domain error handler + bind function

gistfile1.js

function User() {
  this.name = 'nanha';
}
var Nanha = new User();

var fs = require('fs');
var domain = require('domain').create();
domain.on('error', function(err) {
  console.log('=====');
  console.log(this);

}.bind(Nanha));

fs.readFile('./adsfasdf', domain.bind(function(err, data) {
  if (err) throw new Error(err);
}));