Not null not enforced with temp table expression

A table defined as:

create local temporary table x (e1 string not null, e2 integer, primary key (e2))

such that the pk is not in the first position, will allow an insert such as:

insert into x (e1, e2) values ((select null), 1)

to succeed because the nullability will be checked against the declared positioning, and not the temptable positioning (in which the pk is first).