*** Bug 465706 has been marked as a duplicate of this bug. ***

Created attachment 159624 [details]
New crash information added by DrKonqi

plasmashell (5.27.5) using Qt 5.15.8

I was switching windows and plasmashell crashes. The backtrace looks similar with bug 465706.

-- Backtrace (Reduced):
#5  0x00007faefd277c86 in QtQml::qmlExecuteDeferred(QObject*) () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007faefd749059 in QQuickTransition::prepare(QList<QQuickStateAction>&, QList<QQmlProperty>&, QQuickTransitionManager*, QObject*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007faefd73e997 in QQuickTransitionManager::transition(QList<QQuickStateAction> const&, QQuickTransition*, QObject*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007faefbadd50d in QObject::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007faefc962fae in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5

Should be fixed in Qt6.6.

*** Bug 470475 has been marked as a duplicate of this bug. ***

*** Bug 461072 has been marked as a duplicate of this bug. ***

*** Bug 471209 has been marked as a duplicate of this bug. ***

*** Bug 471948 has been marked as a duplicate of this bug. ***

*** Bug 471449 has been marked as a duplicate of this bug. ***

Created attachment 160322 [details]
New crash information added by DrKonqi

plasmashell (5.27.6) using Qt 5.15.10

This crash happened to me after closing a notification about the WiFi network not having internet access and needing to "log in to the network"

-- Backtrace (Reduced):
#6  0x00007fb21c08072f in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator->() const (this=0x8) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:118
[...]
#9  QQmlEnginePrivate::get(QQmlEngine*) (e=0x0) at qml/qqmlengine_p.h:424
#10 QtQml::qmlExecuteDeferred(QObject*) (object=object@entry=0x5628b702bf30) at qml/qqmlengine.cpp:1592
#11 0x00007fb21c5536ee in QQuickTransition::prepare(QList<QQuickStateAction>&, QList<QQmlProperty>&, QQuickTransitionManager*, QObject*) (this=this@entry=0x5628b702bf30, actions=..., after=..., manager=manager@entry=0x5628b6106a90, defaultTarget=0x5628b90f28c0) at util/qquicktransition.cpp:259
#12 0x00007fb21c548a85 in QQuickTransitionManager::transition(QList<QQuickStateAction> const&, QQuickTransition*, QObject*) (this=0x5628b6106a90, list=<optimized out>, transition=0x5628b702bf30, defaultTarget=<optimized out>) at util/qquicktransitionmanager.cpp:207

Can be fixed by https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/3071. Can anyone test it?

(In reply to Fushan Wen from comment #10)
> Can be fixed by
> https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/3071. Can
> anyone test it?

I don't have a reliable reproducer (and neither other reporters, as far as I can tell), so I can't test that the MR solves the problem. But the fix seems benign enough - how about merging it and seeing if people stop reporting?

Git commit b61ef42d83cfc27cd0d70a55c309163571e69e84 by Fushan Wen.
Committed on 17/07/2023 at 13:45.
Pushed by fusionfuture into branch 'Plasma/5.27'.

applets/notifications: add workaround for QTBUG-100392

Citing the bugreport:

```
Qt/QML crashes at runtime when an animation is started for the second time after caching its targets' properties, but one or more of those targets are actually destroyed by the time it restarts.

It is likely because the list<> property type does not emit any on*Changed() signal when any of its items are destroyed — either manually by invoking QtObject::destroy() method, by an Instantiator when it removes its managed objects, or in any other way. Lists start showing null values after control returns to the even loop (so that Qt finishes actually destroying an object and cleans up all references it can find), but according to the backtrace Animation does some property caching, and so it tries to access freed memory leading to Segmentation fault.
```

Ref: https://bugreports.qt.io/browse/QTBUG-100392
Ref: https://invent.kde.org/qt/qt/qtdeclarative/-/commit/8a74155411d7a22bb8efa405fe59a681e47e6b45
FIXED-IN: 5.27.7

M  +13   -5    applets/notifications/package/contents/ui/CompactRepresentation.qml

https://invent.kde.org/plasma/plasma-workspace/-/commit/b61ef42d83cfc27cd0d70a55c309163571e69e84

*** Bug 472430 has been marked as a duplicate of this bug. ***

*** Bug 473055 has been marked as a duplicate of this bug. ***

*** Bug 473058 has been marked as a duplicate of this bug. ***

*** Bug 472755 has been marked as a duplicate of this bug. ***

Created attachment 160813 [details]
long backtrace

I can reproduce this crash with the steps from duplicate bug 473058.

Operating System: Arch Linux 
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10
Graphics Platform: Wayland

(In reply to Patrick Silva from comment #17)
> I can reproduce this crash with the steps from duplicate bug 473058.

I tried the reproduction steps from bug 473058, reproduced here to make sure I understand them:
1. RMB on desktop, choose "Add Panel" -> "default panel". A panel appears on the screen.
2. RMB on panel, choose "Enter Edit mode". Panel editing UI appears
3. LMB on "More options" button on panel editing UI.
4. LMB on "Remove panel" entry in the menu that opens. Panel disappears and notification appears.
5. LMB on desktop's "edit mode" top toolbar's close button (red circled X button). 
6. LMB on notification close button (red circled X button).
(steps 5 and 6 can be switched).

Initially I couldn't repro with this process, but after a few tries it started crashing and now reproduces quite often - though not 100% of the time. I also get a couple different stack traces (when I get a crash handler - which isn't for 100% of the crashes either).

Here's the standard one (seems like the null pointer):

---8<---
Thread 1 (Thread 0x7fd09d0a9240 (LWP 3149618)):
[KCrash Handler]
#6  0x00007fd0a2e8072f in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator->() const (this=0x8) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qscopedpointer.h:118
#7  qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > >(QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >&) (ptr=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qglobal.h:1149
#8  QQmlEngine::d_func() (this=0x0) at qml/qqmlengine.h:172
#9  QQmlEnginePrivate::get(QQmlEngine*) (e=0x0) at qml/qqmlengine_p.h:424
#10 QtQml::qmlExecuteDeferred(QObject*) (object=object@entry=0x55fff92839f0) at qml/qqmlengine.cpp:1592
#11 0x00007fd0a33536ee in QQuickTransition::prepare(QList<QQuickStateAction>&, QList<QQmlProperty>&, QQuickTransitionManager*, QObject*) (this=this@entry=0x55fff92839f0, actions=..., after=..., manager=manager@entry=0x55fffb28a690, defaultTarget=0x55fffa881bf0) at util/qquicktransition.cpp:259
#12 0x00007fd0a3348a85 in QQuickTransitionManager::transition(QList<QQuickStateAction> const&, QQuickTransition*, QObject*) (this=0x55fffb28a690, list=<optimized out>, transition=0x55fff92839f0, defaultTarget=<optimized out>) at util/qquicktransitionmanager.cpp:207
...
---8<---

And here's the other one (looks like it crashed in the middle of handling an exception):

---8<---
Thread 1 (Thread 0x7f5ce29ff6c0 (LWP 3164535)):
[KCrash Handler]
#6  __pthread_kill_implementation (no_tid=0, signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
#7  __pthread_kill_internal (signo=11, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
#8  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=11) at ./nptl/pthread_kill.c:89
#9  0x00007f5ce6c3c406 in __GI_raise (sig=11) at ../sysdeps/posix/raise.c:26
#10 0x00007f5ce6c3c4b0 in <signal handler called> () at /lib/x86_64-linux-gnu/libc.so.6
#11 0x00007f5ce6d0fd7f in __GI___poll (fds=0x7f5cdc0015e0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#12 0x00007f5ce62cd0ee in g_main_context_poll (priority=<optimized out>, n_fds=2, fds=0x7f5cdc0015e0, timeout=<optimized out>, context=0x7f5cdc000c50) at ../../../glib/gmain.c:4584
#13 g_main_context_iterate.constprop.0 (context=0x7f5cdc000c50, block=<optimized out>, dispatch=1, self=<optimized out>) at ../../../glib/gmain.c:4271
#14 0x00007f5ce62711b0 in g_main_context_iteration (context=0x7f5cdc000c50, may_block=1) at ../../../glib/gmain.c:4343
#15 0x00007f5ce77163de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x7f5cdc000b70, flags=...) at kernel/qeventdispatcher_glib.cpp:425
#16 0x00007f5ce76bb79b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7f5ce29febd0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
#17 0x00007f5ce74cd992 in QThread::exec() (this=this@entry=0x7f5ce82f7d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#18 0x00007f5ce827f0eb in QDBusConnectionManager::run() (this=0x7f5ce82f7d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at ./src/dbus/qdbusconnection.cpp:179
#19 0x00007f5ce74cec03 in operator() (__closure=<optimized out>, __closure=<optimized out>) at thread/qthread_unix.cpp:350
#20 (anonymous namespace)::terminate_on_exception<QThreadPrivate::start(void*)::<lambda()> > (t=<optimized out>, t=<optimized out>) at thread/qthread_unix.cpp:287
#21 QThreadPrivate::start(void*) (arg=0x7f5ce82f7d80 <(anonymous namespace)::Q_QGS__q_manager::innerFunction()::holder>) at thread/qthread_unix.cpp:310
#22 0x00007f5ce6c8f18a in start_thread (arg=<optimized out>) at ./nptl/pthread_create.c:444
#23 0x00007f5ce6d1dbd0 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
---8<---

My system details:

Operating System: KDE neon Testing Edition
KDE Plasma Version: 5.27.7
KDE Frameworks Version: 5.109.0
Qt Version: 5.15.10
Kernel Version: 6.2.0-26-generic (64-bit)
Graphics Platform: offscreen
Processors: 11 × Unknown Type, 9 × 12th Gen Intel® Core™ i7-12700H
Memory: 31.0 GiB of RAM
Graphics Processor: Mesa Intel® Graphics

Created attachment 160891 [details]
another instance of the full crash from my system

Created attachment 160892 [details]
The weird "crash during exception" handling trace

I can reproduce on neon unstable too.

*** Bug 473466 has been marked as a duplicate of this bug. ***

*** Bug 473520 has been marked as a duplicate of this bug. ***

I confirm the bug on 5.27.7, this randomly happens when you fast close any kind of notification, this occurs once or two times in lapse of at least two days.



Backtrace ----------------------------------------------------------------------------------------------

Core was generated by `/usr/bin/plasmashell --no-respawn'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007fd0d603ce5d in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator-> (this=<optimized out>, this=<optimized out>)
    at /usr/include/qt/QtCore/qscopedpointer.h:118

warning: Source file is more recent than executable.
118             return d;
[Current thread is 1 (Thread 0x7fd0cfba2ec0 (LWP 1222))]
(gdb) bt full
#0  0x00007fd0d603ce5d in QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::operator->() const (this=0x8, this=<optimized out>) at /usr/include/qt/QtCore/qscopedpointer.h:118
        ep = <optimized out>
        state = {constructionStates = {d = 0x0}}
        data = 0x5620cc247400
#1  qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > >(QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >&) (ptr=..., ptr=<optimized out>)
    at /usr/include/qt/QtCore/qglobal.h:1149
        ep = <optimized out>
        state = {constructionStates = {d = 0x0}}
        data = 0x5620cc247400
#2  QQmlEngine::d_func() (this=0x0) at /usr/src/debug/qt5-declarative/qtdeclarative/src/qml/qml/qqmlengine.h:172
        ep = <optimized out>
        state = {constructionStates = {d = 0x0}}
        data = 0x5620cc247400
#3  QQmlEnginePrivate::get(QQmlEngine*) (e=0x0, e=<optimized out>) at /usr/src/debug/qt5-declarative/qtdeclarative/src/qml/qml/qqmlengine_p.h:424
        ep = <optimized out>
        state = {constructionStates = {d = 0x0}}
        data = 0x5620cc247400
#4  QtQml::qmlExecuteDeferred(QObject*) (object=0x5620cc2473f0) at /usr/src/debug/qt5-declarative/qtdeclarative/src/qml/qml/qqmlengine.cpp:1592
        ep = <optimized out>
        state = {constructionStates = {d = 0x0}}
        data = 0x5620cc247400
#5  0x00007fd0d6550c3e in QQuickTransition::prepare(QList<QQuickStateAction>&, QList<QQmlProperty>&, QQuickTransitionManager*, QObject*) () at /usr/lib/libQt5Quick.so.5
#6  0x00007fd0d65456f3 in QQuickTransitionManager::transition(QList<QQuickStateAction> const&, QQuickTransition*, QObject*) () at /usr/lib/libQt5Quick.so.5
#7  0x00007fd0d4ac40ee in QObject::event(QEvent*) (this=0x5620cc5e2c30, e=0x7ffd6b0e1ad0) at kernel/qobject.cpp:1324
#8  0x00007fd0d577893f in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=<optimized out>, receiver=0x5620cc5e2c30, e=0x7ffd6b0e1ad0) at kernel/qapplication.cpp:3640
        consumed = false
        filtered = false
#9  0x00007fd0d4a9c6f8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x5620cc5e2c30, event=0x7ffd6b0e1ad0) at kernel/qcoreapplication.cpp:1064
        selfRequired = true
        result = false
        cbdata = {0x5620cc5e2c30, 0x7ffd6b0e1ad0, 0x7ffd6b0e1a6f}
        d = <optimized out>
        threadData = 0x5620c7792550
        scopeLevelCounter = {threadData = 0x5620c7792550}
#10 0x00007fd0d4aead6b in QTimerInfoList::activateTimers() (this=0x5620c77d6320) at kernel/qtimerinfo_unix.cpp:643
        e = {<QEvent> = {_vptr.QEvent = 0x7fd0d4d283e8 <vtable for QTimerEvent+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4b8a260 <_ZL25qt_meta_stringdata_QEvent.lto_priv.0>, data = 0x7fd0d4b89ca0 <_ZL19qt_meta_data_QEvent.lto_priv.0>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}, d = 0x0, t = 1, posted = 0, spont = 0, m_accept = 1, reserved = 3425}, id = 2}
        currentTimerInfo = 0x0
        n_act = 3
--Type <RET> for more, q to quit, c to continue without paging--c
        maxCount = 0
        currentTime = {tv_sec = 701, tv_nsec = 150077791}
#11 0x00007fd0d4aeb35a in timerSourceDispatch(GSource*, GSourceFunc, gpointer) (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:183
        timerSource = <optimized out>
#12 0x00007fd0d3739a31 in g_main_dispatch (context=0x7fd0c8000ee0) at ../glib/glib/gmain.c:3460
        dispatch = 0x7fd0d4aeb330 <timerSourceDispatch(GSource*, GSourceFunc, gpointer)>
        prev_source = 0x0
        begin_time_nsec = 701150077184
        was_in_call = 0
        user_data = 0x0
        callback = 0x0
        cb_funcs = 0x0
        cb_data = 0x0
        need_destroy = <optimized out>
        source = 0x5620c77d62c0
        current = 0x5620c7abf380
        i = 2
#13 g_main_context_dispatch (context=0x7fd0c8000ee0) at ../glib/glib/gmain.c:4200
#14 0x00007fd0d3796cc9 in g_main_context_iterate.isra.0 (context=context@entry=0x7fd0c8000ee0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>)
    at ../glib/glib/gmain.c:4276
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = 11
        allocated_nfds = <optimized out>
        fds = <optimized out>
        begin_time_nsec = 701143072881
#15 0x00007fd0d37370e2 in g_main_context_iteration (context=0x7fd0c8000ee0, may_block=1) at ../glib/glib/gmain.c:4343
        retval = <optimized out>
#16 0x00007fd0d4aeb51c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (this=0x5620c77d6210, flags=...) at kernel/qeventdispatcher_glib.cpp:423
        d = 0x5620c77d6c90
        canWait = true
        savedFlags = {i = 0}
        result = <optimized out>
#17 0x00007fd0d4a9b404 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (this=this@entry=0x7ffd6b0e1d80, flags=..., flags@entry=...)
    at ../../include/QtCore/../../src/corelib/global/qflags.h:69
        d = 0x5620c7ab8680
        threadData = <optimized out>
        locker = {val = 94698785549304}
        app = <optimized out>
#18 0x00007fd0d4a9c8a3 in QCoreApplication::exec() () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
        threadData = 0x5620c7792550
        eventLoop = {<QObject> = {_vptr.QObject = 0x7fd0d4d26750 <vtable for QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4b95b00 <_ZL26qt_meta_stringdata_QObject.lto_priv.0>, data = 0x7fd0d4b959e0 <_ZL20qt_meta_data_QObject.lto_priv.0>, static_metacall = 0x7fd0d4ad1ac0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x5620c7ab8680}, static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4bc6720 <_ZL21qt_meta_stringdata_Qt.lto_priv.0>, data = 0x7fd0d4bc38a0 <_ZL15qt_meta_data_Qt.lto_priv.0>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7fd0d4d1f5a0 <QObject::staticMetaObject>}, stringdata = 0x7fd0d4b914c0 <_ZL29qt_meta_stringdata_QEventLoop.lto_priv.0>, data = 0x7fd0d4b91460 <_ZL23qt_meta_data_QEventLoop.lto_priv.0>, static_metacall = 0x7fd0d4a99130 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        returnCode = <optimized out>
#19 0x00007fd0d4f3bef2 in QGuiApplication::exec() () at kernel/qguiapplication.cpp:1870
#20 0x00007fd0d5776cda in QApplication::exec() () at kernel/qapplication.cpp:2832
#21 0x00005620c597216c in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma-workspace/plasma-workspace-5.27.7/shell/main.cpp:235
        format = {d = 0x5620c77b5050}
        qpaVariable = <optimized out>
        app = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x7fd0d5c85620 <vtable for QApplication+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4b95b00 <_ZL26qt_meta_stringdata_QObject.lto_priv.0>, data = 0x7fd0d4b959e0 <_ZL20qt_meta_data_QObject.lto_priv.0>, static_metacall = 0x7fd0d4ad1ac0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x5620c77b57c0}, static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4bc6720 <_ZL21qt_meta_stringdata_Qt.lto_priv.0>, data = 0x7fd0d4bc38a0 <_ZL15qt_meta_data_Qt.lto_priv.0>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7fd0d4d1f5a0 <QObject::staticMetaObject>}, stringdata = 0x7fd0d4b91240 <_ZL35qt_meta_stringdata_QCoreApplication.lto_priv.0>, data = 0x7fd0d4b91120 <_ZL29qt_meta_data_QCoreApplication.lto_priv.0>, static_metacall = 0x7fd0d4aa3cb0 <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, static self = 0x7ffd6b0e1f00}, static staticMetaObject = {d = {superdata = {direct = 0x7fd0d4d243a0 <QCoreApplication::staticMetaObject>}, stringdata = 0x7fd0d5389b00 <_ZL34qt_meta_stringdata_QGuiApplication.lto_priv.0>, data = 0x7fd0d5389880 <_ZL28qt_meta_data_QGuiApplication.lto_priv.0>, static_metacall = 0x7fd0d4f4b290 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7fd0d545be40 <QGuiApplication::staticMetaObject>}, stringdata = 0x7fd0d5b58820 <_ZL31qt_meta_stringdata_QApplication.lto_priv.0>, data = 0x7fd0d5b586a0 <_ZL25qt_meta_data_QApplication.lto_priv.0>, static_metacall = 0x7fd0d577a1c0 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}}
        aboutData = {d = std::unique_ptr<KAboutDataPrivate> = {get() = 0x5620c7a2d420}}
        replace = <optimized out>
        corona = <optimized out>
        service = {<QObject> = {_vptr.QObject = 0x7fd0d6a4d300 <vtable for KDBusService+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4b95b00 <_ZL26qt_meta_stringdata_QObject.lto_priv.0>, data = 0x7fd0d4b959e0 <_ZL20qt_meta_data_QObject.lto_priv.0>, static_metacall = 0x7fd0d4ad1ac0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d_ptr = {d = 0x5620c7a27fd0}, static staticQtMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7fd0d4bc6720 <_ZL21qt_meta_stringdata_Qt.lto_priv.0>, data = 0x7fd0d4bc38a0 <_ZL15qt_meta_data_Qt.lto_priv.0>, static_metacall = 0x0, relatedMetaObjects = 0x0, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x7fd0d4d1f5a0 <QObject::staticMetaObject>}, stringdata = 0x7fd0d6a48120 <qt_meta_stringdata_KDBusService>, data = 0x7fd0d6a47540 <qt_meta_data_KDBusService>, static_metacall = 0x7fd0d6a3cdd0 <KDBusService::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, extradata = 0x0}}, d = std::unique_ptr<KDBusServicePrivate> = {get() = 0x5620c7a172e0}}
(gdb)

*** Bug 473621 has been marked as a duplicate of this bug. ***

*** Bug 472821 has been marked as a duplicate of this bug. ***

*** Bug 472513 has been marked as a duplicate of this bug. ***

*** Bug 466724 has been marked as a duplicate of this bug. ***

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A possibly relevant merge request was started @ https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/3217

*** Bug 473980 has been marked as a duplicate of this bug. ***

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Created attachment 161932 [details]
Logs from plasmashell crash

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A possibly relevant merge request was started @ https://invent.kde.org/qt/qt/qtdeclarative/-/merge_requests/53

This is caused by a bug that's fixed in Qt 6. We have identified the most important commit that fixes it and backported it to our Qt 5 patch collection; see https://invent.kde.org/qt/qt/qtdeclarative/-/merge_requests/54. We believe this should fix the problem either 100%, or at least 90%. The reason for that is that many more QML robustness improvements have been added to Qt 6 beyond that one, and most of them are unfortunately not feasible to backport to Qt 5.

Still, it's fixed in Qt 6, and either entirely or at least mostly fixed for Qt 5 with the latest release of the patch collection. That's the best we can do for now, so thanks everyone for your patience and undestanding!

*** Bug 476184 has been marked as a duplicate of this bug. ***

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*** Bug 484954 has been marked as a duplicate of this bug. ***

*** Bug 486232 has been marked as a duplicate of this bug. ***