The `rel` reading Bryan decided landed, and with it a defect the retained
machinery had all along: a span that can overflow itself makes the two asks'
boxes differ far enough that a reused answer is read before the subtree
under it has settled.
Widening the fuzzers to 2000 seeds at depth 4 then found two warm/cold
divergences that predate both commits, so the branch is not correct and the
routine verification does not say otherwise. They lead "Next".