Access violation (0xC0000005) in PSQLODBC35W.DLL when calling SQLDescribeColW

Hi all

I'm getting an access violation from within SQLDescribeColW when I'm 
getting the result scheme from a query.

the query is pretty simple:

SELECT count(*) as folder_files, sum(file_size) as folder_size, 
sum(disk_use) as folder_size_disk, folder_id from cache_index where 
volume_id = %u group by folder_id

SQLExecute returns OK
SQLNumResultCols returns 4 columns as expected

the SQLDescribeColW blows up when calling with column #2, corresponding 
to sum(file_size).  file_size is a bigint field.  There are only 5 
records, and the sum of the file_size is under 1MB.  So shouldn't be any 
bigint overflow or something.

I used to use a double precision and it worked fine, then I figured out 
how to store into a bigint field and now this happens every time I do 
this query if there are any records in the table.  If there are no 
records it's fine.

Regards

Adrien de Croy