Failed assertion clauses != NIL

Hi everyone,

when building PostgreSQL with -enable-cassert, executing the following
statements result in an assertion error:

CREATE TABLE t0(c0 boolean, c1 boolean, c2 boolean);
INSERT INTO t0 VALUES(FALSE, FALSE, FALSE);
CREATE STATISTICS s0 ON c0, c2 FROM t0;
ANALYZE;
SELECT * FROM t0 WHERE t0.c2 OR t0.c1 OR t0.c0;

I can reproduce this on the latest trunk version (7f33836).

Best,
Manuel

Stacktrace:

TRAP: FailedAssertion("clauses != NIL", File: "mcv.c", Line: 1551)
postgres: postgres db [local] SELECT(ExceptionalCondition+0x76)[0x5563ab44e4a6]
postgres: postgres db [local] SELECT(+0x3d6e91)[0x5563ab2e1e91]
postgres: postgres db [local]
SELECT(mcv_clauselist_selectivity+0x41)[0x5563ab2e47b1]
postgres: postgres db [local]
SELECT(statext_clauselist_selectivity+0x362)[0x5563ab2e1692]
postgres: postgres db [local]
SELECT(clauselist_selectivity+0x174)[0x5563ab227134]
postgres: postgres db [local]
SELECT(set_baserel_size_estimates+0x38)[0x5563ab22dc38]
postgres: postgres db [local] SELECT(+0x319198)[0x5563ab224198]
postgres: postgres db [local] SELECT(make_one_rel+0x100)[0x5563ab226150]
postgres: postgres db [local] SELECT(query_planner+0x15b)[0x5563ab24b3fb]
postgres: postgres db [local] SELECT(+0x34531c)[0x5563ab25031c]
postgres: postgres db [local] SELECT(subquery_planner+0xd39)[0x5563ab253389]
postgres: postgres db [local] SELECT(standard_planner+0x117)[0x5563ab254567]
postgres: postgres db [local] SELECT(pg_plan_query+0x39)[0x5563ab320469]
postgres: postgres db [local] SELECT(pg_plan_queries+0x46)[0x5563ab320556]
postgres: postgres db [local] SELECT(+0x4158cf)[0x5563ab3208cf]
postgres: postgres db [local] SELECT(PostgresMain+0x14ef)[0x5563ab32228f]
postgres: postgres db [local] SELECT(+0x38d324)[0x5563ab298324]
postgres: postgres db [local] SELECT(PostmasterMain+0xe01)[0x5563ab299241]
postgres: postgres db [local] SELECT(main+0x4b8)[0x5563aafc1048]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7f128537eb6b]
postgres: postgres db [local] SELECT(_start+0x2a)[0x5563aafc10ea]
2019-11-19 13:35:55.103 CET [22654] LOG: server process (PID 23121)
was terminated by signal 6: Aborted
2019-11-19 13:35:55.103 CET [22654] DETAIL: Failed process was
running: SELECT * FROM t0 WHERE t0.c2 OR t0.c1 OR t0.c0;