微信小程序BUG复现(Expected updated data but get first rendering data)
操作步骤：
1.首页点击“进入tab页调用自定义组件”
2.点击“加载自定义组件”
3.点击“进入下一页再点后退”
4.点击“返回上一步”(使用的wx.switchTab)
此时即抛出错误：
渲染层错误
Expected updated data but get first rendering data
渲染层错误
webviewScriptError
Expected updated data but get first rendering data;Expected updated data but get first rendering data
Error: Expected updated data but get first rendering data
at m (http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:20:26427)
at http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:20:25581
at http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:20:30469
at c.<anonymous> (http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:3:25976)
at c.emit (http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:4:15192)
at http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:5:24301
at e.(anonymous function) (http://127.0.0.1:50022/__pageframe__/__dev__/WAWebview.js:5:8674)
at d (http://127.0.0.1:50022/__pageframe__/pageframe.html:17:2409)
at f.a.registerCallback (http://127.0.0.1:50022/__pageframe__/pageframe.html:17:2557)
at m.forEach (http://127.0.0.1:50022/__pageframe__/pageframe.html:17:858)作为比对，如果自定义组件是在普通页面调用，其他处理逻辑完全相同，则不会报错。 操作步骤：
1.首页点击“进入普通页调用自定义组件”
2.点击“加载自定义组件”
3.点击“进入下一页再点后退”
4.点击“返回上一步”(使用的wx.navigateTo)