Thanks for fixing this so quickly.  I believe this is a long-standing
bug.  I confirmed that the crash occurs in both 6.4 and 6.3 on
Solaris x86.  It may have been there forever.  I also believe that
the bug only occurs when re-finalizing within the same session.
We run a new ec session each time we re-finalize before releasing
to production, which is probably why we never hit this bug.

Since we used 6.3 for a year without problems, I think we can safely wait 
for a fix in 6.6.