Cannot read property 'length' of undefined
TypeError: Cannot read property 'length' of undefined
On the locale, I run no errors on the server such an error after the command
$ ./node_modules/@angular/cli/bin/ng test --single-run=true --browsers PhantomJS --watch=false Cannot read property 'length' of undefined TypeError: Cannot read property 'length' of undefined
at createSourceFile (/front/node_modules/typescript/lib/typescript.js:15457:109) at parseSourceFileWorker (/front/node_modules/typescript/lib/typescript.js:15389:26) at Object.parseSourceFile (/front/node_modules/typescript/lib/typescript.js:15338:26) at Object.createSourceFile (/front/node_modules/typescript/lib/typescript.js:15192:29) at VirtualFileStats.getSourceFile (/front/node_modules/@ngtools/webpack/src/compiler_host.js:66:35) at WebpackCompilerHost.getSourceFile (/front/node_modules/@ngtools/webpack/src/compiler_host.js:213:38) at findSourceFile (/front/node_modules/typescript/lib/typescript.js:67909:29) at processImportedModules (/front/node_modules/typescript/lib/typescript.js:68056:25) at findSourceFile (/front/node_modules/typescript/lib/typescript.js:67937:17) at processImportedModules (/front/node_modules/typescript/lib/typescript.js:68056:25) at findSourceFile (/front/node_modules/typescript/lib/typescript.js:67937:17) at processImportedModules (/front/node_modules/typescript/lib/typescript.js:68056:25) at findSourceFile (/front/node_modules/typescript/lib/typescript.js:67937:17) at processSourceFile (/front/node_modules/typescript/lib/typescript.js:67840:27) at processRootFile (/front/node_modules/typescript/lib/typescript.js:67728:13) at /front/node_modules/typescript/lib/typescript.js:67018:60 