SUMMARY
plasmashell crashes after a panel with a system tray applet is removed (after clicking the close button in the undo notification to fully remove the panel).


STEPS TO REPRODUCE
1. Remove a panel with a system tray applet
2. Click the close button in the undo notification

OBSERVED RESULT
Crash

EXPECTED RESULT
No crash

SOFTWARE/OS VERSIONS
Information for package plasma5-workspace:
------------------------------------------
Repository     : @System
Name           : plasma5-workspace
Version        : 5.24.80git.20220512T172107~ce8b46ec-ku.113.1
Arch           : x86_64
Vendor         : obs://build.opensuse.org/KDE:Unstable
Installed Size : 27.5 MiB
Installed      : Yes
Status         : up-to-date
Source package : plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.src
Upstream URL   : http://www.kde.org/
Summary        : The KDE Plasma Workspace Components
Description    : 
    This package contains the basic packages for a Plasma workspace.


ADDITIONAL INFORMATION
(gdb) bt
#0  0x00007f162b485ca4 in SystemTray::onEnabledAppletsChanged() (this=0x55cbb6a17740)
    at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/applets/systemtray/systemtray.cpp:288
#1  0x00007f163f62b453 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7ffef86453e0, r=0x55cbb6a17740, this=0x55cbb18b5b10)
    at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#2  doActivate<false>(QObject*, int, void**) (sender=0x55cbb227f6b0, signal_index=4, argv=0x7ffef86453e0) at kernel/qobject.cpp:3886
#3  0x00007f163f6247af in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    (sender=sender@entry=0x55cbb227f6b0, m=m@entry=0x7f162b4b2480 <SystemTraySettings::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffef86453e0) at kernel/qobject.cpp:3946
#4  0x00007f162b496b09 in SystemTraySettings::enabledPluginsChanged(QStringList const&, QStringList const&)
    (_t2=..., _t1=..., this=0x55cbb227f6b0)
    at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/build/applets/systemtray/systemtraymodel_static_autogen/EWIEGA46WW/moc_systemtraysettings.cpp:152
#5  SystemTraySettings::notifyAboutChangedEnabledPlugins(QStringList const&, QStringList const&)
    (enabledPluginsNew=..., enabledPluginsOld=..., this=0x55cbb227f6b0)
    at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/applets/systemtray/systemtraysettings.cpp:163
#6  SystemTraySettings::loadConfig() (this=0x55cbb227f6b0)
    at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/applets/systemtray/systemtraysettings.cpp:120
#7  0x00007f163f62b453 in QtPrivate::QSlotObjectBase::call(QObject*, void**) (a=0x7ffef86454c0, r=0x55cbb227f6b0, this=0x55cbb227efc0)
    at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
#8  doActivate<false>(QObject*, int, void**) (sender=0x55cbb227e4f0, signal_index=3, argv=0x7ffef86454c0) at kernel/qobject.cpp:3886
#9  0x00007f16401d02c8 in KCoreConfigSkeleton::save() (this=0x55cbb227e4f0)
    at /usr/src/debug/kconfig-5.94.0git.20220504T093732~a0bf7b8-ku.4.1.x86_64/src/core/kcoreconfigskeleton.cpp:1245
#10 0x00007f164161cded in KDeclarative::ConfigPropertyMapPrivate::writeConfig() (this=0x55cbb43e5ae0)
    at /usr/src/debug/kdeclarative-5.94.0git.20220511T221457~22f6b1e-ku.4.1.x86_64/src/kdeclarative/configpropertymap.cpp:139
#11 KDeclarative::ConfigPropertyMap::~ConfigPropertyMap() (this=0x55cbb443f9e0, this=<optimized out>)
    at /usr/src/debug/kdeclarative-5.94.0git.20220511T221457~22f6b1e-ku.4.1.x86_64/src/kdeclarative/configpropertymap.cpp:65
#12 0x00007f164161ce19 in KDeclarative::ConfigPropertyMap::~ConfigPropertyMap() (this=0x55cbb443f9e0, this=<optimized out>)
    at /usr/src/debug/kdeclarative-5.94.0git.20220511T221457~22f6b1e-ku.4.1.x86_64/src/kdeclarative/configpropertymap.cpp:68
#13 0x00007f163f61e99e in QObjectPrivate::deleteChildren() (this=0x55cbb6a1c7f0) at kernel/qobject.cpp:2104
#14 0x00007f163f629664 in QObject::~QObject() (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1082
#15 0x00007f163883ebca in ContainmentInterface::~ContainmentInterface() (this=0x55cbb6a15e20, this=<optimized out>)
    at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/scriptengines/qml/plasmoid/containmentinterface.h:38
#16 ContainmentInterface::~ContainmentInterface() (this=0x55cbb6a15e20, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/scriptengines/qml/plasmoid/containmentinterface.h:38
#17 0x00007f163f61e99e in QObjectPrivate::deleteChildren() (this=0x55cbb6a37b00) at kernel/qobject.cpp:2104
#18 0x00007f163f629664 in QObject::~QObject() (this=this@entry=0x55cbb6a22150, __in_chrg=<optimized out>) at kernel/qobject.cpp:1082
#19 0x00007f16416f1863 in Plasma::ScriptEngine::~ScriptEngine() (this=this@entry=0x55cbb6a22150, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/scripting/scriptengine.cpp:48
#20 0x00007f16416f18be in Plasma::AppletScript::~AppletScript() (this=this@entry=0x55cbb6a22150, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/scripting/appletscript.cpp:35
#21 0x00007f16388317fb in DeclarativeAppletScript::~DeclarativeAppletScript() (this=0x55cbb6a22150, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/scriptengines/qml/plasmoid/declarativeappletscript.cpp:68
#22 DeclarativeAppletScript::~DeclarativeAppletScript() (this=0x55cbb6a22150, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/scriptengines/qml/plasmoid/declarativeappletscript.cpp:68
#23 0x00007f16416c248a in Plasma::AppletPrivate::~AppletPrivate() (this=0x55cbb6a16c80, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/private/applet_p.cpp:89
#24 0x00007f16416b4174 in Plasma::AppletPrivate::~AppletPrivate() (this=0x55cbb6a16c80, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/private/applet_p.cpp:83
#25 Plasma::Applet::~Applet() (this=this@entry=0x55cbb6a17740, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/applet.cpp:165
#26 0x00007f16416b43a0 in Plasma::Containment::~Containment() (this=this@entry=0x55cbb6a17740, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/containment.cpp:83
#27 0x00007f162b47d8ec in SystemTray::~SystemTray() (this=0x55cbb6a17740, this=<optimized out>) at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/applets/systemtray/systemtray.cpp:38
#28 SystemTray::~SystemTray() (this=0x55cbb6a17740, this=<optimized out>) at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/applets/systemtray/systemtray.cpp:38
#29 0x00007f163f61e99e in QObjectPrivate::deleteChildren() (this=0x55cbb6a1a6e0) at kernel/qobject.cpp:2104
#30 0x00007f163f629664 in QObject::~QObject() (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1082
#31 0x00007f162b5a7699 in SystemTrayContainer::~SystemTrayContainer() (this=0x55cbb6a15960, this=<optimized out>) at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/applets/systemtray/container/systemtraycontainer.cpp:24
#32 0x00007f163f61e99e in QObjectPrivate::deleteChildren() (this=0x55cbb668eb70) at kernel/qobject.cpp:2104
#33 0x00007f163f629664 in QObject::~QObject() (this=<optimized out>, __in_chrg=<optimized out>) at kernel/qobject.cpp:1082
#34 0x00007f16416b4479 in Plasma::Containment::~Containment() (this=0x55cbb65b1400, this=<optimized out>) at /usr/src/debug/plasma-framework-5.94.0git.20220512T145121~b214c9ad-ku.26.1.x86_64/src/plasma/containment.cpp:83
#35 0x00007f163f62102f in QObject::event(QEvent*) (this=0x55cbb65b1400, e=0x55cbb7eefcd0) at kernel/qobject.cpp:1301
#36 0x00007f1640394b0f in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x55cbb65b1400, e=0x55cbb7eefcd0) at kernel/qapplication.cpp:3632
#37 0x00007f163f5f4b5a in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x55cbb65b1400, event=0x55cbb7eefcd0) at kernel/qcoreapplication.cpp:1064
#38 0x00007f163f5f7b97 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) (receiver=0x0, event_type=0, data=0x55cbb154aa90) at kernel/qcoreapplication.cpp:1821
#39 0x00007f163f64cc33 in postEventSourceDispatch(GSource*, GSourceFunc, gpointer) (s=s@entry=0x55cbb16585e0) at kernel/qeventdispatcher_glib.cpp:277
#40 0x00007f163d8f9122 in g_main_dispatch (context=0x7f1634005010) at ../glib/gmain.c:3417
#41 g_main_context_dispatch (context=0x7f1634005010) at ../glib/gmain.c:4135
#42 0x00007f163d8f94b8 in g_main_context_iterate (context=context@entry=0x7f1634005010, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4211
#43 0x00007f163d8f956f in g_main_context_iteration (context=0x7f1634005010, may_block=1) at ../glib/gmain.c:4276
#44 0x00007f163f64c2b4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x55cbb166a6f0, flags=...) at kernel/qeventdispatcher_glib.cpp:423
#45 0x00007f163f5f355b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffef8645d70, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#46 0x00007f163f5fb820 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#47 0x00007f163fa4561c in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1867
#48 0x00007f1640394a85 in QApplication::exec() () at kernel/qapplication.cpp:2824
#49 0x000055cbb05b9192 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma5-workspace-5.24.80git.20220512T172107~ce8b46ec-ku.113.1.x86_64/shell/main.cpp:240