** The system now obeys the constraint imposed by
UPGRADED-ARRAY-ELEMENT-TYPE that the upgraded array element
types form a lattice under type intersection.
+ ** FFLOOR, FTRUNCATE, FCEILING and FROUND work with integers.
+ ** ASSOC now ignores NIL elements in an alist.
planned incompatible changes in 0.8.x:
* (not done yet, but planned:) When the profiling interface settles