Ok, I believe I've got the latest ucrtbased now on the Win7 buildbot (validate_ucrtbase.py reports it as 10.0.15063.137). It appears as if my Win8 and Win10 buildbots also have the older dll, so I'm guessing they're just fast enough or lucky enough not to run into the issue. I'll plan on addressing them in the near future as well.
Yeah, there were a few transient build errors while I was getting the buildbot back online. My initial attempt to fix this ticket involved using the VS 2015 installer which turned out very badly, so I had to fall back to an older VM image and start over. But the older image had an older buildbot version which didn't work with the git workflow, which hit a few pending builds before I got it fixed. I'm not yet sure if there may be some other fallback (e.g., the link error in the recent 3.x build seems familiar but I can't recall why offhand)
> Yeah, there were a few transient build errors while I was getting the buildbot back online Oh ok, I understand that the issue is already fixed. Thanks :-)