Cannot repair myisam table with mysqlcheck option --use-frm

CREATE  TABLE IF NOT EXISTS `testdb`.`t1` (

  `Idx` INT(11) UNSIGNED NOT NULL AUTO_INCREMENT ,

  PRIMARY KEY (`Idx`))

ENGINE = MYISAM

DEFAULT CHARACTER SET = latin1

COLLATE = latin1_german1_ci

COMMENT = 'test table';

mysqlcheck -ce testdb t1

testdb.t1                                   OK

rm t1.MYI

mysqlcheck -ce testdb t1

Failed to SHOW CREATE TABLE `t1`

Error: Can't find file: './testdb/t1.MYI' (errno: 2 "No such file or directory")

mysqlcheck -r --use-frm testdb t1

Failed to SHOW CREATE TABLE `t1`

Error: Can't find file: './testdb/t1.MYI' (errno: 2 "No such file or directory")

mysql --database=testdb  --execute="REPAIR TABLE t1 USE_FRM"

+------------------+--------+----------+------------------------------------+

| Table            | Op     | Msg_type | Msg_text                           |

+------------------+--------+----------+------------------------------------+

| testdb.t1 | repair | warning  | Number of rows changed from 0 to 6 |

| testdb.t1 | repair | status   | OK                                 |

+------------------+--------+----------+------------------------------------+

mysqlcheck -ce testdb t1

testdb.t1