v7 was:
https://www.redhat.com/archives/libguestfs/2017-June/msg00169.html
https://www.redhat.com/archives/libguestfs/2017-June/msg00184.html
I believe this addresses all comments received so far.
Also it now passes a test where I compared about 100 disk images
processed with old and new virt-inspector binaries. The output is
identical in all cases except one which is caused by a bug in blkid
(
https://bugzilla.redhat.com/show_bug.cgi?id=1463615).
Rich.