LP:601164 - Wrong result for DELETE over a table with a virtual column

DELETE over a table containing a virtual column with ORDER BY an index and with a LIMIT clause may return wrong results
if the WHERE clause contains a condition for the virtual column:

MariaDB [test]> create table t1 (a int, b int, v int as (a+1), index idx(b));
Query OK, 0 rows affected (0.00 sec)

MariaDB [test]> insert into t1(a, b) values (4, 40), (3, 30), (5, 50), (7, 70), (8, 80), (2, 20), (1, 10);
Query OK, 7 rows affected (0.00 sec)
Records: 7 Duplicates: 0 Warnings: 0

MariaDB [test]> select * from t1 order by b;
--------------

--------------

--------------
7 rows in set (0.00 sec)

MariaDB [test]> delete from t1 where v > 6 order by b limit 1;
Query OK, 0 rows affected (6.19 sec)

MariaDB [test]> select * from t1;
--------------

--------------

--------------
7 rows in set (0.00 sec)