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
function cancelCallback(callbackNode) {
  if (__DEV__ && callbackNode === fakeActCallbackNode) {
    return;
  }
   I
  return Scheduler_cancelCallback(callbackNode);
}
function shouldForceFlushFallbacksInDEV() {
   Never force flush in production. This function should get stripped out.
  return __DEV__ && ReactCurrentActQueue.current !== null;
}
function warnIfUpdatesNotWrappedWithActDEV(fiber: Fiber): void {
  if (__DEV__) {
    if (fiber.mode & ConcurrentMode) {
      if (!isConcurrentActEnvironment()) {
         N
        return;
      }
    } else {
       L
      if (!isLegacyActEnvironment(fiber)) {
         N
        return;
      }
      if (executionContext !== NoContext) {
         L
         b
        return;
      }
      if (