systemd 208-4 in Fedora 20.
# journalctl -o cat -u gibtsnich.service
Failed to get data: Cannot assign requested address
# echo $?
This makes it harder to dinstinguish real errors from not having any matches, which isn't usually an error.
This appears to work these days. Closing. Please file a new bug on systemd github if this still is an error for you.