When installing plocate together with incus, which might use /var/lib/incus as storage backend, plocate might start looking into all the files in the container file system, which would cause noise in the locate database (and potentially create a very large database). This could simply be achieved by appending /var/lib/incus to PRUNEPATHS.
Hi, plocate cannot add PRUNEPATHS for everything that someone might want to exclude; if it's a separate file system type, we could probably consider it, but as it stands, I'm going to close this as wontfix. Even more so since for every exclusion I have, I tend to get complaints why plocate doesn't find stuff in there :-) /* Steinar */