DTrace probes broken in HEAD on Solaris?

Most of the Solaris buildfarm members are unhappy this morning.
It looks like the ones that are busted have --enable-dtrace,
which points the finger at the dtrace probe changes I made yesterday:
http://archives.postgresql.org/pgsql-committers/2009-03/msg00079.php

Those changes work on Linux and OS X, so it's not clear what I did
wrong.  Can anyone with a Solaris machine poke into it, at least
to the extent of finding out where it's dumping core?
        regards, tom lane