There is a known problem with MIPS tinderbox.

On Thu, Apr 5, 2012 at 12:28, Doug Barton <dougb_at_freebsd.org> wrote:
> But as always, if someone comes up with an actual problem related to the
> [BIND] update I'm happy to address it.

The MIPS tinderbox build is currently broken.  This is related to a
binutils bug for which a workaround was committed to head.  For some
reason, the workaround seems to be sufficient for universe done
independently, but not the tinderbox.

There is a fix for binutils which is known, but the fix was made after
the GPLv3 switch.  HJ Lu, who made the change, has been contacted
about making the change available under GPLv2, but so far has not
replied.  Independently, jchandra_at_ is investigating the problem in
binutils and attempting to come up with a fix from scratch.

You have not broken the MIPS tinderbox.  It has been broken for a
couple of weeks now, and is a known problem, and hopefully will be
fixed soon.

Thanks,
Juli.