Bug 505553

Summary: Discover crashed in AggregatedResultsStream::resourceDestruction() when I switched pages
Product: [Applications] Discover Reporter: Roke Julian Lockhart Beedell <4wy78uwh>
Component: discoverAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash CC: aleixpol, kdedev, mark, nate
Priority: NOR Keywords: drkonqi
Version First Reported In: 6.3.5   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
See Also: https://bugzilla.redhat.com/show_bug.cgi?id=2372594
https://bugs.kde.org/show_bug.cgi?id=504841
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report: https://crash-reports.kde.org/organizations/kde/issues/198013/events/99e6ca00ed81486dad8a466325bc3ff6/
Attachments: New crash information added by DrKonqi

Description Roke Julian Lockhart Beedell 2025-06-12 23:36:14 UTC 
Application: plasma-discover (6.3.5)

ApplicationNotResponding [ANR]: false
Qt Version: 6.9.1
Frameworks Version: 6.14.0
Operating System: Linux 6.14.9-300.fc42.x86_64 x86_64
Windowing System: Wayland
Distribution: "Fedora Linux 42 (KDE Plasma Desktop Edition)"
DrKonqi: 6.3.5 [CoredumpBackend]

-- Information about the crash:
Whilst quickly switching pages, Discover crashed. It may relate to the "Installed" page being slightly slower than all else.

The crash does not seem to be reproducible.

-- Backtrace (Reduced):
#5  0x00007ff11f74bde8 in AggregatedResultsStream::resourceDestruction (this=0x559e5dc0dfa0, obj=0x559e602e4510) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:356
#6  0x00007ff11c9657ba in QtPrivate::QSlotObjectBase::call (this=0x559e5da08cd0, r=0x559e5dc0dfa0, a=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#7  doActivate<false> (sender=0x559e602e4510, signal_index=0, argv=argv@entry=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4146
[...]
#10 QObject::destroyed (this=this@entry=0x559e602e4510, _t1=<optimized out>, _t1@entry=0x559e602e4510) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/redhat-linux-build/src/corelib/kernel/moc_qobject.cpp:186
#11 0x00007ff11c961c7e in QObject::~QObject (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1042


Reported using DrKonqi
Comment 1 Roke Julian Lockhart Beedell 2025-06-12 23:36:15 UTC 
Created attachment 182242 [details]
New crash information added by DrKonqi

DrKonqi auto-attaching complete backtrace.
Comment 2 Roke Julian Lockhart Beedell 2025-06-12 23:43:41 UTC 
(In reply to Roke Julian Lockhart Beedell from comment #0)

After having done as `gdb` recommended:

> ~~~
> Releasever     : 42
> Description    : dnf --enablerepo=*debug* install mesa-va-drivers-freeworld-debuginfo-25.0.7-1.fc42.x86_64
> Comment        : 
> Packages altered:
>   Action   Package                                                    Reason     Repository
>   Upgrade  mesa-va-drivers-freeworld-debuginfo-0:25.0.7-1.fc42.x86_64 User       rpmfusion-free-updates-debuginfo
>   Upgrade  mesa-freeworld-debuginfo-0:25.0.7-1.fc42.x86_64            Dependency rpmfusion-free-updates-debuginfo
>   Replaced mesa-freeworld-debuginfo-0:25.0.6-1.fc42.x86_64            Dependency @System
>   Replaced mesa-va-drivers-freeworld-debuginfo-0:25.0.6-1.fc42.x86_64 User       @System
> ~~~

I've quoted a manually-generated `bt full`, because I didn't have time to wait for Konqi to regenerate one:

> ~~~
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0) at pthread_kill.c:44
> 44            return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0;
> [Current thread is 1 (Thread 0x7ff1169e0dc0 (LWP 70831))]
> (gdb) bt full
> #0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0) at pthread_kill.c:44
>         tid = <optimized out>
>         ret = 0
>         pd = <optimized out>
>         old_mask = {__val = {0}}
>         ret = <optimized out>
> #1  0x00007ff11c2811e3 in __pthread_kill_internal (threadid=<optimized out>, signo=11) at pthread_kill.c:89
> No locals.
> #2  0x00007ff11c227afe in __GI_raise (sig=11) at ../sysdeps/posix/raise.c:26
>         ret = <optimized out>
> #3  0x00007ff11f69fef1 in KCrash::defaultCrashHandler (sig=11) at /usr/src/debug/kf6-kcrash-6.14.0-1.fc42.x86_64/src/kcrash.cpp:605
>         data = {<KCrash::MetadataWriter> = {_vptr.MetadataWriter = 0x7ff11f6a8808 <vtable for KCrash::Metadata+16>}, argv = {_M_elems = {0x0, 0x7ff11f6a66ed "--qtversion", 0x559e59e52790 "6.9.1", 0x7ff11f6a6700 "--kdeframeworksversion", 0x7ff11f6a66f9 "6.14.0", 0x7ff11f6a6738 "--platform", 
>               0x559e59efab80 "wayland", 0x7ff11f6a6769 "--appname", 0x559e59e494d0 "plasma-discover", 0x7ff11f6a6773 "--apppath", 0x559e59e48d90 "/usr/bin", 0x7ff11f6a6780 "--signal", 0x7ffcbf2b2306 "11", 0x7ff11f6a678e "--pid", 0x7ffcbf2b2310 "70831", 0x7ff11f6a6794 "--appversion", 
>               0x559e5a969cf0 "6.3.5", 0x7ff11f6a67a1 "--programname", 0x559e59e48d60 "Discover", 0x7ff11f6a67af "--bugaddress", 0x559e59e52be0 "submit@bugs.kde.org", 0x7ff11f6a67bc "--productname", 0x559e59e4d460 "discover/discover", 0x0 <repeats 15 times>}}, argc = 23, 
>           m_writer = 0x7ffcbf2b22b0}
>         platformName = {d = {d = 0x559e59efab70, ptr = 0x559e59efab80 "wayland", size = 7}, static _empty = 0 '\000'}
>         about = 0x559e59e4bba0
>         argv = 0x7ffcbf2b2338
>         ini = {<KCrash::MetadataWriter> = {_vptr.MetadataWriter = 0x7ff11f6a8838 <vtable for KCrash::MetadataINIWriter+16>}, writable = false, fd = 24}
>         sigtxt = "11\000\376\376\376\376\376\376\376"
>         pidtxt = "70831\000", '\376' <repeats 14 times>
>         argc = <optimized out>
>         crashRecursionCounter = 2
> #4  <signal handler called>
> No locals.
> #5  0x00007ff11f74bde8 in AggregatedResultsStream::resourceDestruction (this=0x559e5dc0dfa0, obj=0x559e602e4510) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:356
>         it = {i = 0x559e66eda000}
> #6  0x00007ff11c9657ba in QtPrivate::QSlotObjectBase::call (this=0x559e5da08cd0, r=0x559e5dc0dfa0, a=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
> No locals.
> #7  doActivate<false> (sender=0x559e602e4510, signal_index=0, argv=argv@entry=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4146
>         obj = {m_slotObject = std::unique_ptr<QtPrivate::QSlotObjectBase> = {get() = 0x559e5da08cd0}}
> --Type <RET> for more, q to quit, c to continue without paging--c
>         receiver = 0x559e5dc0dfa0
>         td = <optimized out>
>         receiverInSameThread = <optimized out>
>         senderData = {previous = 0x0, receiver = 0x559e5dc0dfa0, sender = 0x559e602e4510, signal = 0}
>         c = 0x559e603bb680
>         connections = {d = {ptr = 0x559e5e0cc2a0}}
>         list = 0x559e604d15f0
>         inSenderThread = <optimized out>
>         highestConnectionId = 7
>         signalVector = 0x559e604d15d0
>         currentThreadId = 0x7ff1169e0dc0
>         sp = <optimized out>
>         signal_spy_set = 0x0
>         empty_argv = {0x0}
>         senderDeleted = false
> #8  0x00007ff11c95c089 in QMetaObject::activate (sender=sender@entry=0x0, m=m@entry=0x7ff11ce9dc80, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4206
>         signal_index = <optimized out>
> #9  0x00007ff11c95c147 in QMetaObject::activate<void, QObject*> (sender=0x0, mo=0x7ff11ce9dc80, local_signal_index=0, ret=0x0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs.h:306
>         _a = {0x0, 0x7ffcbf2b3198}
> #10 QObject::destroyed (this=this@entry=0x559e602e4510, _t1=<optimized out>, _t1@entry=0x559e602e4510) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/redhat-linux-build/src/corelib/kernel/moc_qobject.cpp:186
> No locals.
> #11 0x00007ff11c961c7e in QObject::~QObject (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1042
>         d = 0x559e5d8bf250
>         sharedRefcount = 0x0
>         cd = <optimized out>
>         d = <optimized out>
>         sharedRefcount = <optimized out>
>         cd = <optimized out>
>         ownThread = <optimized out>
>         privThread = <optimized out>
>         signalSlotMutex = <optimized out>
>         locker = <optimized out>
>         receiverCount = <optimized out>
>         signal = <optimized out>
>         connectionList = <optimized out>
>         c = <optimized out>
>         m = <optimized out>
>         needToUnlock = <optimized out>
>         node = <optimized out>
>         sender = <optimized out>
>         m = <optimized out>
>         needToUnlock = <optimized out>
>         senderData = <optimized out>
>         slotObj = <optimized out>
>         locksAreTheSame = <optimized out>
> #12 0x00007ff09c2bb775 in FlatpakResource::~FlatpakResource (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/backends/FlatpakBackend/FlatpakResource.h:29
> No locals.
> #13 0x00007ff11c95cda2 in QObjectPrivate::deleteChildren (this=this@entry=0x559e59fc8400) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:2223
>         i = 526
> #14 0x00007ff11c961cb4 in QObject::~QObject (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1140
>         d = <optimized out>
>         sharedRefcount = <optimized out>
>         cd = <optimized out>
>         d = <optimized out>
>         sharedRefcount = <optimized out>
>         cd = <optimized out>
>         ownThread = <optimized out>
>         privThread = <optimized out>
>         signalSlotMutex = <optimized out>
>         locker = <optimized out>
>         receiverCount = <optimized out>
>         signal = <optimized out>
>         connectionList = <optimized out>
>         c = <optimized out>
>         m = <optimized out>
>         needToUnlock = <optimized out>
>         node = <optimized out>
>         sender = <optimized out>
>         m = <optimized out>
>         needToUnlock = <optimized out>
>         senderData = <optimized out>
>         slotObj = <optimized out>
>         locksAreTheSame = <optimized out>
> #15 0x00007ff09c2c75c5 in FlatpakBackend::~FlatpakBackend (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/backends/FlatpakBackend/FlatpakBackend.cpp:341
> No locals.
> #16 0x00007ff11f74c6ee in qDeleteAll<QList<AbstractResourcesBackend*>::const_iterator> (begin=..., end=...) at /usr/include/qt6/QtCore/qalgorithms.h:27
> No locals.
> #17 qDeleteAll<QList<AbstractResourcesBackend*> > (c=...) at /usr/include/qt6/QtCore/qalgorithms.h:35
> No locals.
> #18 ResourcesModel::~ResourcesModel (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:125
> No locals.
> #19 0x00007ff11f74c7f5 in ResourcesModel::~ResourcesModel (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:126
> No locals.
> #20 0x00007ff11c95652c in QObject::event (this=<optimized out>, e=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1416
> No locals.
> #21 0x00007ff11ee3d97f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x559e59e4c9e0, e=0x559e6677dc70) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
>         consumed = false
>         filtered = false
>         threadData = <optimized out>
> #22 0x00007ff11c8f9f38 in QCoreApplication::notifyInternal2 (receiver=0x559e59e4c9e0, event=0x559e6677dc70) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
>         d = <optimized out>
>         threadData = 0x559e596a9070
>         selfRequired = <optimized out>
>         result = false
>         cbdata = {0x559e59e4c9e0, 0x559e6677dc70, 0x7ffcbf2b34ef}
>         scopeLevelCounter = {threadData = 0x559e596a9070}
> #23 0x00007ff11c8fa19d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1546
> No locals.
> #24 0x00007ff11c8fdd26 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x559e596a9070) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1879
>         e = 0x559e6677dc70
>         pe = <optimized out>
>         r = <optimized out>
>         relocker = <optimized out>
>         event_deleter = <optimized out>
>         locker = {_M_device = 0x559e596a90b8, _M_owns = false}
>         startOffset = 1
>         i = <optimized out>
>         cleanup = <optimized out>
> #25 0x00007ff11c8fe082 in QCoreApplicationPrivate::execCleanup (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1468
> No locals.
> #26 0x00007ff11c903436 in QCoreApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/tools/qscopedpointer.h:110
>         threadData = 0x559e596a9070
>         eventLoop = {<QObject> = {_vptr.QObject = 0x7ff11cea1c70 <vtable for QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7ff11cd1d7f0 <QObject::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN7QObjectE_t>+272>, 
>                 data = 0x7ff11cd1d6e0 <QObject::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN7QObjectE_t>>, static_metacall = 0x7ff11c9624c0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, 
>                 metaTypes = 0x7ff11cea3a60 <QObject::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN7QObjectE_t>>, extradata = 0x0}}, d_ptr = {d = 0x559e59e4e060}}, static staticMetaObject = {d = {superdata = {direct = 0x559e2fd086e0 <QObject::staticMetaObject>}, 
>               stringdata = 0x7ff11cd1ab0c <QEventLoop::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN10QEventLoopE_t>+236>, data = 0x7ff11cd1aa20 <QEventLoop::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN10QEventLoopE_t>>, 
>               static_metacall = 0x7ff11c9076e0 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7ff11cea1d20 <QEventLoop::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN10QEventLoopE_t>>, 
>               extradata = 0x0}}}
>         returnCode = 0
> #27 0x00007ff11d0ddbad in QGuiApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:1986
> No locals.
> #28 0x00007ff11ee3d8e9 in QApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:2570
> No locals.
> #29 0x0000559e2fca3c1a in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/discover/main.cpp:224
>         format = {d = 0x559e596a0460}
>         app = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x7ff11f5a1098 <vtable for QApplication+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, 
>                     stringdata = 0x7ff11cd1d7f0 <QObject::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN7QObjectE_t>+272>, data = 0x7ff11cd1d6e0 <QObject::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN7QObjectE_t>>, 
>                     static_metacall = 0x7ff11c9624c0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7ff11cea3a60 <QObject::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN7QObjectE_t>>, 
>                     extradata = 0x0}}, d_ptr = {d = 0x559e596ab7d0}}, static staticMetaObject = {d = {superdata = {direct = 0x559e2fd086e0 <QObject::staticMetaObject>}, 
>                   stringdata = 0x7ff11cd190e8 <QCoreApplication::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN16QCoreApplicationE_t>+392>, 
>                   data = 0x7ff11cd18f60 <QCoreApplication::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN16QCoreApplicationE_t>>, static_metacall = 0x7ff11c903c30 <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, 
>                   relatedMetaObjects = 0x0, metaTypes = 0x7ff11cea1980 <QCoreApplication::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN16QCoreApplicationE_t>>, extradata = 0x0}}, static self = 0x7ffcbf2b3790}, static staticMetaObject = {d = {superdata = {
>                   direct = 0x559e2fd08a00 <QCoreApplication::staticMetaObject>}, stringdata = 0x7ff11d8af910 <QGuiApplication::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN15QGuiApplicationE_t>+752>, 
>                 data = 0x7ff11d8af620 <QGuiApplication::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN15QGuiApplicationE_t>>, static_metacall = 0x7ff11d0dec70 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, 
>                 metaTypes = 0x7ff11d9ce640 <QGuiApplication::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN15QGuiApplicationE_t>>, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = {direct = 0x559e2fd08980 <QGuiApplication::staticMetaObject>}, 
>               stringdata = 0x7ff11f45c548 <QApplication::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN12QApplicationE_t>+392>, data = 0x7ff11f45c3c0 <QApplication::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN12QApplicationE_t>>, 
>               static_metacall = 0x7ff11ee43470 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7ff11f5a1160 <QApplication::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN12QApplicationE_t>>, 
>               extradata = 0x0}}}
>         about = {d = std::unique_ptr<KAboutDataPrivate> = {get() = 0x559e59e31330}}
>         discoverObject = <optimized out>
> ~~~
Comment 3 TraceyC 2025-06-17 19:26:05 UTC 
Thread 1 (Thread 0x7ff1169e0dc0 (LWP 70831)):
[KCrash Handler]
#5  0x00007ff11f74bde8 in AggregatedResultsStream::resourceDestruction (this=0x559e5dc0dfa0, obj=0x559e602e4510) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:356
#6  0x00007ff11c9657ba in QtPrivate::QSlotObjectBase::call (this=0x559e5da08cd0, r=0x559e5dc0dfa0, a=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs_impl.h:461
#7  doActivate<false> (sender=0x559e602e4510, signal_index=0, argv=argv@entry=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4146
#8  0x00007ff11c95c089 in QMetaObject::activate (sender=sender@entry=0x0, m=m@entry=0x7ff11ce9dc80, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffcbf2b31a0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:4206
#9  0x00007ff11c95c147 in QMetaObject::activate<void, QObject*> (sender=0x0, mo=0x7ff11ce9dc80, local_signal_index=0, ret=0x0) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobjectdefs.h:306
#10 QObject::destroyed (this=this@entry=0x559e602e4510, _t1=<optimized out>, _t1@entry=0x559e602e4510) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/redhat-linux-build/src/corelib/kernel/moc_qobject.cpp:186
#11 0x00007ff11c961c7e in QObject::~QObject (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1042
#12 0x00007ff09c2bb775 in FlatpakResource::~FlatpakResource (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/backends/FlatpakBackend/FlatpakResource.h:29
#13 0x00007ff11c95cda2 in QObjectPrivate::deleteChildren (this=this@entry=0x559e59fc8400) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:2223
#14 0x00007ff11c961cb4 in QObject::~QObject (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1140
#15 0x00007ff09c2c75c5 in FlatpakBackend::~FlatpakBackend (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/backends/FlatpakBackend/FlatpakBackend.cpp:341
#16 0x00007ff11f74c6ee in qDeleteAll<QList<AbstractResourcesBackend*>::const_iterator> (begin=..., end=...) at /usr/include/qt6/QtCore/qalgorithms.h:27
#17 qDeleteAll<QList<AbstractResourcesBackend*> > (c=...) at /usr/include/qt6/QtCore/qalgorithms.h:35
#18 ResourcesModel::~ResourcesModel (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:125
#19 0x00007ff11f74c7f5 in ResourcesModel::~ResourcesModel (this=<optimized out>, this=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/libdiscover/resources/ResourcesModel.cpp:126
#20 0x00007ff11c95652c in QObject::event (this=<optimized out>, e=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qobject.cpp:1416
#21 0x00007ff11ee3d97f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x559e59e4c9e0, e=0x559e6677dc70) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:3303
#22 0x00007ff11c8f9f38 in QCoreApplication::notifyInternal2 (receiver=0x559e59e4c9e0, event=0x559e6677dc70) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1106
#23 0x00007ff11c8fa19d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1546
#24 0x00007ff11c8fdd26 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=52, data=0x559e596a9070) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1879
#25 0x00007ff11c8fe082 in QCoreApplicationPrivate::execCleanup (this=<optimized out>) at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/kernel/qcoreapplication.cpp:1468
#26 0x00007ff11c903436 in QCoreApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/corelib/tools/qscopedpointer.h:110
#27 0x00007ff11d0ddbad in QGuiApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/gui/kernel/qguiapplication.cpp:1986
#28 0x00007ff11ee3d8e9 in QApplication::exec () at /usr/src/debug/qt6-qtbase-6.9.1-1.fc42.x86_64/src/widgets/kernel/qapplication.cpp:2570
#29 0x0000559e2fca3c1a in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/plasma-discover-6.3.5-1.fc42.x86_64/discover/main.cpp:224
Comment 4 TraceyC 2025-09-16 00:37:25 UTC 
*** Bug 509336 has been marked as a duplicate of this bug. ***
Comment 5 TraceyC 2025-10-10 18:50:53 UTC 
I just found that this appears to be the same bactrace as bug 504841. The only difference is the backend. I'm merging this in with the older report. Thanks!

*** This bug has been marked as a duplicate of bug 504841 ***