INSERT IGNORE inserts a row with a virtual column with invalid expression

10.11.19-dbg>CREATE TABLE t (pk INT PRIMARY KEY, a VARBINARY(10) NOT NULL DEFAULT '', v TINYINT AS (a & 65536) VIRTUAL, KEY(v)) ENGINE=InnoDB;

Query OK, 0 rows affected (0.009 sec)

10.11.19-dbg>  INSERT IGNORE INTO t (pk) VALUES (1);

Query OK, 1 row affected, 1 warning (0.001 sec)

10.11.19-dbg>  CHECK TABLE t EXTENDED;

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

| Table  | Op    | Msg_type | Msg_text                              |

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

| test.t | check | Warning  | Truncated incorrect DECIMAL value: '' |

| test.t | check | status   | OK                                    |

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

2 rows in set (0.000 sec)

10.11.19-dbg>  CHECK TABLE t ;

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

| Table  | Op    | Msg_type | Msg_text |

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

| test.t | check | status   | OK       |

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

1 row in set (0.000 sec)