Stored routines do now work with swe7: "The table mysql.proc is missing, corrupt, or contains bad data"

SET NAMES swe7;

DROP FUNCTION IF EXISTS f1;

CREATE FUNCTION f1() RETURNS INT RETURN 1;

SELECT f1();

ERROR 1457 (HY000): Failed to load routine test.f1. The table mysql.proc is missing, corrupt, or contains bad data (internal code -6)