#0  0x0000000000000018 in  ()
#1  0x00007f13e88bfd9e in QMetaObject::cast(QObject const*) const () at /usr/lib/libQt5Core.so.5
#2  0x00007f13e246dd6b in qobject_cast<KWin::DrmOutput*>(QObject*) (object=<optimized out>) at /usr/include/qt/QtCore/qobject.h:519
#3  KWin::DrmBackend::applyOutputChanges(KWin::WaylandOutputConfig const&) (this=0x55db7c1be980, config=...) at /usr/src/debug/kwin-5.23.90/src/backends/drm/drm_backend.cpp:639
#4  0x00007f13ea9dcef3 in KWin::Platform::requestOutputsChange(KWaylandServer::OutputConfigurationV2Interface*) (this=0x55db7c1be980, config=0x55db7d541db0)
    at /usr/src/debug/kwin-5.23.90/src/platform.cpp:133
#5  0x00007f13e88ea5d3 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f13ea5ce2e4 in KWaylandServer::OutputManagementV2Interface::configurationChangeRequested(KWaylandServer::OutputConfigurationV2Interface*) () at /usr/lib/libKWaylandServer.so.5
#7  0x00007f13e65ffd4a in  () at /usr/lib/libffi.so.8
#8  0x00007f13e65ff267 in  () at /usr/lib/libffi.so.8
#9  0x00007f13e780f323 in  () at /usr/lib/libwayland-server.so.0
#10 0x00007f13e780a5cc in  () at /usr/lib/libwayland-server.so.0
#11 0x00007f13e780d1ca in wl_event_loop_dispatch () at /usr/lib/libwayland-server.so.0
#12 0x00007f13ea5e6b7b in KWaylandServer::Display::dispatchEvents() () at /usr/lib/libKWaylandServer.so.5
#13 0x00007f13e88ea5d3 in  () at /usr/lib/libQt5Core.so.5
#14 0x00007f13e88ec294 in QSocketNotifier::activated(QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#15 0x00007f13e88ec3df in QSocketNotifier::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#16 0x00007f13e93731a6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#17 0x00007f13e88b99ba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#18 0x00007f13e8903924 in QEventDispatcherUNIXPrivate::activateSocketNotifiers() () at /usr/lib/libQt5Core.so.5
#19 0x00007f13e8904895 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#20 0x000055db7ba71a62 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
#21 0x00007f13e88b1bab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#22 0x00007f13e88bd3e7 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#23 0x000055db7b9674b9 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kwin-5.23.90/src/main_wayland.cpp:727