bug#53497: 29.0.50; native-compile after restarting Emacs

[Eli Zaretskii]

> From: Arash Esbati <arash@gnu.org>
> Date: Mon, 24 Jan 2022 12:00:23 +0100
> Cc: 53497@debbugs.gnu.org
> 
> Lars Ingebrigtsen <larsi@gnus.org> writes:
> 
> > So you delete `comp-native-version-dir' between 1) and 2)?
> 
> No, that was step 0.  I did:
> 
> Case 1)
> - Killed Emacs
> - Deleted all files in `comp-native-version-dir' 

What exactly do you mean by comp-native-version-dir? it is not a full
directory name, and there should be 2 such directories in any Emacs
installation: one under lib/emacs/ and another under
~/.emacs.d/eln-cache/.  Which one did you delete?

More importantly, why do you delete that directory? what is the
purpose of that, and what did you expect to happen as result?

> - Started Emacs
> - Waited for 77 .eln to be compiled under `comp-native-version-dir'
> - Started Gnus
> - Watched Gnus libraries getting compiled
> 
> Case 2)
> - Killed Emacs
> - Deleted all files in `comp-native-version-dir'
> - Started Emacs
> - Waited for 77 .eln to be compiled under `comp-native-version-dir'
> - Killed Emacs
> - Started Emacs
> - Started Gnus
> - No compilation happens under `comp-native-version-dir'

Which of these 2 scenarios sounds problematic to you, and why?