[rudycelekli]

NaN compares unequal to itself and renews the progress deadline on every poll, preventing a stalled benchmark from timing out. Require finite numeric progress before renewing the deadline.

Validation: focused regression fails on baseline and passes fixed; related suites where present, frontend typecheck, style guard and production build pass. No backend or database tests were run.

[WaylandYang]

Thank you for going through the codebase this carefully. We are taking eight from this batch (#1140, #1143, #1147, #1148, #1157, #1163, #1166, #1168), each a behaviour someone using Utopia would hit.

We are closing this one: it guards against an input we have not seen in use, and we keep the code and its tests to what the product needs today. For the scripts under scripts/, CI runs only scripts/bench/lib.test.mjs, so the added tests would not run.

If you see this happen in a real deployment, please open an issue with the case and we will take it. For future sweeps, one issue listing the findings first would let us pick together before you write the fixes.

Thanks again for the time you put into this.