r273918 buildworld broke at semaphore

[Beeblebrox]

>     Seems like your tree is not fully up to date?  The changes to
>     sem_new.c were
>     committed in the same commit as the changes to sys/umtx.h.

I deleted the entire contents of /usr/src, then did
# svn co svn://svn.freebsd.org/base/head
Buildworld breaks at same place (semaphore)

This error AFAIK, was already combined with:
http://freebsd.1045724.n5.nabble.com/r273910-build-failure-if-lt-sys-umtx-h-gt-is-out-of-date-td5961186.html

Speaking of "out-of-date",
http://freebsd.1045724.n5.nabble.com/version-number-error-with-ports-td5961642.html

Regards.