A recent change made `graphdriver.NaiveDiffDriver` from a function to a struct. New function is `graphdriver.NewNaiveDiffDriver. The graphdriver plugin PR was created (and tests run) before this change was introduced causing the failure to not be seen until after merge. Signed-off-by: Brian Goff <cpuguy83@gmail.com> Upstream-commit: a705ca017349b9d4c71e22de795e7dda40a5ecce Component: engine