That was a nasty one, but then again, my recommendation would still be to use `pg_repack` over reindex concurrently because that one also gets you concurrent clustering and that one was not affected by this bug.

I'm not downplaying the issue and index corruption is really bad, but I would wager a guess that admins who do need concurrent reindexing would also be aware of `pg_repack` and would prefer that anyways because of the other benefits it provides.

This is probably why it took 6 months for the issue to be reported and fixed.