#0  __GI___pthread_sigmask (how=1, newmask=<optimized out>, oldmask=0x0) at ./nptl/pthread_sigmask.c:43
#1  0x00007fb46044271d in __GI___sigprocmask (how=<optimized out>, set=<optimized out>, oset=<optimized out>) at ../sysdeps/unix/sysv/linux/sigprocmask.c:25
#2  0x00007fb4633e324f in KCrash::setCrashHandler(void (*)(int)) () at /lib/x86_64-linux-gnu/libKF6Crash.so.6
#3  0x00007fb4633e4708 in KCrash::defaultCrashHandler(int) () at /lib/x86_64-linux-gnu/libKF6Crash.so.6
#4  0x00007fb460442520 in <signal handler called> () at /lib/x86_64-linux-gnu/libc.so.6
#5  0x00007fb4626a2ee7 in QQmlData::addNotify(int, QQmlNotifierEndpoint*) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#6  0x00007fb4626ef9f7 in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#7  0x00007fb46278aaec in QQmlConnections::connectSignalsToMethods() () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#8  0x00007fb4626f3982 in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#9  0x00007fb46268b525 in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#10 0x00007fb46268b83f in QQmlComponentPrivate::completeCreate() () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#11 0x00007fb463a90b7d in PlasmaQuick::SharedQmlEngine::completeInitialization(QHash<QString, QVariant> const&) () at /lib/x86_64-linux-gnu/libKF6PlasmaQuick.so.6
#12 0x00007fb463a785a8 in PlasmaQuick::AppletQuickItem::itemForApplet(Plasma::Applet*) () at /lib/x86_64-linux-gnu/libKF6PlasmaQuick.so.6
#13 0x00007fb463aacfe0 in  () at /lib/x86_64-linux-gnu/libKF6PlasmaQuick.so.6
#14 0x00007fb463aad4be in  () at /lib/x86_64-linux-gnu/libKF6PlasmaQuick.so.6
#15 0x00007fb4626ff1ad in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#16 0x00007fb4625eb309 in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#17 0x00007fb4625f3233 in QV4::QObjectMethod::callInternal(QV4::Value const*, QV4::Value const*, int) const () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#18 0x00007fb462633a83 in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#19 0x00007fb462639cc5 in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#20 0x00007fb4625a794a in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#21 0x00007fb4625ab78b in QV4::Function::call(QObject*, void**, QMetaType const*, int, QV4::ExecutionContext*) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#22 0x00007fb4626d57fe in QQmlJavaScriptExpression::evaluate(void**, QMetaType const*, int) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#23 0x00007fb46267cba8 in QQmlBoundSignalExpression::evaluate(void**) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#24 0x00007fb462681a8b in  () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#25 0x00007fb4626ef085 in QQmlNotifier::emitNotify(QQmlNotifierEndpoint*, void**) () at /lib/x86_64-linux-gnu/libQt6Qml.so.6
#26 0x00007fb460d8e348 in doActivate<false>(QObject*, int, void**) (sender=0x55be19ca0fe0, signal_index=27, argv=0x7ffcdbc29740) at ./src/corelib/kernel/qobject.cpp:3884
#27 0x00007fb463769706 in Plasma::Containment::appletRemoved(Plasma::Applet*) () at /lib/x86_64-linux-gnu/libKF6Plasma.so.6
#28 0x00007fb463771178 in  () at /lib/x86_64-linux-gnu/libKF6Plasma.so.6
#29 0x00007fb460d8e85f in doActivate<false>(QObject*, int, void**) (sender=0x55be1c4f6e90, signal_index=17, argv=0x7ffcdbc29900) at ./src/corelib/kernel/qobject.cpp:4004
#30 0x00007fb46375da06 in Plasma::Applet::appletDeleted(Plasma::Applet*) () at /lib/x86_64-linux-gnu/libKF6Plasma.so.6
#31 0x00007fb4637528f8 in Plasma::Applet::~Applet() () at /lib/x86_64-linux-gnu/libKF6Plasma.so.6
#32 0x00007fb3dae3bd9d in IconApplet::~IconApplet() (this=0x55be1c4f6e90, __in_chrg=<optimized out>) at ./applets/icon/iconapplet.cpp:54
#33 0x00007fb460d833f1 in QObject::event(QEvent*) (this=0x55be1c4f6e90, e=0x55be207e5690) at ./src/corelib/kernel/qobject.cpp:1378
#34 0x00007fb461d875f6 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55be1c4f6e90, e=0x55be207e5690) at ./src/widgets/kernel/qapplication.cpp:3287
#35 0x00007fb460d37378 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55be1c4f6e90, event=0x55be207e5690) at ./src/corelib/kernel/qcoreapplication.cpp:1115
#36 0x00007fb460d3aec7 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x55be1981b010) at ./src/corelib/kernel/qcoreapplication.cpp:1895
#37 0x00007fb460f97fa7 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x55be19823580) at ./src/corelib/kernel/qeventdispatcher_glib.cpp:243
#38 0x00007fb45fa44d3b in g_main_dispatch (context=0x7fb454005040) at ../../../glib/gmain.c:3419
#39 g_main_context_dispatch (context=0x7fb454005040) at ../../../glib/gmain.c:4137
#40 0x00007fb45fa9a258 in g_main_context_iterate.constprop.0 (context=context@entry=0x7fb454005040, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../../../glib/gmain.c:4213
#41 0x00007fb45fa423e3 in g_main_context_iteration (context=0x7fb454005040, may_block=1) at ../../../glib/gmain.c:4278
#42 0x00007fb460f9780e in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55be19820e50, flags=...) at ./src/corelib/kernel/qeventdispatcher_glib.cpp:393
#43 0x00007fb460d43dcb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffcdbc29d10, flags=..., flags@entry=...) at ./src/corelib/global/qflags.h:34
#44 0x00007fb460d3fc56 in QCoreApplication::exec() () at ./src/corelib/global/qflags.h:74
#45 0x00007fb4613a8420 in QGuiApplication::exec() () at ./src/gui/kernel/qguiapplication.cpp:1894
#46 0x00007fb461d87569 in QApplication::exec() () at ./src/widgets/kernel/qapplication.cpp:2566
#47 0x000055be19619d91 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at ./shell/main.cpp:242

I can make this crash happen when I reproduce 472161 and then drag a folder over a notification. Symbolicated backtrace:

#0  futex_wait (private=0, expected=2, futex_word=0x7f75cbbf6c80 <main_arena>) at ../sysdeps/nptl/futex-internal.h:146
#1  __GI___lll_lock_wait_private (futex=futex@entry=0x7f75cbbf6c80 <main_arena>) at lowlevellock.c:34
#2  0x00007f75cbabea40 in __malloc_fork_lock_parent () at /usr/src/debug/glibc-2.37-4.fc38.x86_64/malloc/arena.c:189
#3  0x00007f75cbafd1c9 in __libc_fork () at fork.c:71
#4  0x00007f75cf2b6b32 in startDirectly(char const**) (argv=argv@entry=0x7ffd9d83cf38) at /home/nate/kde/src/kcrash/src/kcrash.cpp:743
#5  0x00007f75cf2b6ea9 in KCrash::startProcess(int, char const**, bool) (argc=argc@entry=17, argv=argv@entry=0x7ffd9d83cf38, waitAndExit=waitAndExit@entry=true)
    at /home/nate/kde/src/kcrash/src/kcrash.cpp:685
#6  0x00007f75cf2b788e in KCrash::defaultCrashHandler(int) (sig=6) at /home/nate/kde/src/kcrash/src/kcrash.cpp:606
#7  0x00007f75cba5fb70 in <signal handler called> () at /lib64/libc.so.6
#8  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#9  0x00007f75cbab08b3 in __pthread_kill_internal (signo=6, threadid=<optimized out>) at pthread_kill.c:78
#10 0x00007f75cba5fabe in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26
#11 0x00007f75cba4887f in __GI_abort () at abort.c:79
#12 0x00007f75cba4960f in __libc_message (fmt=fmt@entry=0x7f75cbbc352f "%s\n") at ../sysdeps/posix/libc_fatal.c:150
#13 0x00007f75cbaba775 in malloc_printerr (str=str@entry=0x7f75cbbc6708 "malloc(): smallbin double linked list corrupted") at malloc.c:5651
#14 0x00007f75cbabde2c in _int_malloc (av=av@entry=0x7f75cbbf6c80 <main_arena>, bytes=bytes@entry=257) at malloc.c:3896
#15 0x00007f75cbabe675 in _int_realloc (av=av@entry=0x7f75cbbf6c80 <main_arena>, oldp=oldp@entry=0x491d0f0, oldsize=oldsize@entry=80, nb=272) at malloc.c:4865
#16 0x00007f75cbabf4f8 in __GI___libc_realloc (oldmem=0x491d100, bytes=258) at malloc.c:3479
#17 0x00007f75cc2c29d6 in QArrayData::reallocateUnaligned(QArrayData*, void*, long long, long long, QArrayData::AllocationOption)
    (data=0x491d100, dataPointer=0x491d110, objectSize=objectSize@entry=2, capacity=120, capacity@entry=80, option=option@entry=QArrayData::Grow)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/tools/qarraydata.cpp:224
#18 0x00007f75cc29baff in QTypedArrayData<char16_t>::reallocateUnaligned(QTypedArrayData<char16_t>*, char16_t*, long long, QArrayData::AllocationOption)
    (option=QArrayData::Grow, capacity=<optimized out>, dataPointer=<optimized out>, data=<optimized out>) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/tools/qarraydata.h:117
#19 QtPrivate::QPodArrayOps<char16_t>::reallocate(long long, QArrayData::AllocationOption) (option=QArrayData::Grow, alloc=<optimized out>, this=0x54cc4d0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/tools/qarraydataops.h:259
#20 QArrayDataPointer<char16_t>::reallocateAndGrow(QArrayData::GrowthPosition, long long, QArrayDataPointer<char16_t>*) (this=0x54cc4d0, where=QArrayData::GrowsAtEnd, n=<optimized out>, old=0x0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/tools/qarraydatapointer.h:208
#21 0x00007f75cc293114 in QtPrivate::QCommonArrayOps<char16_t>::growAppend(char16_t const*, char16_t const*) (e=0x5a35240 u"", b=<optimized out>, this=0x54cc4d0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/tools/qarraydataops.h:922
#22 QString::append(QChar const*, long long) (len=<optimized out>, str=0x5a351d0, this=0x54cc4d0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/text/qstring.cpp:3090
#23 QString::append(QChar const*, long long) (this=0x54cc4d0, str=0x5a351d0, len=<optimized out>) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/text/qstring.cpp:3084
#24 0x00007f75cc11a657 in putEscapedString<char16_t> (isUnicode=true, length=<optimized out>, begin=<optimized out>, d=0x7f74f0770010)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/io/qdebug.cpp:226
#25 QDebug::putString(QChar const*, unsigned long) (this=<optimized out>, begin=<optimized out>, length=<optimized out>) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/io/qdebug.cpp:323
#26 0x00007f75cf14bf49 in QDebug::operator<<(QString const&) (this=0x7ffd9d83e1c0, t=...) at /usr/include/qt6/QtCore/qdebug.h:116
#27 0x00007f75cf14945c in KServicePrivate::init(KDesktopFile const*, KService*) (this=this@entry=0x58b4750, config=config@entry=0x7ffd9d83e240, q=q@entry=0x7ffd9d83e2d0)
    at /home/nate/kde/src/kservice/src/services/kservice.cpp:86
#28 0x00007f75cf155ae5 in KService::KService(QString const&) (this=this@entry=0x7ffd9d83e2d0, _fullpath=...) at /home/nate/kde/src/kservice/src/services/kservice.cpp:346
#29 0x00007f7568a532c8 in IconApplet::extraActions() (this=0x5951e40) at /home/nate/kde/src/plasma-workspace/applets/icon/iconapplet.cpp:330
#30 0x00007f7568a4e096 in IconApplet::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>)
    at /home/nate/kde/build6/plasma-workspace/applets/icon/org.kde.plasma.icon_autogen/EWIEGA46WW/moc_iconapplet.cpp:324
#31 0x00007f75ce25d017 in QQmlPropertyData::readProperty(QObject*, void*) const (property=<optimized out>, target=0x5951e40, this=0x6ed9be0)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/redhat-linux-build/include/QtQml/6.5.1/QtQml/private/../../../../../../src/qml/qml/qqmlpropertydata_p.h:312
#32 QV4::loadProperty(QV4::ExecutionEngine*, QV4::Heap::Object*, QObject*, QQmlPropertyData const&) (v4=0x186f6a0, wrapper=0x7f7510ebb3e0, object=0x5951e40, property=...)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4qobjectwrapper.cpp:216
#33 0x00007f75ce25e177 in QV4::QObjectWrapper::getQmlProperty(QV4::ExecutionEngine*, QQmlRefPointer<QQmlContextData> const&, QV4::Heap::Object*, QObject*, QV4::String*, QFlags<QV4::QObjectWrapper::Flag>, bool*, QQmlPropertyData const**) (engine=engine@entry=0x186f6a0, qmlContext=..., wrapper=<optimized out>, object=0x5951e40, name=0x7f7590bb9590, flags=flags@entry=..., hasProperty=0x0, property=0x0)
--Type <RET> for more, q to quit, c to continue without paging--
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4qobjectwrapper.cpp:416
#34 0x00007f75ce44dc73 in QV4::QQmlTypeWrapper::virtualGet(QV4::Managed const*, QV4::PropertyKey, QV4::Value const*, bool*) (m=0x7f7590bb9580, id=..., receiver=0x7f7590bb9580, hasProperty=0x0)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmltypewrapper_p.h:65
#35 0x00007f75ce227a2c in QV4::Object::get(QV4::StringOrSymbol*, bool*, QV4::Value const*) const (receiver=0x7f7590bb9580, hasProperty=0x0, name=<optimized out>, this=0x7f7590bb9580)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/redhat-linux-build/include/QtQml/6.5.1/QtQml/private/../../../../../../src/qml/jsruntime/qv4string_p.h:140
#36 QV4::Lookup::getterFallback(QV4::Lookup*, QV4::ExecutionEngine*, QV4::Value const&) (l=<optimized out>, engine=0x186f6a0, object=<optimized out>)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4lookup.cpp:201
#37 0x00007f75ce2ba3fe in QV4::Moth::VME::interpret(QV4::JSTypesStackFrame*, QV4::ExecutionEngine*, char const*) (frame=0x59093, 
    frame@entry=0x7ffd9d83e8c0, engine=0x186f6a0, code=0x7f7568e7bc16 "<S\030\006\002") at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4vme_moth.cpp:731
#38 0x00007f75ce2c0327 in QV4::Moth::VME::exec(QV4::JSTypesStackFrame*, QV4::ExecutionEngine*) (frame=frame@entry=0x7ffd9d83e8c0, engine=engine@entry=0x186f6a0)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4vme_moth.cpp:544
#39 0x00007f75ce20a546 in QV4::doCall(QV4::Function*, QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext*)
    (self=<optimized out>, thisObject=thisObject@entry=0x7f7590bb9500, argv=argv@entry=0x7f7590bb9518, argc=<optimized out>, context=<optimized out>)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4function.cpp:54
#40 0x00007f75ce20a93a in QV4::Function::call(QV4::Value const*, QV4::Value const*, int, QV4::ExecutionContext*)
    (this=<optimized out>, thisObject=thisObject@entry=0x7f7590bb9500, argv=argv@entry=0x7f7590bb9518, argc=<optimized out>, context=<optimized out>)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/jsruntime/qv4function.cpp:79
#41 0x00007f75ce37b398 in QQmlJavaScriptExpression::evaluate(QV4::CallData*, bool*) (this=this@entry=0x18ab0a0, callData=callData@entry=0x7f7590bb94e8, isUndefined=isUndefined@entry=0x7ffd9d83ea80)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmljavascriptexpression.cpp:238
#42 0x00007f75ce306aa6 in QQmlBinding::evaluate(bool*) (this=this@entry=0x18ab0a0, isUndefined=isUndefined@entry=0x7ffd9d83ea80)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmlbinding.cpp:188
#43 0x00007f75ce306ba3 in QQmlBinding::doUpdate(QQmlJavaScriptExpression::DeleteWatcher const&, QFlags<QQmlPropertyData::WriteFlag>, QV4::Scope&) (this=0x18ab0a0, watcher=..., flags=..., scope=...)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmlbinding.cpp:698
#44 0x00007f75ce309f88 in QQmlBinding::update(QFlags<QQmlPropertyData::WriteFlag>) (this=0x18ab0a0, flags=...) at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmlbinding.cpp:164
#45 0x00007f75ce3a969e in QQmlObjectCreator::finalize(QQmlInstantiationInterrupt&) (this=0x173f290, interrupt=...)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmlobjectcreator.cpp:1438
#46 0x00007f75ce32294d in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) (enginePriv=0x1b7f2d0, state=state@entry=0x6254eb0)
    at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/redhat-linux-build/include/QtQml/6.5.1/QtQml/private/../../../../../../src/qml/qml/ftw/qbipointer_p.h:131

#47 0x00007f75ce328883 in QQmlComponentPrivate::completeCreate() (this=0x6254e00) at /usr/src/debug/qt6-qtdeclarative-6.5.1-1.fc38.x86_64/src/qml/qml/qqmlcomponent.cpp:1204
#48 0x00007f75cfbdae42 in PlasmaQuick::SharedQmlEngine::completeInitialization(QHash<QString, QVariant> const&) (this=0x5793070, initialProperties=<optimized out>)
    at /home/nate/kde/src/plasma-framework/src/plasmaquick/sharedqmlengine.cpp:245
#49 0x00007f75cfbbaf66 in PlasmaQuick::AppletQuickItem::itemForApplet(Plasma::Applet*) (applet=<optimized out>) at /usr/include/qt6/QtCore/qhash.h:832
#50 0x00007f75903dece5 in AppletsLayout::appletRemoved(Plasma::Applet*) (this=0x7f75701daf60, applet=<optimized out>)
    at /home/nate/kde/src/plasma-workspace/components/containmentlayoutmanager/appletslayout.cpp:716
#51 0x00007f75cc1ddcd4 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7ffd9d83f120, r=0x7f75701daf60, this=0x1fc08c0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobjectdefs_impl.h:363
#52 doActivate<false>(QObject*, int, void**) (sender=0x1b0f4d0, signal_index=28, argv=0x7ffd9d83f120) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:3992
#53 0x00007f75cc1d4757 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=<optimized out>, m=m@entry=0x7f75cf91c200, local_signal_index=local_signal_index@entry=2, argv=argv@entry=0x7ffd9d83f120)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4052
#54 0x00007f75cf8aa5a2 in Plasma::Containment::appletRemoved(Plasma::Applet*) (this=<optimized out>, _t1=<optimized out>, _t1@entry=0x5951e40)
    at /home/nate/kde/build6/plasma-framework/src/plasma/KF6Plasma_autogen/include/moc_containment.cpp:947
#55 0x00007f75cf8c4c14 in Plasma::ContainmentPrivate::appletDeleted(Plasma::Applet*) (this=0x1ad94e0, applet=0x5951e40) at /home/nate/kde/src/plasma-framework/src/plasma/private/containment_p.cpp:206
#56 0x00007f75cc1de248 in doActivate<false>(QObject*, int, void**) (sender=0x5951e40, signal_index=17, argv=0x7ffd9d83f270)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4004
#57 0x00007f75cc1d4757 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=sender@entry=0x5951e40, m=m@entry=0x7f75cf91be80, local_signal_index=local_signal_index@entry=14, argv=argv@entry=0x7ffd9d83f270)
--Type <RET> for more, q to quit, c to continue without paging--
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:4052
#58 0x00007f75cf8a3af2 in Plasma::Applet::appletDeleted(Plasma::Applet*) (this=this@entry=0x5951e40, _t1=<optimized out>, _t1@entry=0x5951e40)
    at /home/nate/kde/build6/plasma-framework/src/plasma/KF6Plasma_autogen/include/moc_applet.cpp:1173
#59 0x00007f75cf8a3b2a in Plasma::Applet::~Applet() (this=0x5951e40, __in_chrg=<optimized out>) at /home/nate/kde/src/plasma-framework/src/plasma/applet.cpp:77
#60 0x00007f7568a50099 in IconApplet::~IconApplet() (this=0x5951e40, __in_chrg=<optimized out>) at /home/nate/kde/src/plasma-workspace/applets/icon/iconapplet.cpp:54
#61 0x00007f75cc1cf599 in QObject::event(QEvent*) (this=0x5951e40, e=0x26543b0) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qobject.cpp:1378
#62 0x00007f75cd9c0b08 in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x5951e40, e=0x26543b0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:3287
#63 0x00007f75cc17c308 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x5951e40, event=0x26543b0)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1115
#64 0x00007f75cc17c50d in QCoreApplication::sendEvent(QObject*, QEvent*) (receiver=<optimized out>, event=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1533
#65 0x00007f75cc17fd75 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x12be660)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1895
#66 0x00007f75cc1800ad in QCoreApplication::sendPostedEvents(QObject*, int) (receiver=<optimized out>, event_type=<optimized out>)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qcoreapplication.cpp:1754
#67 0x00007f75cc4206df in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=0x131ba20) at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:243
#68 0x00007f75cb56239c in g_main_dispatch (context=0x7f75b4000f10) at ../glib/gmain.c:3460
#69 g_main_context_dispatch (context=0x7f75b4000f10) at ../glib/gmain.c:4200
#70 0x00007f75cb5c0438 in g_main_context_iterate.isra.0 (context=0x7f75b4000f10, block=1, dispatch=1, self=<optimized out>) at ../glib/gmain.c:4276
#71 0x00007f75cb55fa23 in g_main_context_iteration (context=0x7f75b4000f10, may_block=1) at ../glib/gmain.c:4343
#72 0x00007f75cc41ff7f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x12c3f50, flags=...)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:393
#73 0x00007f75cc188e93 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd9d83f710, flags=..., flags@entry=...)
    at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/global/qflags.h:34
#74 0x00007f75cc184b3d in QCoreApplication::exec() () at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/corelib/global/qflags.h:74
#75 0x00007f75cc9f85cd in QGuiApplication::exec() () at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/gui/kernel/qguiapplication.cpp:1894
#76 0x00007f75cd9c0a79 in QApplication::exec() () at /usr/src/debug/qt6-qtbase-6.5.1-1.fc38.x86_64/src/widgets/kernel/qapplication.cpp:2566
#77 0x0000000000424fc0 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /home/nate/kde/src/plasma-workspace/shell/main.cpp:242

Cannot reproduce my method to reproduce the issue anymore. I'm reasonably sure this was Bug 472892, which is fixed now.

*** This bug has been marked as a duplicate of bug 472892 ***