Re: nadvice compatibility in package list

[Stefan Monnier]

>   (assoc 'nadvice package--builtin-versions)
>   => (nadvice 1 0)

This is right.

>   (assoc 'nadvice package--builtins)
>   => nil

This is wrong.

Thomas Fitzsimmons <address@hidden> writes:
> diff --git a/lisp/emacs-lisp/nadvice.el b/lisp/emacs-lisp/nadvice.el
> index 2278e389ce..ffecb24b1a 100644
> --- a/lisp/emacs-lisp/nadvice.el
> +++ b/lisp/emacs-lisp/nadvice.el
> @@ -3,8 +3,11 @@
>  ;; Copyright (C) 2012-2019 Free Software Foundation, Inc.
>  
>  ;; Author: Stefan Monnier <address@hidden>
> +;; Note: Always keep this built-in nadvice version greater than any
> +;; nadvice version that has been or ever will be in GNU ELPA.
> +;; Version: 10.0.0
>  ;; Keywords: extensions, lisp, tools
> -;; Package: emacs
> +;; Package: nadvice
>  
>  ;; This program is free software; you can redistribute it and/or modify
>  ;; it under the terms of the GNU General Public License as published by

We already have defined its version as 1.0, so it would be better to
keep it that way.  I think the only thing that really matters is to
remove the `Package: emacs` line (which is a line that explicitly
*prevents* the file from being considered as a package in its own
right).

So I think the patch below will do the trick as well.
Can you confirm?


        Stefan


diff --git a/lisp/emacs-lisp/nadvice.el b/lisp/emacs-lisp/nadvice.el
index 2278e389ce..b0dd03edfd 100644
--- a/lisp/emacs-lisp/nadvice.el
+++ b/lisp/emacs-lisp/nadvice.el
@@ -4,7 +4,6 @@
 
 ;; Author: Stefan Monnier <address@hidden>
 ;; Keywords: extensions, lisp, tools
-;; Package: emacs
 
 ;; This program is free software; you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
diff --git a/lisp/finder.el b/lisp/finder.el
index f95049f60b..ad9441210c 100644
--- a/lisp/finder.el
+++ b/lisp/finder.el
@@ -240,7 +240,8 @@ finder-compile-keywords
                               (lm-synopsis))
                  version  (lm-header "version")))
          (when summary
-           (setq version (ignore-errors (version-to-list version)))
+           (setq version (or (ignore-errors (version-to-list version))
+                              (alist-get package package--builtin-versions)))
            (setq entry (assq package package--builtins))
            (cond ((null entry)
                   (push (cons package