Re: TupleDescAttr bounds checks

Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Fri, Mar 20, 2026 at 12:22 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> I had just come to the same conclusion about why grison is failing.

> Hmm, I had a rougher version of this analysis (and an analysis of some
> the other failures) on an email I sent yesterday on the pg_plan_advice
> thread. Based on this email and another one you sent, I'm guessing you
> either didn't see that email or maybe even didn't get a copy of it for
> some reason.

I did see that, but it read to me that you were just guessing at that
time. This morning I put Asserts into indexcmds.c that verified that
it was trying to access the tupledesc for attno zero, and that proves
there is a bug there. It also seems like a plausible explanation for
why only one machine has exhibited the failure. (Your 0002 is a
better version of said Asserts.)

regards, tom lane