[releng_6 tinderbox] failure on amd64/amd64

[FreeBSD Tinderbox]

TB --- 2006-10-13 12:06:14 - tinderbox 2.3 running on freebsd-current.sentex.ca
TB --- 2006-10-13 12:06:14 - starting RELENG_6 tinderbox run for amd64/amd64
TB --- 2006-10-13 12:06:14 - cleaning the object tree
TB --- 2006-10-13 12:06:45 - checking out the source tree
TB --- 2006-10-13 12:06:45 - cd /tinderbox/RELENG_6/amd64/amd64
TB --- 2006-10-13 12:06:45 - /usr/bin/cvs -f -R -q -d/home/ncvs update -Pd -rRELENG_6 src
TB --- 2006-10-13 12:18:00 - building world (CFLAGS=-O2 -pipe)
TB --- 2006-10-13 12:18:00 - cd /src
TB --- 2006-10-13 12:18:00 - /usr/bin/make -B buildworld
>>> Rebuilding the temporary build tree
>>> stage 1.1: legacy release compatibility shims
>>> stage 1.2: bootstrap tools
>>> stage 2.1: cleaning up the object tree
>>> stage 2.2: rebuilding the object tree
>>> stage 2.3: build tools
>>> stage 3: cross tools
>>> stage 4.1: building includes
>>> stage 4.2: building libraries
>>> stage 4.3: make dependencies
>>> stage 4.4: building everything
[...]
rm -f .depend
mkdep -f .depend -a    -DRESCUE /src/sbin/mount/mount.c /src/sbin/mount/mount_ufs.c /src/sbin/mount/getmntopts.c /src/sbin/mount/vfslist.c
echo mount: /obj/amd64/src/tmp/usr/lib/libc.a  >> .depend
cc -O2 -pipe  -DRESCUE  -c /src/sbin/mount/mount.c
/src/sbin/mount/mount.c: In function `mountfs':
/src/sbin/mount/mount.c:432: error: `fstab' undeclared (first use in this function)
/src/sbin/mount/mount.c:432: error: (Each undeclared identifier is reported only once
/src/sbin/mount/mount.c:432: error: for each function it appears in.)
*** Error code 1

Stop in /src/sbin/mount.
*** Error code 1

Stop in /obj/amd64/src/rescue/rescue.
*** Error code 1

Stop in /src/rescue/rescue.
*** Error code 1

Stop in /src/rescue.
*** Error code 1

Stop in /src.
*** Error code 1

Stop in /src.
*** Error code 1

Stop in /src.
TB --- 2006-10-13 12:58:08 - WARNING: /usr/bin/make returned exit code  1 
TB --- 2006-10-13 12:58:08 - ERROR: failed to build world
TB --- 2006-10-13 12:58:08 - tinderbox aborted
TB --- 0.96 user 3.06 system 3114.29 real