No tests? :)

That's why it reads "WIP" ;)

Tests added, could someone comment on whether the XIncref there is correct? I take it GetInstHandle doesn't increase the ref-count by itself?

@filmor you can always stress-test for memory growth of this exception in a for-loop.

Looks like it is NOT needed to call XIncref like in this case:

Note that PyObject(IntPtr tp) constructor does not incref the ref. count.

@denfromufa @vmuriart @tonyroberts Please review.

I don't think an incref is necessary as the CLRObject constructor creates a new python object (so reference count of 1) and never decrefs it.

Yep, changed that already.