[bug#40684] [PATCH core-updates] guix: self: Use guile with libgc-7.

["Ludovic Courtès" <ludo@gnu.org>]

Hi!

Christopher Baines <mail@cbaines.net> skribis:

> Rather than libgc version 8. This should avoid crashes that can occur,
> particularly when loading data in to the Guix Data Service [1].
>
> 1: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=40525
>
> * gnu/packages/guile.scm (guile-3.0/libgc-7): New variable.
> * guix/self.scm (specification->package): Use guile-3.0/libgc-7 for guile.
> ---
>  gnu/packages/guile.scm | 12 ++++++++++++
>  guix/self.scm          |  2 +-
>  2 files changed, 13 insertions(+), 1 deletion(-)
>
> diff --git a/gnu/packages/guile.scm b/gnu/packages/guile.scm
> index 8ccbc22f26..6b7bd492ed 100644
> --- a/gnu/packages/guile.scm
> +++ b/gnu/packages/guile.scm
> @@ -309,6 +309,18 @@ without requiring the source code to be rewritten.")
>  
>  (define-public guile-next guile-3.0)
>  
> +(define-public guile-3.0/libgc-7
> +  (hidden-package
> +   (package
> +     (inherit guile-3.0)
> +     (propagated-inputs
> +      (map (lambda (input)
> +             (if (string=? (car input)
> +                           "bdw-gc")
> +                 (list "bdw-gc" libgc-7)
> +                 input))

Nitpicking: please write it as:

  `(("bdw-gc" ,libgc-7)
    ,@(alist-delete "bdw-gc" (package-propagated-inputs guile-3.0)))

as we do elsewhere.

Also, could you add a comment referencing the bug report, so we
immediately see why this variant exists?

OK with these changes, thanks!

Ludo’.