> This can crash at line:414, if either tuple is invalid memory(but I > think it's not because we have already accessed this memory in above > if check) or dtup is invalid (this is also not possible because > brin_new_memtuple has already accessed this).
I was testing with the brin correlation patch  applied. I cannot crash it without the patch either. I am sorry for not testing it before. The patch make BRIN selectivity estimation function access more information.  https://www.postgresql.org/message-id/attachment/50164/brin-correlation-v3.patch -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers