Mischa POSLAWSKY <git@xxxxxxxx> writes:
> Formatting $(taggername) on headerless tags such as v0.99 in Git
> causes a SIGABRT with error "munmap_chunk(): invalid pointer",
> because of an oversight in commit f0062d3b74 (ref-filter: free
> item->value and item->value->s, 2018-10-19).
>
> Signed-off-by: Mischa POSLAWSKY <git@xxxxxxxx>
> ---
> If I understand correctly, such tags cannot be produced normally anymore.
> Therefore I'm unsure how to make tests, and if that is even warranted.
Thanks for spotting.
I am not sure if the approach taken by this patch is the right one,
though. I didn't follow the call/dataflow thoroughly, but if we
replace unfree-able "" with NULL in these places, wouldn't
fill_missing_values() take care of them?
> ref-filter.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/ref-filter.c b/ref-filter.c
> index f27cfc8c3e..7338cfc671 100644
> --- a/ref-filter.c
> +++ b/ref-filter.c
> @@ -1028,7 +1028,7 @@ static const char *copy_name(const char *buf)
> if (!strncmp(cp, " <", 2))
> return xmemdupz(buf, cp - buf);
> }
> - return "";
> + return xstrdup("");
> }
>
> static const char *copy_email(const char *buf)
> @@ -1036,10 +1036,10 @@ static const char *copy_email(const char *buf)
> const char *email = strchr(buf, '<');
> const char *eoemail;
> if (!email)
> - return "";
> + return xstrdup("");
> eoemail = strchr(email, '>');
> if (!eoemail)
> - return "";
> + return xstrdup("");
> return xmemdupz(email, eoemail + 1 - email);
> }
