send-pack: always allocate receive status

In `receive_status()`, we record the reason why ref updates have been
rejected by the remote via the `remote_status`. But while we allocate
the assigned string when a reason was given, we assign a string constant
when no reason was given.

This has been working fine so far due to two reasons:

  - We don't ever free the refs in git-send-pack(1)'

  - Remotes always give a reason, at least as implemented by Git proper.

Adapt the code to always allocate the receive status string and free the
refs.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

builtin/send-pack.c

@@ -336,5 +336,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 		/* stable plumbing output; do not modify or localize */
 		fprintf(stderr, "Everything up-to-date\n");
 
+	free_refs(remote_refs);
+	free_refs(local_refs);
 	return ret;
 }

send-pack.c

@@ -259,7 +259,7 @@ static int receive_status(struct packet_reader *reader, struct ref *refs)
 			if (p)
 				hint->remote_status = xstrdup(p);
 			else
-				hint->remote_status = "failed";
+				hint->remote_status = xstrdup("failed");
 		} else {
 			hint->status = REF_STATUS_OK;
 			hint->remote_status = xstrdup_or_null(p);