text: Input::
  //// [/a/app.ts]
  let x = 1
  
  //// [/a/tsconfig.json]
  {"compiler":{},"files":[]}
  
  //// [/a/node_modules/@types/typings/index.d.ts]
  export * from "./lib"
  
  //// [/a/node_modules/@types/typings/lib.d.ts]
  export const x: number
  
  //// [/a/lib/lib.d.ts]
  /// <reference no-default-lib="true"/>
  interface Boolean {}
  interface Function {}
  interface CallableFunction {}
  interface NewableFunction {}
  interface IArguments {}
  interface Number { toExponential: any; }
  interface Object {}
  interface RegExp {}
  interface String { charAt: any; }
  interface Array<T> { length: number; [n: number]: T; }
  
  
  /a/lib/tsc.js -w -p /a/tsconfig.json
  Output::
  >> Screen clear
  [[90m12:00:23 AM[0m] Starting compilation in watch mode...
  
  [96mtsconfig.json[0m:[93m1[0m:[93m24[0m - [91merror[0m[90m TS18002: [0mThe 'files' list in config file '/a/tsconfig.json' is empty.
  
  [7m1[0m {"compiler":{},"files":[]}
  [7m [0m [91m                       ~~[0m
  
  [[90m12:00:24 AM[0m] Found 1 error. Watching for file changes.
  
  
  
  Program root files: []
  Program options: {"watch":true,"project":"/a/tsconfig.json","configFilePath":"/a/tsconfig.json"}
  Program files::
  
  No cached semantic diagnostics in the builder::
  
  WatchedFiles::
  /a/tsconfig.json:
    {"fileName":"/a/tsconfig.json","pollingInterval":250}
  
  FsWatches::
  
  FsWatchesRecursive::
  /a/node_modules/@types:
    {"directoryName":"/a/node_modules/@types","fallbackPollingInterval":500,"fallbackOptions":{"watchFile":"PriorityPollingInterval"}}
  
  exitCode:: ExitStatus.undefined
  
  