'pos' is incremented after each assignment. If we use the maximum number of arguments, we end up with pos==9 after all the assignments, and it points to where the next value would be assigned. This position must remain NULL. The assert I "fixed" was intentionally introduced in 26abdc73a212b90f7c4b71808a1028d2e87ab09f as a bugfix. So my "fix" repeated the same error that was fixed back then.
System and Service Manager
Details
Most documentation is available on systemd's web site.
Assorted, older, general information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what's new in the most recent systemd versions.
Please see the Code Map for information about this repository's layout and content.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list or join our IRC channel.
Stable branches with backported patches are available in the stable repo.