SUMMARY

When clicking on the clean clipboard history button, plasmashell crashes.
I am not sure why but I think it has something to do with having clipboard history, then rebuilding plasmashell (or just restarting PC) and then trying to clear it.

STEPS TO REPRODUCE
1. Add a lot of text and images (like with spectacle) to your clipboard
2. Restart PC and/or rebuild plasma dev session
3. Log in and try to clean clipboard

OBSERVED RESULT
Plasmashell goes crash

EXPECTED RESULT
No crash!

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.80
KDE Frameworks Version: 6.4.0
Qt Version: 6.7.1
Kernel Version: 6.9.7-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 15.5 GiB of RAM
Graphics Processor: AMD Radeon RX 6600

ADDITIONAL INFORMATION
Here's a backtrace:

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 0x7fc7703adb80 (LWP 6748))]
Missing separate debuginfos, use: dnf debuginfo-install ffmpeg-libs-6.1.1-11.fc40.x86_64 x264-libs-0.164-13.20231001git31e19f92.fc40.x86_64 x265-libs-3.6-2.fc40.x86_64
(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0)
at pthread_kill.c:44
#1  0x00007fc7756ab1b3 in __pthread_kill_internal (threadid=<optimized out>, signo=11) at pthread_kill.c:78
#2  0x00007fc77565365e in __GI_raise (sig=11) at ../sysdeps/posix/raise.c:26
#3  0x00007fc77940e9eb in KCrash::defaultCrashHandler (sig=11)
at /home/akseli/Repositories/kde/src/kcrash/src/kcrash.cpp:597
#4  0x00007fc775653710 in <signal handler called> () at /lib64/libc.so.6
#5  0x000000000f3230e0 in ??? ()
#6  0x00007fc7118861fe in operator<< (lhs=..., rhs=0x10fd26d0)
at /home/akseli/Repositories/kde/src/plasma-workspace/klipper/historyitem.h:116
#7  HistoryModel::saveHistory (this=0x10fd4560, empty=empty@entry=false)
at /home/akseli/Repositories/kde/src/plasma-workspace/klipper/historymodel.cpp:296
#8  0x00007fc71186beb1 in Klipper::slotAskClearHistory (this=this@entry=0x10fba9e0)
at /home/akseli/Repositories/kde/src/plasma-workspace/klipper/klipper.cpp:687
#9  0x00007fc711866329 in ClipboardJob::start (this=0x1548eb70)
at /home/akseli/Repositories/kde/src/plasma-workspace/klipper/clipboardjob.cpp:36
#10 0x00007fc775debdeb in QObject::event (this=0x1548eb70, e=0x156e96c0)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qobject.cpp:1452
#11 0x00007fc77878b168 in QApplicationPrivate::notify_helper
(this=<optimized out>, receiver=0x1548eb70, e=0x156e96c0)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/widgets/kernel/qapplication.cpp:3287
#12 0x00007fc775d95b18 in QCoreApplication::notifyInternal2 (receiver=0x1548eb70, event=0x156e96c0)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1134
#13 0x00007fc775d95d7d in QCoreApplication::sendEvent (receiver=<optimized out>, event=<optimized out>)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1575
#14 0x00007fc775d998c1 in QCoreApplicationPrivate::sendPostedEvents
(receiver=0x0, event_type=0, data=0xf3230e0)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1932
#15 0x00007fc775d99b6d in QCoreApplication::sendPostedEvents
(receiver=<optimized out>, event_type=<optimized out>)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qcoreapplication.cpp:1789
#16 0x00007fc77607d39f in postEventSourceDispatch (s=0xf411c90)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:244
#17 0x00007fc77526de8c in g_main_dispatch (context=0x7fc75c000f00) at ../glib/gmain.c:3344
--Type <RET> for more, q to quit, c to continue without paging--c
#18 g_main_context_dispatch_unlocked (context=0x7fc75c000f00) at ../glib/gmain.c:4152
#19 0x00007fc7752cfc98 in g_main_context_iterate_unlocked.isra.0
(context=context@entry=0x7fc75c000f00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at ../glib/gmain.c:4217
#20 0x00007fc77526f383 in g_main_context_iteration (context=0x7fc75c000f00, may_block=1)
at ../glib/gmain.c:4282
#21 0x00007fc77607cb53 in QEventDispatcherGlib::processEvents (this=0xf328e30, flags=...)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/kernel/qeventdispatcher_glib.cpp:394
#22 0x00007fc775da2713 in QEventLoop::exec (this=this@entry=0x7fff50d534f0, flags=..., flags@entry=...)
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/global/qflags.h:34
#23 0x00007fc775d9e69c in QCoreApplication::exec ()
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/corelib/global/qflags.h:74
#24 0x00007fc7767d53dd in QGuiApplication::exec ()
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/gui/kernel/qguiapplication.cpp:1926
#25 0x00007fc77878b0d9 in QApplication::exec ()
at /usr/src/debug/qt6-qtbase-6.7.1-2.fc40.x86_64/src/widgets/kernel/qapplication.cpp:2555
#26 0x0000000000427a86 in main (argc=<optimized out>, argv=<optimized out>)
at /home/akseli/Repositories/kde/src/plasma-workspace/shell/main.cpp:188