grunt-contrib-watch: Watch Error: FSEventStreamFlushSync(): failed assertion

I am getting the following error after Running "watch" task restarts

2015-03-02 11:19 grunt[7732] (FSEvents.framework) FSEventStreamFlushSync(): failed assertion '(SInt64)last_id > 0LL'

Happens with these versions:

$ node 0.11.6 - 0.12.0
$ npm 2.5.1

Related Grunt Config:

...
watch: {
  sass: {
    files: [
      '<%= configs.sassPaths.answ_sass + configs.minimatch %>',
      '<%= configs.sassPaths.sass_lib + configs.minimatch %>'
    ],
    options: {
      nospawn: true
    }
  }
}
...