Application: systemsettings5 (5.9.5)

Qt Version: 5.8.0
Frameworks Version: 5.33.0
Operating System: Linux 4.10.15-1-MANJARO x86_64
Distribution: "Manjaro Linux"

-- Information about the crash:
- What I was doing when the application crashed:
I just closed the system settings after turning desktop compositing on

- Unusual behavior I noticed:
Logging in fresh after installing the latest updates, Kwin crashed, disabling compositing. After enabling it back and closing the settings app, this crash happened.

-- Backtrace:
Application: Rendszerbeállítások (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fa78784b500 (LWP 1933))]

Thread 3 (Thread 0x7fa758bc8700 (LWP 1984)):
#0  0x00007fa77d6ac1c9 in g_mutex_lock () at /usr/lib/libglib-2.0.so.0
#1  0x00007fa77d66699b in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fa77d666acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fa783e9d09b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fa783e468ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fa783c68a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fa781f65025 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007fa783c6d6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fa77f5ae2e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fa78358054f in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7fa76c1f0700 (LWP 1936)):
#0  0x00007fa78357667d in poll () at /usr/lib/libc.so.6
#1  0x00007fa77d6669b6 in  () at /usr/lib/libglib-2.0.so.0
#2  0x00007fa77d666acc in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#3  0x00007fa783e9d09b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#4  0x00007fa783e468ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#5  0x00007fa783c68a73 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#6  0x00007fa7847b4125 in  () at /usr/lib/libQt5DBus.so.5
#7  0x00007fa783c6d6d8 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007fa77f5ae2e7 in start_thread () at /usr/lib/libpthread.so.0
#9  0x00007fa78358054f in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7fa78784b500 (LWP 1933)):
[KCrash Handler]
#6  0x0000000009841400 in  ()
#7  0x00007fa76f06eba6 in  () at /usr/lib/libKF5Notifications.so.5
#8  0x00007fa76f06ec39 in  () at /usr/lib/libKF5Notifications.so.5
#9  0x00007fa783e72441 in QObjectPrivate::deleteChildren() () at /usr/lib/libQt5Core.so.5
#10 0x00007fa783e7bd9f in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#11 0x00007fa76f040ea9 in  () at /usr/lib/libKF5Notifications.so.5
#12 0x00007fa7834ca6c0 in __run_exit_handlers () at /usr/lib/libc.so.6
#13 0x00007fa7834ca71a in  () at /usr/lib/libc.so.6
#14 0x00007fa7834b4518 in __libc_start_main () at /usr/lib/libc.so.6
#15 0x000000000040c33a in _start ()

Reported using DrKonqi