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
);
  }
  root.callbackPriority = newCallbackPriority;
  root.callbackNode = newCallbackNode;
}
 This is the entry point for every concurrent task, i.e. anything that
 goes through Scheduler.
function performConcurrentWorkOnRoot(root, didTimeout) {
  if (enableProfilerTimer && enableProfilerNestedUpdatePhase) {
    resetNestedUpdateFlag();
  }
   Since we know we're in a React event, we can clear the current
   event time. The next update will compute a new event time.
  currentEventTime = NoTimestamp;
  currentEventTransitionLane = NoLanes;
  if ((executionContext & (RenderContext | CommitContext)) !== NoContext) {
    throw new Error('Should not already be working.');
  }
   Flush any pending passive effects before deciding which lanes to work on,
   in case they schedule additional work.
  const originalCallbackNode = root.callbackNode;
  const didFlushPassiveEffects = flushPassiveEffects();
  if (didFlushPassiveEffects) {
     
     
    if (root.callbackNode !== originalCallbackNode) {
       
       
       
      return null;