refcnt leak ?

Hi

While examining recursive use of catalog cache,I found
a refcnt leak of relations.
After further investigation,I found that the following seems
to be the cause.

[ in EndAppend() in nodeAppend.c ]

appendstate->as_result_relation_info_list = NIL;
/*
* This next step is critical to prevent EndPlan() from trying to close

* an already-closed-and-deleted RelationInfo ---
es_result_relation_info
* is pointing at one of the nodes we just zapped above.
*/
estate->es_result_relation_info = NULL;

This seems to cause a refcnt leak when
appendstate->as_result_relation_info_list is NIL from the first
e.g. in the case INSERT INTO .. SELECT ...

Comments ?

BTW,doesn't EndAppend() neglect to call ExecCloseIndices()
for RelationInfos of appendstate->as_result_relation_info_list ?

Regards.
Hiroshi Inoue