Comment # 3 on bug 1206237 from James Fehlig

(In reply to Dominique Leuenberger from comment #2)
> Last successful run was
> https://openqa.opensuse.org/tests/2934162#step/nested_vm/42 (yesterday)
> 
> we can see the warning about no os detected there too.
> 
> but I just see that this is even weirder
> 
> The test actually does:
> * Boot a Leap 15.2 disk image <-- I missed that before
> * Installs libvirtd (plus deps)
> * Calls those virt-install/virt-list commands

Ah, that explains why the virt-install command succeeds with only the warning.
On TW the same command will now fail.

> Now, I have to admit I have no clue (yet) why the first one inside a (not
> modified, and hopefully no updates published) 15.2 image would start to fail.

Agree that is very odd and inexplicable :-).