Application: plasmashell (5.12.7)

Qt Version: 5.9.5
Frameworks Version: 5.44.0
Operating System: Linux 4.15.0-44-generic x86_64
Distribution: Ubuntu 18.04.1 LTS

-- Information about the crash:
I was constantly refreshing the wifi access points list to check when a certain one was going to vanish, since I unplugged the router broadcasting it. Then plasmashell just restarted on me (full blackscreen, seconds later desktop slowly starting re-appearing). I am filing a bug report as an in case it is something needing to be addressed, I couldn't get it to happen again by doing the same steps, unless I just didn't do it as long as before (just constant refresh's of the list, while scrolling the list). It might have just as well been too much running on my computer, such as program conflicts.

The crash does not seem to be reproducible.

-- 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 0x7fce9ff11800 (LWP 1579))]

Thread 19 (Thread 0x7fcd911fc700 (LWP 27414)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55621f14bfd4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55621f14bf80, cond=0x55621f14bfa8) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x55621f14bfa8, mutex=0x55621f14bf80) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcd911fc700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fcd91ffd700 (LWP 22991)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fce8402a460) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fce8402a410, cond=0x7fce8402a438) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x7fce8402a438, mutex=0x7fce8402a410) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcd91ffd700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fcd927fe700 (LWP 22904)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fcd8400e724) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fcd8400e6d0, cond=0x7fcd8400e6f8) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x7fcd8400e6f8, mutex=0x7fcd8400e6d0) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcd927fe700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fcd92fff700 (LWP 22903)):
#0  0x00007fce994eabf9 in __GI___poll (fds=0x7fcd84001b30, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fce8efdb451 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#2  0x00007fce8efcce10 in pa_mainloop_poll () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#3  0x00007fce8efcd4a0 in pa_mainloop_iterate () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#4  0x00007fce8efcd530 in pa_mainloop_run () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#5  0x00007fce8efdb399 in  () at /usr/lib/x86_64-linux-gnu/libpulse.so.0
#6  0x00007fce8e4392a8 in  () at /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-11.1.so
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcd92fff700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fcda0bfc700 (LWP 22902)):
#0  0x00007fce9409a064 in g_mutex_unlock () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fce9405445e in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fce99e3390b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fce99bf722a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fce9cd696f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fce98d7d6db in start_thread (arg=0x7fcda0bfc700) at pthread_create.c:463
#9  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fcda1bfd700 (LWP 19805)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55621a4130e4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55621a413090, cond=0x55621a4130b8) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x55621a4130b8, mutex=0x55621a413090) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcda1bfd700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fcda2ffe700 (LWP 7561)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556218c8ed20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x556218c8ecd0, cond=0x556218c8ecf8) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x556218c8ecf8, mutex=0x556218c8ecd0) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcda2ffe700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fcda3fff700 (LWP 2911)):
[KCrash Handler]
#6  0x00007fce9d950640 in QSGSimpleTextureNode::texture() const () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fcde765f963 in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/kquickcontrolsaddons/libkquickcontrolsaddonsplugin.so
#8  0x00007fce99e096cf in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fce9d9d2a30 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007fce9d97dbbc in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007fce9d982ac8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fce98d7d6db in start_thread (arg=0x7fcda3fff700) at pthread_create.c:463
#14 0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fcdbd6b8700 (LWP 2046)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55621a677d94) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55621a677d40, cond=0x55621a677d68) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x55621a677d68, mutex=0x55621a677d40) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcdbd6b8700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fcdbdeb9700 (LWP 1759)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556221761824) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5562217617d0, cond=0x5562217617f8) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x5562217617f8, mutex=0x5562217617d0) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcdbdeb9700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fcdc5af1700 (LWP 1756)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55621be85e70) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55621be85e20, cond=0x55621be85e48) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x55621be85e48, mutex=0x55621be85e20) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcdc5af1700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fcdc8177700 (LWP 1752)):
#0  0x00007fce994eabf9 in __GI___poll (fds=0x7fcdc0003ce0, nfds=1, timeout=1620136) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fce94054539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fce99e3390b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fce99bf722a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fcdcaad3747 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fce98d7d6db in start_thread (arg=0x7fcdc8177700) at pthread_create.c:463
#9  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fcddf02b700 (LWP 1731)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556219397c00) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x556219397bb0, cond=0x556219397bd8) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x556219397bd8, mutex=0x556219397bb0) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d9826a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d982b0a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce98d7d6db in start_thread (arg=0x7fcddf02b700) at pthread_create.c:463
#8  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fcde4dd1700 (LWP 1727)):
#0  0x00007fce994eabf9 in __GI___poll (fds=0x7fcde0005350, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fce94054539 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fce99e3390b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fce99bf722a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fce9d9032a6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fce98d7d6db in start_thread (arg=0x7fcde4dd1700) at pthread_create.c:463
#9  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fce79532700 (LWP 1635)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fce9f8d8fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x7fce9f8d8f68, cond=0x7fce9f8d8f90) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x7fce9f8d8f90, mutex=0x7fce9f8d8f68) at pthread_cond_wait.c:655
#3  0x00007fce9f5e25f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007fce9f5e2639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007fce98d7d6db in start_thread (arg=0x7fce79532700) at pthread_create.c:463
#6  0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fce7b9a9700 (LWP 1633)):
#0  0x00007fce994e60b4 in __GI___libc_read (fd=11, buf=0x7fce7b9a8b70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fce94098cd0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fce94054027 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fce940544e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fce99e3390b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce99bf722a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fce9cd696f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fce98d7d6db in start_thread (arg=0x7fce7b9a9700) at pthread_create.c:463
#11 0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fce81c18700 (LWP 1613)):
#0  0x00007fce994e60b4 in __GI___libc_read (fd=10, buf=0x7fce81c17b70, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fce94098cd0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fce94054027 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fce940544e0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fce99e3390b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fce99bf722a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fce9cd696f5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fce98d7d6db in start_thread (arg=0x7fce81c18700) at pthread_create.c:463
#11 0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fce8365d700 (LWP 1596)):
#0  0x00007fce99e331d5 in QElapsedTimer::clockType() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#1  0x00007fce99e331e9 in QElapsedTimer::isMonotonic() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fce99e31fce in QTimerInfoList::repairTimersIfNeeded() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fce99e32043 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce99e3367e in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fce94053a98 in g_main_context_prepare () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007fce9405446b in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007fce99e3390b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007fce99bf722a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fce9a2b0d45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#12 0x00007fce99bfc16d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fce98d7d6db in start_thread (arg=0x7fce8365d700) at pthread_create.c:463
#14 0x00007fce994f788f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fce9ff11800 (LWP 1579)):
#0  0x00007fce98d839f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55621a7973a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fce98d839f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x55621a797350, cond=0x55621a797378) at pthread_cond_wait.c:502
#2  0x00007fce98d839f3 in __pthread_cond_wait (cond=0x55621a797378, mutex=0x55621a797350) at pthread_cond_wait.c:655
#3  0x00007fce99bfd59b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fce9d97ee7d in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007fce9d97fc52 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007fce9d9dc726 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fce9f916323 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#8  0x00007fce9ade282c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007fce9adea0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007fce99dda9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fce9a632141 in QWindowPrivate::deliverUpdateRequest() () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007fce9a632659 in QWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007fce9d9dc6c5 in QQuickWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007fce9f916323 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5PlasmaQuick.so.5
#15 0x00007fce9ade282c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007fce9adea0f4 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#17 0x00007fce99dda9a8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fce99e32d8e in QTimerInfoList::activateTimers() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fce99e33551 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fce94054387 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007fce940545c0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007fce9405464c in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007fce99e338ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007fce99dd89ea in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007fce99de1a84 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x0000556217070cfa in  ()
#27 0x00007fce993f7b97 in __libc_start_main (main=0x556217070320, argc=1, argv=0x7fff85c8fda8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff85c8fd98) at ../csu/libc-start.c:310
#28 0x000055621707109a in _start ()

Reported using DrKonqi