Re: [PATCH] show-branch: fix crash with long ref name

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On Tue, Feb 14, 2017 at 04:48:16PM +0100, Christian Couder wrote:

> @@ -791,11 +791,11 @@ int cmd_show_branch(int ac, const char **av, const char *prefix)
>  				    head_oid.hash, NULL);
>  	if (head_p) {
>  		head_len = strlen(head_p);
> -		memcpy(head, head_p, head_len + 1);
> +		head_cpy = xstrdup(head_p);
>  	}
>  	else {
>  		head_len = 0;
> -		head[0] = 0;
> +		head_cpy = xstrdup("");
>  	}

This fixes the problem, but I think we can simplify it quite a bit by
using resolve_refdup(). Here's the patch series I ended up with:

  [1/3]: show-branch: drop head_len variable
  [2/3]: show-branch: store resolved head in heap buffer
  [3/3]: show-branch: use skip_prefix to drop magic numbers

 builtin/show-branch.c | 39 ++++++++++++---------------------------
 1 file changed, 12 insertions(+), 27 deletions(-)

-Peff



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