Comment 7 for bug 748340

I have confirmed with upstream that deleting a subvolume which has subsequent snapshots IS supported

However, I was not able to reproduce this by some brief mucking about with snapshots in a new kvm install.
(Replacing @/ with a snapshot and deleting the old (original) @/-subvolume.)

So presumably this does not (exclusively?) relate to deleting snapshotted subvolumes.