PG crashes on query

This (invalid) query crashes the 7.0.2 backend:

auction=# SELECT (select max(b.lot)) as last_lot,auction_status(a.id) > 0 AS current, a.lot, a.person_id, next_price(a.id), seller.mail AS seller_mail, buyer.mail AS buyer_mail, seller.locale AS seller_locale, buyer.login AS buyer_login, num_bid(a.id), seller.login AS seller_login, t.name AS auction_type FROM auction* a, person seller, person buyer, auction_type t,bid b WHERE a.id = 84 AND seller.id = a.person_id AND COALESCE(a.type,1) = t.id AND buyer.id = 2 AND b.person_id = buyer.id ;
pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.

Let me know if you need the DB schema for debugging.

--
Louis-David Mitterrand - ldm(at)apartia(dot)org - http://www.apartia.org

Lord, protect me from your followers.