Subject: Re: [PATCH] merge-ort: fix calling merge_finalize() with no intermediate merge

From: Derrick Stolee <[email-masked]>
Date: Thu, 20 Apr 2023 09:10:47 -0400

On 4/20/2023 3:14 AM, Elijah Newren via GitGitGadget wrote:
> From: Elijah Newren <[email-masked]>

> While at it, ensure the FREE_AND_NULL() in the function does something
> useful with the nulling aspect, namely sets result->priv to NULL rather
> than a mere temporary.

Good call. It also makes the code look better.
 
>  void merge_finalize(struct merge_options *opt,
>  		    struct merge_result *result)
>  {
> -	struct merge_options_internal *opti = result->priv;
> -
>  	if (opt->renormalize)
>  		git_attr_set_direction(GIT_ATTR_CHECKIN);
>  	assert(opt->priv == NULL);
>  
> -	clear_or_reinit_internal_opts(opti, 0);
> -	FREE_AND_NULL(opti);
> +	if (!result->priv)
> +		return;
> +	clear_or_reinit_internal_opts(result->priv, 0);
> +	FREE_AND_NULL(result->priv);

Perhaps this would be better as

	if (result->priv) {
		clear_or_reinit_internal_opts(result->priv, 0);
		FREE_AND_NULL(result->priv);
	}

to avoid an accidental addition of code to the end of this
method that doesn't depend on result->priv?

Thanks,
-Stolee