BRIN index WAL is broken in HEAD. Commit 2c03216d831160bedd72d4, the Revamp the WAL record format, is the culprit.
The easiest way to see this is via streaming replication. On master: create table foobar as select * from generate_series(1,10000); create index on foobar using brin (generate_series ); On replica: set enable_seqscan TO off; explain (analyze) select count(*) from foobar ; ERROR: corrupted BRIN index: inconsistent range map Cheers, Jeff