Hanging nextObject() call

hanging_nextobject

// MongoDB 2.6, Linux Mint 17.1, node driver HEAD

/* Output looks like:
```
nextObject returned
Calling nextObject again...
Calling execGetMore
```

The `console.log('second nextObject returned');` line never gets executed and the program exits because of no listeners
*/

var mongodb = require('mongodb');

mongodb.MongoClient.connect('mongodb://localhost:27017', function(error, db) {
  if (error) {
    throw error;
  }

  db.collection('test').insert({ x: 1 }, function(error) {
    if (error) {
      throw error;
    }

    db.collection('test').insert({ x: 2 }, function(error) {
      if (error) {
        throw error;
      }

      db.collection('test').find({}, {batchSize: 2}, function(error, cursor) {
        if (error) {
          throw error;
        }

        cursor.nextObject(function(error, obj) {
          if (error) {
            throw error;
          }

          db.close();
          cursor.nextObject(function(error, obj) {
            console.log('nextObject returned');
            if (error) {
              throw error;
            }

            console.log('Calling nextObject again...');
            cursor.nextObject(function(error, obj) {
              console.log('second nextObject returned');
              if (error) {
                throw error;
              }
            });
          });
        });
      });
    });
  });
});