[Distutils] PEP 517 again

[Donald Stufft]

The thing being bubbled up is a backend accidentally calling an API that has yet to be implemented (an error that should be reported) being bubbled up and erroneously handled as the backend reporting it doesn't support making a sdist (not an error, son no traceback). 

Sent from my iPhone

> On Aug 25, 2017, at 2:23 PM, Paul Moore <p.f.moore at gmail.com> wrote:
> 
> There's little or no opportunity here for letting exceptions bubble up
> to the user, or passing complex data back to the frontend. Ultimately,
> it's pretty much immaterial which form of reporting is used.