mongodb/node-mongodb-native — pull request #1211 by taterbase (2014-09-24 19:24:11+00:00)
Title: Don't call the undefined callback handler

There seems to be some weird code that made its way into the driver. Other concerning code bits are at https://github.com/mongodb/node-mongodb-native/blob/master/lib/mongodb/collection/commands.js#L115-L117