Application: plasmashell (5.5.4)

Qt Version: 5.5.1
Operating System: Linux 4.4.0-18-generic x86_64
Distribution: Ubuntu 16.04 LTS

-- Information about the crash:
- What I was doing when the application crashed:
Unplugged external projector and connect laptop to external monitors

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 0x7fb9666e88c0 (LWP 14901))]

Thread 8 (Thread 0x7fb9518fa700 (LWP 14904)):
#0  0x00007fb960df15ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb964eb6c62 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007fb964eb88d7 in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007fb953a48629 in QXcbEventReader::run (this=0x801790) at qxcbconnection.cpp:1253
#4  0x00007fb9614e784e in QThreadPrivate::start (arg=0x801790) at thread/qthread_unix.cpp:331
#5  0x00007fb9605d36fa in start_thread (arg=0x7fb9518fa700) at pthread_create.c:333
#6  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 7 (Thread 0x7fb94afc9700 (LWP 14906)):
#0  0x00007fb960df15ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb95db8631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb95db8642c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb96171ea9b in QEventDispatcherGlib::processEvents (this=0x7fb9440008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb9616c5dea in QEventLoop::exec (this=this@entry=0x7fb94afc8ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb9614e28a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb963d8a3c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb9614e784e in QThreadPrivate::start (arg=0x8d89a0) at thread/qthread_unix.cpp:331
#8  0x00007fb9605d36fa in start_thread (arg=0x7fb94afc9700) at pthread_create.c:333
#9  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 6 (Thread 0x7fb93fb93700 (LWP 14907)):
#0  0x00007fb95dbcaa64 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007fb95db8623e in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb95db8642c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb96171ea9b in QEventDispatcherGlib::processEvents (this=0x7fb9380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb9616c5dea in QEventLoop::exec (this=this@entry=0x7fb93fb92ce0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb9614e28a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb963d8a3c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb9614e784e in QThreadPrivate::start (arg=0xc944a0) at thread/qthread_unix.cpp:331
#8  0x00007fb9605d36fa in start_thread (arg=0x7fb93fb93700) at pthread_create.c:333
#9  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 5 (Thread 0x7fb93dceb700 (LWP 14908)):
#0  0x00007fb960df15ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb95db8631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb95db8642c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb96171ea9b in QEventDispatcherGlib::processEvents (this=0x7fb9300008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb9616c5dea in QEventLoop::exec (this=this@entry=0x7fb93dceace0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb9614e28a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb963d8a3c5 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007fb9614e784e in QThreadPrivate::start (arg=0xd46480) at thread/qthread_unix.cpp:331
#8  0x00007fb9605d36fa in start_thread (arg=0x7fb93dceb700) at pthread_create.c:333
#9  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 4 (Thread 0x7fb937fff700 (LWP 14909)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1  0x00007fb96612fbd4 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#2  0x00007fb96612fc19 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Script.so.5
#3  0x00007fb9605d36fa in start_thread (arg=0x7fb937fff700) at pthread_create.c:333
#4  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 3 (Thread 0x7fb935997700 (LWP 14910)):
#0  0x00007fb960df15ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb95db8631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb95db8642c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb96171ea9b in QEventDispatcherGlib::processEvents (this=0x7fb8ac0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb9616c5dea in QEventLoop::exec (this=this@entry=0x7fb935996c90, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb9614e28a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb964710ed6 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007fb9614e784e in QThreadPrivate::start (arg=0x100ec00) at thread/qthread_unix.cpp:331
#8  0x00007fb9605d36fa in start_thread (arg=0x7fb935997700) at pthread_create.c:333
#9  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 2 (Thread 0x7fb8abfff700 (LWP 14923)):
#0  0x00007fb960df15ad in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fb95db8631c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007fb95db8642c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007fb96171ea9b in QEventDispatcherGlib::processEvents (this=0x7fb8a4010b40, flags=...) at kernel/qeventdispatcher_glib.cpp:420
#4  0x00007fb9616c5dea in QEventLoop::exec (this=this@entry=0x7fb8abffecc0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#5  0x00007fb9614e28a4 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:503
#6  0x00007fb89c49c7d7 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7  0x00007fb9614e784e in QThreadPrivate::start (arg=0x3915a30) at thread/qthread_unix.cpp:331
#8  0x00007fb9605d36fa in start_thread (arg=0x7fb8abfff700) at pthread_create.c:333
#9  0x00007fb960dfd2dd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109

Thread 1 (Thread 0x7fb9666e88c0 (LWP 14901)):
[KCrash Handler]
#6  0x00007fb964c2e420 in Plasma::Applet::actions() const () from /usr/lib/x86_64-linux-gnu/libKF5Plasma.so.5
#7  0x00000000004559b2 in ShellCorona::addOutput(QSharedPointer<KScreen::Output> const&) ()
#8  0x0000000000455b4f in ShellCorona::outputEnabledChanged() ()
#9  0x00007fb9616f6e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffeae9710b0, r=0x8c0220, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#10 QMetaObject::activate (sender=0xd1da30, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=<optimized out>) at kernel/qobject.cpp:3698
#11 0x00007fb9658afc59 in KScreen::Output::apply(QSharedPointer<KScreen::Output> const&) () from /usr/lib/x86_64-linux-gnu/libKF5Screen.so.6
#12 0x00007fb96589f5d5 in KScreen::Config::apply(QSharedPointer<KScreen::Config> const&) () from /usr/lib/x86_64-linux-gnu/libKF5Screen.so.6
#13 0x00007fb9658a4cc9 in KScreen::ConfigMonitor::Private::updateConfigs(QSharedPointer<KScreen::Config> const&) () from /usr/lib/x86_64-linux-gnu/libKF5Screen.so.6
#14 0x00007fb9658a68ad in KScreen::ConfigMonitor::Private::edidReady(QDBusPendingCallWatcher*) () from /usr/lib/x86_64-linux-gnu/libKF5Screen.so.6
#15 0x00007fb9616f6e4f in QtPrivate::QSlotObjectBase::call (a=0x7ffeae9714a0, r=0xf56a70, this=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qobject_impl.h:124
#16 QMetaObject::activate (sender=0x5f61310, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeae9714a0) at kernel/qobject.cpp:3698
#17 0x00007fb9616f77d7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7fb9668896a0 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffeae9714a0) at kernel/qobject.cpp:3578
#18 0x00007fb96686ef6f in QDBusPendingCallWatcher::finished (this=<optimized out>, _t1=0x5f61310) at .moc/moc_qdbuspendingcall.cpp:148
#19 0x00007fb966870645 in QDBusPendingCallWatcherPrivate::_q_finished (this=<optimized out>) at qdbuspendingcall.cpp:488
#20 QDBusPendingCallWatcher::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at .moc/moc_qdbuspendingcall.cpp:80
#21 0x00007fb9616f7ea1 in QObject::event (this=0x5f61310, e=<optimized out>) at kernel/qobject.cpp:1239
#22 0x00007fb9621cb05c in QApplicationPrivate::notify_helper (this=this@entry=0x7e97d0, receiver=receiver@entry=0x5f61310, e=e@entry=0x5e0ebe0) at kernel/qapplication.cpp:3716
#23 0x00007fb9621d0516 in QApplication::notify (this=0x7ffeae971b90, receiver=0x5f61310, e=0x5e0ebe0) at kernel/qapplication.cpp:3499
#24 0x00007fb9616c862b in QCoreApplication::notifyInternal (this=0x7ffeae971b90, receiver=0x5f61310, event=event@entry=0x5e0ebe0) at kernel/qcoreapplication.cpp:965
#25 0x00007fb9616caa26 in QCoreApplication::sendEvent (event=0x5e0ebe0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#26 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x7df600) at kernel/qcoreapplication.cpp:1593
#27 0x00007fb9616caf08 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1451
#28 0x00007fb96171e673 in postEventSourceDispatch (s=0x826dd0) at kernel/qeventdispatcher_glib.cpp:271
#29 0x00007fb95db86127 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007fb95db86380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007fb95db8642c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fb96171ea7f in QEventDispatcherGlib::processEvents (this=0x828cf0, flags=...) at kernel/qeventdispatcher_glib.cpp:418
#33 0x00007fb9616c5dea in QEventLoop::exec (this=this@entry=0x7ffeae971a30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:204
#34 0x00007fb9616cde8c in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1229
#35 0x0000000000432d4a in main ()

Possible duplicates by query: bug 362259, bug 362184, bug 361730, bug 361506, bug 361247.

Reported using DrKonqi