BUG #15724: Can't create foreign table as partition

The following bug has been logged on the website:

Bug reference: 15724
Logged by: Stepan Yankevych
Email address: stepya(at)ukr(dot)net
PostgreSQL version: 11.1
Operating system: CentOS Linux release 7.5.1804 (Core)
Description:

I have two DB
big_data - PG 11.1
big_data_arch - PG 11.1

On the big_data DB i have following table

CREATE TABLE msg_json
( msg_id bigint NOT NULL DEFAULT
nextval('msg_json_msg_id_seq'::regclass),
date_id integer NOT NULL,
msg json
CONSTRAINT pk_msg_json PRIMARY KEY (date_id, msg_id) ) PARTITION BY
RANGE (date_id)
WITH (
OIDS = FALSE
)
TABLESPACE pg_default;

CREATE INDEX msg_json_cross_order_id_idx
ON msg_json USING btree
(get_jsn_cross_order_id(msg) COLLATE pg_catalog."default")
TABLESPACE ssd_ts;

CREATE INDEX msg_json_msg_id_idx
ON msg_json USING btree
(msg_id, date_id)
TABLESPACE ssd_ts;

-- Partitions SQL

CREATE TABLE msg_json_20180102 PARTITION OF msg_json
FOR VALUES FROM (20180102) TO (20180103);

CREATE TABLE msg_json_20180103 PARTITION OF msg_json
FOR VALUES FROM (20180103) TO (20180104);
...
until today

On the big_data_arch
I have the same table with the same name, structure and indexes in the
fix_capture schema but containing 2017 year data.

On the big_data DB i run following

CREATE FOREIGN TABLE staging.msg_json PARTITION of msg_json
FOR VALUES FROM (20170101) TO (20180101)
SERVER postgres_big_data_arch
OPTIONS (schema_name 'fix_capture', table_name 'msg_json');

I got error !!!!

SQL Error [42809]: ERROR: cannot create index on foreign table "msg_json"
ERROR: cannot create index on foreign table "msg_json"
ERROR: cannot create index on foreign table "msg_json"

I tried to import foreign table into staging schema and then attach
partition.
Import looks good. Foreign table contains data and i can query it through
fdw.
But running
ALTER TABLE msg_json ATTACH PARTITION staging.msg_json FOR VALUES FROM
(20170101) TO (20180101);
Brings me the same error!!!.

Thanks!