Cannot read property 'length' of undefined
TypeError: Cannot read property 'length' of undefined
    at createSourceFile (c:UsersAminaDesktopLendingTreenode_modulestypescriptlibtypescript.js:15457:109)
    at parseSourceFileWorker (c:UsersAminaDesktopLendingTreenode_modulestypescriptlibtypescript.js:15389:26)
    at Object.parseSourceFile (c:UsersAminaDesktopLendingTreenode_modulestypescriptlibtypescript.js:15338:26)
    at Object.createSourceFile (c:UsersAminaDesktopLendingTreenode_modulestypescriptlibtypescript.js:15192:29)
    at new TypeScriptFileRefactor (c:UsersAminaDesktopLendingTreenode_modules@ngtoolswebpacksrcrefactor.js:34:35)
    at Object.resolveEntryModuleFromMain (c:UsersAminaDesktopLendingTreenode_modules@ngtoolswebpacksrcentry_resolver.
js:105:20)
    at AotPlugin._setupOptions (c:UsersAminaDesktopLendingTreenode_modules@ngtoolswebpacksrcplugin.js:152:50)
    at new AotPlugin (c:UsersAminaDesktopLendingTreenode_modules@ngtoolswebpacksrcplugin.js:27:14)
    at _createAotPlugin (c:UsersAminaDesktopLendingTreenode_modules@angularclimodelswebpack-configstypescript.js:55:
12)
    at Object.exports.getNonAotConfig (c:UsersAminaDesktopLendingTreenode_modules@angularclimodelswebpack-configstyp
escript.js:71:19)
    at NgCliWebpackConfig.buildConfig (c:UsersAminaDesktopLendingTreenode_modules@angularclimodelswebpack-config.js:2
9:37)
    at Class.run (c:UsersAminaDesktopLendingTreenode_modules@angularclitasksserve.js:43:98)
    at check_port_1.checkPort.then.port (c:UsersAminaDesktopLendingTreenode_modules@angularclicommandsserve.js:114:26
)
    at process._tickCallback (internal/process/next_tick.js:109:7)

{
  "name": "lending-tree",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@agm/core": "^1.0.0-beta.1",
    "@angular/animations": "^4.2.4",
    "@angular/common": "^4.2.4",
    "@angular/compiler": "^4.2.4",
    "@angular/core": "^4.2.4",
    "@angular/forms": "^4.2.4",
    "@angular/http": "^4.2.4",
    "@angular/platform-browser": "^4.2.4",
    "@angular/platform-browser-dynamic": "^4.2.4",
    "@angular/router": "^4.2.4",
    "@types/googlemaps": "^3.29.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.4.2",
    "zone.js": "^0.8.14"
  },
  "devDependencies": {
    "@angular/cli": "1.3.1",
    "@angular/compiler-cli": "^4.2.4",
    "@angular/language-service": "^4.2.4",
    "@types/jasmine": "~2.5.53",
    "@types/jasminewd2": "~2.0.2",
    "@types/node": "~6.0.60",
    "codelyzer": "~3.1.1",
    "jasmine-core": "~2.6.2",
    "jasmine-spec-reporter": "~4.1.0",
    "karma": "~1.7.0",
    "karma-chrome-launcher": "~2.1.1",
    "karma-cli": "~1.0.1",
    "karma-coverage-istanbul-reporter": "^1.2.1",
    "karma-jasmine": "~1.1.0",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.1.2",
    "ts-node": "~3.2.0",
    "tslint": "~5.3.2",
    "typescript": "~2.3.3"
  }
}