#0  0x00007fb9acc44d22 in raise () at /usr/lib/libc.so.6
#1  0x00007fb9acc2e90e in abort () at /usr/lib/libc.so.6
#2  0x00007fb9ad58dee4 in qt_assert(char const*, char const*, int) () at /usr/lib/libQt5Core.so.5
#3  0x00007fb9ad58df44 in qt_assert_x(char const*, char const*, char const*, int) () at /usr/lib/libQt5Core.so.5
#4  0x00007fb9aff00d8c in KWin::Platform::setPrimaryOutput(KWin::AbstractOutput*) (this=0x559f290ffeb0, primary=0x559f29211750) at /tmp/kwin/src/platform.cpp:605
#5  0x00007fb9a7ae40e7 in KWin::DrmBackend::readOutputsConfiguration(QVector<KWin::DrmAbstractOutput*> const&) (this=0x559f290ffeb0, outputs=...)
    at /tmp/kwin/src/backends/drm/drm_backend.cpp:479
#6  0x00007fb9a7ae42fd in KWin::DrmBackend::enableOutput(KWin::DrmAbstractOutput*, bool) (this=0x559f290ffeb0, output=0x559f2920e980, enable=false)
    at /tmp/kwin/src/backends/drm/drm_backend.cpp:501
#7  0x00007fb9a7ae285a in KWin::DrmBackend::removeOutput(KWin::DrmAbstractOutput*) (this=0x559f290ffeb0, o=0x559f2920e980) at /tmp/kwin/src/backends/drm/drm_backend.cpp:308
#8  0x00007fb9a7aee067 in QtPrivate::FunctorCall<QtPrivate::IndexesList<0>, QtPrivate::List<KWin::DrmAbstractOutput*>, void, void (KWin::DrmBackend::*)(KWin::DrmAbstractOutput*)>::call(void (KWin::DrmBackend::*)(KWin::DrmAbstractOutput*), KWin::DrmBackend*, void**) (f=
    (void (KWin::DrmBackend::*)(KWin::DrmBackend * const, KWin::DrmAbstractOutput *)) 0x7fb9a7ae2832 <KWin::DrmBackend::removeOutput(KWin::DrmAbstractOutput*)>, o=0x559f290ffeb0, arg=0x7fff162f3a30) at /usr/include/qt/QtCore/qobjectdefs_impl.h:152
#9  0x00007fb9a7aed3c5 in QtPrivate::FunctionPointer<void (KWin::DrmBackend::*)(KWin::DrmAbstractOutput*)>::call<QtPrivate::List<KWin::DrmAbstractOutput*>, void>(void (KWin::DrmBackend::*)(KWin::DrmAbstractOutput*), KWin::DrmBackend*, void**) (f=
    (void (KWin::DrmBackend::*)(KWin::DrmBackend * const, KWin::DrmAbstractOutput *)) 0x7fb9a7ae2832 <KWin::DrmBackend::removeOutput(KWin::DrmAbstractOutput*)>, o=0x559f290ffeb0, arg=0x7fff162f3a30) at /usr/include/qt/QtCore/qobjectdefs_impl.h:185
#10 0x00007fb9a7aec0f7 in QtPrivate::QSlotObject<void (KWin::DrmBackend::*)(KWin::DrmAbstractOutput*), QtPrivate::List<KWin::DrmAbstractOutput*>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*) (which=1, this_=0x559f2921aaf0, r=0x559f290ffeb0, a=0x7fff162f3a30, ret=0x0) at /usr/include/qt/QtCore/qobjectdefs_impl.h:418
#11 0x00007fb9ad7aa5d3 in  () at /usr/lib/libQt5Core.so.5
#12 0x00007fb9a7adfa52 in KWin::DrmGpu::outputRemoved(KWin::DrmAbstractOutput*) (this=0x559f29127030, _t1=0x559f2920e980)
    at /tmp/kwin/build/src/backends/drm/KWinWaylandDrmBackend_autogen/EWIEGA46WW/moc_drm_gpu.cpp:175
#13 0x00007fb9a7b0e38e in KWin::DrmGpu::removeOutput(KWin::DrmOutput*) (this=0x559f29127030, output=0x559f2920e980) at /tmp/kwin/src/backends/drm/drm_gpu.cpp:554
#14 0x00007fb9a7b0c94e in KWin::DrmGpu::updateOutputs() (this=0x559f29127030) at /tmp/kwin/src/backends/drm/drm_gpu.cpp:284
#15 0x00007fb9a7ae2998 in KWin::DrmBackend::updateOutputs() (this=0x559f290ffeb0) at /tmp/kwin/src/backends/drm/drm_backend.cpp:318
#16 0x00007fb9a7ae2256 in KWin::DrmBackend::handleUdevEvent() (this=0x559f290ffeb0) at /tmp/kwin/src/backends/drm/drm_backend.cpp:260
--Type <RET> for more, q to quit, c to continue without paging--
#17 0x00007fb9a7aede6e in QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, void (KWin::DrmBackend::*)()>::call(void (KWin::DrmBackend::*)(), KWin::DrmBackend*, void**) (f=(void (KWin::DrmBackend::*)(KWin::DrmBackend * const)) 0x7fb9a7ae1ba8 <KWin::DrmBackend::handleUdevEvent()>, o=0x559f290ffeb0, arg=0x7fff162f3f40)
    at /usr/include/qt/QtCore/qobjectdefs_impl.h:152
#18 0x00007fb9a7aed16a in QtPrivate::FunctionPointer<void (KWin::DrmBackend::*)()>::call<QtPrivate::List<>, void>(void (KWin::DrmBackend::*)(), KWin::DrmBackend*, void**)
    (f=(void (KWin::DrmBackend::*)(KWin::DrmBackend * const)) 0x7fb9a7ae1ba8 <KWin::DrmBackend::handleUdevEvent()>, o=0x559f290ffeb0, arg=0x7fff162f3f40)
    at /usr/include/qt/QtCore/qobjectdefs_impl.h:185
#19 0x00007fb9a7aebdbd in QtPrivate::QSlotObject<void (KWin::DrmBackend::*)(), QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase*, QObject*, void**, bool*)
    (which=1, this_=0x559f29128a40, r=0x559f290ffeb0, a=0x7fff162f3f40, ret=0x0) at /usr/include/qt/QtCore/qobjectdefs_impl.h:418
#20 0x00007fb9ad7aa5d3 in  () at /usr/lib/libQt5Core.so.5
#21 0x00007fb9ad7ac294 in QSocketNotifier::activated(QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#22 0x00007fb9ad7ac3df in QSocketNotifier::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#23 0x00007fb9ae3141a6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#24 0x00007fb9ad7799ba in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#25 0x00007fb9ad7c3924 in QEventDispatcherUNIXPrivate::activateSocketNotifiers() () at /usr/lib/libQt5Core.so.5
#26 0x00007fb9ad7c4895 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#27 0x0000559f274bbed2 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
#28 0x00007fb9ad771bab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#29 0x00007fb9ad77d3e7 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#30 0x0000559f273489f2 in main(int, char**) (argc=14, argv=0x7fff162f4658) at /tmp/kwin/src/main_wayland.cpp:727