Thanks for investigating this, Noah.
On Thu, 8 Oct 2020 at 06:13, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>
> Noah Misch <noah@leadboat.com> writes:
> > gram.o was it. (The way I rebuilt gram.o also rebuilt parser.o and scan.o,
> > but those seem far less likely.)
>
> This suggests that the problem is misoptimization of gram.y's
> makeOrderedSetArgs:
It would be interesting to see gram.s from both cc99baa4~1 and cc99baa4.
David