iphone7打开小程序只显示导航栏，页面空白？

你好，麻烦提供出现问题的具体机型、微信版本号、系统版本号，以及能复现问题的代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）

手机型号：iphone7；

微信版本号：7.0.19；

系统版本号：iOS 10.1.1；

报错代码：

MiniProgramError

SyntaxError

at line:3003,column:101185,SyntaxError: Cannot declare a let variable twice: 't'. Stack: (native code)

at evaluateScriptFile (WAServiceMainContext.js:2:101185)

at value (WAServiceMainContext.js:2:151098)

at (WAServiceMainContext.js:2:153811)

at forEach (native code)

at (WAServiceMainContext.js:2:153778)

at w (WAServiceMainContext.js:2:81487)

at s (WAServiceMainContext.js:2:81761)

at C (WAServiceMainContext.js:2:152765)

at (WAServiceMainContext.js:2:154348)

at (WAServiceMainContext.js:2:143858)

at (WAServiceMainContext.js:2:256225)

at (WAServiceMainContext.js:2:255210)

at forEach (native code)

at (WAServiceMainContext.js:2:255174)

at (WAServiceMainContext.js:2:256225)

at w (WAServiceMainContext.js:2:77751)

global code