Forked server crashes in Item_ident::print() for a Temptable_field.

MariaDB [cs]> show create table cs1;

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

| Table | Create Table                                                                                                             |

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

| cs1   | CREATE TABLE `cs1` (

  `i` int(11) DEFAULT NULL,

  `it` int(11) DEFAULT NULL

) ENGINE=Columnstore DEFAULT CHARSET=latin1 |

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

1 row in set (0.00 sec)

MariaDB [cs]> select * from cs1;

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

| i    | it   |

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

|    1 |    2 |

|    3 |    4 |

|   25 |   26 |

|   25 |    1 |

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

4 rows in set (0.06 sec)

MariaDB [cs]> select sum(i)+1 from cs1 group by i;

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

| sum(i)+1 |

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

| 4        |

| 2        |

| 51       |

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

3 rows in set (0.02 sec)

MariaDB [cs]> set infinidb_vtable_mode=0;

Query OK, 0 rows affected (0.00 sec)

MariaDB [cs]> select sum(i)+1 from cs1 group by i;