https://bugs.freedesktop.org/show_bug.cgi?id=107213
--- Comment #15 from Shmerl shtetldik@gmail.com --- I managed to make it produce a core. It's from kwin_wayland. After installing needed debug symbol packages, here is a backtrace:
Core was generated by `/usr/bin/kwin_wayland --xwayland --libinput --exit-with-session=/usr/lib/x86_64'. Program terminated with signal SIGSEGV, Segmentation fault. #0 0x00007eff59760f30 in wl_closure_init (message=message@entry=0x7, size=size@entry=52, num_arrays=num_arrays@entry=0x7eff5140858c, args=args@entry=0x0) at ../src/connection.c:562 562 ../src/connection.c: No such file or directory. [Current thread is 1 (Thread 0x7eff51409700 (LWP 7249))] (gdb) bt #0 0x00007eff59760f30 in wl_closure_init (message=message@entry=0x7, size=size@entry=52, num_arrays=num_arrays@entry=0x7eff5140858c, args=args@entry=0x0) at ../src/connection.c:562 #1 0x00007eff59761aa0 in wl_connection_demarshal (connection=0x7eff440053e0, size=size@entry=52, objects=objects@entry=0x7eff440052e8, message=0x7) at ../src/connection.c:698 #2 0x00007eff5975fae8 in queue_event (len=52, display=0x7eff44005270) at ../src/wayland-client.c:1364 #3 read_events (display=0x7eff44005270) at ../src/wayland-client.c:1466 #4 wl_display_read_events (display=display@entry=0x7eff44005270) at ../src/wayland-client.c:1549 #5 0x00007eff59760169 in wl_display_dispatch_queue (display=0x7eff44005270, queue=0x7eff44005338) at ../src/wayland-client.c:1788 #6 0x00007eff5d123933 in KWayland::Client::ConnectionThread::Private::<lambda()>::operator() (__closure=0x7eff44009550) at ./src/client/connection_thread.cpp:129 #7 QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, KWayland::Client::ConnectionThread::Private::setupSocketNotifier()::<lambda()>
::call (arg=<optimized out>,
f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:128 #8 QtPrivate::Functor<KWayland::Client::ConnectionThread::Private::setupSocketNotifier()::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:238 #9 QtPrivate::QFunctorSlotObject<KWayland::Client::ConnectionThread::Private::setupSocketNotifier()::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x7eff44009540, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:421 #10 0x00007eff5e606910 in QtPrivate::QSlotObjectBase::call (a=0x7eff514087d0, r=0x564a80be84f0, this=0x7eff44009540) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:376 #11 QMetaObject::activate(QObject*, int, int, void**) () at kernel/qobject.cpp:3754 #12 0x00007eff5e606dd7 in QMetaObject::activate (sender=sender@entry=0x7eff44009440, m=m@entry=0x7eff5e863c60 QSocketNotifier::staticMetaObject, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7eff514087d0) at kernel/qobject.cpp:3633 #13 0x00007eff5e611ff9 in QSocketNotifier::activated (this=this@entry=0x7eff44009440, _t1=<optimized out>, _t2=...) at .moc/moc_qsocketnotifier.cpp:136 #14 0x00007eff5e612341 in QSocketNotifier::event (this=0x7eff44009440, e=0x7eff51408a30) at kernel/qsocketnotifier.cpp:266 #15 0x00007eff5e9cb4a1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5 #16 0x00007eff5e9d2ae0 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5 #17 0x00007eff5e5dd579 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at ../../include/QtCore/5.11.1/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:307 #18 0x00007eff5e62fe4a in QCoreApplication::sendEvent (event=0x7eff51408a30, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234 #19 socketNotifierSourceDispatch(_GSource*, int (*)(void*), void*) () at kernel/qeventdispatcher_glib.cpp:106 #20 0x00007eff5a647287 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #21 0x00007eff5a6474c0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #22 0x00007eff5a64754c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #23 0x00007eff5e62f223 in QEventDispatcherGlib::processEvents (this=0x7eff44000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #24 0x00007eff5e5dc24b in QEventLoop::exec(QFlagsQEventLoop::ProcessEventsFlag) () at ../../include/QtCore/../../src/corelib/global/qflags.h:140 #25 0x00007eff5e42b176 in QThread::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:120 #26 0x00007eff5e434d47 in QThreadPrivate::start(void*) () at thread/qthread_unix.cpp:367 #27 0x00007eff5efb5f2a in start_thread (arg=0x7eff51409700) at pthread_create.c:463 #28 0x00007eff5e0fdedf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95