+changes in sbcl-0.9.18 (1.0.beta?) relative to sbcl-0.9.16:
+ * bug fix: two potential GC deadlocks affecting threaded builds.
+ * bug fix: (TYPEP #\A '(NOT (MEMBER #\" #\{ #\:))) now correctly
+ returns T (reported by Anton Kazennikov)
+ * bug fix: the STORE-VALUE restart of CHECK-TYPE works correctly
+ with non-variable places
+ * improvement: the debugger will now also display local variables that
+ are only used once, for code compiled with a DEBUG optimization quality
+ of 2 or higher.
+