The problem is ldirectord's systemd service script; it tries to touch /var/lock/subsys/ldirectord but it appears /var/lock/subsys dir doesn't exist. I believe /var/lock/subsys is a sysv service thing, and isn't needed with systemd, but i only briefly investigated.
Most likely the service file should just have its touch/rm removed. If there is a reason to touch/remove the /var/lock/subsys lockfile, the service needs to mkdir /var/lock/subsys first or at least ignore touch errors.
This could potentially actually break ldirectord package installation or upgrade, so I think it's more serious than just a failing autopkgtest.
The problem is ldirectord's systemd service script; it tries to touch /var/lock/ subsys/ ldirectord but it appears /var/lock/subsys dir doesn't exist. I believe /var/lock/subsys is a sysv service thing, and isn't needed with systemd, but i only briefly investigated.
Most likely the service file should just have its touch/rm removed. If there is a reason to touch/remove the /var/lock/subsys lockfile, the service needs to mkdir /var/lock/subsys first or at least ignore touch errors.
This could potentially actually break ldirectord package installation or upgrade, so I think it's more serious than just a failing autopkgtest.