Comment 2 for bug 1480552

Comment from https://bugzilla.redhat.com/show_bug.cgi?id=1241997

This happens in the initramfs, where some groups are not defined, and acl parsing fails. Unfortunately the parsing code (libacl) does not return meaningful error codes, so we don't have a way to differentiate between a "non-error" like missing groups, which we would simply ignore, and other errors. Some solution will have to be implemented in systemd upstream to deal with this properly.