Application: plasmashell (5.14.5)

Qt Version: 5.11.3
Frameworks Version: 5.58.0
Operating System: Linux 5.2.7-100.fc29.x86_64 x86_64
Distribution: "redhat release 7"

-- Information about the crash:
If I try to print anything from anywhere (browser, acroread, etc.) KDE crashes; the background goes black, the panel disappears, etc.).  It all comes back in a second or two, however.

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
29	  return SYSCALL_CANCEL (poll, fds, nfds, timeout);
[Current thread is 1 (Thread 0x7fe812ae8580 (LWP 10551))]

Thread 7 (Thread 0x7fe7f0e71700 (LWP 11202)):
#0  0x00007fe815e1cfe4 in __GI___libc_read (nbytes=16, buf=0x7fe7f0e709b0, fd=17) at ../sysdeps/unix/sysv/linux/read.c:26
#1  0x00007fe815e1cfe4 in __GI___libc_read (fd=17, buf=0x7fe7f0e709b0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007fe8131d1e90 in  () at /lib64/libglib-2.0.so.0
#3  0x00007fe81318ae9b in g_main_context_check () at /lib64/libglib-2.0.so.0
#4  0x00007fe81318b350 in  () at /lib64/libglib-2.0.so.0
#5  0x00007fe81318b4d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#6  0x00007fe8164d085b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007fe81647f3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#8  0x00007fe8162e6d36 in QThread::exec() () at /lib64/libQt5Core.so.5
#9  0x00007fe7f1664d9b in KCupsConnection::run() () at /lib64/libkcupslib.so
#10 0x00007fe8162f019b in  () at /lib64/libQt5Core.so.5
#11 0x00007fe8159d458e in start_thread (arg=<optimized out>) at pthread_create.c:486
#12 0x00007fe815e2c713 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fe7f2249700 (LWP 11062)):
#0  0x00007fe815e21481 in __GI___poll (fds=0x7fe7e8005140, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe81318b3a6 in  () at /lib64/libglib-2.0.so.0
#2  0x00007fe81318b4d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fe8164d085b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fe81647f3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fe8162e6d36 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fe81830053a in  () at /lib64/libQt5Quick.so.5
#7  0x00007fe8162f019b in  () at /lib64/libQt5Core.so.5
#8  0x00007fe8159d458e in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe815e2c713 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe7fce9d700 (LWP 10881)):
#0  0x00007fe8159da72c in futex_wait_cancelable (private=0, expected=0, futex_word=0x55d0860be018) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fe8159da72c in __pthread_cond_wait_common (abstime=0x0, mutex=0x55d0860bdfc8, cond=0x55d0860bdff0) at pthread_cond_wait.c:502
#2  0x00007fe8159da72c in __pthread_cond_wait (cond=0x55d0860bdff0, mutex=0x55d0860bdfc8) at pthread_cond_wait.c:655
#3  0x00007fe7fd2898bb in  () at /usr/lib64/dri/i965_dri.so
#4  0x00007fe7fd2895fb in  () at /usr/lib64/dri/i965_dri.so
#5  0x00007fe8159d458e in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe815e2c713 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe7ff5ef700 (LWP 10835)):
#0  0x00007fe8164d07b4 in  () at /lib64/libQt5Core.so.5
#1  0x00007fe81318a8e9 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007fe81318b2db in  () at /lib64/libglib-2.0.so.0
#3  0x00007fe81318b4d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fe8164d085b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fe81647f3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007fe8162e6d36 in QThread::exec() () at /lib64/libQt5Core.so.5
#7  0x00007fe81806df59 in  () at /lib64/libQt5Qml.so.5
#8  0x00007fe8162f019b in  () at /lib64/libQt5Core.so.5
#9  0x00007fe8159d458e in start_thread (arg=<optimized out>) at pthread_create.c:486
#10 0x00007fe815e2c713 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe804b05700 (LWP 10744)):
#0  0x00007fe815e21481 in __GI___poll (fds=0x7fe7f8004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe81318b3a6 in  () at /lib64/libglib-2.0.so.0
#2  0x00007fe81318b4d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fe8164d085b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007fe81647f3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007fe8162e6d36 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007fe816cb4f89 in  () at /lib64/libQt5DBus.so.5
#7  0x00007fe8162f019b in  () at /lib64/libQt5Core.so.5
#8  0x00007fe8159d458e in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007fe815e2c713 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe805673700 (LWP 10563)):
#0  0x00007fe815e21481 in __GI___poll (fds=0x7fe805672b38, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fe81876139f in  () at /lib64/libxcb.so.1
#2  0x00007fe81876301a in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007fe8059be459 in  () at /lib64/libQt5XcbQpa.so.5
#4  0x00007fe8162f019b in  () at /lib64/libQt5Core.so.5
#5  0x00007fe8159d458e in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007fe815e2c713 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe812ae8580 (LWP 10551)):
[KCrash Handler]
#6  0x00007fe7f168455c in JobModel::updateJob(int, KCupsJob const&) () at /lib64/libkcupslib.so
#7  0x00007fe7f1686528 in JobModel::insertJob(int, KCupsJob const&) () at /lib64/libkcupslib.so
#8  0x00007fe7f16869e9 in JobModel::getJobFinished(KCupsRequest*) () at /lib64/libkcupslib.so
#9  0x00007fe8164a9e16 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#10 0x00007fe816f382a5 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#11 0x00007fe816f3f800 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#12 0x00007fe816480496 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#13 0x00007fe81648366b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#14 0x00007fe8164d0ab7 in  () at /lib64/libQt5Core.so.5
#15 0x00007fe81318b06d in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#16 0x00007fe81318b438 in  () at /lib64/libglib-2.0.so.0
#17 0x00007fe81318b4d0 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#18 0x00007fe8164d0843 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#19 0x00007fe805a553f5 in  () at /lib64/libQt5XcbQpa.so.5
#20 0x00007fe81647f3db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#21 0x00007fe816487386 in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#22 0x000055d0856e06cf in  ()
#23 0x00007fe815d53413 in __libc_start_main (main=0x55d0856dfbc0, argc=1, argv=0x7fff925b7e78, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff925b7e68) at ../csu/libc-start.c:308
#24 0x000055d0856e0b4e in _start ()
[Inferior 1 (process 10551) detached]

Possible duplicates by query: bug 410570, bug 410509.

Reported using DrKonqi