This query crashes the backend too.
template1=> select @1;
pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally before or while processing the request.
We have lost the connection to the backend, so further processing is impossible. Terminating.
With 6.3.2 the same query produces:
test=> select @1;
ERROR: Can't find left op: @ for type 23
--
Tatsuo Ishii
t-ishii(at)sra(dot)co(dot)jp