[sudo-users] #includedir gives parse error

[Todd C. Miller]

Do you get anything useful from either:

    # visudo -c -f /etc/sudoers
    # visudo -c -f /etc/sudoers.d/repo.conf

Sudo will fail to parse an empty includedir, which is a bug but
doesn't seem to be what you are hitting.  I don't see a problem
here as long as the dir exists and has at least one file in it.

 - todd