Created attachment 136795 [details]
journalctl -b --no-host -o short-precise.txt

SUMMARY
Silent almost not visible crash. Blue blurred line of about 50 px wide was displayed over the bottom panel of the screen. Re-edit the panel from always visible to auto-hide and than back removes that blue blurred line.


STEPS TO REPRODUCE
1. Edit visibility of bottom panel: auto-hide to always visible and back and at some point got crash.

OBSERVED RESULT
invisible crash (present in journalctl)

EXPECTED RESULT
journalctl free of crash

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux
KDE Plasma Version: 5.21.3
KDE Frameworks Version: 5.80.0
Qt Version: 5.15.2
Kernel Version: 5.12.0-1-MANJARO
OS Type: 64-bit
Graphics Platform: X11
Processors: 4 × Intel® Core™ i5-8259U CPU @ 2.30GHz
Memory: 31.2 GiB of RAM
Graphics Processor: Mesa Intel® Iris® Plus Graphics 655

ADDITIONAL INFORMATION

Core dumped:

```
$ gdb /usr/bin/plasmashell core.plasmashell.1000.2a432adc973e4c8f899593a9f19064d3.825.1615999771000000
...
[New LWP 6661]
[New LWP 10097]
[New LWP 20507]
Warning: couldn't activate thread debugging using libthread_db: Cannot find new threads: generic error
Warning: couldn't activate thread debugging using libthread_db: Cannot find new threads: generic error

warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
--Type <RET> for more, q to quit, c to continue without paging--
Core was generated by `/usr/bin/plasmashell'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00007f5f6177def5 in raise () from /usr/lib/libc.so.6
[Current thread is 1 (Thread 0x7f5f5d1bc280 (LWP 825))]
(gdb) bt
#0  0x00007f5f6177def5 in raise () at /usr/lib/libc.so.6
#1  0x00007f5f6177df80 in <signal handler called> () at /usr/lib/libc.so.6
#2  0x00007f5f618a5566 in __memmove_avx_unaligned_erms () at /usr/lib/libc.so.6
#3  0x00007f5f621cb917 in QImage::copy(QRect const&) const () at /usr/lib/libQt5Gui.so.5
#4  0x00007f5f61410582 in  () at /usr/lib/libKF5KIOWidgets.so.5
#5  0x00007f5f61dd9d86 in  () at /usr/lib/libQt5Core.so.5
#6  0x00007f5f5f954845 in KIO::TransferJob::data(KIO::Job*, QByteArray const&) () at /usr/lib/libKF5KIOCore.so.5
#7  0x00007f5f61dd9d86 in  () at /usr/lib/libQt5Core.so.5
#8  0x00007f5f5f930ad3 in KIO::SlaveInterface::data(QByteArray const&) () at /usr/lib/libKF5KIOCore.so.5
#9  0x00007f5f5f932f8d in KIO::SlaveInterface::dispatch(int, QByteArray const&) () at /usr/lib/libKF5KIOCore.so.5
#10 0x00007f5f5f93129a in KIO::SlaveInterface::dispatch() () at /usr/lib/libKF5KIOCore.so.5
#11 0x00007f5f5f934d9b in KIO::Slave::gotInput() () at /usr/lib/libKF5KIOCore.so.5
#12 0x00007f5f61dd9d86 in  () at /usr/lib/libQt5Core.so.5
#13 0x00007f5f61dcf532 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f5f62a41752 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007f5f61da2a2a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#16 0x00007f5f61da5523 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#17 0x00007f5f61dfc054 in  () at /usr/lib/libQt5Core.so.5
#18 0x00007f5f60187b84 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#19 0x00007f5f601dbc21 in  () at /usr/lib/libglib-2.0.so.0
#20 0x00007f5f601863b1 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#21 0x00007f5f61dfb691 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#22 0x00007f5f61da13ac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#23 0x00007f5f61da9844 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#24 0x0000563b70b3320b in  ()
#25 0x00007f5f61768b25 in __libc_start_main () at /usr/lib/libc.so.6
#26 0x0000563b70b3333e in  ()
(gdb) 

```