bug#66993: [PATCH] project.el: avoid asking user about project-list-file lock

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 8 Nov 2023 02:24:13 +0200
> From: Dmitry Gutov <dmitry@gutov.dev>
> 
> Anyway, maybe an implementation like this (totally untested)?
> 
> Or the warning could be skipped entirely.
> 
> diff --git a/lisp/progmodes/project.el b/lisp/progmodes/project.el
> index a6426c08840..e544dfefa73 100644
> --- a/lisp/progmodes/project.el
> +++ b/lisp/progmodes/project.el
> @@ -1719,7 +1719,9 @@ project--write-project-list
>                                   (expand-file-name name)))))
>                       project--list)
>               (current-buffer)))
> -      (write-region nil nil filename nil 'silent))))
> +      (let ((noninteractive t))
> +        (with-demoted-errors "Failed to save file list: %S"
> +          (write-region nil nil filename nil 'silent))))))

Isn't the cure worse than the disease? we are in effect disregarding
all errors that prevent us from saving the file.  If those errors are
not important, why save the list to the file at all?