The following message is generated both on byte-compile and on buttercup, and the checks pass even if they are not run:
/nix/store/vilh5ays3ymz3xkwk0fri2a70lha7pfc-stdenv-linux/setup: line 109: use-package-tags: expression recursion level exceeded (error token is "package-tags")
This only happens in the testing workflow (which runs on all Emacs versions), and not in the linting workflow (which runs only on a specific Emacs version).
See this workflow run.
The following message is generated both on byte-compile and on buttercup, and the checks pass even if they are not run:
This only happens in the testing workflow (which runs on all Emacs versions), and not in the linting workflow (which runs only on a specific Emacs version).