使用 angular-cli 命令 ng-serve 运行 angular2 应用程序时，我遇到以下问题
仪表板@0.0.0开始C：\ Users \ padmavathi \ Downloads \ phototype-development \ web \仪表板ng服务
Cannot read property 'length' of undefined
TypeError: Cannot read property 'length' of undefined
at createSourceFile (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\typescript\lib\typescript.js:8980:109)
at parseSourceFileWorker (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\typescript\lib\typescript.js:8940:26)
at Object.parseSourceFile (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\typescript\lib\typescript.js:8899:26)
at Object.createSourceFile (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\typescript\lib\typescript.js:8727:29)
at new TypeScriptFileRefactor (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\@ngtools\webpack\src\refactor.js:25:35)
at Object.resolveEntryModuleFromMain (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\@ngtools\webpack\src\entry_resolver.js:108:18)
at AotPlugin._setupOptions (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\@ngtools\webpack\src\plugin.js:129:58)
at new AotPlugin (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\@ngtools\webpack\src\plugin.js:37:14)
at Object.exports.getWebpackNonAotConfigPartial (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\angular-cli\models\webpack-build-typescript.js:20:13)
at new NgCliWebpackConfig (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\angular-cli\models\webpack-config.js:23:42)
at Class.run (C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\angular-cli\tasks\serve-webpack.js:20:22)
at C:\Users\padmavathi\Downloads\phototype-development\web\dashboard\node_modules\angular-cli\commands\serve.js:102:26
at process._tickCallback (internal/process/next_tick.js:103:7)
npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\Program …