array surprising behavior

Hi,

I think this is most surprising behavior -- shouldn't the UPDATE raise
an error?

alvherre=# create table foo (a int[]);
CREATE TABLE
alvherre=# insert into foo values (null);
INSERT 33649 1
alvherre=# update foo set a[3] = '42';
UPDATE 1
alvherre=# select a, a is null from foo;
a | ?column?
---+----------
| t
(1 fila)
alvherre=# select version();
version
-----------------------------------------------------------------------------------------------------------
PostgreSQL 7.5devel on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.3.1 (Mandrake Linux 9.2 3.3.1-2mdk)
(1 fila)

(This is CVS tip as of a couple weeks ago)

--
Alvaro Herrera (<alvherre[a]dcc.uchile.cl>)
"El destino baraja y nosotros jugamos" (A. Schopenhauer)