It's hard to tell without seeing the .asd file. The message says that
you completed the load-op of the system, but somehow you never did the
define-op of the system (the new action that tracks the loading of
.asd files so that defsystem-depends-on can be properly staged).

Can you tell us more about the "non-complicated" features that you
use? Do you follow the "best practices" document?
https://github.com/fare/asdf/blob/master/doc/best_practices.md

—♯ƒ • François-René ÐVB Rideau •Reflection&Cybernethics• http://fare.tunes.org
Don't forget your daily prayer to Baah-kup,
the God of data storage and recovery!



On Wed, Oct 18, 2017 at 7:35 AM, Stas Boukarev <stassats@gmail.com> wrote:
> More new warnings from ASDF 3.3, this time I have no idea what it means.
>
> WARNING:
>    Computing just-done stamp in plan NIL for action
> (ASDF/LISP-ACTION:LOAD-OP
>                                                      "system"), but
> dependency (ASDF/FIND-SYSTEM:DEFINE-OP
>
> "system") wasn't done yet!
>
> The .asd file is not public, but it looks perfectly normal without using any
> complicated features.