On Wed, May 19, 2021 at 11:34 AM Thomas Munro <thomas.munro@gmail.com> wrote:
> I don't understand any of this stuff at all, but I added a bunch of
> printfs and worked out that the first point its local variables
> diverge is here:
>
> /* Random offset */
> r = (uint64) getrand(&random_state2, 0, size - 1);
Forgot to post the actual values:
r = 2563421694876090368
r = 2563421694876090365
Smells a bit like a precision problem in the workings of pg_erand48(),
but as soon as I saw floating point numbers I closed my laptop and ran
for the door.