The test failed on branch=master, cloud=gce:
test artifacts and logs in: /home/agent/work/.go/src/github.com/cockroachdb/cockroach/artifacts/sqlsmith/setup=rand-tables/setting=no-mutations/run_1
	sqlsmith.go:223,sqlsmith.go:256,test_runner.go:777: error: pq: internal error: no volatility for cast tuple[]::tuple[]
		stmt:
		WITH
			with_48888 (col_274098) AS (SELECT * FROM (VALUES ('01:37:47.348558':::TIME)) AS tab_119279 (col_274098)),
			with_48889 (col_274099)
				AS (
					SELECT * FROM (VALUES (ARRAY[(),(),(),()]), (NULL), (ARRAY[(),(),()])) AS tab_119280 (col_274099)
					EXCEPT ALL
						SELECT
							*
						FROM
							(VALUES (ARRAY[]:::RECORD[]), (ARRAY[(),(),(),()]), (ARRAY[]:::RECORD[])) AS tab_119281 (col_274100)
				),
			with_48890 (col_274101)
				AS (
					SELECT
						*
					FROM
						(VALUES ('m':::rand_typ_2), ('zslc':::rand_typ_2), ('zn':::rand_typ_2), ('zn':::rand_typ_2))
							AS tab_119282 (col_274101)
				)
		SELECT
			cte_ref_14196.col_274098 AS col_274102
		FROM
			with_48888 AS cte_ref_14196
		WHERE
			true;