node build/dev-server.js

/arno/ChatDemo/build/dev-server.js:40
log: () => {}
^
SyntaxError: Unexpected token )
at Module._compile (module.js:439:25)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
at startup (node.js:119:16)
at node.js:902:3

npm ERR! [email protected] dev: node build/dev-server.js
npm ERR! Exit status 8
npm ERR!
npm ERR! Failed at the [email protected] dev script.
npm ERR! This is most likely a problem with the vue-qq package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node build/dev-server.js
npm ERR! You can get their info via:
npm ERR! npm owner ls vue-qq
npm ERR! There is likely additional logging output above.
npm ERR! System Linux 3.10.0-514.21.2.el7.x86_64
npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "run" "dev"
npm ERR! cwd /arno/ChatDemo
npm ERR! node -v v0.10.26
npm ERR! npm -v 1.4.3
npm ERR! code ELIFECYCLE
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /arno/ChatDemo/npm-debug.log
npm ERR! not ok code 0
这是什么原因？