I don't know if this is affecting other distributions but in Void Linux eudev fails to start since this commit. I found this by doing a git bisect between 533d602 (good) and a1b5990 (bad) and came up with this commit as where the regression was introduced.
I haven't managed to narrow it down as there is a lot going on in this commit. Do you have any ideas what it might be? eudev udevd doesn't provide much information unfortunately to help debug the issue.
I confirm this issue happens on both BE and OGS devices with both the new and old kernel.
https://github.com/gentoo/eudev