Bug 375983

Application: plasmashell (5.9.0)

Qt Version: 5.8.0
Frameworks Version: 5.30.0
Operating System: Linux 4.9.6-1-ARCH x86_64
Distribution: "Arch Linux"

-- Information about the crash:
- What I was doing when the application crashed:
Crash occurs when starting plasmashell manually or logging in via sddm
- Unusual behavior I noticed:
plasmashell crashes, the desktop goes black but some things (alt-f2 menu and app switcher) still work as expected.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fe2d288e800 (LWP 1429))]

Thread 8 (Thread 0x7fe209134700 (LWP 1438)):
#0  0x00007fe2c6daa77c in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007fe2c6dacc2b in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe2c6dad6ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe2c6dad89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe2cc8b246b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe2cc85bc9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fe2cc67da73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fe20ba060a7 in KCupsConnection::run() () at /usr/lib/libkcupslib.so
#8  0x00007fe2cc6826d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7fe21d34d700 (LWP 1436)):
#0  0x00007fe2c6daa742 in  () at /usr/lib/libglib-2.0.so.0
#1  0x00007fe2c6dacc2b in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe2c6dad6ab in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe2c6dad89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe2cc8b246b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe2cc85bc9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fe2cc67da73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#7  0x00007fe2d036dfd6 in  () at /usr/lib/libQt5Quick.so.5
#8  0x00007fe2cc6826d8 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7fe2a7fff700 (LWP 1434)):
#0  0x00007fe2cb55310f in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007fe2d2063234 in  () at /usr/lib/libQt5Script.so.5
#2  0x00007fe2d2063279 in  () at /usr/lib/libQt5Script.so.5
#3  0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7fe2b2588700 (LWP 1433)):
#0  0x00007fe2cbf8e48d in poll () at /usr/lib/libc.so.6
#1  0x00007fe2c6dad786 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe2c6dad89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe2cc8b246b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fe2cc85bc9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe2cc67da73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fe2cf7b9025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fe2cc6826d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7fe2b3fff700 (LWP 1432)):
#0  0x00007fe2c6df2db9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fe2c6dad76b in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fe2c6dad89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe2cc8b246b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fe2cc85bc9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fe2cc67da73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fe2cf7b9025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fe2cc6826d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7fe2ba0f4700 (LWP 1431)):
#0  0x00007fe2cc6798a9 in QMutex::lock() () at /usr/lib/libQt5Core.so.5
#1  0x00007fe2cc8b1bdf in  () at /usr/lib/libQt5Core.so.5
#2  0x00007fe2c6dacc89 in g_main_context_prepare () at /usr/lib/libglib-2.0.so.0
#3  0x00007fe2c6dad6ab in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007fe2c6dad89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007fe2cc8b246b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007fe2cc85bc9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007fe2cc67da73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007fe2cd402125 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007fe2cc6826d8 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fe2bbd4d700 (LWP 1430)):
#0  0x00007fe2cbf8e48d in poll () at /usr/lib/libc.so.6
#1  0x00007fe2d0f898e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007fe2d0f8b679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007fe2bdc8c239 in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007fe2cc6826d8 in  () at /usr/lib/libQt5Core.so.5
#5  0x00007fe2cb54d454 in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007fe2cbf977df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fe2d288e800 (LWP 1429)):
[KCrash Handler]
#6  0x00007fe20ba2a356 in JobModel::updateJob(int, KCupsJob const&) () at /usr/lib/libkcupslib.so
#7  0x00007fe20ba2ebc3 in JobModel::getJobFinished() () at /usr/lib/libkcupslib.so
#8  0x00007fe20ba334e5 in  () at /usr/lib/libkcupslib.so
#9  0x00007fe2cc889fa9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#10 0x00007fe2cd7cb34c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#11 0x00007fe2cd7d2b61 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#12 0x00007fe2cc85d840 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#13 0x00007fe2cc85ffcd in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#14 0x00007fe2cc8b2043 in  () at /usr/lib/libQt5Core.so.5
#15 0x00007fe2c6dad587 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#16 0x00007fe2c6dad7f0 in  () at /usr/lib/libglib-2.0.so.0
#17 0x00007fe2c6dad89c in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#18 0x00007fe2cc8b244f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007fe2cc85bc9a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x00007fe2cc8641e4 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#21 0x000000000041c952 in  ()
#22 0x00007fe2cbecf291 in __libc_start_main () at /usr/lib/libc.so.6
#23 0x000000000041ccda in _start ()

Reported using DrKonqi