JOIN_PREFIX binds the wrong table when aliases differ only by case

CREATE DATABASE hint_order;

USE hint_order;

CREATE TABLE t1(k INT);

INSERT INTO t1 VALUES (1),(2);

SELECT @@lower_case_table_names;

SELECT 'BEGIN_control';

EXPLAIN SELECT /*+ JOIN_PREFIX(b) */ a.k,b.k

FROM t1 a, t1 b;

SHOW WARNINGS;

SELECT 'END_control';

SELECT 'BEGIN_case';

EXPLAIN SELECT /*+ JOIN_PREFIX(A) */ a.k,A.k

FROM t1 a, t1 A;

SHOW WARNINGS;

SELECT 'END_case';

DROP DATABASE hint_order;

SELECT COUNT(*)

FROM information_schema.schemata

WHERE schema_name='hint_order';

@@lower_case_table_names

0

BEGIN_control

id  select_type  table  type  possible_keys  key   key_len  ref   rows  Extra

1   SIMPLE       b      ALL   NULL           NULL  NULL     NULL  2

1   SIMPLE       a      ALL   NULL           NULL  NULL     NULL  2     Using join buffer (flat, BNL join)

END_control

BEGIN_case

id  select_type  table  type  possible_keys  key   key_len  ref   rows  Extra

1   SIMPLE       a      ALL   NULL           NULL  NULL     NULL  2

1   SIMPLE       A      ALL   NULL           NULL  NULL     NULL  2     Using join buffer (flat, BNL join)

END_case

COUNT(*)

0