QML: Note::accidental() always returns 'undefined'

This is a developer question: (I hope this is not the wrong place to ask this)
Calls to Note::accidental() method inside a qml plugin always return 'undefined'. However, looking at the Note object with qdb debugger, says that Note::_accidental is not always 0x00.
You can try using the plugin I attached. It shows some information on every note in the current score. Use a score with some notes, and add an accidental to at least one note. This note should have a valid pointer to an Accidental object.
AFAIK Segment::measure() is quite similar to Note::accidental(): They both return a pointer. Therefore the plugin also prints out the result of Segment::measure(). And it gets valid pointers from this method.
I'm using build cc3e8e4 on Ubuntu 12.04