On Mon, Aug 6, 2018 at 12:45 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > Ah, gotcha. But whether the behavior is sane or not, it'd be reproducible > for any specific input dataset on any specific platform (unless you've got > a quicksort that actually uses randomized pivots; but ours doesn't, and > I think that pg_dump does use src/port/qsort.c). So that partially > answers Andrew's question as to why we've not seen instability in the > buildfarm's results.
I completely missed that the qsort in use was part of libpgport; that should make it much easier to repro. We'll give it a shot. Thanks, --Jacob
