"Checksum error!" when starting advent
advent says "Checksum error!" whenever it starts, except when adventure.data doesn't exist. If it does exist, advent gives the error message, then proceeds to rebuild adventure.data. Subsequent advent runs still throw the error, and rebuild adventure.data again, etc. Removing adventure.data prevents the error the first time it's run after removal.
This was observed on Fedora 24 x86_64.