buildworld 10-stable problem on Xserve G5

[Bill Sorenson]

I've been rebuilding 10-stable about weekly on my Xserve G5 for
probably close to a year now, mostly without issue. Starting around
rev 281908 though, when building world it dies with the message "Don't
know how to make beastie.4th" Any idea if its something I did? I did
try deleting /usr/src and rechecked out 10-stable with no change.
Using default gcc 4.2.1. Maybe my current install is broken and unable
to build properly?

Thanks,
Bill S.