Application: kwin_x11 (5.10.5)

Qt Version: 5.9.1
Frameworks Version: 5.38.0
Operating System: Linux 4.13.4-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
I just login in the computer and I am greeted with Kwin had crashed.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f288cf5c840 (LWP 665))]

Thread 4 (Thread 0x7f286adee700 (LWP 779)):
#0  0x00007f2889ef62c5 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#1  0x00007f2889e9cfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2889cb63ee in QThread::exec() () at /usr/lib/libQt5Core.so.5
#3  0x00007f288458a3d9 in  () at /usr/lib/libQt5Qml.so.5
#4  0x00007f2889cbb13b in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f2885a8c08a in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f288c8e01bf in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f2871912700 (LWP 727)):
#0  0x00007f288c8d5db6 in ppoll () at /usr/lib/libc.so.6
#1  0x00007f2889ef4b83 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib/libQt5Core.so.5
#2  0x00007f2889ef631f in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#3  0x00007f2889e9cfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007f2889cb63ee in QThread::exec() () at /usr/lib/libQt5Core.so.5
#5  0x00007f288372c376 in  () at /usr/lib/libQt5DBus.so.5
#6  0x00007f2889cbb13b in  () at /usr/lib/libQt5Core.so.5
#7  0x00007f2885a8c08a in start_thread () at /usr/lib/libpthread.so.0
#8  0x00007f288c8e01bf in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f2873a86700 (LWP 726)):
#0  0x00007f288c8d5cbb in poll () at /usr/lib/libc.so.6
#1  0x00007f288b9b98e0 in  () at /usr/lib/libxcb.so.1
#2  0x00007f288b9bb679 in xcb_wait_for_event () at /usr/lib/libxcb.so.1
#3  0x00007f2874b6674a in  () at /usr/lib/libQt5XcbQpa.so.5
#4  0x00007f2889cbb13b in  () at /usr/lib/libQt5Core.so.5
#5  0x00007f2885a8c08a in start_thread () at /usr/lib/libpthread.so.0
#6  0x00007f288c8e01bf in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f288cf5c840 (LWP 665)):
[KCrash Handler]
#5  0x00007f2889d4fb12 in QtPrivate::QStringList_contains(QStringList const*, QString const&, Qt::CaseSensitivity) () at /usr/lib/libQt5Core.so.5
#6  0x00007f2883735461 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007f288373ed15 in  () at /usr/lib/libQt5DBus.so.5
#8  0x00007f288372d0a9 in QDBusConnection::asyncCall(QDBusMessage const&, int) const () at /usr/lib/libQt5DBus.so.5
#9  0x00007f288c481f8f in KWin::LogindIntegration::logindServiceRegistered() () at /usr/lib/libkwin.so.5
#10 0x00007f288c482466 in  () at /usr/lib/libkwin.so.5
#11 0x00007f2889ece88f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#12 0x00007f28837852b0 in QDBusPendingCallWatcher::finished(QDBusPendingCallWatcher*) () at /usr/lib/libQt5DBus.so.5
#13 0x00007f2889ecf1b2 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f288abbae2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007f288abc2906 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f2889e9ebb0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007f2889ea1406 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#18 0x00007f2889ef6136 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#19 0x00007f2874bcb0fe in  () at /usr/lib/libQt5XcbQpa.so.5
#20 0x00007f2889e9cfdb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#21 0x00007f2889ea6028 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#22 0x00007f288cba96d3 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#23 0x00007f288c80af6a in __libc_start_main () at /usr/lib/libc.so.6
#24 0x00005569557f77ca in _start ()

Reported using DrKonqi