insert not running callback when database doesn't exist, but still works

[burtgummer45]

> db.dropDatabase()

 

Run the below code.  It will work but the first time it runs the callback is not called.  Is this a bug or just a funny mongodb thing?

var collection = mongo_db.collection('users');

collection.insert( { 'lastname': 'Gummer' }, function( err, result ) {                                                                     console.log( err );                                                                                                                     console.log( 'callback insert' );
} );