Application: plasmashell (5.16.4)

Qt Version: 5.12.3
Frameworks Version: 5.60.0
Operating System: Linux 4.15.0-55-generic x86_64
Distribution: KDE neon User Edition 5.16

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

If I install cups, plasma craches immediately.
I have to deinstall cups AND reinstall libcups2

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 0x7f8ca0bc6880 (LWP 5710))]

Thread 11 (Thread 0x7f8c3ee94700 (LWP 6142)):
#0  0x00007f8c99fde0b4 in __GI___libc_read (fd=29, buf=0x7f8c3ee93ad0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007f8c93e8d2d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8c93e480b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8c93e48570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f8c93e486dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f8c9a925dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8c9a8c703a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8c9a6ee4ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c3f55f197 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8c972026db in start_thread (arg=0x7f8c3ee94700) at pthread_create.c:463
#11 0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f8c47b96700 (LWP 6118)):
#0  0x00007f8c99fe2bf9 in __GI___poll (fds=0x7f8c40004a70, nfds=1, timeout=9727) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8c93e485c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8c93e486dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8c9a925dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a8c703a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9a6ee4ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f8c972026db in start_thread (arg=0x7f8c47b96700) at pthread_create.c:463
#8  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f8c66328700 (LWP 5962)):
#0  0x00007f8c99fe2bf9 in __GI___poll (fds=0x7f8c5000b1a0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8c93e485c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8c93e486dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8c9a925dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a8c703a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9a6ee4ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8c9e9c0926 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c972026db in start_thread (arg=0x7f8c66328700) at pthread_create.c:463
#9  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f8c66bb5700 (LWP 5958)):
#0  0x00007f8c972089f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5590e94eb0a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8c972089f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5590e94eb050, cond=0x5590e94eb078) at pthread_cond_wait.c:502
#2  0x00007f8c972089f3 in __pthread_cond_wait (cond=0x5590e94eb078, mutex=0x5590e94eb050) at pthread_cond_wait.c:655
#3  0x00007f8c9a6f6dbb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a6f70c9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9ea466f8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8c9ea46b2a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c972026db in start_thread (arg=0x7f8c66bb5700) at pthread_create.c:463
#9  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f8c6744c700 (LWP 5956)):
#0  0x00007f8c972089f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5590e6019524) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8c972089f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5590e60194d0, cond=0x5590e60194f8) at pthread_cond_wait.c:502
#2  0x00007f8c972089f3 in __pthread_cond_wait (cond=0x5590e60194f8, mutex=0x5590e60194d0) at pthread_cond_wait.c:655
#3  0x00007f8c9a6f6dbb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a6f70c9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9ea466f8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8c9ea46b2a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c972026db in start_thread (arg=0x7f8c6744c700) at pthread_create.c:463
#9  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f8c67d34700 (LWP 5950)):
#0  0x00007f8c972089f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5590e7985eb4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8c972089f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5590e7985e60, cond=0x5590e7985e88) at pthread_cond_wait.c:502
#2  0x00007f8c972089f3 in __pthread_cond_wait (cond=0x5590e7985e88, mutex=0x5590e7985e60) at pthread_cond_wait.c:655
#3  0x00007f8c9a6f6dbb in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a6f70c9 in QWaitCondition::wait(QMutex*, unsigned long) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9ea466f8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f8c9ea46b2a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c972026db in start_thread (arg=0x7f8c67d34700) at pthread_create.c:463
#9  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f8c75409700 (LWP 5931)):
#0  0x00007f8c972089f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5590e634fc18) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007f8c972089f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x5590e634fbc8, cond=0x5590e634fbf0) at pthread_cond_wait.c:502
#2  0x00007f8c972089f3 in __pthread_cond_wait (cond=0x5590e634fbf0, mutex=0x5590e634fbc8) at pthread_cond_wait.c:655
#3  0x00007f8c75fec31a in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007f8c75fec047 in  () at /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007f8c972026db in start_thread (arg=0x7f8c75409700) at pthread_create.c:463
#6  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f8c83bf2700 (LWP 5903)):
#0  0x00007f8c99fe2bf9 in __GI___poll (fds=0x7f8c78004a00, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8c93e485c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8c93e486dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8c9a925dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a8c703a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9a6ee4ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8c9e4fb115 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c972026db in start_thread (arg=0x7f8c83bf2700) at pthread_create.c:463
#9  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f8c896ae700 (LWP 5817)):
#0  0x00007f8c99fe2bf9 in __GI___poll (fds=0x7f8c7c014530, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8c93e485c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8c93e486dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8c9a925dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f8c9a8c703a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c9a6ee4ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f8c9b9d1015 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f8c972026db in start_thread (arg=0x7f8c896ae700) at pthread_create.c:463
#9  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f8c8b88a700 (LWP 5721)):
#0  0x00007f8c99fe2bf9 in __GI___poll (fds=0x7f8c8b889c28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f8c9f618747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f8c9f61a36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f8c8dc33578 in  () at /usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f8c9a6efc72 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f8c972026db in start_thread (arg=0x7f8c8b88a700) at pthread_create.c:463
#6  0x00007f8c99fef88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f8ca0bc6880 (LWP 5710)):
[KCrash Handler]
#6  0x00007f8c3f57ec80 in JobModel::updateJob(int, KCupsJob const&) () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007f8c3f580e68 in JobModel::insertJob(int, KCupsJob const&) () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007f8c3f58146b in JobModel::getJobFinished(KCupsRequest*) () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007f8c9a8f93e2 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f8c9c22865c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x5590e5de6d10, receiver=receiver@entry=0x5590eb08a6e0, e=e@entry=0x7f8c3801cf90) at kernel/qapplication.cpp:3736
#11 0x00007f8c9c22fb90 in QApplication::notify(QObject*, QEvent*) (this=0x7ffccd720ff0, receiver=0x5590eb08a6e0, e=0x7f8c3801cf90) at kernel/qapplication.cpp:3483
#12 0x00007f8c9a8c8d18 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f8c9a8cb8d7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f8c9a926793 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f8c93e48417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f8c93e48650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f8c93e486dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f8c9a925daf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007f8c9a8c703a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f8c9a8d0170 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00005590e4c2cf3f in  ()
#22 0x00007f8c99eefb97 in __libc_start_main (main=0x5590e4c2c3d0, argc=1, argv=0x7ffccd7211a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffccd721198) at ../csu/libc-start.c:310
#23 0x00005590e4c2d3ca in _start ()

Reported using DrKonqi