some broken on pg_stat_user_functions

Hello

I am checking this functionality and I am afraid, so option all is broken.

postgres=# select * from pg_stat_user_functions; funcid | schemaname
| funcname | calls | total_time | self_time
--------+------------+----------+-------+------------+-----------
24608 | public | test | 6 | 2002 | 2002
(1 row)

postgres=# create or replace function test(i integer) returns int as
$$begin perform pg_sleep(1);return i; end;$$ language plpgsql;
CREATE FUNCTION
postgres=# create or replace function test1(i integer) returns int as
$$ select $1; $$ language sql;
CREATE FUNCTION
postgres=# select test(10);
test
------
10
(1 row)

postgres=# select test1(10);
test1
-------
10
(1 row)

postgres=# set track_functions to 'all';
SET
postgres=# select test1(10);
test1
-------
10
(1 row)

postgres=# select test(10);
test
------
10
(1 row)

postgres=# select * from pg_stat_user_functions; funcid | schemaname |
funcname | calls | total_time | self_time
--------+------------+----------+-------+------------+-----------
24608 | public | test | 8 | 4003 | 4003
(1 row)

I don't see call test1 :(

regards
Pavel Stehule