operating System: Linux 4.15.0-101-generic x86_64
Windowing system: X11
Distribution: KDE neon User Edition 5.18

-- Information about the crash:
- Unusual behavior I noticed:

I have every couple of starts a black plasma screen on one monitor (the second is fine), but only in the position of the background picture. Task bar is working fine. Plasma crashed then (~10 min later) when updateing the disti (KDE Neon) with discover. 
Before that the compositior didn't started and I kicked the opengl mode manually.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fc0cc4a8140 (LWP 1767))]

Thread 15 (Thread 0x7fc0551ec700 (LWP 5894)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0f0693ea0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0f0693e50, cond=0x55f0f0693e78) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0f0693e78, mutex=0x55f0f0693e50) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0f0693e50) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x7fc0a80c5b80, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x7fc0a80c5b88, mutex=mutex@entry=0x7fc0a80c5b80, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x7fc0a80c5b78) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x7fc0a80c5ae0) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x7fc0a80c5ae0) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x7fc0a80c5ae0) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc0551ec700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fc033dfa700 (LWP 5877)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0ef1b7c40) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0ef1b7bf0, cond=0x55f0ef1b7c18) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0ef1b7c18, mutex=0x55f0ef1b7bf0) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0ef1b7bf0) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0edda69b0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0edda69b8, mutex=mutex@entry=0x55f0edda69b0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0edda69a8) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0edda6910) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0edda6910) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0edda6910) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc033dfa700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fc055bed700 (LWP 5833)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0eecc59f4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0eecc59a0, cond=0x55f0eecc59c8) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0eecc59c8, mutex=0x55f0eecc59a0) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0eecc59a0) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0f0a1df10, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0f0a1df18, mutex=mutex@entry=0x55f0f0a1df10, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0f0a1df08) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0f0a1de70) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0f0a1de70) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0f0a1de70) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc055bed700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fc057fff700 (LWP 2953)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0efb64544) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0efb644f0, cond=0x55f0efb64518) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0efb64518, mutex=0x55f0efb644f0) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0efb644f0) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0efb58310, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0efb58318, mutex=mutex@entry=0x55f0efb58310, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0efb58308) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0efb58270) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0efb58270) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0efb58270) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc057fff700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fc05d3d1700 (LWP 2952)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0ef8de6b0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0ef8de660, cond=0x55f0ef8de688) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0ef8de688, mutex=0x55f0ef8de660) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0ef8de660) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0ef8d9830, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0ef8d9838, mutex=mutex@entry=0x55f0ef8d9830, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0ef8d9828) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0ef8d9790) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0ef8d9790) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ef8d9790) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc05d3d1700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fc05e3d3700 (LWP 2946)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0ef38ef94) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0ef38ef40, cond=0x55f0ef38ef68) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0ef38ef68, mutex=0x55f0ef38ef40) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0ef38ef40) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0ef3b6330, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0ef3b6338, mutex=mutex@entry=0x55f0ef3b6330, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0ef3b6328) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0ef3b6290) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0ef3b6290) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ef3b6290) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc05e3d3700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fc0674d7700 (LWP 2911)):
#0  0x00007fc0c586f0b4 in __GI___libc_read (fd=61, buf=0x7fc0674d6b50, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc0bf73e2b0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bf6f90b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0bf6f9570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0bf6f96dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc0c61da7cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fc060000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fc0c6179d2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fc0674d6d60, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fc0c5f8a757 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:536
#8  0x00007fc06c735467 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ee4eab20) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc0674d7700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fc074f84700 (LWP 2903)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0ee420a20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0ee4209d0, cond=0x55f0ee4209f8) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0ee4209f8, mutex=0x55f0ee4209d0) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0ee4209d0) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0ee0051e0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0ee0051e8, mutex=mutex@entry=0x55f0ee0051e0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0ee0051d8) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0ee005140) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0ee005140) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ee005140) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc074f84700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fc075d8e700 (LWP 2894)):
#0  0x00007fc0bf73f629 in g_mutex_lock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fc0bf6f8995 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bf6f94fb in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0bf6f96dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0c61da7cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fc070000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007fc0c6179d2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fc075d8dda0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#6  0x00007fc0c5f8a757 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:536
#7  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ede501c0) at thread/qthread_unix.cpp:342
#8  0x00007fc0c2c0e6db in start_thread (arg=0x7fc075d8e700) at pthread_create.c:463
#9  0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fc094cc6700 (LWP 2744)):
#0  0x00007fc0c5873bf9 in __GI___poll (fds=0x7fc088009ab0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc0bf6f95c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bf6f96dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0c61da7cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fc088000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fc0c6179d2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fc094cc5d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fc0c5f8a757 in QThread::exec() (this=this@entry=0x7fc0a408a8e0) at thread/qthread.cpp:536
#6  0x00007fc0c9fd7b06 in QQuickPixmapReader::run() (this=0x7fc0a408a8e0) at util/qquickpixmapcache.cpp:987
#7  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x7fc0a408a8e0) at thread/qthread_unix.cpp:342
#8  0x00007fc0c2c0e6db in start_thread (arg=0x7fc094cc6700) at pthread_create.c:463
#9  0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fc09614a700 (LWP 2582)):
#0  0x00007fc0c2c149f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55f0ece77770) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fc0c2c149f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55f0ece77720, cond=0x55f0ece77748) at pthread_cond_wait.c:502
#2  0x00007fc0c2c149f3 in __pthread_cond_wait (cond=0x55f0ece77748, mutex=0x55f0ece77720) at pthread_cond_wait.c:655
#3  0x00007fc0c5f921db in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x55f0ece77720) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fc0c5f921db in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x55f0ed8a6ae0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fc0c5f92359 in QWaitCondition::wait(QMutex*, unsigned long) (this=this@entry=0x55f0ed8a6ae8, mutex=mutex@entry=0x55f0ed8a6ae0, time=time@entry=18446744073709551615) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fc0ca095233 in QSGRenderThreadEventQueue::takeEvent(bool) (wait=true, this=0x55f0ed8a6ad8) at scenegraph/qsgthreadedrenderloop.cpp:255
#7  0x00007fc0ca095233 in QSGRenderThread::processEventsAndWaitForMore() (this=this@entry=0x55f0ed8a6a40) at scenegraph/qsgthreadedrenderloop.cpp:905
#8  0x00007fc0ca095691 in QSGRenderThread::run() (this=0x55f0ed8a6a40) at scenegraph/qsgthreadedrenderloop.cpp:1000
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ed8a6a40) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc09614a700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc0aeb9f700 (LWP 1887)):
#0  0x00007fc0c586f0b4 in __GI___libc_read (fd=12, buf=0x7fc0aeb9eb70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fc0bf73e2b0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bf6f90b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0bf6f9570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fc0bf6f96dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fc0c61da7cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fc0a4000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fc0c6179d2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fc0aeb9ed80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fc0c5f8a757 in QThread::exec() (this=this@entry=0x55f0ec41d9a0) at thread/qthread.cpp:536
#8  0x00007fc0c9b41fc5 in QQmlThreadPrivate::run() (this=0x55f0ec41d9a0) at qml/ftw/qqmlthread.cpp:155
#9  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ec41d9a0) at thread/qthread_unix.cpp:342
#10 0x00007fc0c2c0e6db in start_thread (arg=0x7fc0aeb9f700) at pthread_create.c:463
#11 0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc0b4c79700 (LWP 1837)):
#0  0x00007fc0c5873bf9 in __GI___poll (fds=0x7fc0a8018610, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc0bf6f95c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fc0bf6f96dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fc0c61da7cb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fc0a8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fc0c6179d2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fc0b4c78d70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fc0c5f8a757 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:536
#6  0x00007fc0c7e88555 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x7fc0c8100da0) at thread/qthread_unix.cpp:342
#8  0x00007fc0c2c0e6db in start_thread (arg=0x7fc0b4c79700) at pthread_create.c:463
#9  0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc0b7073700 (LWP 1798)):
#0  0x00007fc0c5873bf9 in __GI___poll (fds=0x7fc0b7072ca8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fc0caca7747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fc0caca936a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fc0b9834fd0 in QXcbEventQueue::run() (this=0x55f0ec1ce750) at qxcbeventqueue.cpp:228
#4  0x00007fc0c5f8bc2c in QThreadPrivate::start(void*) (arg=0x55f0ec1ce750) at thread/qthread_unix.cpp:342
#5  0x00007fc0c2c0e6db in start_thread (arg=0x7fc0b7073700) at pthread_create.c:463
#6  0x00007fc0c588088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc0cc4a8140 (LWP 1767)):
[KCrash Handler]
#4  0x00007fc0c74b9b74 in QAction::isSeparator() const (this=0x55f0f18bc990) at kernel/qaction.cpp:697
#5  0x00007fc0c763c078 in QMenuPrivate::setCurrentAction(QAction*, int, QMenuPrivate::SelectionReason, bool) (this=this@entry=0x55f0ef3ca800, action=<optimized out>, popup=popup@entry=0, reason=reason@entry=QMenuPrivate::SelectedFromElsewhere, activateFirst=activateFirst@entry=false) at widgets/qmenu.cpp:663
#6  0x00007fc0c763eb26 in QMenuSloppyState::timeout() (this=0x55f0ef3caa58) at widgets/qmenu.cpp:854
#7  0x00007fc0c61ae4e3 in QObject::event(QEvent*) (this=this@entry=0x55f0f2168210, e=e@entry=0x7ffe070e88e0) at kernel/qobject.cpp:1361
#8  0x00007fc0c7500ad3 in QWidget::event(QEvent*) (this=this@entry=0x55f0f2168210, event=event@entry=0x7ffe070e88e0) at kernel/qwidget.cpp:9094
#9  0x00007fc0c7640c3b in QMenu::event(QEvent*) (this=0x55f0f2168210, e=0x7ffe070e88e0) at widgets/qmenu.cpp:3032
#10 0x00007fc0c74bf9ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x55f0ec1cc870, receiver=receiver@entry=0x55f0f2168210, e=e@entry=0x7ffe070e88e0) at kernel/qapplication.cpp:3685
#11 0x00007fc0c74c6bb0 in QApplication::notify(QObject*, QEvent*) (this=0x7ffe070e8c80, receiver=0x55f0f2168210, e=0x7ffe070e88e0) at kernel/qapplication.cpp:3431
#12 0x00007fc0c617b4a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f0f2168210, event=0x7ffe070e88e0) at kernel/qcoreapplication.cpp:1075
#13 0x00007fc0c61d9c39 in QTimerInfoList::activateTimers() (this=0x55f0ec22fc60) at kernel/qtimerinfo_unix.cpp:643
#14 0x00007fc0c61da439 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:183
#15 0x00007fc0c61da439 in idleTimerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:230
#16 0x00007fc0bf6f9417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007fc0bf6f9650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fc0bf6f96dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fc0c61da7ac in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55f0ec22f850, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#20 0x00007fc0c6179d2a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffe070e8b30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#21 0x00007fc0c61834a0 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1383
#22 0x000055f0ebd57894 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:228

The reporter indicates this bug may be a duplicate of or related to bug 392672.

Possible duplicates by query: bug 392672, bug 370000, bug 356970, bug 242368.

Reported using DrKonqi