<button class="weui-btn mini-btn" type="primary" open-type="getUserInfo" bindgetuserinfo="getUserInfo">允许登录</button>

getUserInfo: function (e) {

var userInfo = e.detail.userInfo;

wx.setStorageSync('avatar_url', userInfo.avatarUrl);//用户授权账号登录，这个地方偶尔报如下错误，不知道何故

}

===============================================

Cannot read property 'avatarUrl' of undefined;at App login function;at api login success callback function

TypeError: Cannot read property 'avatarUrl' of undefined

at success (https://miniprogram:///app.js:218:50)

at Function.o.<computed> (https://lib/WASubContext.js:2:1269189)

at y (https://lib/WASubContext.js:2:409283)

at v (https://lib/WASubContext.js:2:409526)

at https://lib/WASubContext.js:2:411075