【报Bug】项目引用mpvue-picker，直接编译报错！！！

详细问题描述

（DCloud产品不会有明显的bug，所以你遇到的问题大都是在特定环境下才能重现的问题，请仔细描述你的环境和重现方式，否则DCloud很难排查解决你的问题）

[内容]创建了一个uniapp的默认模板项目，空的项目，直接在浏览器中引用mpvue-picker，然后编译就报错了
21:46:35.988 Module build failed (from ./node_modules/vue-loader/lib/loaders/templateLoader.js):
21:46:35.989 TypeError: Cannot read property 'charAt' of undefined
21:46:36.001 at parseEvent (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\event.js:181:20)
21:46:36.003 at _processEvent (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\event.js:328:9)
21:46:36.022 at processEvent (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\event.js:387:5)
21:46:36.035 at processes.forEach.process (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\index.js:34:5)
21:46:36.049 at Array.forEach (<anonymous>)
21:46:36.060 at traverseData (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\index.js:33:13)
21:46:36.062 at Object.CallExpression (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\visitor.js:165:56)
21:46:36.073 at NodePath._call (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\path\context.js:53:20)
21:46:36.086 at NodePath.call (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\path\context.js:40:17)
21:46:36.099 at NodePath.visit (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\path\context.js:88:12)
21:46:36.112 at TraversalContext.visitQueue (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\context.js:118:16)
21:46:36.125 at TraversalContext.visitMultiple (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\context.js:85:17)
21:46:36.138 at TraversalContext.visit (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\context.js:144:19)
21:46:36.152 at Function.traverse.node (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\index.js:94:17)
21:46:36.168 at NodePath.visit (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\path\context.js:95:18)
21:46:36.182 at TraversalContext.visitQueue (E:\software\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\node_modules\@babel\traverse\lib\context.js:118:16)
21:46:36.196 ERROR Build failed with errors.

重现步骤

[步骤]

[结果]

[期望]

[如果语言难以表述清晰，拍一个视频或截图，有图有真相]

IDE运行环境说明

[HBuilder 或 HBuilderX。如果你用其他工具开发uni-app，也需要在此说明]
我是HBuilderX 2.2.0.20190810 创建的。

[windows版本号] win10

[mac版本号]

uni-app运行环境说明

联系方式

[QQ]308439802