[ELPA] Issue with upgrading built-in seq-2.23 in emacs-29.1 to seq-2.24

[Sylvain Bougerel]

Hi,

While trying to upgrade the package `seq' to version `2.24' (as required by `magit'), it seems an issue occurs with generating `seq-autoloads.el'.

The following command should reproduce the problem (with emacs 29.1):

  emacs -Q --batch --eval "(progn \
  (require 'package) \
  (setq package-user-dir \"~/tmp-cache\") \
  (package-initialize) \
  (package-refresh-contents) \
  (setq package-install-upgrade-built-in t) \
  (package-install 'seq))"

If combined with "--eval \"(setq debug-on-error t)\"" the above will fail

  ...

  Extracting...done
  INFO     Scraping files for loaddefs...
  INFO     Scraping files for loaddefs...done
  GEN      seq-autoloads.el
  Debugger entered--Lisp error: (file-missing "Cannot open load file" "No such file or directory" "seq-25")
  require(seq-25)

  ...

Example of the issue in an application: https://github.com/sbougerel/autosync-magit/actions/runs/6746592214/job/18397083368#step:5:82

Is this expected, or maybe I've made a mistake?

Regards,

Sylvain