Application: plasmashell (5.12.3)

Qt Version: 5.9.2
Frameworks Version: 5.42.0
Operating System: Linux 4.14.0-3-amd64 x86_64
Distribution: Debian GNU/Linux testing (buster)

-- Information about the crash:
- What I was doing when the application crashed:

Clicked on "Add Widgets..." button on panel after unlock widgets.

The crash can be reproduced every time.

-- 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 0x7efd8da5f600 (LWP 1536))]

Thread 15 (Thread 0x7efc91968700 (LWP 1884)):
[KCrash Handler]
#6  0x00007efd85f6cea0 in wl_proxy_create_wrapper () at /usr/lib/x86_64-linux-gnu/libwayland-client.so.0
#7  0x00007efce3be1d54 in  () at /usr/lib/x86_64-linux-gnu/libEGL_mesa.so.0
#8  0x00007efce3bcf8f7 in  () at /usr/lib/x86_64-linux-gnu/libEGL_mesa.so.0
#9  0x00007efd6c37903d in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/wayland-graphics-integration-client/libwayland-egl.so
#10 0x00007efd6c3775b5 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/wayland-graphics-integration-client/libwayland-egl.so
#11 0x00007efd881b24e6 in QOpenGLContext::makeCurrent(QSurface*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007efd8b4d59a4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#13 0x00007efd8b4dd2ab in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007efd8b4dc537 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#15 0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#16 0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007efd869695aa in start_thread (arg=0x7efc91968700) at pthread_create.c:463
#18 0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7efcd11fc700 (LWP 1883)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c5e442d94) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c5e442d40, cond=0x561c5e442d68) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c5e442d68, mutex=0x561c5e442d40) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4dc4a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd869695aa in start_thread (arg=0x7efcd11fc700) at pthread_create.c:463
#8  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7efc92aa4700 (LWP 1882)):
#0  0x00007efd870ab094 in __GI___libc_read (fd=39, buf=0x7efc92aa3b30, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007efd81a59230 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efd81a14c07 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efd81a150c0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007efd879e510b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd877a935a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007efd8a8c20a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007efd869695aa in start_thread (arg=0x7efc92aa4700) at pthread_create.c:463
#11 0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7efcd19fd700 (LWP 1871)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7efcc405a470) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7efcc405a420, cond=0x7efcc405a448) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x7efcc405a448, mutex=0x7efcc405a420) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4dc4a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd869695aa in start_thread (arg=0x7efcd19fd700) at pthread_create.c:463
#8  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7efca90ac700 (LWP 1849)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c5ce67260) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c5ce67210, cond=0x561c5ce67238) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c5ce67238, mutex=0x561c5ce67210) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4dc4a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd869695aa in start_thread (arg=0x7efca90ac700) at pthread_create.c:463
#8  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7efca9d55700 (LWP 1848)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c5b82ee00) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c5b82edb0, cond=0x561c5b82edd8) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c5b82edd8, mutex=0x561c5b82edb0) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4dc4a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd869695aa in start_thread (arg=0x7efca9d55700) at pthread_create.c:463
#8  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7efcb0cd9700 (LWP 1840)):
#0  0x00007ffd99ff7afb in clock_gettime ()
#1  0x00007efd870c7696 in __GI___clock_gettime (clock_id=1, tp=0x7efcb0cd8b00) at ../sysdeps/unix/clock_gettime.c:115
#2  0x00007efd879e4a21 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007efd879e3259 in QTimerInfoList::updateCurrentTime() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd879e5865 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efd81a14b39 in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007efd81a150c0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7  0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007efd879e510b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007efd877a935a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007efcb36514b7 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#12 0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007efd869695aa in start_thread (arg=0x7efcb0cd9700) at pthread_create.c:463
#14 0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7efcd29fe700 (LWP 1800)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c5926a270) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c5926a220, cond=0x561c5926a248) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c5926a248, mutex=0x561c5926a220) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4dc4a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd869695aa in start_thread (arg=0x7efcd29fe700) at pthread_create.c:463
#8  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7efcd3fff700 (LWP 1799)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c581465c0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c58146570, cond=0x561c58146598) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c58146598, mutex=0x561c58146570) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4dc4a8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4dc90a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007efd869695aa in start_thread (arg=0x7efcd3fff700) at pthread_create.c:463
#8  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7efcd905b700 (LWP 1704)):
#0  0x00007efd870af5d9 in __GI___poll (fds=0x7efcd4005170, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efd81a15119 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efd879e510b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efd877a935a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efd8b45d1c6 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007efd869695aa in start_thread (arg=0x7efcd905b700) at pthread_create.c:463
#9  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7efd6cd80700 (LWP 1681)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7efd8d445fb8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x7efd8d445f68, cond=0x7efd8d445f90) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x7efd8d445f90, mutex=0x7efd8d445f68) at pthread_cond_wait.c:655
#3  0x00007efd8d14f5f4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007efd8d14f639 in  () at /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007efd869695aa in start_thread (arg=0x7efd6cd80700) at pthread_create.c:463
#6  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7efd6f3c0700 (LWP 1678)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c57961a50) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c57961a00, cond=0x561c57961a28) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c57961a28, mutex=0x561c57961a00) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8a8c27de in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#5  0x00007efd8a8948e4 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007efd8a896261 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007efd8a896e7d in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#8  0x00007efd8a8970f7 in QQmlImports::addLibraryImport(QQmlImportDatabase*, QString const&, QString const&, int, int, QString const&, QString const&, bool, QList<QQmlError>*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007efd8a857b95 in QQmlTypeLoader::Blob::addImport(QV4::CompiledData::Import const*, QList<QQmlError>*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#10 0x00007efd8a85844e in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#11 0x00007efd8a85aaac in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#12 0x00007efd8a851a0d in QQmlTypeLoader::setData(QQmlDataBlob*, QQmlDataBlob::SourceCodeData const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#13 0x00007efd8a852265 in QQmlTypeLoader::setData(QQmlDataBlob*, QString const&) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#14 0x00007efd8a85321b in QQmlTypeLoader::loadThread(QQmlDataBlob*) () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#15 0x00007efd8a85338d in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#16 0x00007efd8a8c2404 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#17 0x00007efd8a8c2a9a in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#18 0x00007efd8893263c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007efd88939f04 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007efd8798c258 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007efd8798e9cd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007efd879e5ac3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007efd81a14f67 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007efd81a151a0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007efd879e50ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007efd877a935a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007efd8a8c20a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#30 0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007efd869695aa in start_thread (arg=0x7efd6f3c0700) at pthread_create.c:463
#32 0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7efd74f59700 (LWP 1584)):
#0  0x00007efd870af5d9 in __GI___poll (fds=0x7efd68004e00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007efd81a15119 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efd879e510b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efd877a935a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efd8a8c20a5 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007efd869695aa in start_thread (arg=0x7efd74f59700) at pthread_create.c:463
#9  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7efd7698f700 (LWP 1550)):
#0  0x00007efd81a5a569 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007efd81a150ff in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007efd879e510b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007efd877a935a in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007efd87e02e45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007efd877ae22d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007efd869695aa in start_thread (arg=0x7efd7698f700) at pthread_create.c:463
#9  0x00007efd870b9cbf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7efd8da5f600 (LWP 1536)):
#0  0x00007efd8696f4ec in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x561c5ea2c9e4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007efd8696f4ec in __pthread_cond_wait_common (abstime=0x0, mutex=0x561c5ea2c990, cond=0x561c5ea2c9b8) at pthread_cond_wait.c:502
#2  0x00007efd8696f4ec in __pthread_cond_wait (cond=0x561c5ea2c9b8, mutex=0x561c5ea2c990) at pthread_cond_wait.c:655
#3  0x00007efd877af65b in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007efd8b4da972 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5  0x00007efd8b4daf0b in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007efd8b52c638 in QQuickWindow::~QQuickWindow() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007efce0fa281d in  () at /usr/lib/x86_64-linux-gnu/qt5/qml/org/kde/plasma/core/libcorebindingsplugin.so
#8  0x00007efd879b893b in QObjectPrivate::deleteChildren() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007efd879c21cb in QObject::~QObject() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007efd8b51fd05 in QQuickItem::~QQuickItem() () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#11 0x00007efd8b53b215 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#12 0x00007efd879bb8e0 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007efd8b51d1eb in QQuickItem::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#14 0x00007efd8893263c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007efd88939f04 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007efd8798c258 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007efd8798e9cd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007efd879e5ac3 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007efd81a14f67 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007efd81a151a0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007efd81a1522c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007efd879e50ef in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007efd8798a2aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#24 0x00007efd87993214 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x0000561c5601dcfa in  ()
#26 0x00007efd86fe4a87 in __libc_start_main (main=0x561c5601d320, argc=1, argv=0x7ffd99fb4368, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd99fb4358) at ../csu/libc-start.c:310
#27 0x0000561c5601e09a in _start ()

Reported using DrKonqi