Ryan Sundberg via Guix-patches via <guix-patches@gnu.org> writes:

> `make check` is not reliable for lcov when run in parallel
> (e.g. `make -j 24 check`). Disable parallelism for the test suite.

Please also write this in the comments of the code. Make it easy for
people to know later

>
> * gnu/packages/code (lcov): Set #:parallel-tests? #f
>
> Signed-off-by: Ryan Sundberg <ryan@arctype.co>
> Change-Id: Ibb3618c4786dfbb50b90e725297947458115347c
> ---
>  gnu/packages/code.scm | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/gnu/packages/code.scm b/gnu/packages/code.scm
> index 04ca4dfd6b..6ac514a5b5 100644
> --- a/gnu/packages/code.scm
> +++ b/gnu/packages/code.scm
> @@ -556,6 +556,7 @@ (define-public lcov
>       '(#:test-target "test"
>         #:make-flags (list (string-append "PREFIX="
>                                           (assoc-ref %outputs "out")))
> +       #:parallel-tests? #f
>         #:phases
>         (modify-phases %standard-phases
>           (add-after 'unpack 'patch-references-to-commands
>
> base-commit: ce877a777e6ec089dc347e9883387d3080b471cf