test.sql

create table demo (
  id int,
  useless int,
  d timestamp,
  b boolean
) partition by range (id, d);

alter table demo drop column useless;

-- only seems to cause failure when it's a partial index on b.
create index on demo(b) where b = 't';

create table demo_1_20191031 partition of demo for values from (1, '2019-10-31') to (1, '2019-11-01');

-- psql:foo.sql:13: ERROR:  unexpected varattno 4 in expression to be mapped
-- Time: 2.619 ms