changes in sbcl-1.3.9 relative to sbcl-1.3.8:
* minor incompatible change: NAMESTRING prefers to return a BASE-STRING
instead of (ARRAY CHARACTER (*)) when possible.
* enhancement: cached make-instance/allocate-instance constructors can now
get garbage collected.
* optimization: better performance for some unoptimized operations on
complex numbers.
* bug fix: using the options :LOCAL-NICKNAMES and :LOCK in the same
DEFPACKAGE form no longer signals a bogus error