Record in index was not found on rollback, trying to insert: TUPLE

--source include/have_innodb.inc

CREATE TEMPORARY TABLE t1 (i INT, KEY (i)) ENGINE=InnoDB;

INSERT INTO t1 VALUES (NULL),(NULL);

UPDATE t1 SET i = 0;

START TRANSACTION;

UPDATE t1 SET i = 4;

UPDATE t1 SET i = 0;

ROLLBACK;

2018-05-07 18:09:02 139988084655872 [Warning] InnoDB: Record in index `i` of table `mysqld.1`.`#sql3893_9_0` was not found on rollback, trying to insert: TUPLE (info_bits=0, 2 fields): {[4]    (0x00000000),[6]      (0x000000000201)} at: COMPACT RECORD(info_bits=32, 2 fields): {NULL,[6]      (0x000000000201)}

2018-05-07 18:09:02 139988084655872 [Warning] InnoDB: Record in index `i` of table `mysqld.1`.`#sql3893_9_0` was not found on rollback, trying to insert: TUPLE (info_bits=0, 2 fields): {[4]    (0x00000000),[6]      (0x000000000200)} at: COMPACT RECORD(info_bits=32, 2 fields): {NULL,[6]      (0x000000000201)}