Message 216120 - Python tracker

> 3.3 is in security-fix only mode.

Yeah, but this is a core language bug. I believe some people may be stuck on 3.3 with broken 'yield from' for whatever reason, which will cause hard to find bugs in 3.3 compatible libraries (like asyncio/tulip).  I think we can lift the security-only restriction for this specific patch, no?