Not found is not work of cursor in oracle mode and loop forever

CREATE TABLE t1 (a INT, b VARCHAR(10),c DATETIME(3));

INSERT INTO t1 VALUES (1,'b1','2001-01-01 10:20:30.123');

INSERT INTO t1 VALUES (2,'b2','2001-01-02 10:20:30.123');

CREATE TABLE t2 LIKE t1;

set sql_mode='oracle';

DELIMITER $$

CREATE PROCEDURE p1()

AS

  done INT DEFAULT 0;

  v_a t1.a%type;

  v_b t1.b%type;

  v_c t1.c%type;

  CURSOR c IS SELECT a,b,c FROM t1;

  CONTINUE HANDLER FOR NOT FOUND SET done=TRUE;

BEGIN

  OPEN c;

  <<read_loop>> LOOP

    FETCH c INTO v_a, v_b, v_c;

    IF done THEN

      LEAVE read_loop;

    END IF;

    INSERT INTO t2 (a,b,c) VALUES (v_a, v_b, v_c);

  END LOOP;

  CLOSE c;

END;

$$

DELIMITER ;

-- without fix this will insert forever

CALL p1();