Behavior for TRUNCATE versioned table is not documented and not covered by tests

MariaDB [test]> select *, row_start, row_end from t3 for system_time all;

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

| a    | row_start                  | row_end                    |

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

|    1 | 2018-04-22 02:21:24.283521 | 2018-04-22 02:21:27.809661 |

|    2 | 2018-04-22 02:21:24.283521 | 2038-01-19 05:14:07.999999 |

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

2 rows in set (0.00 sec)

MariaDB [test]> truncate table t3;

Query OK, 0 rows affected (0.20 sec)

MariaDB [test]> select *, row_start, row_end from t3 for system_time all;

Empty set (0.00 sec)