Comment 7 for bug 1935617

The service has a StartPre that is like
  ExecStartPre=rm -f /failed /testok

And that works to reproduce:

bash-5.1# rm -f /failed /testok
Segmentation fault (core dumped)

In fact this RM is very very sad:
-bash-5.1# rm /doesnotexist
Segmentation fault (core dumped)
-bash-5.1# touch /doesexist
-bash-5.1# rm /doesexist
Segmentation fault (core dumped)
-bash-5.1# rm -f /doesexist
Segmentation fault (core dumped)

Other commands (as far as I can see) work as usual albeit with the restrictions of an emulated HVC console.

There is no ssh installed and no apt, so getting this into a better debuggable state isn't easy.