jlapham(at)gandalf(dot)bioqmed(dot)ufrj(dot)br writes:
> v7.0.0:
> template1=# create table a (id char[2]);
> CREATE
> template1=# insert into a (id) values (NULL);
> pqReadData() -- backend closed the channel unexpectedly.
This is fixed in 7.0.1.
regards, tom lane