https://bugs.kde.org/show_bug.cgi?id=461276
--- Comment #1 from Ralf Jung <p...@ralfj.de> ---
I managed to get this backtrace out of 'coredumpctl debug', I hope it is
helpful:
#0 KWin::Output::capabilities() const (this=0x0) at ./src/core/output.cpp:159
#1 0x00007f3ad15f86d6 in KWaylandServer::DpmsInterface::sendSupported()
(this=0x7f3a940079f0) at ./src/wayland/dpms_interface.cpp:138
#2 0x00007f3ad15f883d in
KWaylandServer::DpmsInterface::DpmsInterface(KWaylandServer::OutputInterface*,
wl_resource*) (this=0x7f3a940079f0, output=0x556d89f7dc70,
resource=0x556d8a40c3c0) at ./src/wayland/dpms_interface.cpp:83
#3 0x00007f3acc631f7a in () at /lib/x86_64-linux-gnu/libffi.so.8
#4 0x00007f3acc63140e in () at /lib/x86_64-linux-gnu/libffi.so.8
#5 0x00007f3acc631b0d in ffi_call () at /lib/x86_64-linux-gnu/libffi.so.8
#6 0x00007f3ace32d981 in () at /lib/x86_64-linux-gnu/libwayland-server.so.0
#7 0x00007f3ace328bda in () at /lib/x86_64-linux-gnu/libwayland-server.so.0
#8 0x00007f3ace32b89a in wl_event_loop_dispatch () at
/lib/x86_64-linux-gnu/libwayland-server.so.0
#9 0x00007f3ad15f6545 in KWaylandServer::Display::dispatchEvents()
(this=<optimized out>) at ./src/wayland/display.cpp:114
#10 0x00007f3acfae8caf in QtPrivate::QSlotObjectBase::call(QObject*, void**)
(a=0x7ffd30e711f0, r=0x556d88d19e40, this=0x556d89049390) at
../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#11 doActivate<false>(QObject*, int, void**) (sender=0x556d8925e920,
signal_index=3, argv=0x7ffd30e711f0) at kernel/qobject.cpp:3919
#12 0x00007f3acfae1f4f in QMetaObject::activate(QObject*, QMetaObject const*,
int, void**)
(sender=sender@entry=0x556d8925e920, m=m@entry=0x7f3acfd4c1a0
<QSocketNotifier::staticMetaObject>,
local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd30e711f0)
at kernel/qobject.cpp:3979
#13 0x00007f3acfaebfef in QSocketNotifier::activated(QSocketDescriptor,
QSocketNotifier::Type, QSocketNotifier::QPrivateSignal)
(this=this@entry=0x556d8925e920, _t1=..., _t2=<optimized out>, _t3=...) at
.moc/moc_qsocketnotifier.cpp:178
#14 0x00007f3acfaec7f5 in QSocketNotifier::event(QEvent*) (this=0x556d8925e920,
e=<optimized out>) at kernel/qsocketnotifier.cpp:302
#15 0x00007f3acf162f5e in QApplicationPrivate::notify_helper(QObject*, QEvent*)
(this=<optimized out>, receiver=0x556d8925e920, e=0x7ffd30e712f0) at
kernel/qapplication.cpp:3637
#16 0x00007f3acfab1718 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
(receiver=0x556d8925e920, event=0x7ffd30e712f0) at
kernel/qcoreapplication.cpp:1064
#17 0x00007f3acfb068f3 in
QEventDispatcherUNIXPrivate::activateSocketNotifiers() (this=0x556d88cee610) at
kernel/qeventdispatcher_unix.cpp:304
#18 0x00007f3acfb06db7 in
QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
(this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:511
#19 0x0000556d877d90cd in ()
#20 0x00007f3acfab019b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
(this=this@entry=0x7ffd30e71480, flags=..., flags@entry=...) at
../../include/QtCore/../../src/corelib/global/qflags.h:69
#21 0x00007f3acfab8306 in QCoreApplication::exec() () at
../../include/QtCore/../../src/corelib/global/qflags.h:121
#22 0x0000556d876ea154 in ()
#23 0x00007f3ace82920a in __libc_start_call_main
(main=main@entry=0x556d876e8870, argc=argc@entry=14,
argv=argv@entry=0x7ffd30e71958) at ../sysdeps/nptl/libc_start_call_main.h:58
#24 0x00007f3ace8292bc in __libc_start_main_impl (main=0x556d876e8870, argc=14,
argv=0x7ffd30e71958, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffd30e71948) at ../csu/libc-start.c:389
#25 0x0000556d876ebb31 in ()
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