This same issue was tracked already in Ubuntu Launchpad, I added a link to this bug over there: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1416793?comments=all
This same issue was tracked already in Ubuntu Launchpad, I added a link to this bug over there: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1416793?comments=all