sqlline hangs when query is cancelled while results are returned from the server

1. Ran a query that returns millions of rows
2. When sqlline started to return results decided to cancel it: pressed Ctrl-C
3. sqlline was completely hosed + server never received cancellation request
4. cancelled query through Web UI
5. sqlline "released"

To reproduce:

1. Single drillbit
2. 8GB direct memory, 4GB heap
3. Run query below:

use tpcds100;
select 
  sum(ss_quantity) over(partition by ss_store_sk order by ss_sold_date_sk) 
from store_sales;