Created attachment 539076 [details] sys-fs:udev-233:20180710-183228.log udev-233 fails to build for me. I found some similar build-fails in tracker Bug 637144, so I guess this one should be added to that tracker also. I'll attach the build-log and output from emerge --info '=sys-fs/udev-233::gentoo' Don't hesitate to ask for additional info if needed.
Created attachment 539078 [details] emerge-info.txt
Have you tried anything more recent than udev-233, and got the same error?
Please try a newer version of udev.
Oops, i had a mask on udev > 234 which I had forgotten. # Bootfail >=sys-fs/udev-234 I don't remember what the problem was, and I don't have any problem booting with sys-fs/udev-239 now. Thanks, and sorry. I should have checked my masks before reporting.