Comment 5 for bug 1945874

Didier,

That part didn't strike me as exceptional because the pool's already
mounted, since we're running update-grub from the running system. It's
not available to be listed or imported again.

I'll want to read 10_linux_zfs in depth to see what it's doing, but if
it's depending on a list to come back from 'zpool import' it's not
going to get one in circumstances where the pool's already imported,
unless there's some critical concept confusing me.