#0  0x00007ffff60a605f in poll () at /usr/lib/libc.so.6
#1  0x00007ffff636163b in  () at /usr/lib/libxcb.so.1
#2  0x00007ffff6361d81 in  () at /usr/lib/libxcb.so.1
#3  0x00007ffff6362409 in xcb_send_request_with_fds64 () at /usr/lib/libxcb.so.1
#4  0x00007ffff63626ba in xcb_send_request () at /usr/lib/libxcb.so.1
#5  0x00007ffff636f10c in xcb_put_image () at /usr/lib/libxcb.so.1
#6  0x00007fffef3c1f56 in operator()(QRect const&) const (__closure=0x7fffffffd5e0, geo=@0x7fffffffd5a0: {
  x1 = 0,
  y1 = 0,
  x2 = 1535,
  y2 = 36
}) at /home/bernie/kde/src/kwin/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp:97
#7  0x00007fffef3c21ec in KWin::Decoration::X11Renderer::render() (this=0x55555654c4d0) at /home/bernie/kde/src/kwin/plugins/platforms/x11/standalone/x11_decoration_renderer.cpp:100
#8  0x00007fffef3c28c2 in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (KWin::Decoration::X11Renderer::*)()>::call(void (KWin::Decoration::X11Renderer::*)(), KWin::Decoration::X11Renderer*, void**) (f=&virtual table offset 104, o=0x55555654c4d0, arg=0x7fffffffd7c0) at /home/bernie/kde/qt5/include/QtCore/qobjectdefs_impl.h:152
#9  0x00007fffef3c2800 in QtPrivate::FunctionPointer<void (KWin::Decoration::X11Renderer::*)()>::call<QtPrivate::List<>, void>(void (KWin::Decoration::X11Renderer::*)(), KWin::Decoration::X11Renderer*, void**)
    (f=&virtual table offset 104, o=0x55555654c4d0, arg=0x7fffffffd7c0) at /home/bernie/kde/qt5/include/QtCore/qobjectdefs_impl.h:185
#10 0x00007fffef3c267d in QtPrivate::QSlotObject<void (KWin::Decoration::X11Renderer::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)
    (which=1, this_=0x555556381710, r=0x55555654c4d0, a=0x7fffffffd7c0, ret=0x0) at /home/bernie/kde/qt5/include/QtCore/qobjectdefs_impl.h:418
#11 0x00007ffff66ad15b in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7fffffffd7c0, r=0x55555654c4d0, this=0x555556381710)
    at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/kernel/qobjectdefs_impl.h:398
#12 doActivate<false>(QObject*, int, void**) (sender=0x555556332570, signal_index=3, argv=0x7fffffffd7c0) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3886
#13 0x00007ffff66a4559 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=sender@entry=0x555556332570, m=m@entry=0x7ffff695fbc0 <QTimer::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffffffd7c0)
    at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:3946
#14 0x00007ffff66b318c in QTimer::timeout(QTimer::QPrivateSignal) (this=this@entry=0x555556332570, _t1={<No data fields>}) at .moc/moc_qtimer.cpp:205
#15 0x00007ffff66b33a3 in QTimer::timerEvent(QTimerEvent*) (this=0x555556332570, e=<optimized out>) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qtimer.cpp:257
#16 0x00007ffff66a4fc1 in QObject::event(QEvent*) (this=0x555556332570, e=0x7fffffffdb30) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qobject.cpp:1291
#17 0x00007ffff710cb88 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=this@entry=0x555555595f30, receiver=receiver@entry=0x555556332570, e=e@entry=0x7fffffffdb30)
    at /home/bernie/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3673
#18 0x00007ffff7115564 in QApplication::notify(QObject*, QEvent*) (this=0x7fffffffddd0, receiver=0x555556332570, e=0x7fffffffdb30) at /home/bernie/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:3013
#19 0x00007ffff666ab30 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x555556332570, event=0x7fffffffdb30) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1063
#20 0x00007ffff666ad44 in QCoreApplication::sendEvent(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qcoreapplication.cpp:1458
#21 0x00007ffff66d44a7 in QTimerInfoList::activateTimers() (this=this@entry=0x555555598fa8) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:643
#22 0x00007ffff66d061c in QEventDispatcherUNIXPrivate::activateTimers() (this=this@entry=0x555555598f20) at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:249
#23 0x00007ffff66d1db7 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=<optimized out>, flags=<optimized out>)
    at /home/bernie/kde/src/Qt5/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:516
#24 0x00007fffefd8c54a in QXcbUnixEventDispatcher::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55555559a0d0, flags={
  i = 36
}) at /home/bernie/kde/src/Qt5/qtbase/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:60
#25 0x00007ffff66685e3 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffffffdce0, flags=<optimized out>, flags@entry={
  i = 36
}) at /usr/include/c++/10.1.0/bits/atomic_base.h:741
#26 0x00007ffff6668c27 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7fffffffdce0, flags=flags@entry={
  i = 0
}) at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:125
#27 0x00007ffff667322c in QCoreApplication::exec() () at ../../include/QtCore/../../../../../src/Qt5/qtbase/src/corelib/global/qflags.h:121
#28 0x00007ffff6a769c2 in QGuiApplication::exec() () at /home/bernie/kde/src/Qt5/qtbase/src/gui/kernel/qguiapplication.cpp:1867
#29 0x00007ffff710cafd in QApplication::exec() () at /home/bernie/kde/src/Qt5/qtbase/src/widgets/kernel/qapplication.cpp:2813
#30 0x000055555555b412 in  ()
#31 0x00007ffff5fd8002 in __libc_start_main () at /usr/lib/libc.so.6
#32 0x000055555555b94e in _start ()