Maybe you will have advice to get the current selection? I am very worried about performance. Since the addon will work all the time in the background.

OK. This is another addon. But he has the same problem.

I would be happy to give an example of how to transfer the coordinates of a real object, rather than enter them manually.
https://docs.blender.org/api/blender2.8/gpu.html#wireframe-cube-using-index-buffer

That's exactly what I did. But it's jumping with a tambourine
http://pasteall.org/390855/python

Seems to be a clash of when face of object 1 is on the same plane as a face of object 2.

All right. I'm on this and reported a bug

I get a fall if I use my configuration. With standard settings works well.
Thank you.

You managed to reproduce the error?

Hellow. I managed to find sequence that leads to a fall.

1. select mesh "ClipboardObj v1.001_retopo_mesh_retopo_mesh.001"
2. select edge http://take.ms/tmkHs
3. A bevel (Ctrl+B)
4. set the bevel sigment = 3
5. set obj. mode
6. undo (Ctrl+Z)

Sorry.
The maximum that I can record a video up to the moment until I get fall. No longer can not give any information.

Hi. I give you my config folder and the scene that often falls.

I've been testing, I disabled all addons and set the standard render settings.

I'm not asking for help, I only report the program crashes.
The program crashes completely impossible to predict.
The only thing that can be added to the above is that I use "Custom Setup Blender | Silo/Maya"
link on config

again the same error