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
}
    }
    ensureRootIsScheduled(root, eventTime);
    if (
      lane === SyncLane &&
      executionContext === NoContext &&
      (fiber.mode & ConcurrentMode) === NoMode &&
       
      !(__DEV__ && ReactCurrentActQueue.isBatchingLegacy)
    ) {
       
       
       
       
       
      resetRenderTimer();
      flushSyncCallbacksOnlyInLegacyMode();
    }
  }
  return root;
}
export function scheduleInitialHydrationOnRoot(
  root: FiberRoot,
  lane: Lane,
  eventTime: number,
) {