[Python-Dev] No longer enable Py_TRACE_REFS by default in debug build

[Steve Dower]

On 09Apr2019 0925, Victor Stinner wrote:
> This change makes the debug build ABI closer to the release build ABI,
> but I am not sure how to compare these two ABI. Technically, C
> extensions still need to be recompiled.
> 
> What do you think?

What are the other changes that would be required? And is there another 
way to get the same functionality without ABI modifications?

I think it's worthwhile if we can really get to debug and non-debug 
builds being ABI compatible. Getting partway there in this case doesn't 
seem to offer any benefits.

Cheers,
Steve