Weak REF CURSOR without RETURN is not opened using a dynamic SQL statement

13.1.0-opt>SET sql_mode=ORACLE;

Query OK, 0 rows affected (0.000 sec)

13.1.0-opt>CREATE TABLE t (id INT, name VARCHAR(100));

Query OK, 0 rows affected (0.008 sec)

13.1.0-opt>INSERT INTO t VALUES (1,'Test');

Query OK, 1 row affected (0.001 sec)

13.1.0-opt>

13.1.0-opt>DELIMITER $$

13.1.0-opt>CREATE PACKAGE pc AS TYPE wc IS REF CURSOR; END;

    -> $$

Query OK, 0 rows affected (0.002 sec)

13.1.0-opt>CREATE PROCEDURE pdyn AS c pc.wc; vi INT; vn VARCHAR(100);

    -> BEGIN

    -> OPEN c FOR 'SELECT id, name FROM t';

    -> FETCH c INTO vi, vn;

    -> SELECT vi, vn;

    -> CLOSE c;

    -> END;

    -> $$

ERROR 1221 (HY000): Incorrect usage of c and OPEN..FOR <dynamic string>

13.1.0-opt>

DELIMITER $$;

CREATE PACKAGE pc AS TYPE wc IS REF CURSOR; END;

$$

CREATE PROCEDURE pdyn AS c pc.wc; vi INT; vn VARCHAR(100);

BEGIN

    OPEN c FOR 'SELECT id, name FROM t';

    FETCH c INTO vi, vn;

    SELECT vi, vn;

    CLOSE c;

END;

$$

DELIMITER ;$$