Отладочная информация при падении:

Application: Dolphin (dolphin), signal: Segmentation fault
Content of s_kcrashErrorMessage: std::unique_ptr<char []> = {get() = 0x0}
[KCrash Handler]
#6  0x00007f2d6009b8ff in std::__atomic_base<int>::load (__m=std::memory_order_relaxed, this=0x0) at /usr/include/c++/10/bits/atomic_base.h:426
#7  QAtomicOps<int>::loadRelaxed<int> (_q_value=...) at /usr/include/qt5/QtCore/qatomic_cxx11.h:239
#8  QBasicAtomicInteger<int>::loadRelaxed (this=0x0) at /usr/include/qt5/QtCore/qbasicatomic.h:107
#9  QtPrivate::RefCount::deref (this=0x0) at /usr/include/qt5/QtCore/qrefcount.h:66
#10 QString::~QString (this=0x563f313a4878, __in_chrg=<optimized out>) at /usr/include/qt5/QtCore/qstring.h:1307
#11 QList<QString>::node_destruct (n=0x563f313a4878, this=0x7ffcc926c860) at /usr/include/qt5/QtCore/qlist.h:482
#12 QList<QString>::erase (it=..., this=0x7ffcc926c860) at /usr/include/qt5/QtCore/qlist.h:566
#13 QList<QString>::removeLast (this=0x7ffcc926c860) at /usr/include/qt5/QtCore/qlist.h:368
#14 PermissionsHelper::reload (this=0x563f312e4310) at /usr/src/debug/kdenetwork-filesharing-21.08.3/samba/filepropertiesplugin/permissionshelper.cpp:172
#15 0x00007f2d6009130a in operator() (__closure=0x563f312907b0) at /usr/src/debug/kdenetwork-filesharing-21.08.3/samba/filepropertiesplugin/sambausershareplugin.cpp:231
#16 QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, SambaUserSharePlugin::SambaUserSharePlugin(QObject*, const QList<QVariant>&)::<lambda()>::<lambda()> >::call (arg=<optimized out>, f=...) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:146
#17 QtPrivate::Functor<SambaUserSharePlugin::SambaUserSharePlugin(QObject*, const QList<QVariant>&)::<lambda()>::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:256
#18 QtPrivate::QFunctorSlotObject<SambaUserSharePlugin::SambaUserSharePlugin(QObject*, const QList<QVariant>&)::<lambda()>::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=0x563f312907a0, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/qt5/QtCore/qobjectdefs_impl.h:443
#19 0x00007f2d7fce3147 in QtPrivate::QSlotObjectBase::call (a=0x7ffcc926c980, r=0x563f312da9f0, this=0x563f312907a0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#20 doActivate<false> (sender=0x563f312e25d0, signal_index=3, argv=0x7ffcc926c980) at kernel/qobject.cpp:3886
#21 0x00007f2d7fcd8f5c in QObject::event (this=0x563f312e25d0, e=0x563f31236c10) at kernel/qobject.cpp:1314
#22 0x00007f2d808c1b1f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x563f312e25d0, e=0x563f31236c10) at kernel/qapplication.cpp:3632
#23 0x00007f2d7fcac66a in QCoreApplication::notifyInternal2 (receiver=0x563f312e25d0, event=0x563f31236c10) at kernel/qcoreapplication.cpp:1064
#24 0x00007f2d7fcaf5e1 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x563f30917ab0) at kernel/qcoreapplication.cpp:1821
#25 0x00007f2d7fd04a73 in postEventSourceDispatch (s=0x563f309a4960) at kernel/qeventdispatcher_glib.cpp:277
#26 0x00007f2d7d8626bb in g_main_dispatch (context=0x7f2d74005000) at ../glib/gmain.c:3337
#27 g_main_context_dispatch (context=0x7f2d74005000) at ../glib/gmain.c:4055
#28 0x00007f2d7d862968 in g_main_context_iterate (context=context@entry=0x7f2d74005000, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4131
#29 0x00007f2d7d862a1f in g_main_context_iteration (context=0x7f2d74005000, may_block=may_block@entry=1) at ../glib/gmain.c:4196
#30 0x00007f2d7fd040f0 in QEventDispatcherGlib::processEvents (this=0x563f309a4900, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#31 0x00007f2d7fcab09b in QEventLoop::exec (this=this@entry=0x7ffcc926cd70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#32 0x00007f2d7fcb32e0 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#33 0x0000563f30720079 in ?? ()
#34 0x00007f2d7f5c3e2d in __libc_start_main (main=0x563f3071ef60, argc=2, argv=0x7ffcc926d008, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcc926cff8) at ../csu/libc-start.c:311
#35 0x0000563f3072043a in ?? ()
[Inferior 1 (process 3724) detached]

*** Bug 41692 has been marked as a duplicate of this bug. ***

*** Bug 41658 has been marked as a duplicate of this bug. ***

*** Bug 41702 has been marked as a duplicate of this bug. ***

Created attachment 10132 [details]
log

Еще лог от пользователя (см. аттач).
Дополнительно: Удаление из системы kde5-network-filesharing проблему убирает.

Обновление до версии 21.12.1-alt1 решило проблему