Re: Segmentation fault with PG-12

På torsdag 10. oktober 2019 kl. 21:32:38, skrev Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us
<mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us>>:
Andres Freund <andres(at)anarazel(dot)de> writes:
> On 2019-10-09 10:16:37 -0400, Tom Lane wrote:
>> 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.

Bingo. I can reproduce the crash (using concurrent updates of the same
table row, in the schema Andreas sent off-list) on the predecessor of
that commit, but on that commit it's fine.

That's great!

Andreas, that's a pretty simple patch if you're in a position to
build from source ...

regards, tom lane

Yes, we've built a new .deb-package from
f224c7c11ea7be2751e3342e11317070ffb5622d in REL_12_STABLE which we'll deploy
tonight.
Thanks!

--
Andreas Joseph Krogh