panic on boot

[AN]

FreeBSD FBSD11 11.0-CURRENT FreeBSD 11.0-CURRENT #47 r269949: Wed Aug 13 
14:18:28 EDT 2014     root at FBSD11:/usr/obj/usr/src/sys/MYKERNEL  amd64

Trying to rebuild the system at r270973
I get a kernel panic on boot.  I am able to boot into kernel.old at 
r269949 and the system is functional.  Is anyone else seeing a panic on 
boot at a recent svn update?

  [root at FBSD11 /usr/src]# svnlite info
Path: .
Working Copy Root Path: /usr/src
URL: svn://svn.freebsd.org/base/head
Relative URL: ^/head
Repository Root: svn://svn.freebsd.org/base
Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Revision: 270973
Node Kind: directory
Schedule: normal
Last Changed Author: kadesai
Last Changed Rev: 270973
Last Changed Date: 2014-09-02 14:32:41 -0400 (Tue, 02 Sep 2014)