Comment 11 for bug 1620407

Yep, the bisect hit the change that I assumed 9c17d665fdc5f "autocreate tap device for ethernet network type".

The upstream "fix" now known and understood I agree way more with your fix now. To backport the upstream version is much more of a feature and large scale impact than the fix you provided.

I'm planning to include that in the next Xenial SRU I'm doing for libvirt after I had the chance to give it some extra tests to confirm there is no unexpected side-effect.