Subject: bug#46972: RE : RE : RE : bug#46972: 28.0.50; [feature/native-comp] Emacs locks itself during native compilation because of permission denied

From: Eli Zaretskii <[email-masked]>
Date: Fri, 12 Mar 2021 09:36:01 +0200

> From: Matt M <[email-masked]>
> CC: "[email-masked]" <[email-masked]>
> Date: Fri, 12 Mar 2021 00:26:18 +0000
> 
> The Following patch seems to fix my problem :
> --- a/lisp/emacs-lisp/comp.el
> +++ b/lisp/emacs-lisp/comp.el
> @@ -3778,13 +3778,7 @@ comp-delete-or-replace-file
>           (while
>               (condition-case _
>                   (progn
> -                   ;; oldfile maybe recreated by another Emacs in
> -                   ;; between the following two rename-file calls
> -                   (if (file-exists-p oldfile)
> -                       (rename-file oldfile (make-temp-file-internal
> -                                             (file-name-sans-extension oldfile)
> -                                             nil ".eln.old" nil)
> -                                    t))
> +                   (delete-file oldfile)
>                     (when newfile
>                       (rename-file newfile oldfile nil))
>                     ;; Keep on trying.
> Changed the call to rename-file to delete-file.

Thanks, but I don't think we can use this solution, due to the reason
explained in the comment there.  (You can, of course, use it locally,
if the danger described there is not relevant for your usage.)

I apologize that I didn't yet have time to recreate the problem you
described and look into it: the native-comp branch is still not stable
enough for me to try such non-trivial situations.  I didn't forget,
though.