#0  0x00007f65af6cd28c in pselect () from /usr/lib/libc.so.6
#1  0x00007f65adf3c4fc in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () from /usr/lib/libQt5Core.so.5
#2  0x00007f65adf3e1a8 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () from /usr/lib/libQt5Core.so.5
#3  0x00007f65adf3e6f9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#4  0x00007f65995874ad in ?? () from /usr/lib/qt/plugins/platforms/libqxcb.so
#5  0x00007f65adee7532 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQt5Core.so.5
#6  0x00007f65adeeef0c in QCoreApplication::exec() () from /usr/lib/libQt5Core.so.5
#7  0x00007f65af9939fb in kdemain (argc=1, argv=0x7fff106467b8) at /home/yo/builds/kwin/src/kwin-5.2.0.1/main_x11.cpp:294
#8  0x00007f65af60c800 in __libc_start_main () from /usr/lib/libc.so.6
#9  0x00000000004007d9 in _start ()
A debugging session is active.

	Inferior 1 [process 777] will be detached.

Quit anyway? (y or n) Detaching from program: /usr/bin/kwin_x11, process 777