changes in sbcl-2.3.0 relative to sbcl-2.2.11:

  * enhancement: support for SLOT-VALUE and friends has been extended to
    structure and condition instances.
  * enhancement: the error message for invalid array index conditions is clearer.
    (lp#1999337, reported by Hadrien Lacour)
  * minor incompatible change: COMPILED-FUNCTION-P now returns false for
    generic functions.
  * minor incompatible change: the compiler emit STYLE-WARNING conditions for
    FIND and POSITION where the item sought can never be present in the
    sequence.
  * optimization: support computing the remainder of a constant division by
    multiplication.
  * optimization: faster out of line float truncation routines.
  * optimization: faster RATIONAL on 64-bit platforms.
  * optimization: more compact testing of widetags on x86-64 and arm64.
  * bug fix: type intersections of RATIONAL ranges with (NOT INTEGER) are
    computed more consistently.  (lp#1998008)
  * bug fix: fix miscompilation of integer/fixnum comparisons where both
    arguments are on the stack.
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