node-phantom, phantom.js crash.

package.json

{
  "name": "node-phantom-test",
  "version": "0.0.1",
  "private": true,
  "dependencies": {
    "node-phantom": "~0.2.5",
    "phantomjs": "~1.9.2-6"
  }
}

sample.js

var phantom = require('node-phantom'), phantomPath = require('phantomjs').path;
var url = 'http://docs.sencha.com/extjs/4.2.1/';
console.log(phantomPath);
phantom.create(function (err, ph) {
  return ph.createPage(function (err, page) {
    return page.open(url, function (err, status) {
      console.log("opened site? ", status);
      return page.evaluate(function () {
        return navigator.userAgent;
      }, function (err, result) {
        console.log(result);
        ph.exit();
      });
    });
  });
}, { phantomPath:phantomPath } );