Re: [PATCH v5 3/8] packed-backend: check whether the "packed-refs" is regular file

> diff --git a/refs/packed-backend.c b/refs/packed-backend.c
> index a7b6f74b6e..8140a31d07 100644
> --- a/refs/packed-backend.c
> +++ b/refs/packed-backend.c
> @@ -1748,15 +1749,43 @@ static struct ref_iterator *packed_reflog_iterator_begin(struct ref_store *ref_s
>  	return empty_ref_iterator_begin();
>  }
>  
> -static int packed_fsck(struct ref_store *ref_store UNUSED,
> -		       struct fsck_options *o UNUSED,
> +static int packed_fsck(struct ref_store *ref_store,
> +		       struct fsck_options *o,
>  		       struct worktree *wt)
>  {
> +	struct packed_ref_store *refs = packed_downcast(ref_store,
> +							REF_STORE_READ, "fsck");
> +	struct stat st;
> +	int ret = 0;
>  
>  	if (!is_main_worktree(wt))
> -		return 0;
> +		goto cleanup;
>  
> -	return 0;
> +	if (o->verbose)
> +		fprintf_ln(stderr, "Checking packed-refs file %s", refs->path);
> +
> +	if (lstat(refs->path, &st) < 0) {
> +		/*
> +		 * If the packed-refs file doesn't exist, there's nothing
> +		 * to check.
> +		 */
> +		if (errno == ENOENT)
> +			goto cleanup;
> +		ret = error_errno(_("unable to stat %s"), refs->path);