Application: systemsettings5 (5.12.4)

Qt Version: 5.10.1
Frameworks Version: 5.44.0
Operating System: Linux 4.16.0-0.rc7.git0.1.fc28.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
- What I was doing when the application crashed:

I changed the background image of the login manager (sddm) using systemsettings5. After clicking on apply I entered my password and then it crashed.

The crash can be reproduced sometimes.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcdfbe78940 (LWP 17628))]

Thread 8 (Thread 0x7fcdbd303700 (LWP 17961)):
#0  0x00007fcdfec4b9b0 in g_source_iter_next () at /lib64/libglib-2.0.so.0
#1  0x00007fcdfec4df93 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#2  0x00007fcdfec4ea4b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#3  0x00007fcdfec4ec40 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#4  0x00007fce07060c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcdb8012710, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#5  0x00007fce0700f12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcdbd302c40, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#6  0x00007fce06e5d9c6 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:522
#7  0x00007fce0535d339 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#8  0x00007fce06e6211d in QThreadPrivate::start(void*) (arg=0x55f1b16c9ba0) at thread/qthread_unix.cpp:376
#9  0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#10 0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7fcdcc9a1700 (LWP 17956)):
#0  0x00007fce06194929 in poll () at /lib64/libc.so.6
#1  0x00007fcdfec4eb16 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fcdfec4eed2 in g_main_loop_run () at /lib64/libglib-2.0.so.0
#3  0x00007fcdbfb2b66a in gdbus_shared_thread_func () at /lib64/libgio-2.0.so.0
#4  0x00007fcdfec76cda in g_thread_proxy () at /lib64/libglib-2.0.so.0
#5  0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7fcdcdbe4700 (LWP 17955)):
#0  0x00007fce06190374 in read () at /lib64/libc.so.6
#1  0x00007fcdfec93df0 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007fcdfec4e60b in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007fcdfec4eac0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007fcdfec4ec40 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007fcdfec4ec91 in glib_worker_main () at /lib64/libglib-2.0.so.0
#6  0x00007fcdfec76cda in g_thread_proxy () at /lib64/libglib-2.0.so.0
#7  0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#8  0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7fcdcfde1700 (LWP 17634)):
#0  0x00007fce06194929 in poll () at /lib64/libc.so.6
#1  0x00007fcdfec4eb16 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fcdfec4ec40 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fce07060c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcdc8000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fce0700f12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcdcfde0c40, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007fce06e5d9c6 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007fce0535d339 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007fce06e6211d in QThreadPrivate::start(void*) (arg=0x55f1ae7e3df0) at thread/qthread_unix.cpp:376
#8  0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fcdd66f6700 (LWP 17633)):
#0  0x00007fce06194929 in poll () at /lib64/libc.so.6
#1  0x00007fcdfec4eb16 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007fcdfec4ec40 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007fce07060c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcdd0000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#4  0x00007fce0700f12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcdd66f5c40, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#5  0x00007fce06e5d9c6 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:522
#6  0x00007fce0535d339 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#7  0x00007fce06e6211d in QThreadPrivate::start(void*) (arg=0x55f1ae521bb0) at thread/qthread_unix.cpp:376
#8  0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fcde41f9700 (LWP 17631)):
#0  0x00007fce06190374 in read () at /lib64/libc.so.6
#1  0x00007fcdfec93df0 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007fcdfec4e60b in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007fcdfec4eac0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007fcdfec4ec40 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007fce07060c2b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcddc000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#6  0x00007fce0700f12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fcde41f8c30, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#7  0x00007fce06e5d9c6 in QThread::exec() (this=<optimized out>) at thread/qthread.cpp:522
#8  0x00007fce082e6299 in QDBusConnectionManager::run() (this=0x7fce0835d060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at qdbusconnection.cpp:178
#9  0x00007fce06e6211d in QThreadPrivate::start(void*) (arg=0x7fce0835d060 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:376
#10 0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#11 0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fcdecb95700 (LWP 17630)):
#0  0x00007fce06194929 in poll () at /lib64/libc.so.6
#1  0x00007fce027dc04f in poll (__timeout=-1, __nfds=1, __fds=0x7fcdecb94b78) at /usr/include/bits/poll2.h:46
#2  0x00007fce027dc04f in _xcb_conn_wait (c=0x55f1adfc74b0, cond=<optimized out>, vector=0x0, count=0x0) at xcb_conn.c:479
#3  0x00007fce027ddcaa in xcb_wait_for_event (c=0x55f1adfc74b0) at xcb_in.c:697
#4  0x00007fcdef5434d9 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#5  0x00007fce06e6211d in QThreadPrivate::start(void*) (arg=0x55f1adfd1c50) at thread/qthread_unix.cpp:376
#6  0x00007fce03972564 in start_thread () at /lib64/libpthread.so.0
#7  0x00007fce0619f31f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fcdfbe78940 (LWP 17628)):
[KCrash Handler]
#6  0x00007fce05689888 in QQuickItem::isVisible() const () at /lib64/libQt5Quick.so.5
#7  0x00007fce05689969 in QQuickKeysAttached::keyReleased(QKeyEvent*, bool) () at /lib64/libQt5Quick.so.5
#8  0x00007fce05689635 in QQuickItemPrivate::filterKeyEvent(QKeyEvent*, bool) () at /lib64/libQt5Quick.so.5
#9  0x00007fce05694829 in QQuickItemPrivate::deliverKeyEvent(QKeyEvent*) () at /lib64/libQt5Quick.so.5
#10 0x00007fce05694b65 in QQuickItem::event(QEvent*) () at /lib64/libQt5Quick.so.5
#11 0x00007fce07b72e95 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#12 0x00007fce07b7a83a in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#13 0x00007fce07010376 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f1ae669db0, event=0x7fff7e222090) at kernel/qcoreapplication.cpp:1050
#14 0x00007fce056a2628 in QQuickWindowPrivate::deliverKeyEvent(QKeyEvent*) () at /lib64/libQt5Quick.so.5
#15 0x00007fce056a76d3 in QQuickWindow::keyReleaseEvent(QKeyEvent*) () at /lib64/libQt5Quick.so.5
#16 0x00007fce07633ba5 in QWindow::event(QEvent*) () at /lib64/libQt5Gui.so.5
#17 0x00007fce056b18df in QQuickWindow::event(QEvent*) () at /lib64/libQt5Quick.so.5
#18 0x00007fce07b72e95 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#19 0x00007fce07b7a83a in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#20 0x00007fce07010376 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f1ae4c6c00, event=0x7fff7e222090) at kernel/qcoreapplication.cpp:1050
#21 0x00007fce05b498f0 in QQuickWidget::keyReleaseEvent(QKeyEvent*) () at /lib64/libQt5QuickWidgets.so.5
#22 0x00007fce07bb2bb8 in QWidget::event(QEvent*) () at /lib64/libQt5Widgets.so.5
#23 0x00007fce05b4b175 in QQuickWidget::event(QEvent*) () at /lib64/libQt5QuickWidgets.so.5
#24 0x00007fce07b72e95 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#25 0x00007fce07b7ac49 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#26 0x00007fce07010376 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f1ae523e90, event=0x7fff7e222090) at kernel/qcoreapplication.cpp:1050
#27 0x00007fce07bd0729 in QWidgetWindow::event(QEvent*) () at /lib64/libQt5Widgets.so.5
#28 0x00007fce07b72e95 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#29 0x00007fce07b7a83a in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#30 0x00007fce07010376 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55f1ae1b15e0, event=0x7fff7e222090) at kernel/qcoreapplication.cpp:1050
#31 0x00007fce076243c0 in QGuiApplicationPrivate::processKeyEvent(QWindowSystemInterfacePrivate::KeyEvent*) () at /lib64/libQt5Gui.so.5
#32 0x00007fce076298a5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /lib64/libQt5Gui.so.5
#33 0x00007fce0760355b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Gui.so.5
#34 0x00007fcdef5d106f in QPAEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5XcbQpa.so.5
#35 0x00007fce0700f12b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7fff7e222260, flags=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:71
#36 0x00007fce070175b6 in QCoreApplication::exec() () at kernel/qcoreapplication.cpp:1338
#37 0x000055f1ad14c009 in main ()

Reported using DrKonqi