Comment 4 for bug 653320

Guys, how do you develop? I'm trying to checkout ifupdown and it fails:

bzr branch lp:ubuntu/vivid/ifupdown
The authenticity of host 'bazaar.launchpad.net (91.189.95.84)' can't be established.
RSA key fingerprint is SHA256:dS2DmMhdbMsWaFP4HOF7A/ut73ozMR/gDL2Xxs01/7A.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'bazaar.launchpad.net,91.189.95.84' (RSA) to the list of known hosts.
bzr: ERROR: Revision {<email address hidden>} not present in "Graph(StackedParentsProvider(bzrlib.repository._LazyListJoin(([CachingParentsProvider(None)], []))))".

http://package-import.ubuntu.com/status/ifupdown.html