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

In package.json I changed:

"devDependencies": {
   "@angular/cli": "1.0.0"

To:

"devDependencies": {
   "@angular/cli": "1.2.0"