Passing a bad HOST causes the port check to fail #2179

env HOST=nono npm start

? Something is already running on port 3000.
Would you like to run the app on another port instead? (Y/n) 

/Users/gaearon/p/create-react-app/packages/react-scripts/scripts/start.js:17
  throw err;
  ^

RangeError: "port" argument must be >= 0 and < 65536
    at assertPort (internal/net.js:17:11)
    at Server.listen (net.js:1382:5)
    at Server.listen (/Users/gaearon/p/create-react-app/packages/react-scripts/node_modules/webpack-dev-server/lib/Server.js:431:47)
    at run (/Users/gaearon/p/create-react-app/packages/react-scripts/scripts/start.js:133:13)
    at inquirer.prompt.then.answer (/Users/gaearon/p/create-react-app/packages/react-scripts/scripts/start.js:171:9)