警告：来自 useState() 和 useReducer() 钩子的状态更新不支持“ + ... MERN Stack Application

Question

为什么我的 setUser 在我 console.log 时返回那个警告？ :

function dispatchAction(fiber, queue, action) {
  {
    if (typeof arguments[3] === 'function') {
      error("State updates from the useState() and useReducer() Hooks don't support the " + 'second callback argument. To execute a side effect after ' + 'rendering, declare it in the component body with useEffect().');
    }
  }

功能如下：

const UserContextProvider = (props) => {
    const [user, setUser] = useState({})
    
    useEffect(() => {
        fetch(`${API}/auth/user`, {
            method: 'GET',
            withCredentials: true,
            credentials: 'include'
        })
        .then (response => response.json())
        .then (response => {
            setUser(response.user)
            console.log(setUser)
        })
        .catch (error => {
            console.error (error);
        });
    }, [setUser])

注意： response.user 只是一个对象。而且我可以在子组件中访问用户中的数据而没有问题。