PL/pgSQL PERFORM with CTE

Hackers,

This seems reasonable:

david=# DO $$
david$# BEGIN
david$# WITH now AS (SELECT now())
david$# SELECT * from now;
david$# END;
david$# $$;
ERROR: query has no destination for result data
HINT: If you want to discard the results of a SELECT, use PERFORM instead.
CONTEXT: PL/pgSQL function inline_code_block line 3 at SQL statement

This not so much:

david=# DO $$
david$# BEGIN
david$# WITH now AS (SELECT now())
david$# PERFORM * from now;
david$# END;
david$# $$;
ERROR: syntax error at or near "PERFORM"
LINE 4: PERFORM * from now;
^
Parser bug in PL/pgSQL, perhaps?

Best,

David