VTGate hanging for queries that fail in MySQL

[systay]

When running a recursive CTE that doesn't have a limit, MySQL fails the query with:

> with recursive cte as (select 1 as n union all select n+1 from cte)
select *
from cte

ERROR 3636 (HY000): Recursive query aborted after 1001 iterations. Try increasing @@cte_max_recursion_depth to a larger value.0

Vitess also fails correctly in OLTP mode, but in OLAP mode the connection just hangs.