ID 603282 - The kSelectionChanged event can trigger while Nuke Studio is in the process of closing, which can cause crashes

Problem summary:
The kSelectionChanged event can trigger while Nuke Studio is in the process of closing, which can cause crashes
 
Customer reported version:
Nuke Studio N/A
 
Customer reported platform:
N/A
 
Steps to reproduce:
1) Launch Nuke Studio and execute the following code in the Script Editor:

from hiero.core import events def on_selection_changed(event):     nuke.tprint("selection changed") events.registerInterest("kSelectionChanged/kTimeline", on_selection_changed)

2) Navigate to File > Import File(s)... and select some media to import
3) Drag and drop the media onto the Timeline
4) With Soft-Selection enabled, move the Playhead off of the Track Item, then back onto the Track Item 
5) Open the Terminal, and observe how two selection events occurred as expected:

6) Navigate to File > Quit (when prompted, you may chose to save or not save the project)
7) Open the Terminal, and observe how a third kSelectionChanged event has occurred during shutdown, despite the selection not changing:

 
 
Expected behavior:
kSelectionChanged events should only fire when the selection has changed.
 
Actual behavior:
When Nuke Studio is closed via File > Quit or the exit button, it is possible for kSelectionChanged events to activate. If the function(s) registered to the kSelectionChanged event make adjustments inside the Nuke Studio project file, Nuke Studio can then crash during the shutdown process.