Application: systemsettings5 (5.11.0)

Qt Version: 5.9.2
Frameworks Version: 5.38.0
Operating System: Linux 4.14.0-rc5-ARCH+ x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
Steps to reproduce:

1. Open systemsettings
2. Go to displays
3. Close systemsettings

The crash can be reproduced every time.

-- Backtrace:
Application: Ustawienia systemowe (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f444b892ec0 (LWP 6480))]

Thread 14 (Thread 0x7f43a6097700 (LWP 6510)):
#0  0x00007f44474c5868 in read () at /usr/lib/libc.so.6
#1  0x00007f443f3c9521 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f443f3a090b in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f443f3a1e76 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f443f3a2f42 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#5  0x00007f43d9222e28 in  () at /usr/lib/libgio-2.0.so.0
#6  0x00007f443f3961eb in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 13 (Thread 0x7f43e2553700 (LWP 6509)):
#0  0x00007f44474c9d4b in poll () at /usr/lib/libc.so.6
#1  0x00007f443f3a1ed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f443f3a1fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f443f3a2002 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f443f3961eb in  () at /usr/lib/libglib-2.0.so.0
#5  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 12 (Thread 0x7f43e3762700 (LWP 6505)):
#0  0x00007f443f3c95f9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007f443f3a1c92 in g_main_context_acquire () at /usr/lib/libglib-2.0.so.0
#2  0x00007f443f3a1d77 in  () at /usr/lib/libglib-2.0.so.0
#3  0x00007f443f3a1fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#4  0x00007f4447e08d64 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f43c4008a40, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007f4447dac4fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f43e3761db0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007f4447bc52ee in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007f4447bca03b in QThreadPrivate::start(void*) (arg=0x564852133b70) at thread/qthread_unix.cpp:368
#8  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 11 (Thread 0x7f43e2d54700 (LWP 6504)):
#0  0x00007f44474c5868 in read () at /usr/lib/libc.so.6
#1  0x00007f443f3c9521 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f443f3a090b in g_main_context_check () at /usr/lib/libglib-2.0.so.0
#3  0x00007f443f3a1e76 in  () at /usr/lib/libglib-2.0.so.0
#4  0x00007f443f3a1fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#5  0x00007f4447e08d64 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f43bc008520, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007f4447dac4fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f43e2d53db0, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#7  0x00007f4447bc52ee in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:515
#8  0x00007f4447bca03b in QThreadPrivate::start(void*) (arg=0x56485213f200) at thread/qthread_unix.cpp:368
#9  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 10 (Thread 0x7f44097a0700 (LWP 6493)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 9 (Thread 0x7f4424b39700 (LWP 6489)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 8 (Thread 0x7f442533a700 (LWP 6488)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 7 (Thread 0x7f4425b3b700 (LWP 6487)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 6 (Thread 0x7f442633c700 (LWP 6486)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 5 (Thread 0x7f4426b3d700 (LWP 6485)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 4 (Thread 0x7f4427543700 (LWP 6484)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f44286c3700 (LWP 6483)):
#0  0x00007f444328438d in pthread_cond_wait@@GLIBC_2.3.2 () at /usr/lib/libpthread.so.0
#1  0x00007f442d5ae81c in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#2  0x00007f442d5ae728 in  () at /usr/lib/xorg/modules/dri/radeonsi_dri.so
#3  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#4  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f4435ca5700 (LWP 6482)):
#0  0x00007f44474c9d4b in poll () at /usr/lib/libc.so.6
#1  0x00007f443f3a1ed3 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007f443f3a1fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007f4447e08d64 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f4430000b10, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007f4447dac4fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f4435ca4d80, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#5  0x00007f4447bc52ee in QThread::exec() (this=this@entry=0x7f4448498080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread.cpp:515
#6  0x00007f4448223a86 in QDBusConnectionManager::run() (this=0x7f4448498080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#7  0x00007f4447bca03b in QThreadPrivate::start(void*) (arg=0x7f4448498080 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:368
#8  0x00007f444327e08a in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007f44474d424f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f444b892ec0 (LWP 6480)):
[KCrash Handler]
#5  0x00007f443af37c81 in wl_proxy_create_wrapper () at /usr/lib/libwayland-client.so.0
#6  0x00007f442f7bf7ea in  () at /usr/lib/libEGL_mesa.so.0
#7  0x00007f442f7ac70f in  () at /usr/lib/libEGL_mesa.so.0
#8  0x00007f442fdf8722 in  () at /usr/lib/qt/plugins/wayland-graphics-integration-client/libwayland-egl.so
#9  0x00007f442fdf6bce in  () at /usr/lib/qt/plugins/wayland-graphics-integration-client/libwayland-egl.so
#10 0x00007f44491efca9 in QOpenGLContext::makeCurrent(QSurface*) (this=0x564851616e80, surface=0x564851079d60) at kernel/qopenglcontext.cpp:984
#11 0x00007f444999ce3a in deleteBackingStore(QWidgetPrivate*) (d=d@entry=0x564850fb5c00) at kernel/qwidget.cpp:1885
#12 0x00007f44499a5c22 in QWidgetPrivate::deleteTLSysExtra() (this=0x564850fb5c00) at kernel/qwidget.cpp:1912
#13 0x00007f44499aad11 in QWidget::destroy(bool, bool) (this=this@entry=0x564850f6b680, destroyWindow=destroyWindow@entry=true, destroySubWindows=destroySubWindows@entry=true) at kernel/qwidget.cpp:12409
#14 0x00007f44499b25f3 in QWidget::~QWidget() (this=0x564850f6b680, __in_chrg=<optimized out>) at kernel/qwidget.cpp:1712
#15 0x000056484ee12d1f in  ()
#16 0x000056484ee12e89 in  ()
#17 0x00007f4447dde6f1 in QObject::event(QEvent*) (this=this@entry=0x564850f6b680, e=e@entry=0x5648515ef750) at kernel/qobject.cpp:1237
#18 0x00007f44499b71dc in QWidget::event(QEvent*) (this=this@entry=0x564850f6b680, event=event@entry=0x5648515ef750) at kernel/qwidget.cpp:9264
#19 0x00007f4449acf304 in QMainWindow::event(QEvent*) (this=0x564850f6b680, event=0x5648515ef750) at widgets/qmainwindow.cpp:1562
#20 0x00007f444afc045b in KMainWindow::event(QEvent*) () at /usr/lib/libKF5XmlGui.so.5
#21 0x00007f444b012156 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/libKF5XmlGui.so.5
#22 0x00007f4449976fcc in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x564850ee65e0, receiver=receiver@entry=0x564850f6b680, e=e@entry=0x5648515ef750) at kernel/qapplication.cpp:3722
#23 0x00007f444997eaa6 in QApplication::notify(QObject*, QEvent*) (this=0x7ffd1de31540, receiver=0x564850f6b680, e=0x5648515ef750) at kernel/qapplication.cpp:3481
#24 0x00007f4447dae0d0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x564850f6b680, event=event@entry=0x5648515ef750) at kernel/qcoreapplication.cpp:1018
#25 0x00007f4447db0926 in QCoreApplication::sendEvent(QObject*, QEvent*) (event=0x5648515ef750, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:233
#26 0x00007f4447db0926 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x564850edd320) at kernel/qcoreapplication.cpp:1678
#27 0x00007f4447db0eba in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1532
#28 0x00007f4447e09754 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x564850f7a200) at kernel/qeventdispatcher_glib.cpp:276
#29 0x00007f443f3a0270 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#30 0x00007f443f3a1f69 in  () at /usr/lib/libglib-2.0.so.0
#31 0x00007f443f3a1fae in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#32 0x00007f4447e08d41 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x564850f704c0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#33 0x00007f4447dac4fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd1de31460, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#34 0x00007f4447db5548 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1291
#35 0x000056484ee0fc34 in  ()
#36 0x00007f44473fef6a in __libc_start_main () at /usr/lib/libc.so.6
#37 0x000056484ee0fcba in _start ()

Reported using DrKonqi