Application: systemsettings5 (5.12.4)

Qt Version: 5.9.1
Frameworks Version: 5.44.0
Operating System: Linux 4.13.0-36-generic x86_64
Distribution: Ubuntu 17.10

-- Information about the crash:
- What I was doing when the application crashed:
1.Open system settings
2.Close system settings
3.Crash reporter popups.

The crash can be reproduced every time.

-- Backtrace:
Application: 系统设置 (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ffb4b863140 (LWP 11820))]

Thread 4 (Thread 0x7ffb0cd26700 (LWP 11830)):
#0  0x00007ffb472e9951 in __GI___poll (fds=0x564d8f00d540, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffb41218169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb41218502 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb0dc94b26 in  () at /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007ffb4123f645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffb435017fc in start_thread (arg=0x7ffb0cd26700) at pthread_create.c:465
#6  0x00007ffb472f5b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7ffb0d527700 (LWP 11829)):
#0  0x00007ffb4125d5b9 in g_mutex_lock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007ffb41216ff0 in g_main_context_acquire () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb41218025 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb4121827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007ffb412182c1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007ffb4123f645 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007ffb435017fc in start_thread (arg=0x7ffb0d527700) at pthread_create.c:465
#7  0x00007ffb472f5b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7ffb3896e700 (LWP 11822)):
#0  0x00007ffb472e9951 in __GI___poll (fds=0x7ffb3400e480, nfds=1, timeout=13462) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffb41218169 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffb4121827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffb47c2949b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007ffb47bcee3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007ffb479ee3ca in QThread::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffb4952de45 in  () at /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007ffb479f329d in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007ffb435017fc in start_thread (arg=0x7ffb3896e700) at pthread_create.c:465
#9  0x00007ffb472f5b5f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7ffb4b863140 (LWP 11820)):
[KCrash Handler]
#6  0x00007ffb395b2b30 in wl_proxy_create_wrapper () at /usr/lib/x86_64-linux-gnu/libwayland-client.so.0
#7  0x00007ffb2aee19f1 in  () at /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
#8  0x00007ffb2aeced17 in  () at /usr/lib/x86_64-linux-gnu/mesa-egl/libEGL.so.1
#9  0x00007ffb2b107f4d in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/wayland-graphics-integration-client/libwayland-egl.so
#10 0x00007ffb2b1064c5 in  () at /usr/lib/x86_64-linux-gnu/qt5/plugins/wayland-graphics-integration-client/libwayland-egl.so
#11 0x00007ffb4845d286 in QOpenGLContext::makeCurrent(QSurface*) () at /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007ffb48c04c57 in  () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#13 0x00007ffb48c0d722 in QWidgetPrivate::deleteTLSysExtra() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007ffb48c125b8 in QWidget::destroy(bool, bool) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007ffb48c19b48 in QWidget::~QWidget() () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#16 0x00007ffb4adc373d in KMainWindow::~KMainWindow() () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#17 0x0000564d886bfbbb in  ()
#18 0x0000564d886bfc19 in  ()
#19 0x00007ffb47c00470 in QObject::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007ffb48c1e4d3 in QWidget::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#21 0x00007ffb48d0bbab in QMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#22 0x00007ffb4adc5b87 in KMainWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#23 0x00007ffb4ae0a9e5 in KXmlGuiWindow::event(QEvent*) () at /usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#24 0x00007ffb48bdd46c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#25 0x00007ffb48be4d34 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#26 0x00007ffb47bd0de8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007ffb47bd355d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007ffb47c29e53 in  () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007ffb41217fb7 in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007ffb412181f0 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007ffb4121827c in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007ffb47c2947f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#33 0x00007ffb47bcee3a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#34 0x00007ffb47bd7da4 in QCoreApplication::exec() () at /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x0000564d886bce44 in  ()
#36 0x00007ffb472021c1 in __libc_start_main (main=0x564d886bca40, argc=1, argv=0x7fff970397a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff97039798) at ../csu/libc-start.c:308
#37 0x0000564d886bceca in _start ()

Reported using DrKonqi