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
workInProgressRoot !== null &&
    (fiber.mode & ConcurrentMode) !== NoMode &&
     
     
     
     
    (deferRenderPhaseUpdateToNextBatch ||
      (executionContext & RenderContext) === NoContext)
  );
}
 Use this function to schedule a task for a root. There's only one task per
 root; if a task was already scheduled, we'll check to make sure the priority
 of the existing task is the same as the priority of the next level that the
 root has work on. This function is called on every update, and right before
 exiting a task.
function ensureRootIsScheduled(root: FiberRoot, currentTime: number) {
  const existingCallbackNode = root.callbackNode;
   
   
  markStarvedLanesAsExpired(root, currentTime);
   
  const nextLanes = getNextLanes(
    root,
    root === workInProgressRoot ? workInProgressRootRenderLanes : NoLanes,
  );
  if (nextLanes === NoLanes) {
     
    if (existingCallbackNode !== null) {