lubuntu mantic install; picom crashed too many times at login

[Chris Guiver]

lubuntu mantic re-install on
- dell [optiplex] 780 (c2q-q9400, 8gb, amd/ati cedar radeon hd 5000/6000/7350/8350)
testcase: install using existing partition

this maybe related to https://bugs.launchpad.net/ubuntu/+source/picom/+bug/2018620

I'm seeing this still on my my primary box, plus on some INSTALL USING EXISTING PARTITION installs... where the HOME DIRECTORY is RE-USED... could a setting remain on re-install that causes this issue?

** Expected result

on fresh install; no first pop-up telling me something has crashed too many times

** Actual result

on login, wallpaper is drawn then a pop-up reporting PICOM HAS CRASHED TOO MANY TIMES

ProblemType: Crash
DistroRelease: Ubuntu 23.10
Package: picom 10.2-1
Uname: Linux 6.3.0-7-generic x86_64
Architecture: amd64
CurrentDesktop: LXQt
Date: Thu Aug 24 18:50:52 2023
ExecutablePath: /usr/bin/picom
ExecutableTimestamp: 1679233319
ProcCmdline: /usr/bin/picom
ProcCwd: /home/guiverc
Signal: 6
SourcePackage: picom
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 __assert_fail_base (fmt=0x7f5a1b9b9f68 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x5581de61c013 "false", file=file@entry=0x5581de61c004 "../src/picom.c", line=line@entry=425, function=function@entry=0x5581de61de00 <__PRETTY_FUNCTION__.24> "destroy_backend") at ./assert/assert.c:92
 __assert_fail (assertion=assertion@entry=0x5581de61c013 "false", file=file@entry=0x5581de61c004 "../src/picom.c", line=line@entry=425, function=function@entry=0x5581de61de00 <__PRETTY_FUNCTION__.24> "destroy_backend") at ./assert/assert.c:101
 destroy_backend (ps=ps@entry=0x5581df645d00) at ../src/picom.c:425
 configure_root (ps=0x5581df645d00) at ../src/picom.c:602
 handle_root_flags (ps=0x5581df645d00) at ../src/picom.c:665

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
https://iso.qa.ubuntu.com/qatracker/reports/bugs/2032909