bug#63260: 29.0.90; Regression installing/activating packages without autoloads

[Eli Zaretskii <eliz@gnu.org>]

> Cc: 63260@debbugs.gnu.org, Philip Kaludercic <philipk@posteo.net>
> Date: Sat, 06 May 2023 15:10:23 +0200
> From:  Basil Contovounesios via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> Robert Pluim [2023-05-05 08:36 +0200] wrote:
> 
> > The file-missing error is expected, no? Thatʼs why the autoloads
> > loading is wrapped in `with-demoted-errors'. Although if the message bothers
> > you, I guess we could check `file-exists-p' for it.
> 
> I think it's problematic to emit even a demoted error for supported
> circumstances, such as a 'library' package that defines no autoload
> cookies.
> 
> Besides, shouldn't the autoloads file be generated unconditionally?
> https://lists.gnu.org/r/emacs-devel/2022-06/msg00570.html
> 
> While the error logged to *Messages* is relatively silent, its subequent
> repetition on Emacs startup is not:
> 
> $ emacs-29
> Error loading autoloads: (file-missing Cannot open load file
> No such file or directory
> /tmp/tmp.QQvQfBZ384/.emacs.d/elpa/sicp-20200512.1137/sicp-autoloads)
> 
> This does not seem like TRT to me.

What happened in Emacs 28 in the same situation?