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
}
        completedWork.actualDuration = actualDuration;
      }
      if (returnFiber !== null) {
         
        returnFiber.flags |= Incomplete;
        returnFiber.subtreeFlags = NoFlags;
        returnFiber.deletions = null;
      } else {
         
        workInProgressRootExitStatus = RootDidNotComplete;
        workInProgress = null;
        return;
      }
    }
    const siblingFiber = completedWork.sibling;
    if (siblingFiber !== null) {
       
      workInProgress = siblingFiber;
      return;
    }
     
    completedWork = returnFiber;
     
    workInProgress = completedWork;
  } while (completedWork !== null);
   
  if (workInProgressRootExitStatus === RootInProgress) {
    workInProgressRootExitStatus = RootCompleted;
  }