node js 에러가 발생할 경우

SyntaxError: Unexpected token ...

    at createScript (vm.js:56:10)

    at Object.runInThisContext (vm.js:97:10)

    at Module._compile (module.js:549:28)

    at Object.Module._extensions..js (module.js:586:10)

    at Module.load (module.js:494:32)

    at tryModuleLoad (module.js:453:12)

    at Function.Module._load (module.js:445:3)

    at Module.require (module.js:504:17)

    at require (internal/module.js:20:19)

    at Object.<anonymous> (/home/centos/node_modules/ws/index.js:3:19)