Comment 5 for bug 653312

listen, oprofile, python-bsddb3 and vim are all still failing with this error.

A brief investigation leaves me confused: DistributionBranch.upstream_parents calls get_parents and extracts a pull_branch and pull_version from the list of results. It then fails to fetch the revision_id for pull_version.upstream_version from pull_branch. So either upstream_parents is wrong in assuming that it should be able to do that fetch, or get_parents is wrong for returning a pull_branch and pull_version where the revision for the upstream_version isn't available. I don't know the code well enough to say which is the case.