Application: systemsettings5 (5.4.3)

Qt Version: 5.5.1
Operating System: Linux 4.1.13-5-default x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

-- Information about the crash:
I was checking different decorations and desktop effects options in KDE System Settings. When I finished and I tried to close the System Settings window the error popup occured. It happens from time to time without clear reason.

The crash can be reproduced sometimes.

-- Backtrace:
Application: Ustawienia systemowe (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7ff09ed53780 (LWP 15331))]

Thread 3 (Thread 0x7ff08c7d8700 (LWP 15332)):
#0  0x00007ff09aaaec1d in poll () at /lib64/libc.so.6
#1  0x00007ff097889422 in  () at /usr/lib64/libxcb.so.1
#2  0x00007ff09788b00f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007ff08eb2d3c9 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007ff09b1a632f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007ff0970130a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007ff09aab704d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7ff079113700 (LWP 15363)):
#0  0x00007ff09aaaec1d in poll () at /lib64/libc.so.6
#1  0x00007ff096af6e64 in  () at /usr/lib64/libglib-2.0.so.0
#2  0x00007ff096af6f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#3  0x00007ff09b3d8d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007ff09b37fd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007ff09b1a161a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007ff09b1a632f in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007ff0970130a4 in start_thread () at /lib64/libpthread.so.0
#8  0x00007ff09aab704d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7ff09ed53780 (LWP 15331)):
[KCrash Handler]
#6  0x0000000000000020 in  ()
#7  0x00007ff09b3b434b in QObject::disconnect(QObject const*, char const*, QObject const*, char const*) () at /usr/lib64/libQt5Core.so.5
#8  0x00007ff07cbaf485 in KParts::PartManager::~PartManager() () at /usr/lib64/libKF5Parts.so.5
#9  0x00007ff07cbaf629 in KParts::PartManager::~PartManager() () at /usr/lib64/libKF5Parts.so.5
#10 0x00007ff09b3b063c in QObjectPrivate::deleteChildren() () at /usr/lib64/libQt5Core.so.5
#11 0x00007ff09b3ba2cc in QObject::~QObject() () at /usr/lib64/libQt5Core.so.5
#12 0x00007ff07d2ef4a6 in KHTMLPart::~KHTMLPart() () at /usr/lib64/libKF5KHtml.so.5
#13 0x00007ff07d2ef659 in KHTMLPart::~KHTMLPart() () at /usr/lib64/libKF5KHtml.so.5
#14 0x00007ff09b3b2b18 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#15 0x00007ff09cea4e7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#16 0x00007ff09cea9cc8 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#17 0x00007ff09b381e95 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#18 0x00007ff09b384057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#19 0x00007ff09b3d98f3 in  () at /usr/lib64/libQt5Core.so.5
#20 0x00007ff096af6c84 in g_main_context_dispatch () at /usr/lib64/libglib-2.0.so.0
#21 0x00007ff096af6ed8 in  () at /usr/lib64/libglib-2.0.so.0
#22 0x00007ff096af6f7c in g_main_context_iteration () at /usr/lib64/libglib-2.0.so.0
#23 0x00007ff09b3d8d6c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#24 0x00007ff09b37fd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#25 0x00007ff09b3878f6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#26 0x00000000004103cf in main ()

Possible duplicates by query: bug 356487, bug 355711.

Reported using DrKonqi