getaddrinfo omits IPv6 info on macOS, Windows runners

[jaraco]

Description
In this run based on this minimal repro, I run a simple command that emits the result of the lookup of an internet name and asserts that it has IPv6 results:

python -c "import socket, pprint; pprint.pprint(socket.getaddrinfo('jaraco.com', None)); assert any(':' in item[4][0] for item in socket.getaddrinfo('jaraco.com', None))"

This command passes on Linux, but fails on macOS 10.15 and Windows 2019. The same command passes on my local macOS workstation (10.15 and 11.2) and Windows workstation a decade ago.

Area for Triage:
Area: Apple
Area: Containers
Area: Python

Question, Bug, or Feature?:
Bug

Virtual environments affected

• Ubuntu 16.04
• Ubuntu 18.04
• Ubuntu 20.04
• macOS 10.15
• macOS 11.0
• Windows Server 2016 R2
• Windows Server 2019

Image version
macos-latest, windows-latest

Expected behavior
The image should have IPv6 enabled and be able to resolve names to IPv6 addresses on Python.

Actual behavior
IPv6 support appears to be incomplete.

[vsafonkin]

Hi @jaraco, unfortunately, I don't know something about python' socket module implementation, but GitHub hosted runners are not supporting IPv6 at the moment: #668

[jaraco]

In this case, I’m not even looking for IPv6 connectivity, only for the OS to have a functional IPv6 stack and to resolve IPv6 addresses over IPv4.

I don’t think the referenced issue is relevant because it’s about Linux and my tests pass on Linux runners. Also, that issue is closed.

is there a feature request thread I can follow where this deficiency can be tracked until it’s addressed?

[vsafonkin]

@jaraco , I'm afraid there are no any threads to track it.