Re: BUG #17255: Server crashes in index_delete_sort_cmp() due to race condition with vacuum

On Thu, Nov 18, 2021 at 4:36 PM Andres Freund <andres@anarazel.de> wrote:
> Attached is such an isolationtest. In an unmodified HEAD it ends up with

> without amcheck detecting corruption at that point:(.

The best way to teach amcheck to detect this kind of thing is bound to
be verification of HOT chains themselves:

https://www.postgresql.org/message-id/flat/CAH2-Wznphpd490o%2Bur_bi6-YmC47hRu3Qyxod72RLqC-Uvuhcg%40mail.gmail.com

It would also be nice to teach verify_nbtree.c to look out for the
presence of index tuples that shouldn't be there during heapallindexed
verification, but that's significantly harder.

--
Peter Geoghegan