CREATE TABLE .. PARTITION OF fails to preserve tgenabled for inherited row triggers

CREATE TABLE t(i int) PARTITION BY RANGE(i);
CREATE TABLE t1 PARTITION OF t FOR VALUES FROM (1) TO (10);
CREATE OR REPLACE FUNCTION tgf() RETURNS trigger LANGUAGE plpgsql AS $$ begin raise exception 'except'; end $$;
CREATE TRIGGER tg AFTER INSERT ON t FOR EACH ROW EXECUTE FUNCTION tgf();
ALTER TABLE t1 DISABLE TRIGGER tg;
INSERT INTO t VALUES(1); -- inserts when trigger is disabled: good
ALTER TABLE t DISABLE TRIGGER tg;
CREATE TABLE t2 PARTITION OF t FOR VALUES FROM (10) TO (20);

postgres=# SELECT tgrelid::regclass, tgenabled FROM pg_trigger WHERE tgrelid::regclass::text IN ('t1','t2');
 tgrelid | tgenabled 
---------+-----------
 t1      | D
 t2      | O
(2 rows)

I consider this a bug,but CreateTrigStmt doesn't have any "enabled" member
(since it's impossible to CREATE TRIGGER .. DISABLED), so I'm not sure where
the fix should be.