Alter table leads to a truncation warning with ANALYZE command

--source include/have_innodb.inc

set @@optimizer_use_condition_selectivity=4;

set @@use_stat_tables=PREFERABLY;

create table t1 (a int)engine=InnoDB;

insert into t1 values (1),(1),(2),(3);

MariaDB [test]> analyze table t1;

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

| Table   | Op      | Msg_type | Msg_text                                |

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

| test.t1 | analyze | status   | Engine-independent statistics collected |

| test.t1 | analyze | status   | OK                                      |

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

MariaDB [test]> alter table t1 change a b int;

Query OK, 0 rows affected (0.029 sec)

Records: 0  Duplicates: 0  Warnings: 0

MariaDB [test]> analyze table t1;

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

| Table   | Op      | Msg_type | Msg_text                                           |

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

| test.t1 | analyze | status   | Engine-independent statistics collected            |

| test.t1 | analyze | Note     | Data truncated for column 'avg_frequency' at row 1 |

| test.t1 | analyze | status   | OK                                                 |

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

MariaDB [test]> select * from mysql.column_stats;

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

| db_name | table_name | column_name | min_value | max_value | nulls_ratio | avg_length | avg_frequency | hist_size | hist_type | histogram |

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

| test    | t1         | b           | 1         | 3         |      0.0000 |     4.0000 |        1.3333 |         0 | NULL      | NULL      |

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

1 row in set (0.001 sec)