Module build failed: TypeError: Cannot read property 'newLine' of undefined

Question

Everything was running fine yesterday, now when I try to ng serve I get these errors:

ERROR in ./src/main.ts Module build failed: TypeError

Answer 1

So none of the install @angular/cli@latest worked for me, most likely will work in the future I presume.

I had another angular2 project which was ng serve-ing fine. So I just copied the package.json dependencies from it and updated the angular-cli.json.

And now it works again!

package.json

"dependencies": {
    "@angular/common": "^2.4.0",
    "@angular/compiler": "^2.4.0",
    "@angular/core": "^2.4.0",
    "@angular/forms": "^2.4.0",
    "@angular/http": "^2.4.0",
    "@angular/platform-browser": "^2.4.0",
    "@angular/platform-browser-dynamic": "^2.4.0",
    "@angular/router": "^3.4.0",
    "core-js": "^2.4.1",
    "rxjs": "^5.0.1",
    "ts-helpers": "^1.1.1",
    "zone.js": "^0.7.2"
  },
  "devDependencies": {
    "@angular/cli": "1.0.0-beta.31",
    "@angular/compiler-cli": "^2.4.0",
    "@types/jasmine": "2.5.38",
    "@types/node": "^6.0.42",
    "codelyzer": "~2.0.0-beta.1",
    "css-loader": "^0.26.1",
    "jasmine-core": "2.5.2",
    "jasmine-spec-reporter": "2.5.0",
    "karma": "1.2.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-coverage-istanbul-reporter": "^0.2.0",
    "karma-jasmine": "^1.0.2",
    "node-sass": "^4.5.0",
    "node-sass-import": "^1.1.1",
    "protractor": "~5.1.0",
    "sass-loader": "^6.0.0",
    "source-map-loader": "^0.1.6",
    "ts-node": "1.2.1",
    "tslint": "^4.3.0",
    "typescript": "~2.0.0"
  }

angular-cli.json

Had to revert back to the older type of "source" key

"environments": {
    "source": "environments/environment.ts",
    "dev": "environments/environment.ts",
    "prod": "environments/environment.prod.ts"
}