11.1-RELEASE-p10 cannot compile freebsd stable/11 kernel?

[Mike Karels]

[details omittied]
> > I know that clang has been updated a lot; has the kernel source gotten
> > ahead of clang on stable/11?
> On stable/11 they are in sync.  The official method of upgrade is
> 	make buildworld buildkernel
> from older version takes care of the compiler version transparently.
> If you use config/make, ensure that the installed world is at the
> compatible level for the kernel sources.

So the freebsd-update version is not in sync with the -stable branch?
That was not at all obvious to me.  I upgrade from source on my -current
test system, but normally use freebsd-update on my production systems
(until it failed to update the kernel).

		Mike