If Ubuntu released a new version and distro-info-data was not updated with a new development version, distro_info.UbuntuDistroInfo().devel() will throw DistroDataOutdated. When testing with test_upload.py, this results in a broken unit test, cause distro_info.py uses the current date, as shown in #927467. As we want to remove the development version from the supported list anyhow, we can just ignore the error.