总是报错, Cannot read property 'emit' of undefined;at setTimeout callback function
要怎么调试? 找不到问题源头
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Cannot read property 'emit' of undefined;at setTimeout callback function
TypeError: Cannot read property 'emit' of undefined
at Function.<anonymous> (https://usr/app-service.js:1103:3415)
at Function.<anonymous> (https://lib/WASubContext.js:2:92781)
at https://lib/WASubContext.js:2:99031
TypeError: Cannot read property 'emit' of undefined
提示改问题的原因是因为微信基础库的问题，当前手机的基础库是2.16.1，它无法识别找出改函数方法。请假官方应该怎么解决？
麻烦提供能复现问题的代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）