Jacob Champion <pchampion@pivotal.io> writes:
> On Mon, Aug 6, 2018 at 12:45 PM Tom Lane <tgl@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.
I don't see any reason to insist on a test case before pushing this
fix, so I did that. (As I expected, the fix doesn't change any existing
regression test results.)
regards, tom lane