Crash test on PG 9.0.4

gistfile1.txt

CREATE LANGUAGE
psql:crashtest.sql:5: NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "foo_pkey" for table "foo"
CREATE TABLE
CREATE FUNCTION
 id | value 
----+-------
  1 |     2
(1 row)

ALTER TABLE
ALTER TABLE
UPDATE 1
psql:crashtest.sql:23: ERROR:  key "........pg.dropped.2........" not found in mapping
HINT:  To return null in a column, add the value None to the mapping with the key named after the column.
CONTEXT:  while creating return value
PL/Python function "get_foo"