User-defined type problem

Hi,

I want test the use of user-defined type. to make this I used the example of
complex type.

When I wanted insert values in test_complex table I got the following error.

test1=# INSERT INTO test_complex VALUES ('(1.0, 2.5)', '(4.2, 3.55 )');
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.
!#

can somebody explain me what happened and how I can solve this.

thank you.

Mourad.