as unknown types. (reported by piso on #lisp)
* bug fix: the :IF-EXISTS argument to OPEN now behaves correctly
with values NIL and :ERROR. (thanks to Milan Zamazal)
+ * fixed bug 191c: CLOS now does proper keyword argument checking as
+ described in CLHS 7.6.5 and 7.6.5.1.
* compiler enhancement: SIGNUM is now better able to derive the type
of its result.
* type declarations inside WITH-SLOTS are checked. (reported by