Error: listen EAFNOSUPPORT

[SidKwok]

When run micro-dev -p 8080, error will come out:

events.js:183
      throw er; // Unhandled 'error' event
      ^

Error: listen EAFNOSUPPORT :::8080
    at Object._errnoException (util.js:1022:11)
    at _exceptionWithHostPort (util.js:1044:20)
    at Server.setupListenHandle [as _listen2] (net.js:1350:19)
    at listenInCluster (net.js:1408:12)
    at doListen (net.js:1517:7)
    at _combinedTickCallback (internal/process/next_tick.js:141:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)
    at Function.Module.runMain (module.js:695:11)
    at startup (bootstrap_node.js:188:16)
    at bootstrap_node.js:609:3

But micro -p 8081 is fine.