sbcl 1.0.57

changes in sbcl-1.0.57 relative to sbcl-1.0.56:
  * RANDOM enhancements and bug fixes:
    ** bug fix: the range and distribution of random integers could be
       catastrophically wrong when the compiler derived the type of its
       argument as a disjoint set of small integers.
    ** bug fix: the distribution of random integers is now completely
       uniform even when the specified limit is not a power of two.
       (Previously some values could be about 0.1 % more probable than
       others in the worst case.)
    ** RANDOM on large integer arguments is generally faster and conses
       less than before; this is visible for fixnums above a length of
       about 24 bits, but extremely so for bignums: the old implementation
       used time and space quadratical in the size of the argument there,
       the new one is linear.
  * enhancement: redesigned protocol for quitting SBCL. SB-EXT:EXIT is the new
    main entry point, SB-EXT:QUIT is deprecated.
  * enhancement: additions to the SB-THREAD API: RETURN-FROM-THREAD,
    ABORT-THREAD, MAIN-THREAD-P, and MAIN-THREAD.
  * enhancement: FASL loading no longer grabs the world-lock.
  * enhancement: GENCGC reclaims space more aggressively when objects being
    allocated are a large fraction of the total available heap space.
    (lp#936304)
  * enhancement: backtraces show the correct number of arguments for frames
    called with too many arguments.
  * enhancement: support for abort(3), exit(3), and _exit(2) has been added to
    SB-POSIX.
  * enhancement: ASDF has been updated 2.21.
  * optimization: fewer uses of full calls to signed modular functions.
    (lp#903821)
  * optimization: typechecking alien values is typically 5 x faster.
  * optimization: FDEFINITION, SYMBOL-FUNCTION, MACRO-FUNCTION, and FBOUNDP
    are 20% faster.
  * bug fix: file compilation performance issues when dumping subtypes
    of CHARACTER (lp#994487)
  * bug fix: fixed disassembly of some SSE instructions on x86-64.
  * bug fix: SB-SIMPLE-STREAMS signals an error for bogus :CLASS arguments in
    OPEN. (lp#969352, thanks to Kambiz Darabi)
  * bug fix: CASE normal-clauses do not allow T and OTHERWISE as keys.
    (lp#959687)
  * bug fix: (SETF (FIND-CLASS X) NIL) removed proper name of the underlying
    classoid even if X was not the proper name of the class. (lp#941102)
  * bug fix: declaration leakage between lexical environments due to careless
    use of NCONC in MAKE-LEXENV. (lp#924276)
  * bug fix: ENSURE-DIRECTORIES-EXIST now works when
    *default-pathname-defaults* contains NAME or TYPE components.
  * bug fix: PPRINT couldn't print improper lists with CARs being some symbols
    from CL package, e.g. (loop . 10).
  * bug fix: run-program with existent or non-existent files for :output or
    :input when :if-output-exists or :if-input-does-not-exist are NIL properly
    returns NIL instead of signalling an obscure error.
  * bug fix: fix miscompilation of some logand forms with large constant
    arguments.  (lp#974406)
  * bug fix: account for funcallable-instance objects properly in ROOM.
  * bug fix: incorrect octets reported for c-string decoding errors.
    (lp#985505)
  * bug fix: miscompilation of LDB on the PowerPC platform.  (thanks to Bruce
    O'Neel)
  * bug fix: better input error reporting for COMPILE-FILE. (lp#493380)
  * bug fix: default size of non-nursery generations has been shrunk on GENCGC,
    allowing faster release of memory back to the OS. (lp#991293)
  * bug fix: WITH-DEADLINE (:SECONDS NIL :OVERRIDE T) now drops any
    existing deadline for the dynamic scope of its body.
  * bug fix: compiler-internal interval arithmetic needed to be more
    conservative about open intervals when operated on by monotonic but not
    strictly-monotonic functions.  (lp#975528)
  * bug fix: copy-tree caused stack exhaustion on long linear lists, and now
    it's also slightly faster. (lp#998926)
  * bug fix: better error messages for malformed declarations.
    (lp#1000239)
  * bug fix: define-condition didn't return the name of the defined condition.
  * documentation:
    ** improved docstrings: REPLACE (lp#965592)

--
Juho Snellman

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