Comment #1 on issue 1082 by tu...@tudorgirba.com: Inconsistent inspector variables values http://code.google.com/p/moose-technology/issues/detail?id=1082
As far as I understand, your expectation would be that the instance variables be provided in the evaluator. This is not the case right now, because we wanted to keep things simple. At this moment, we only have "self" bound to a value, and nothing else. Hence, when you will print an instance variable it will appear as undefined.
It is still a thing we are thinking about, though, but we are talking about a feature, not a bug.