bug#47067: 28.0.50; [feature/native-comp] Crash while scrolling through dispnew.c

[Andrea Corallo]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Andrea Corallo <akrl@sdf.org>
>> Cc: 47067@debbugs.gnu.org
>> Date: Sun, 21 Mar 2021 08:26:45 +0000
>> 
>> If the .el was modified we will recompile it in 'eln-cache' and load it,
>> when we do this we clean-up the stale .eln present in
>> `comp-eln-load-path'.  Unfortunatelly for this case we don't do this for
>> the last directory in `comp-eln-load-path' (as this is tipically
>> read-only when Emacs is installed).
>
> The cleanup didn't happen in my case, I needed to do it manually.  Is
> that because of that "last directory in comp-eln-load-path" case, or
> because I run Emacs uninstalled?

Being uninstalled 'native-lisp' is the last entry of
`comp-eln-load-path' so yeah should be the former case.

>> > Question #2: can we somehow remove the stale .eln file in these
>> > situations?
>> 
>> I guess we should make it work for non installed case.
>> 
>> be22cda7be should do this.
>
> Thanks.  However, does this also attempt to remove stale *.eln files
> that are preloaded?  Because if they are removed, older binaries which
> were dumped with those stale *.eln files will be unable to start after
> the cleanup, right?  It's a bit of a mess, I guess.

Right good point, d0280ce1b1 reverts be22cda7be...

  Andrea