Created attachment 273181 [details]
accessible-event listener

Steps to reproduce:
1. Launch the attached accessible-event listener in a terminal
2. Launch gtk3-demo
3. With focus in the demo tree on the left, type "c"
4. Keep pressing Down Arrow to move to the next match

Expected results:
1. object:state-changed:selected events would only be emitted
   when an object's selected state actually changes.
2. the event's detail1 would match the state set

Actual results:
Everything works as expected until the selected item is the final result (in this case "Combo Boxes"). At this point, each time you press Down Arrow, there is a beep indicating that there are no more matches and thus selection is not changing. However:

1. Two object:state-changed:selected events are emitted for "Combo Boxes" each time you press Down Arrow and fail to move.

2. For every event where detail1 is 0 (event announcing the object is unselected), the object continues to have STATE_SELECTED present.

Sample output:
[table cell | Application Class] - event matches state: True
[table cell | Change Display] - event matches state: True
[table cell | Clipboard] - event matches state: True
[table cell | Color Chooser] - event matches state: True
[table cell | Combo Boxes] - event matches state: False
[table cell | Combo Boxes] - event matches state: True
[table cell | Combo Boxes] - event matches state: False
[table cell | Combo Boxes] - event matches state: True
[table cell | Combo Boxes] - event matches state: False
[table cell | Combo Boxes] - event matches state: True
[table cell | Combo Boxes] - event matches state: False
[table cell | Combo Boxes] - event matches state: True