LibVLC ExitCallback not firing on master

Summary

The libvlc exit callback allows to run some arbitrary code on libvlc exit. This is not currently working on LVS master (dunno for 3.x).

Minimal project and steps to reproduce

Run SetExitHandler unit test on master.

What is the current bug behavior?

Test pass.

What is the expected correct behavior?

The ExitCallback is never called.

Possible fixes

        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                UnsetDialogHandlers();
                Native.LibVLCLogUnset(NativeReference);
+              //_gcHandle.Free();
+              //_exitCallback = null;
                _log = null;
            }

            base.Dispose(disposing);
        }