明明是一个数组，为什么用不了map方法

问题遇到的现象和发生背景

问题相关代码，请勿粘贴截图

export default class Show extends Component {
constructor(props) {
super(props)
this.state = {
name: "",
msg: "",
info: [],

    }

}
render() {
    return (
        <div >
            {/* 父组件像子组件传递一个函数 */}
            <Msg car={(val1, val2) => this.car(val1, val2)}></Msg>
            <hr />

            {
                this.state.info.map((item, index) => {
                    return (
                        <div className="Show" key={item}>
                            <p>昵称：{item.name}</p>
                            <p>留言: {item.msg}</p>
                            <button className="del">删除</button>
                        </div>
                    )
                })
            }


        </div>
    )
}
car(val1, val2) {
    let arr = this.state.info
    arr.push({ name: val1, msg: val2 })
    // arr.includes(val2)?arr.splice(arr.indexOf(val2)):arr.push(val2)
    this.setState({
        info: arr
    })
    console.log(this.state.info)
}

}

运行结果及报错内容

Uncaught Error: Objects are not valid as a React child (found: object with keys {name, msg}). If you meant to render a collection of children, use an array instead.