Re: Segmentation fault with PG-12

On 2019-10-09 10:16:37 -0400, Tom Lane wrote:
> Andreas Joseph Krogh <andreas(at)visena(dot)com> writes:
> > Attached is output from "bt full". Is this helpful?
>
> Well, it shows that the failure is occurring while trying to evaluate
> a variable in a trigger's WHEN clause during
> "UPDATE origo_email_delivery SET folder_id=$1, created=$2\nWHERE entity_id IN ($3)\nRETURNING entity_id"
> And I'd bet that the root cause is something to do with Andres' tuple slot
> work. But (at least to my eye) it's not apparent exactly what's wrong.

It looks like this could "just" be another report of #16036, which was
already fixed in:

commit d986d4e87f61c68f52c68ebc274960dc664b7b4e
Author: Andres Freund <andres(at)anarazel(dot)de>
Date: 2019-10-04 11:59:34 -0700

Fix crash caused by EPQ happening with a before update trigger present.

> This doesn't seem to correlate with your original report, btw,
> as that claimed the crash was during COMMIT.

That however, would be confusing, unless there's some deferred trigger
that causes another update, which then fires a before update trigger
causing the problem.

Greetings,

Andres Freund