(In reply to ihasdapi from comment #0)
> Please find coredump here:
> https://raw.githubusercontent.com/ihasdapie/plasma_bug_report/main/
> plasmashellreplace.txt
There doesn't seem to be any content here. Can you attach the backtrace please?

(In reply to Nate Graham from comment #1)
> (In reply to ihasdapi from comment #0)
> > Please find coredump here:
> > https://raw.githubusercontent.com/ihasdapie/plasma_bug_report/main/
> > plasmashellreplace.txt
> There doesn't seem to be any content here. Can you attach the backtrace
> please?

My bad, I had attached the wrong link in my report.

https://raw.githubusercontent.com/ihasdapie/plasma_bug_report/main/journaldlog.txt

https://raw.githubusercontent.com/ihasdapie/plasma_bug_report/main/journaldlog.txt

includes coredump for kstart5 & other processes that failed alongside plasmashell

Hmm, unfortunately that's not very useful because you're using an Arch-based distro. Could you build/install with debug symbols and get a new one?

(In reply to Nate Graham from comment #4)
> Hmm, unfortunately that's not very useful because you're using an Arch-based
> distro. Could you build/install with debug symbols and get a new one?

I've rolled back to a previous system backup. Currently need my system for work, will update this thread if I can get more info/the issue comes up again.

This is the infamous event calendar crash with Qt 5.15.1. Update your event calendar applet first and then update your system.

(In reply to Antonio Rojas from comment #6)
> This is the infamous event calendar crash with Qt 5.15.1. Update your event
> calendar applet first and then update your system.

I don't have the event calendar applet installed on my system...

Then there must be some other applet triggering the same crash. Please post your plasma-org.kde.plasma.desktop-appletsrc

(In reply to Antonio Rojas from comment #8)
> Then there must be some other applet triggering the same crash. Please post
> your plasma-org.kde.plasma.desktop-appletsrc


[ActionPlugins][0]
MidButton;NoModifier=org.kde.paste
RightButton;NoModifier=org.kde.contextmenu
wheel:Vertical;NoModifier=org.kde.switchdesktop

[ActionPlugins][1]
MidButton;NoModifier=org.kde.paste
RightButton;NoModifier=org.kde.contextmenu

[AppletGlobals][org.kde.plasma.comic]
lastUpdate=2020,8,17,21,20,23
updateInterval=17

[Containments][107]
activityId=de2754b3-5aa1-4049-ac0c-5e19adbe0525
formfactor=0
immutability=1
lastScreen=1
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image

[Containments][107][Configuration]
PreloadWeight=26

[Containments][112]
ItemGeometriesHorizontal=Applet-123:1248,128,480,192,0;Applet-133:1760,512,160,160,0;Applet-100:2368,96,608,800,0;
activityId=de2754b3-5aa1-4049-ac0c-5e19adbe0525
formfactor=0
immutability=1
lastScreen=0
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image

[Containments][112][Applets][100]
immutability=1
plugin=org.kde.plasma.weather

[Containments][112][Applets][100][Configuration]
PreloadWeight=18
pressureUnit=5007
showHumidityInTooltip=true
showPressureInTooltip=true
showTemperatureInCompactMode=false
showTemperatureInTooltip=true
showWindInTooltip=true
source=bbcukmet|weather|Vancouver, Canada|6173331
speedUnit=9001
temperatureUnit=6001
updateInterval=60
visibilityUnit=2007
weatherServiceProviders=bbcukmet

[Containments][112][Applets][100][Configuration][ConfigDialog]
DialogHeight=1140
DialogWidth=1520

[Containments][112][Applets][123]
immutability=1
plugin=org.kde.plasma.digitalclock

[Containments][112][Applets][123][Configuration]
PreloadWeight=47

[Containments][112][Applets][123][Configuration][Appearance]
displayTimezoneAsCode=false
enabledCalendarPlugins=/usr/lib/qt/plugins/plasmacalendarplugins/astronomicalevents.so,/usr/lib/qt/plugins/plasmacalendarplugins/holidaysevents.so
showWeekNumbers=true

[Containments][112][Applets][123][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][112][Applets][133]
immutability=1
plugin=org.kde.plasma.quickshare

[Containments][112][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][112][Configuration]
PreloadWeight=0

[Containments][112][General]
ToolBoxButtonState=topcenter
ToolBoxButtonX=1090
positions=4,14,desktop:/timeshift-gtk.desktop,2,4,desktop:/mailspring.desktop,2,5,desktop:/org.kde.dolphin.desktop,2,6,desktop:/org.kde.ksysguard.desktop,2,7,desktop:/brave-browser.desktop,2,1,desktop:/kitty.desktop,2,2,desktop:/org.kde.spectacle.desktop,2,3,desktop:/Projects,3,1
sortMode=-1

[Containments][112][Wallpaper][org.kde.image][General]
Image=file:///home/ihasdapie/Pictures/Wallpaper/rainbow_wavey.jpg

[Containments][112][Wallpaper][org.kde.potd][General]
FillMode=2
Provider=bing

[Containments][127]
activityId=de2754b3-5aa1-4049-ac0c-5e19adbe0525
formfactor=0
immutability=1
lastScreen=2
location=0
plugin=org.kde.plasma.folder
wallpaperplugin=org.kde.image

[Containments][127][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][127][Configuration]
PreloadWeight=42

[Containments][127][General]
ToolBoxButtonState=topcenter
ToolBoxButtonX=550

[Containments][138]
activityId=
formfactor=2
immutability=1
lastScreen=0
location=4
plugin=org.kde.panel
wallpaperplugin=org.kde.image

[Containments][138][Applets][139]
immutability=1
plugin=org.kde.plasma.kickoff

[Containments][138][Applets][139][Configuration]
PreloadWeight=100

[Containments][138][Applets][139][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][138][Applets][139][Configuration][General]
favoritesPortedToKAstats=true
menuItems=oftenUsed:t,application:t,computer:t,used:t,leave:t,bookmark:f
systemApplications=systemsettings.desktop,org.kde.kinfocenter.desktop

[Containments][138][Applets][139][Configuration][Shortcuts]
global=Alt+F1

[Containments][138][Applets][139][Shortcuts]
global=Meta+F1

[Containments][138][Applets][140]
immutability=1
plugin=org.kde.plasma.pager

[Containments][138][Applets][140][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][138][Applets][140][Configuration][General]
showWindowIcons=true

[Containments][138][Applets][141]
immutability=1
plugin=org.kde.plasma.icontasks

[Containments][138][Applets][141][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][138][Applets][141][Configuration][General]
launchers=applications:brave-browser.desktop,applications:kitty.desktop,applications:org.kde.dolphin.desktop,applications:caprine.desktop,applications:mailspring.desktop

[Containments][138][Applets][143]
immutability=1
plugin=org.kde.plasma.systemtray

[Containments][138][Applets][143][Configuration]
PreloadWeight=100
SystrayContainmentId=144

[Containments][138][Applets][153]
immutability=1
plugin=org.kde.plasma.digitalclock

[Containments][138][Applets][153][Configuration]
PreloadWeight=100

[Containments][138][Applets][153][Configuration][Appearance]
dateFormat=isoDate
showDate=true

[Containments][138][Applets][153][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][138][Applets][159]
immutability=1
plugin=org.kde.plasma_applet_dict

[Containments][138][Applets][159][Configuration]
PreloadWeight=65

[Containments][138][Applets][160]
immutability=1
plugin=gr.ictpro.jsalatas.plasma.pstate

[Containments][138][Applets][160][Configuration]
PreloadWeight=100

[Containments][138][Applets][161]
immutability=1
plugin=org.kde.plasma.notes

[Containments][138][Applets][161][Configuration]
PreloadWeight=75

[Containments][138][Applets][161][Configuration][General]
noteId=9c2e10f2-6566-4560-9e94-a09ab2ef23

[Containments][138][ConfigDialog]
DialogHeight=142
DialogWidth=3000

[Containments][138][General]
AppletOrder=139;159;160;161;141;140;143;153

[Containments][144]
activityId=
formfactor=2
immutability=1
lastScreen=0
location=4
plugin=org.kde.plasma.private.systemtray
wallpaperplugin=org.kde.image

[Containments][144][Applets][145]
immutability=1
plugin=org.kde.plasma.volume

[Containments][144][Applets][145][Configuration]
PreloadWeight=100

[Containments][144][Applets][145][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][144][Applets][145][Configuration][General]
raiseMaximumVolume=true

[Containments][144][Applets][146]
immutability=1
plugin=org.kde.plasma.clipboard

[Containments][144][Applets][146][Configuration]
PreloadWeight=85

[Containments][144][Applets][147]
immutability=1
plugin=org.kde.plasma.devicenotifier

[Containments][144][Applets][147][Configuration]
PreloadWeight=100

[Containments][144][Applets][148]
immutability=1
plugin=org.kde.kdeconnect

[Containments][144][Applets][148][Configuration]
PreloadWeight=100

[Containments][144][Applets][149]
immutability=1
plugin=org.kde.plasma.keyboardindicator

[Containments][144][Applets][149][Configuration]
PreloadWeight=55

[Containments][144][Applets][150]
immutability=1
plugin=org.kde.plasma.nightcolorcontrol

[Containments][144][Applets][151]
immutability=1
plugin=org.kde.plasma.notifications

[Containments][144][Applets][151][Configuration]
PreloadWeight=100

[Containments][144][Applets][152]
immutability=1
plugin=org.kde.plasma.printmanager

[Containments][144][Applets][154]
immutability=1
plugin=org.kde.plasma.mediacontroller

[Containments][144][Applets][154][Configuration]
PreloadWeight=0

[Containments][144][Applets][155]
immutability=1
plugin=org.kde.plasma.battery

[Containments][144][Applets][155][Configuration]
PreloadWeight=100

[Containments][144][Applets][155][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][144][Applets][156]
immutability=1
plugin=org.kde.plasma.networkmanagement

[Containments][144][Applets][156][Configuration]
PreloadWeight=95

[Containments][144][Applets][157]
immutability=1
plugin=org.kde.plasma.bluetooth

[Containments][144][Applets][157][Configuration]
PreloadWeight=65

[Containments][144][Applets][158]
immutability=1
plugin=org.kde.kscreen

[Containments][144][Applets][162]
immutability=1
plugin=touchpad

[Containments][144][Applets][162][Configuration][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][144][ConfigDialog]
DialogHeight=1020
DialogWidth=1360

[Containments][144][General]
extraItems=org.kde.plasma.networkmanagement,org.kde.plasma.keyboardindicator,org.kde.plasma.clipboard,org.kde.kdeconnect,org.kde.plasma.printmanager,org.kde.plasma.notifications,org.kde.plasma.nightcolorcontrol,touchpad,org.kde.plasma.mediacontroller,org.kde.plasma.devicenotifier,matebook-applet,Your system is up-to-date,org.kde.plasma.battery,Update Manager,org.kde.plasma.bluetooth,org.kde.plasma.volume,org.kde.kscreen
hiddenItems=touchpad,Your system is up-to-date,org.kde.plasma.nightcolorcontrol,Update Manager
knownItems=org.kde.plasma.mediacontroller,org.kde.plasma.networkmanagement,org.kde.plasma.keyboardindicator,org.kde.plasma.volume,org.kde.plasma.battery,org.kde.plasma.clipboard,org.kde.plasma.bluetooth,org.kde.kdeconnect,org.kde.plasma.printmanager,org.kde.plasma.devicenotifier,org.kde.plasma.notifications,org.kde.plasma.nightcolorcontrol
shownItems=org.kde.plasma.battery,org.kde.plasma.volume

[Containments1Appletsts][116][Configuration][General]
launchers=applications:mailspring.desktop,applications:kitty.desktop,applications:brave-browser.desktop,applications:org.kde.dolphin.desktop

[Containments1Appletsts][135][Configuration][General]
expanding=false
length=37

[ScreenMapping]
itemsOnDisabledScreens=
screenMapping=desktop:/timeshift-gtk.desktop,0,desktop:/Projects,0,desktop:/brave-browser.desktop,0,desktop:/mailspring.desktop,0,file:///home/ihasdapie/Desktop/Projects,0,file:///home/ihasdapie/Desktop/Link to Application.desktop,0,desktop:/org.kde.spectacle.desktop,0,desktop:/kitty.desktop,0,desktop:/org.kde.ksysguard.desktop,0,desktop:/org.kde.dolphin.desktop,0

The only thing that stands out there is the pstate applet, you may want to try removing it. Otherwise, start with a clean config and add the applets one by one until you find out which one is the culprit

FYI: plasma-pstate is also being reported to crash the plasmashell with qt 5.15.1. :\

*** Bug 427884 has been marked as a duplicate of this bug. ***

Is there a Qt bug report on this?

(In reply to Nate Graham from comment #13)
> Is there a Qt bug report on this?

Yes this one. 

https://bugreports.qt.io/browse/QTBUG-87189

*** Bug 429029 has been marked as a duplicate of this bug. ***

*** Bug 428444 has been marked as a duplicate of this bug. ***

Problem has been resolved by removing plasma p-state plasmoid & running a system update! Reinstalled p-state & event calendar and it has been stable since.

(In reply to ihasdapi from comment #17)
> Problem has been resolved by removing plasma p-state plasmoid & running a
> system update! Reinstalled p-state & event calendar and it has been stable
> since.

Umm.... are you still on qt 5.15.1?

(In reply to John Salatas from comment #18)
> (In reply to ihasdapi from comment #17)
> > Problem has been resolved by removing plasma p-state plasmoid & running a
> > system update! Reinstalled p-state & event calendar and it has been stable
> > since.
> 
> Umm.... are you still on qt 5.15.1?

Oh I was able to fix the problem a little while back and since forgot to update this thread until I got an email notification for this thread today.

(In reply to ihasdapi from comment #19)
> (In reply to John Salatas from comment #18)
> > (In reply to ihasdapi from comment #17)
> > > Problem has been resolved by removing plasma p-state plasmoid & running a
> > > system update! Reinstalled p-state & event calendar and it has been stable
> > > since.
> > 
> > Umm.... are you still on qt 5.15.1?
> 
> Oh I was able to fix the problem a little while back and since forgot to
> update this thread until I got an email notification for this thread today.


OK! Could you please let me know if you are still using the unpatched plasma-pstate widget and if you are in qt 5.15.1? :)

(In reply to John Salatas from comment #20)
> (In reply to ihasdapi from comment #19)
> > (In reply to John Salatas from comment #18)
> > > (In reply to ihasdapi from comment #17)
> > > > Problem has been resolved by removing plasma p-state plasmoid & running a
> > > > system update! Reinstalled p-state & event calendar and it has been stable
> > > > since.
> > > 
> > > Umm.... are you still on qt 5.15.1?
> > 
> > Oh I was able to fix the problem a little while back and since forgot to
> > update this thread until I got an email notification for this thread today.
> 
> 
> OK! Could you please let me know if you are still using the unpatched
> plasma-pstate widget and if you are in qt 5.15.1? :)

Oh, right, misinterpreted you. I'm on qt 5.15.1 & I installed the patched widget.