SET client_min_messages = warning;
CREATE EXTENSION IF NOT EXISTS vector;
SET enable_seqscan = off;
CREATE TABLE t (val vector(3));
CREATE INDEX ON t USING ivfflat (val) WITH (lists = 0);
ERROR:  value 0 out of bounds for option "lists"
DETAIL:  Valid values are between "1" and "32768".
CREATE INDEX ON t USING ivfflat (val) WITH (lists = 32769);
ERROR:  value 32769 out of bounds for option "lists"
DETAIL:  Valid values are between "1" and "32768".
SHOW ivfflat.probes;
 ivfflat.probes 
----------------
 1
(1 row)

DROP TABLE t;