[user@machine ~]$ WAYLAND_DEBUG=1
[user@machine ~]$ gdb konversation
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Reading symbols from konversation...Reading symbols from /usr/lib/debug/usr/bin/konversation.debug...done.
done.
(gdb) run
Starting program: /usr/bin/konversation 
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
QObject::connect: invalid null parameter
[New Thread 0x7fffdd61d700 (LWP 12578)]
[New Thread 0x7fffd7fff700 (LWP 12579)]
[New Thread 0x7fffc9c54700 (LWP 12580)]
[New Thread 0x7fffc9312700 (LWP 12581)]
[New Thread 0x7fffc8b11700 (LWP 12582)]
[New Thread 0x7fffc8310700 (LWP 12583)]
[New Thread 0x7fffc7b0f700 (LWP 12584)]
[New Thread 0x7fffc730e700 (LWP 12585)]
[New Thread 0x7fffc6b0d700 (LWP 12586)]
[New Thread 0x7fffc6240700 (LWP 12587)]
[New Thread 0x7fffc57ed700 (LWP 12588)]
[New Thread 0x7fffc4fec700 (LWP 12589)]
[New Thread 0x7fffb7fff700 (LWP 12590)]
[New Thread 0x7fffb77fe700 (LWP 12591)]


The Wayland connection broke. Did the Wayland compositor die?
[Thread 0x7fffc6240700 (LWP 12587) exited]
[Thread 0x7fffc57ed700 (LWP 12588) exited]
[Thread 0x7fffc4fec700 (LWP 12589) exited]
[Thread 0x7fffb7fff700 (LWP 12590) exited]
[Thread 0x7fffb77fe700 (LWP 12591) exited]
[Thread 0x7fffc6b0d700 (LWP 12586) exited]
[Thread 0x7fffc730e700 (LWP 12585) exited]
[Thread 0x7fffc8310700 (LWP 12583) exited]
[Thread 0x7fffc8b11700 (LWP 12582) exited]
[Thread 0x7fffc7b0f700 (LWP 12584) exited]
[Thread 0x7fffc9312700 (LWP 12581) exited]
[Thread 0x7fffc9c54700 (LWP 12580) exited]
[Thread 0x7fffdd61d700 (LWP 12578) exited]

Thread 1 "konversation" received signal SIGSEGV, Segmentation fault.
QVector<KWayland::Client::ConnectionThread*>::reallocData (this=this@entry=0x7fffde8016b0 <KWayland::Client::ConnectionThread::Private::connections>, asize=21845, 
    aalloc=<optimized out>, options=..., options@entry=...) at /usr/include/qt5/QtCore/qvector.h:556
556                     x->size = asize;
(gdb) thread apply all backtrace

Thread 3 (Thread 0x7fffd7fff700 (LWP 12579)):
#0  0x00007ffff0f4ad2d in poll () at ../sysdeps/unix/syscall-template.S:84
#1  0x00007fffea4e0579 in g_main_context_poll (priority=<optimized out>, n_fds=1, fds=0x7fffd0003070, timeout=<optimized out>, context=0x7fffd0000990) at gmain.c:4271
#2  g_main_context_iterate (context=context@entry=0x7fffd0000990, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3967
#3  0x00007fffea4e068c in g_main_context_iteration (context=0x7fffd0000990, may_block=may_block@entry=1) at gmain.c:4033
#4  0x00007ffff1d7247f in QEventDispatcherGlib::processEvents (this=0x7fffd00008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#5  0x00007ffff1d2022a in QEventLoop::exec (this=this@entry=0x7fffd7ffec70, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212
#6  0x00007ffff1b7199a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:515
#7  0x00007ffff1b75c72 in QThreadPrivate::start (arg=0x555555fa3b80) at thread/qthread_unix.cpp:368
#8  0x00007fffefb4836d in start_thread (arg=0x7fffd7fff700) at pthread_create.c:456
#9  0x00007ffff0f56e1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 1 (Thread 0x7fffe641b940 (LWP 12574)):
#0  QVector<KWayland::Client::ConnectionThread*>::reallocData (this=this@entry=0x7fffde8016b0 <KWayland::Client::ConnectionThread::Private::connections>, asize=21845, 
    aalloc=<optimized out>, options=..., options@entry=...) at /usr/include/qt5/QtCore/qvector.h:556
#1  0x00007fffde59d825 in QVector<KWayland::Client::ConnectionThread*>::detach (this=0x7fffde8016b0 <KWayland::Client::ConnectionThread::Private::connections>)
    at /usr/include/qt5/QtCore/qvector.h:383
#2  QVector<KWayland::Client::ConnectionThread*>::erase (this=this@entry=0x7fffde8016b0 <KWayland::Client::ConnectionThread::Private::connections>, abegin=0x55555a3772c8, 
    aend=0x55555a3772d0) at /usr/include/qt5/QtCore/qvector.h:756
#3  0x00007fffde59d498 in QVector<KWayland::Client::ConnectionThread*>::remove (i=<optimized out>, this=0x7fffde8016b0 <KWayland::Client::ConnectionThread::Private::connections>)
    at /usr/include/qt5/QtCore/qvector.h:447
#4  QVector<KWayland::Client::ConnectionThread*>::removeOne (t=@0x555555fa9f68: 0x555555f6dfb0, this=0x7fffde8016b0 <KWayland::Client::ConnectionThread::Private::connections>)
    at /usr/include/qt5/QtCore/qvector.h:179
#5  KWayland::Client::ConnectionThread::Private::~Private (this=0x555555fa9f20, __in_chrg=<optimized out>) at /usr/src/debug/kwayland-5.38.0/src/client/connection_thread.cpp:88
#6  0x00007fffde59d4d5 in QScopedPointerDeleter<KWayland::Client::ConnectionThread::Private>::cleanup (pointer=0x555555fa9f20) at /usr/include/qt5/QtCore/qscopedpointer.h:60
#7  QScopedPointer<KWayland::Client::ConnectionThread::Private, QScopedPointerDeleter<KWayland::Client::ConnectionThread::Private> >::~QScopedPointer (this=0x555555f6dfc0, 
    __in_chrg=<optimized out>) at /usr/include/qt5/QtCore/qscopedpointer.h:107
---Type <return> to continue, or q <return> to quit---
#8  KWayland::Client::ConnectionThread::~ConnectionThread (this=0x555555f6dfb0, __in_chrg=<optimized out>) at /usr/src/debug/kwayland-5.38.0/src/client/connection_thread.cpp:200
#9  0x00007fffde59d4f9 in KWayland::Client::ConnectionThread::~ConnectionThread (this=0x555555f6dfb0, __in_chrg=<optimized out>)
    at /usr/src/debug/kwayland-5.38.0/src/client/connection_thread.cpp:203
#10 0x00007ffff1d50518 in QObjectPrivate::deleteChildren (this=this@entry=0x555555f9fc20) at kernel/qobject.cpp:1992
#11 0x00007ffff1d513f2 in QObject::~QObject (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1022
#12 0x00007fffdc2097e9 in Poller::~Poller (this=0x555555fafaf0, __in_chrg=<optimized out>) at /usr/src/debug/kwayland-integration-5.10.5/src/idletime/poller.h:41
#13 0x00007ffff1d18e27 in QLibraryPrivate::unload (this=this@entry=0x555555f6e250, flag=flag@entry=QLibraryPrivate::NoUnloadSys) at plugin/qlibrary.cpp:562
#14 0x00007ffff1d199e7 in QLibraryStore::cleanup () at plugin/qlibrary.cpp:403
#15 qlibraryCleanup () at plugin/qlibrary.cpp:427
#16 (anonymous namespace)::qlibraryCleanup_dtor_class_::~qlibraryCleanup_dtor_class_ (this=<optimized out>, __in_chrg=<optimized out>) at plugin/qlibrary.cpp:429
#17 0x00007ffff0e81335 in __cxa_finalize (d=0x7ffff1f68f20) at cxa_finalize.c:56
#18 0x00007ffff1b50723 in __do_global_dtors_aux () from /lib64/libQt5Core.so.5
#19 0x00007fffffffd190 in ?? ()
#20 0x00007ffff7de74b3 in _dl_fini () at dl-fini.c:235
Backtrace stopped: frame did not save the PC
(gdb) 
(gdb)