Cyclic package TYPE dependency built with stored routine shows ERROR 1436 (HY000): Thread stack overrun

SET sql_mode=ORACLE;

DELIMITER $$

CREATE PACKAGE a AS TYPE r IS RECORD(x INT); END;

$$

CREATE PACKAGE b AS TYPE r IS RECORD(x INT); PROCEDURE p(v a.r); END;

$$

CREATE OR REPLACE PACKAGE a AS TYPE r IS RECORD(x INT); PROCEDURE q(v b.r); END;

$$

DELIMITER ;

SHOW CREATE PACKAGE a;

DELIMITER $$

CREATE PACKAGE a2 AS TYPE r IS RECORD(x INT); END;

$$

CREATE PACKAGE b2 AS TYPE r IS RECORD(x INT); FUNCTION f RETURN a2.r; END;

$$

CREATE OR REPLACE PACKAGE a2 AS TYPE r IS RECORD(x INT); FUNCTION g RETURN b2.r; END;

$$

DELIMITER ;

SHOW CREATE PACKAGE a2;