Re: [PATCH v10 4/4] hook: introduce the receive-report hook

> Karthik Nayak <karthik.188@gmail.com> writes:
>
>> +static void override_cmds_error(struct command *commands, const char *err)
>> +{
>> +	for (struct command *cmd = commands; cmd; cmd = cmd->next) {
>> +		if (cmd->error_string_owned)
>> +			FREE_AND_NULL(cmd->error_string_owned);
>> +		cmd->error_string = err;
>> +	}
>> +}
>
> This is my fault, but like free(), FREE_AND_NULL() can safely be
> called on a variable that already is NULL so we may want to fix up
> after the dust settles, perhaps?
>

>  builtin/receive-pack.c      | 3 +--
>  tools/coccinelle/free.cocci | 6 ++++++
>  2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git c/builtin/receive-pack.c w/builtin/receive-pack.c
> index 9ac7717096..1d5b050beb 100644
> --- c/builtin/receive-pack.c
> +++ w/builtin/receive-pack.c
> @@ -2452,8 +2452,7 @@ static void update_shallow_info(struct command *commands,
>  static void override_cmds_error(struct command *commands, const char *err)
>  {
>  	for (struct command *cmd = commands; cmd; cmd = cmd->next) {
> -		if (cmd->error_string_owned)
> -			FREE_AND_NULL(cmd->error_string_owned);
> +		FREE_AND_NULL(cmd->error_string_owned);
>  		cmd->error_string = err;
>  	}
>  }
> diff --git c/tools/coccinelle/free.cocci w/tools/coccinelle/free.cocci
> index 03799e1908..c95ffa2a07 100644
> --- c/tools/coccinelle/free.cocci
> +++ w/tools/coccinelle/free.cocci
> @@ -43,3 +43,9 @@ statement S;
>    S
>    commit_list_free(E);
>  - }
> +@@
> +expression E;
> +@@
> +- if (E)
> +-  FREE_AND_NULL(E);
> ++ FREE_AND_NULL(E);