AMD64 make buildworld failure

[stan]

I'm trying to do a buildworld (AMD64) on a Sum Ultra 40, but it's failing
like this:

cc -O2 -fno-strict-aliasing -pipe  -DRRESTORE -DRESCUE  -c
/usr/src/sbin/restore
/restore.c
cc -O2 -fno-strict-aliasing -pipe  -DRRESTORE -DRESCUE  -c
/usr/src/sbin/restore
/dirs.c
/usr/src/sbin/restore/dirs.c: In function `extractdirs':
/usr/src/sbin/restore/dirs.c:192: internal compiler error: Segmentation
fault: 1
1
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
*** Error code 1

Stop in /usr/src/sbin/restore.
*** Error code 1

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

This is installed from the 6.1 Release CD, and then cvsup'd

Can anyone tell me where I should start looking.

-- 
Unix is very simple, but it takes a genius to understand the simplicity.
(Dennis Ritchie)