Application: plasmashell (5.18.5)

Qt Version: 5.12.8
Frameworks Version: 5.68.0
Operating System: Linux 5.4.0-60-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:
I don't remember exactly. I was either doing something in terminal or I was switching between terminal (Terminator) and MS Teams window.
I was moving files from NTFS part on one drive to NTFS part on the other one using mc in the background. And I think I was installing something using "apt install". I don't believe it may be related.
Here are commands I issued in zsh right before crash (which happened at 15:43:30, please see short crash info msg at the bottom):
2021-01-14 15:43:01  time git fsck && time git gc --prune=now
2021-01-14 15:45:30  Sync() ( GetDirtySize && time sync && GetDirtySize ; ) && GetDirtySize() ( set -uC && set -o pipefail && cat /proc/meminfo | grep -e '^Dirty:' -e '^Writeback:' ; ) && Sync
Seems "sync" command triggered something which caused the crash. I am wondering if it is possible that some GPU hardware or firmware bug can be the reason. I have constant crashes (can be few times a day) in windows on this PC.

- Custom settings of the application:
Apart from default widgets I have these:
 - CPU Load Monitor
 - Hard Disk I/O Monitor
 - Network Monitor
 - System Load Viewer

Short crash report msg:
Executable: plasmashell PID: 1417 Signal: Segmentation fault (11) Time: 14.01.21 15:43:30

-- Backtrace (Reduced):
#6  0x00007f475d5b9692 in QQmlData::wasDeleted (object=0x557cae03f680) at ../../include/QtQml/5.12.8/QtQml/private/../../../../../src/qml/qml/qqmldata_p.h:338
#7  QV4::QObjectWrapper::wrap (engine=0x557cac612f00, object=0x557cae03f680) at ../../include/QtQml/5.12.8/QtQml/private/../../../../../src/qml/jsruntime/qv4qobjectwrapper_p.h:215
#8  0x00007f475d663138 in QV4::ExecutionEngine::fromVariant (this=0x557cac612f00, variant=...) at jsruntime/qv4engine.cpp:1517
#9  0x00007f475d5dbee7 in loadProperty(QV4::ExecutionEngine*, QObject*, QQmlPropertyData const&) () at jsruntime/qv4qobjectwrapper.cpp:207
#10 0x00007f475d5fc347 in QV4::Moth::VME::interpret (frame=0x7ffcd6d12b00, engine=0x557cac612f00, code=0x7f473958d5f9 ":#nL\030.$\030\a.%\030\b\024") at jsruntime/qv4vme_moth.cpp:621


Possible duplicates by query: bug 430909, bug 426905, bug 425987, bug 425576, bug 425068.

Reported using DrKonqi