[bug#71580] [PATCH] doc: Add message for common error about make check-system

[Maxim Cournoyer <maxim.cournoyer@gmail.com>]

Hi Richard,

Richard Sent <richard@freakingpenguin.com> writes:

> * doc/contributing.texi (Running the Test Suite): Mention that make clean-go
> may need to be run before running make check-system when previous builds were
> run with different work trees. See https://issues.guix.gnu.org/47573.
>
> Change-Id: I4b68d3a05f1425505816db969284487d725840d6
> ---
> Sending a followup rebased on current master.
>
>  doc/contributing.texi | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
>
> diff --git a/doc/contributing.texi b/doc/contributing.texi
> index 938c8bfdb1..c9591dc9bf 100644
> --- a/doc/contributing.texi
> +++ b/doc/contributing.texi
> @@ -411,6 +411,20 @@ Running the Test Suite
>  substitutes are available for their dependencies (@pxref{Substitutes}).
>  Some of them require a lot of storage space to hold VM images.
>  
> +If you encounter an error like:
> +
> +@example
> +Compiling Scheme modules...
> +ice-9/eval.scm:142:16: In procedure compile-top-call:
> +error: all-system-tests: unbound variable
> +hint: Did you forget `(use-modules (gnu tests))'?
> +@end example
> +
> +@noindent
> +there may be inconsistency in the work tree from previous builds.  To

perhaps        ^ an inconsistency?  alternatively, 'inconsistencies'.

> +resolve this, try running @command{make clean-go} followed by
> +@command{make}.
> +
>  Again in case of test failures, please send @email{bug-guix@@gnu.org}
>  all the details.

I guess the fact that there is an open issue from a different perhaps
about this problem on the tracker means it's bit enough people that it
merits to be mentioned in the doc.

Reviewed-by: Maxim Cournoyer <maxim.cournoyer@gmail>

-- 
Thanks,
Maxim