changes in sbcl-2.3.3 relative to sbcl-2.3.2:

  * enhancement: LET-bound anonymous closures declared dynamic extent can now
    be stack allocated, just like closures bound with FLET or
    LABELS. Otherwise-inaccessible closure subparts of objects declared
    dynamic extent can now also be stack allocated
  * optimization: many standard CL functions which take functional arguments
    will automatically stack allocate any downward funarg closures.
  * optimization: better arithmetic between signed and unsigned words on arm64.
  * optimization: reduce consing when doing arithmetic resulting in small (3
    words or fewer) bignums.
  * bug fix: miscompilation of some additions of signed and unsigned words on
    x86-64.  (lp#2008673)
  * bug fix: loading the SB-SIMPLE-STREAMS contrib no longer incompatibly
    overwrites CL:OPEN's function type.  (lp#2008811)
  * bug fix: implement the special-case automatic function definition for
    PCL's slot accessor functions in the SB-EVAL interpreter.  (lp#2008922,
    reported by Jonathan Braud)
  * bug fix: allow the build to succeed under SBCLs older than 2.0.0 in the
    event that the host emits STYLE-WARNINGs while compiling the
    cross-compiler.  (lp#2009493, reported by Kirill)
  * bug fix: restore compilation on ARM64 with OpenBSD.  (lp#2009585, reported
    by okflo)
  * bug fix: compiling a HANDLER-BIND with an function undefined at
    compile-time produces a compile-time STYLE-WARNING.  (lp2010176)
  * bug fix: support files bigger than 4GB on ARM64/Linux, *BSD. (lp#2011453,
    reported by Yan)
  * bug fix: it is now possible to run sb-simd tests on systems without AVX2.
    (lp#2011923, thanks to Sergio Durigan Junior)
  * bug fix: miscompilation of some conditional moves.  (lp#2012312, reported
    by Patrick Poitras)
  * bug fix: SB-GMP no longer signals a TYPE-ERROR when raising a ratio base
    to a negative integer exponent.  (lp#2012577, thanks to Ari Projansky)
  * bug fix: warn the user when they have declared a structure or
    standard-object slot of :TYPE NIL.
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