Subject: Re: [PATCH 08/11] checkout: add a missing clear_unpack_trees_porcelain()

From: Junio C Hamano <[email-masked]>
Date: Thu, 30 Jun 2022 15:20:25 -0700

Ævar Arnfjörð Bjarmason  <[email-masked]> writes:

> In 1c41d2805e4 (unpack_trees_options: free messages when done,
> 2018-05-21) we started calling clear_unpack_trees_porcelain() on this
> codepath, but missed this error path, let's also clear what we've
> allocated in that case.
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <[email-masked]>
> ---
>  builtin/checkout.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/builtin/checkout.c b/builtin/checkout.c
> index 2eefda81d8c..3d6762106e8 100644
> --- a/builtin/checkout.c
> +++ b/builtin/checkout.c
> @@ -750,6 +750,7 @@ static int merge_working_tree(const struct checkout_opts *opts,
>  		refresh_cache(REFRESH_QUIET);
>  
>  		if (unmerged_cache()) {
> +			clear_unpack_trees_porcelain(&topts);
>  			error(_("you need to resolve your current index first"));
>  			return 1;
>  		}

Does refresh_cache(REFRESH_QUIET) depend on the porcelain error
messages already set?  If not another way to fix it may be to delay
the call to setup_unpack_trees_porcelain() until it becomes needed.

But the patch as posted is certainly an improvement.

Thanks.