changes in sbcl-1.2.2 relative to sbcl-1.2.1:
* incompatible change: the #\` ("backquote") reader macro was reimplemented
to support robust pretty-printing. Reading a form involving #\` produces
an invocation of the QUASIQUOTE ordinary macro which may contain subforms
that are not lists. Code that unportably attempts operations on
un-evaluated forms resulting therefrom, e.g.
(SUBST a b (read-from-string "`(x (,y))"))
might generate incorrect results and/or errors.
* enhancement: support for GNU/kFreeBSD x86.
* enhancement: ATOMIC-INCF and ATOMIC-DECF can operate on (CAR x), (CDR x)
and DEFGLOBAL variables of type fixnum.
* enhancement: arithmetic constant reduction is now performed on defconstant
constants too. (lp#1337069).
* bug fix: certain ftype proclamations containing &optional t &rest t no
longer cause subsequent definitions to signal bogus style-warnings.
* bug fix: #\Bell and #\Bel now read to different characters. (lp#1319452).
* bug fix: CAS SYMBOL-VALUE on locally special variables didn't work.
(lp#1098355)