https://codesandbox.io/s/elastic-mayer-rzz4h2?file=/package.json

This is supposed to `console.error` but it doesn't.

17 warns: https://codesandbox.io/s/admiring-minsky-sze07m?file=/src/App.js
Returns whether passive effects were flushed.
   TODO: Combine this check with the one in flushPassiveEFfectsImpl. We should
   probably just combine the two functions. I believe they were only separate
   in the first place because we used to wrap it with
   `Scheduler.runWithPriority`, which accepts a function. But now we track the
   priority within React itself, so we can mutate the variable directly.
  if (rootWithPendingPassiveEffects !== null) {
     C
     f
    const root = rootWithPendingPassiveEffects;
     C
     m
     w
    const remainingLanes = pendingPassiveEffectsRemainingLanes;
    pendingPassiveEffectsRemainingLanes = NoLanes;
    const renderPriority = lanesToEventPriority(pendingPassiveEffectsLanes);
    const priority = lowerEventPriority(DefaultEventPriority, renderPriority);