kactivitymanagerd

Application: kactivitymanagerd (kactivitymanagerd), signal: Segmentation fault
Using host libthread_db library "/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f82be9e1800 (LWP 712))]

Thread 2 (Thread 0x7f82b01f5700 (LWP 721)):
#0  0x00007f82bca2ec2d in poll () from /lib/libc.so.6
#1  0x00007f82bc3fa8c2 in ?? () from /usr/lib/libxcb.so.1
#2  0x00007f82bc3fc617 in xcb_wait_for_event () from /usr/lib/libxcb.so.1
#3  0x00007f82b2d87479 in ?? () from /usr/lib/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5
#4  0x00007f82bd11b049 in ?? () from /usr/lib/libQt5Core.so.5
#5  0x00007f82bbaab424 in start_thread () from /lib/libpthread.so.0
#6  0x00007f82bca37cad in clone () from /lib/libc.so.6

Thread 1 (Thread 0x7f82be9e1800 (LWP 712)):
[KCrash Handler]
#5  0x00007f82bd112a95 in QMutex::lock() () from /usr/lib/libQt5Core.so.5
#6  0x00007f82bea9795f in ?? () from /usr/lib/libQt5DBus.so.5
#7  0x00007f82bea9885a in QDBusConnection::sessionBus() () from /usr/lib/libQt5DBus.so.5
#8  0x00007f82a3b01823 in ?? () from /usr/lib/qt5/plugins/styles/qtcurve.so
#9  0x00007f82a3b3eee6 in ?? () from /usr/lib/qt5/plugins/styles/qtcurve.so
#10 0x00007f82bd2d90c9 in ?? () from /usr/lib/libQt5Core.so.5
#11 0x00007f82bd2cf4b2 in ?? () from /usr/lib/libQt5Core.so.5
#12 0x00007f82bd2cf5d9 in ?? () from /usr/lib/libQt5Core.so.5
#13 0x00007f82bd313e4c in QObject::~QObject() () from /usr/lib/libQt5Core.so.5
#14 0x00007f82bd2ceaf9 in QFactoryLoader::~QFactoryLoader() () from /usr/lib/libQt5Core.so.5
#15 0x00007f82bdbf58d9 in ?? () from /usr/lib/libQt5Widgets.so.5
#16 0x00007f82bc985c38 in __run_exit_handlers () from /lib/libc.so.6
#17 0x00007f82bc985c85 in exit () from /lib/libc.so.6
#18 0x00007f82be71729f in KDBusService::KDBusService(QFlags<KDBusService::StartupOption>, QObject*) () from /usr/lib/libKF5DBusAddons.so.5
#19 0x0000000000408e15 in ?? ()
#20 0x00007f82bc970710 in __libc_start_main () from /lib/libc.so.6
#21 0x00000000004090a9 in _start ()