超过最大更新。当重复调用componentWillUpdate或componentDidUpdate

Question

我没有使用组件做过更新，组件也会更新，当在返回jsx中使用受保护的私有路由时，我会向我显示错误，请帮助我，在另一个工作正常的模板中使用此代码

import React, { Component } from "react";
import firebase from "firebase";

import { Route, Redirect, Switch, BrowserRouter } from "react-router-dom";

import { firebaseInitialize } from "./views/Key/Config";
import "./App.scss";

 const loading = () => (
  <div className="animated fadeIn pt-3 text-center">Loading...</div>
 );

//容器

     const DefaultLayout = React.lazy(() => import("./containers/DefaultLayout"));

//页

 const Login = React.lazy(() => import("./views/Pages/Login"));
 const Register = React.lazy(() => import("./views/Pages/Register"));
 const Page404 = React.lazy(() => import("./views/Pages/Page404"));
 const Page500 = React.lazy(() => import("./views/Pages/Page500"));

  class Routes extends Component {
    constructor(props) {
        super(props);
     this.state = {
      user: {}
     };
   }

//侦听器，用于登录或注销用户状态

   componentDidMount() {
     this.authListener();
    }

   componentWillMount() {
      firebaseInitialize();
    }

//设置用户登录状态

   authListener() {
     firebase.auth().onAuthStateChanged(user => {
       if (user) {
        this.setState({ user });
        } else {
        this.setState({ user: null });
        }
     });
    }

   render() {
//if user loggedIn false redirect to landing "/"

    const PrivateRoute = ({ component: Component, ...rest }) => (
     <Route
     {...rest}
       render={props =>
       this.state.user ? <Component {...props} /> : <Redirect to="/login" 
           />
          }
        />
      );
//if user loggedIn true redirect to /dashboard

const ProtectedRoute = ({ component: Component, ...rest }) => (
  <Route
    {...rest}
    render={props =>
      !this.state.user ? (
        <Component {...props} />
      ) : (
        <Redirect to="/dashboard" />
      )
    }
  />
);

return (
  <BrowserRouter>
    <React.Suspense fallback={loading()}>
      <Switch>
        <PrivateRoute
          exact
          path="/login"
          name="Login Page"
          component={Login}
        />
        <Route
          exact
          path="/register"
          name="Register Page"
          render={props => <Register {...props} />}
        />
        <Route
          exact
          path="/404"
          name="Page 404"
          render={props => <Page404 {...props} />}
        />
        <Route
          exact
          path="/500"
          name="Page 500"
          render={props => <Page500 {...props} />}
        />

        <ProtectedRoute
          path="/"
          name="Home"
          render={props => <DefaultLayout {...props} />}
        />
      </Switch>
    </React.Suspense>
  </BrowserRouter>
  );
  }
}

导出默认路由；