BUG #8227: referential integrity problem

The following bug has been logged on the website:

Bug reference: 8227
Logged by: Greg Brzezinski
Email address: greg@antrez.pl
PostgreSQL version: 9.2.4
Operating system: linux
Description:

postgres=# CREATE TABLE test( id int primary key, name text );
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "test_pkey"
for table "test"
CREATE TABLE
postgres=# CREATE TABLE test_item( id int primary key, test_id int
references test(id) match full on update cascade on delete cascade, content
text );
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index
"test_item_pkey" for table "test_item"
CREATE TABLE
postgres=# CREATE OR REPLACE FUNCTION test_item_delete_lock() returns
trigger AS $f$
postgres$# begin
postgres$# return null;
postgres$# end;
postgres$# $f$ language plpgsql;
CREATE FUNCTION
postgres=# CREATE TRIGGER test_item_delete_lock BEFORE DELETE ON test_item
FOR EACH ROW EXECUTE PROCEDURE test_item_delete_lock();
CREATE TRIGGER
postgres=#
postgres=# insert into test values (1, 'one');
INSERT 0 1
postgres=# insert into test_item values (1, 1, 'for one');
INSERT 0 1
postgres=# delete from test where id = 1;
DELETE 1
postgres=# select * from test_item;
id | test_id | content
----+---------+---------
1 | 1 | for one
(1 row)

postgres=# select * from test;
id | name
----+------
(0 rows)

Is it ok that we loose referential integrity by locking DELETE on table
test_item ?

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