message: Turn on noEmitOnError
diff: "alwaysStrict": true,
  "strictNullChecks": true,
  "noFallthroughCasesInSwitch": true,
  - "noEmitOnError": false,
  + "noEmitOnError": true,
  "noEmit": true,
  "inlineSourceMap": true,
  "inlineSources": true,
  