Application: plasmashell (5.16.5)

Qt Version: 5.12.3
Frameworks Version: 5.61.0
Operating System: Linux 4.15.0-62-generic x86_64
Distribution: KDE neon User Edition 5.16

-- Information about the crash:
It also crashes if I ran the commands: kquitapp5 plasmashell ; kstart5 plasmashell

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 0x7fb69ceed880 (LWP 1654))]

Thread 7 (Thread 0x7fb648e97700 (LWP 2539)):
#0  0x00007fb696313bf9 in __GI___poll (fds=0x7fb644006070, nfds=1, timeout=3472451) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb6901785c9 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb6901786dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb696c56dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb644000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fb696bf803a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb648e96ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5  0x00007fb696a1f4ca in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#6  0x00007fb64b7f5197 in KCupsConnection::run() () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fb696a20c72 in QThreadPrivate::start(void*) (arg=0x564c3b052040) at thread/qthread_unix.cpp:361
#8  0x00007fb6935336db in start_thread (arg=0x7fb648e97700) at pthread_create.c:463
#9  0x00007fb69632088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb663fff700 (LWP 2501)):
#0  0x00007fb69630f0b4 in __GI___libc_read (fd=36, buf=0x7fb663ffeaa0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fb6901bd2d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb6901780b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb690178570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb6901786dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb696c56dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb65c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fb696bf803a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb663ffecb0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fb696a1f4ca in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007fb69acf5926 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9  0x00007fb696a20c72 in QThreadPrivate::start(void*) (arg=0x564c39bcdd40) at thread/qthread_unix.cpp:361
#10 0x00007fb6935336db in start_thread (arg=0x7fb663fff700) at pthread_create.c:463
#11 0x00007fb69632088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb66c1b9700 (LWP 2454)):
#0  0x00007fb6935399f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x564c3a405674) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  0x00007fb6935399f3 in __pthread_cond_wait_common (abstime=0x0, mutex=0x564c3a405620, cond=0x564c3a405648) at pthread_cond_wait.c:502
#2  0x00007fb6935399f3 in __pthread_cond_wait (cond=0x564c3a405648, mutex=0x564c3a405620) at pthread_cond_wait.c:655
#3  0x00007fb696a27dbb in QWaitConditionPrivate::wait(QDeadlineTimer) (deadline=..., this=0x564c3a405620) at thread/qwaitcondition_unix.cpp:146
#4  0x00007fb696a27dbb in QWaitCondition::wait(QMutex*, QDeadlineTimer) (this=<optimized out>, mutex=0x564c3a43bbc0, deadline=...) at thread/qwaitcondition_unix.cpp:225
#5  0x00007fb696a280c9 in QWaitCondition::wait(QMutex*, unsigned long) (this=0x564c3a43bbc8, mutex=0x564c3a43bbc0, time=<optimized out>) at thread/qwaitcondition_unix.cpp:208
#6  0x00007fb69ad7b6f8 in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fb69ad7bb2a in  () at /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007fb696a20c72 in QThreadPrivate::start(void*) (arg=0x564c3a43bb40) at thread/qthread_unix.cpp:361
#9  0x00007fb6935336db in start_thread (arg=0x7fb66c1b9700) at pthread_create.c:463
#10 0x00007fb69632088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb67fbf2700 (LWP 1705)):
#0  0x00007fb69630f0b4 in __GI___libc_read (fd=10, buf=0x7fb67fbf1af0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fb6901bd2d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb6901780b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb690178570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb6901786dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb696c56dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb674000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fb696bf803a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb67fbf1d00, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fb696a1f4ca in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007fb69a830115 in  () at /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007fb696a20c72 in QThreadPrivate::start(void*) (arg=0x564c39c0e9a0) at thread/qthread_unix.cpp:361
#10 0x00007fb6935336db in start_thread (arg=0x7fb67fbf2700) at pthread_create.c:463
#11 0x00007fb69632088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb685900700 (LWP 1702)):
#0  0x00007fb69630f0b4 in __GI___libc_read (fd=7, buf=0x7fb6858ffae0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1  0x00007fb6901bd2d0 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb6901780b7 in g_main_context_check () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb690178570 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007fb6901786dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007fb696c56dcb in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fb678000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6  0x00007fb696bf803a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fb6858ffcf0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7  0x00007fb696a1f4ca in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:531
#8  0x00007fb697d02015 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fb696a20c72 in QThreadPrivate::start(void*) (arg=0x7fb697f79d80) at thread/qthread_unix.cpp:361
#10 0x00007fb6935336db in start_thread (arg=0x7fb685900700) at pthread_create.c:463
#11 0x00007fb69632088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb687adc700 (LWP 1672)):
#0  0x00007fb696313bf9 in __GI___poll (fds=0x7fb687adbc28, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007fb69b94d747 in  () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb69b94f36a in xcb_wait_for_event () at /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb689e85578 in QXcbEventQueue::run() (this=0x564c39b2d750) at qxcbeventqueue.cpp:228
#4  0x00007fb696a20c72 in QThreadPrivate::start(void*) (arg=0x564c39b2d750) at thread/qthread_unix.cpp:361
#5  0x00007fb6935336db in start_thread (arg=0x7fb687adc700) at pthread_create.c:463
#6  0x00007fb69632088f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb69ceed880 (LWP 1654)):
[KCrash Handler]
#6  0x00007fb64b814c80 in JobModel::updateJob(int, KCupsJob const&) () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fb64b816e68 in JobModel::insertJob(int, KCupsJob const&) () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#8  0x00007fb64b81746b in JobModel::getJobFinished(KCupsRequest*) () at /usr/lib/x86_64-linux-gnu/libkcupslib.so
#9  0x00007fb696c2a3e2 in QObject::event(QEvent*) (this=0x564c3b058150, e=<optimized out>) at kernel/qobject.cpp:1260
#10 0x00007fb69855965c in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x564c39b0f8e0, receiver=receiver@entry=0x564c3b058150, e=e@entry=0x7fb644017a10) at kernel/qapplication.cpp:3736
#11 0x00007fb698560b90 in QApplication::notify(QObject*, QEvent*) (this=0x7fffba1aa890, receiver=0x564c3b058150, e=0x7fb644017a10) at kernel/qapplication.cpp:3483
#12 0x00007fb696bf9d18 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x564c3b058150, event=0x7fb644017a10) at kernel/qcoreapplication.cpp:1060
#13 0x00007fb696bf9eee in QCoreApplication::sendEvent(QObject*, QEvent*) (receiver=<optimized out>, event=event@entry=0x7fb644017a10) at kernel/qcoreapplication.cpp:1450
#14 0x00007fb696bfc8d7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x564c39b04b40) at kernel/qcoreapplication.cpp:1799
#15 0x00007fb696bfce78 in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1653
#16 0x00007fb696c57793 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x564c39b64830) at kernel/qeventdispatcher_glib.cpp:276
#17 0x00007fb690178417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fb690178650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fb6901786dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fb696c56daf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x564c39b730a0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#21 0x00007fb696bf803a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffba1aa770, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#22 0x00007fb696c01170 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1363
#23 0x0000564c3899ff3f in  ()
#24 0x00007fb696220b97 in __libc_start_main (main=0x564c3899f3d0, argc=1, argv=0x7fffba1aaa48, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffba1aaa38) at ../csu/libc-start.c:310
#25 0x0000564c389a03ca in _start ()

The reporter indicates this bug may be a duplicate of or related to bug 410570.

Possible duplicates by query: bug 410847, bug 410570, bug 410509.

Reported using DrKonqi