[PATCH?] Fix 'git show' on signed tag of signed tag of commit

[Thomas Rast <trast@student.ethz.ch>]

The cmd_show loop resolves tags by showing them, then pointing the
object to the 'tagged' member.  However, this object is not fully
initialized; it only contains the SHA1.  (This resulted in a segfault
if there were two levels of tags.)  We apply parse_object to get a
full object.

Noticed by Kalle Olavi Niemitalo on IRC.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
---

I'm not 100% sure this is the right fix; I just had a quick stab at
the code, made a fix and tested it.  It probably leaks memory too, not
sure if this is a problem.

- Thomas


 builtin-log.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/builtin-log.c b/builtin-log.c
index 9817d6f..9979e37 100644
--- a/builtin-log.c
+++ b/builtin-log.c
@@ -360,7 +360,7 @@ int cmd_show(int argc, const char **argv, const char *prefix)
 					t->tag,
 					diff_get_color_opt(&rev.diffopt, DIFF_RESET));
 			ret = show_object(o->sha1, 1, &rev);
-			objects[i].item = (struct object *)t->tagged;
+			objects[i].item = parse_object(t->tagged->sha1);
 			i--;
 			break;
 		}
-- 
1.5.6.1.246.g5fc88.dirty