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;;;; -*- coding: utf-8; fill-column: 78 -*-
changes in sbcl-1.0.47 relative to sbcl-1.0.46:
  * bug fix: fix mach port rights leaks in mach exception handling code on
    darwin/x86 and /x86-64. (thanks to Willem Oudshoorn for motivation and the
    initial patch)
  * enhancement: --script muffles style-warnings and compiler notes. (lp#677779)
  * enhancement: redefinition warnings for macros from different files. (lp#434657)
  * enhancement: better MACHINE-VERSION on Darwin x86 and x86-64. (lp#668332)
  * enhancement: (FORMAT "foo" ...) and similar signal a compile-time warning. (lp#327223)
  * enhancement: no more "in: LAMBDA NIL" messages from the compiler for forms
    processed using EVAL -- now the appropriate toplevel form is reported instead.
  * enhancement: more legible style-warnings for inappropriate IGNORE and IGNORABLE
    declarations. (lp#726331)
  * enhancement: :NOT-NULL option has been added to alien C-STRING type to indicate
    that NIL/NULL is excluded from the type.
  * enhancement: SB-INTROSPECT:MAP-ROOT allows mapping over pointers contained in
    arbitrary objects.
  * optimization: SLOT-VALUE &co are faster in the presence of SLOT-VALUE-USING-CLASS
    and its compatriots.
  * optimization: core startup time is reduced by 30% on x86-64. (lp#557357)
  * bug fix: SB-DEBUG:BACKTRACE-AS-LIST guards against potentially leaking
    stack-allocated values out of their dynamic-extent. (lp#310175)
  * bug fix: attempts to use SB-SPROF for wallclock profiling on threaded
    x86-64 builds caused a type-error.
  * bug fix: calling COMPILE with something else than a lambda-expression as the
    second argument reports a more sensible error. (lp#718905)
  * bug fix: invalid combinations of :PREDICATE and :TYPE options in DEFSTRUCT
    are detected. (lp#520607)
  * bug fix: constant keyword argument checking didn't take :ALLOW-OTHER-KEYS
    into account.
  * bug fix: SLOT-BOUNDP information is correct during MAKE-INSTANCE in the
    methods. (regression from
  * bug fix: INITIALIZE-INSTANCE :AROUND methods supplying initargs via
    CALL-NEXT-METHOD work correctly. (regression from
  * bug fix: several foreign functions accepting string also accepted NIL and
    consequently caused a memory fault at 0 now signal a type-error instead.
  * bug fix: under rare circumstances, constraint propagation could rewrite a
    variable reference to refer to a variable not in scope, causing an error
    during physical environment analysis when attempting to close over the
    variable. (lp#551227)
  * bug fix: SIMPLE-CONDITION :FORMAT-CONTROL defaults to NIL.

changes in sbcl-1.0.46 relative to sbcl-1.0.45:
  * enhancement: largefile support on Solaris.
  * enhancement: SB-PROFILE:REPORT now supports :LIMIT and :PRINT-NO-CALL-LIST
    arguments (lp#710017)
  * enhancement: SB-PCL:+SLOT-UNBOUND+ is exported, making it possible to
    distinguish unbound instance slots when using STANDARD-INSTANCE-ACCESS
    &co. (lp#718039)
  * optimization: ERROR and CERROR are approximately 5 times faster.
  * optimization: optimized constructors are used for MAKE-INSTANCE of classes
    with applicable non-standard (SETF SLOT-VALUE-USING-CLASS),
    up instance creation in those cases.
  * optimization: arithmetic operations with multiple constant arguments in now
    have them reduced at compile-time. (lp#676414)
  * optimization: determining current character position on string-streams for
    pretty-printing was overly slow.
  * bug fix: local tail calls to DYNAMIC-EXTENT functions can no longer cause
    lifetime analysis to overwrite closed-over variables (lp#681092).
  * bug fix: encoding errors from some multibyte external formats such as EUC-JP
    were not handled correctly (lp#713063).
  * bug fix: printing waitqueue objects without setting *PRINT-CIRCLE* to T is now
    safe (lp#673630).
  * bug fix: Solaris/x86-64 wasn't getting built with lutex support by
    mistake. (lp#667297).
  * bug fix: CONSTANTLY generated functions had bogus lambda-lists. (lp#713626)
  * bug fix: RUN-PROGRAM :PTY option was racy on OpenBSD. (lp#669485)
  * bug fix: UNINTERN takes a symbol, not a symbol designator -- could previously
    unintern the wrong symbol with the same name. (lp#693796)
  * bug fix: COPY-PPRINT-DISPATCH always has access to a pristine table,
    making it possible to restore the initial table if it has been messed up.

changes in sbcl-1.0.45 relative to sbcl-1.0.44:
  * enhancement: ~/ and ~user/ are treated specially in pathnames.
    Refer to documentation for details.
  * enhancement: ASDF has been updated to version 2.010.
  * optimization: mutated closed-over variables that are only accessed by
    DYNAMIC-EXTENT closures (currently only FLET and LABELS functions
    declared to be DYNAMIC-EXTENT) are stored directly in their containing
    stack frame, rather than allocating a VALUE-CELL (lp#586103).
  * optimization: UNWIND-PROTECT cleanup functions are now declared
  * bug fix: backtracing function with &REST arguments now shows the full
    argument list. (lp#310173)
  * bug fix: return types for functions with complex lambda-lists are now
    derived properly (lp#384892)
  * bug fix: when SPEED > SPACE compiling CONCATENATE 'STRING with constant
    long string arguments slowed the compiler down to a crawl.
  * bug fix: closure VALUE-CELLs are no longer stack-allocated (lp#308934).
  * bug fix: non-standard MAKE-METHOD-LAMBDA methods could break RETURN-FROM
    in the DEFMETHOD body.
  * bug fix: #<SB-C::DEFINED-FUN ...> should no longer appear in compiler
    messages, being instead replaced with the corresponding function name.
  * bug fix: don't derive overly complex unions of numeric types for arithmetic
    operators. (lp#309448)

changes in sbcl-1.0.44 relative to sbcl-1.0.43:
  * enhancement: RUN-PROGRAM accepts :EXTERNAL-FORMAT argument to select the
    external-format for its :INPUT, :OUTPUT, AND :ERROR :STREAMs.
  * enhancement: ALLOCATION-INFORMATION also provides the page the object
    resides on.
  * enhancement: default dynamic-space size can be configured at build-time
    without touching source, using the --dynamic-space-size argument to make.sh.
  * enhancement: DESCRIBE recognizes symbols naming optimization policy
    qualities, and mentions ALWAYS-BOUND declarations.
  * enhancement: ATOMIC-INCF now supports AREF of (SIMPLE-ARRAY SB-EXT:WORD (*))
    as a place.
  * enhancement: ASDF has been updated to 2.009.
  * enhancement: the system detects known type-erros in calls better,
    signalling a full warning about violated proclaimed FTYPEs and violations
    of derived FTYPEs within the same file, including self-calls.
  * enhancement: new function: SB-EXT:DELETE-DIRECTORY is now provided.
  * optimization: constant-folding exploits numeric and character types, in
    addition member types.
  * optimization: numeric, character and member types that are inhabited by
    exactly one value are tested with EQL.
  * optimization: more conditional branches are eliminated during IR1.
    Branches are simplified before performing if/if-conversion, and simple
    equivalent branches (that only read the same constant or variable) are
  * improvements to the Windows port:
    ** change: canonical unparsing form for pathname namestrings now uses / as
       directory separator. NATIVE-NAMESTRING still uses \ as the separator.
    ** bug fix: stackoverwriting due to incorrect usage of PeekConsoleInput
       on Windows. (thanks to Kalyanov Dmitry)
    ** bug fix: build now works on cygwin with GCC 4.x installed. (thanks to
       Kalyanov Dmitry)
    ** bug fix: run-sbcl.sh now works on Cygwin. (thanks to Kalyanov Dmitry)
  * bug fix: compiler failed to derive the result-type of MAKE-ARRAY as
    (AND VECTOR (NOT SIMPLE-ARRAY)) when appropriate. (lp#309130)
  * bug fix: (THE (VALUES ...)) in LOAD-TIME-VALUE caused a compiler-error.
  * bug fix: interrupts arriving during CL:OPEN caused an error.
  * bug fix: overeager character buffering could cause input to block
    spuriously when reading from a pipe (lp#643686)
  * bug fix: more efficient timer expiry should avoid starvation on systems
    where number of SIGALRMs per second is restricted. (lp#375515)
  * bug fix: non-unicode builds no longer fail (broken since
  * bug fix: compile-times no longer scale linearly with the size of
    quoted lists in source-code. (lp#654289)
  * bug fix: better errors for unknown external-formats in OPEN. (lp#561974)
  * bug fix: DEBUG>SPEED no longer degrades ALIEN-FUNCALL performance quite
    so badly. (lp#654485)
    an error for eg. STRUCTURE. (lp#458015)
  * bug fix: LOOP WITH NIL = ... signalled an unused variable style-warning.
    (lp#613871, thanks to Roman Marynchak)
  * bug fix: more reliable &REST list type derivation. (lp#655203)
  * bug fix: PPRINT-LOGICAL-BLOCK multiply-evaluated :PER-LINE-PREFIX,
    and issued pointles code-deletion notes for it, :PREFIX, and :SUFFIX.
  * bug fix: the compiler didn't utilize the proclaimed ftype for functions
    also declared NOTINLINE. (lp#655581)
  * bug fix: the compiler could attempt to emit constant left shifts of 
    greater value than n-word-bits. (lp#309063)
  * bug fix: (SETF SYMBOL-FUNCTION) and (SETF FDEFINITION) clear derived
    type information for the function being set. (lp#659220)
  * bug fix: the system used to signal bogus STYLE-WARNINGs when functions
    containing self-calls were recompiled with a new signature, and failed
    to warn when a self-call using the old signature was left in. (lp#655126)
  * bug fix: incorrect FILE-POSITION on streams opened using :EXTERNAL-FORMAT
    :DEFAULT when the default external had character size other than 8 bits.
    trusted, leading to potential heap corruption when those function were
    defined incompatibly. (lp#657499)
  * bug fix: existing ASDF source registries are ignored when building
    contribs (lp#659105)
  * bug fix: short-form DEFSETF checks that the second argument is a symbol
    (lp#655824, thanks to Roman Marynchak)
  * bug fix: (SETF MACRO-FUNCTION) clobbered macro-definitions before
    package-lock violation was detected. (lp#660752)
  * bug fix: the system can store different docstrings for a single function
    under different names. (lp#661631, regression from
  * bug fix: source-locations of DEFGENERIC forms weren't getting recorded
    properly. (lp#384801)
  * bug fix: (COERCE X '(SIMPLE-VECTOR 5)) and similar coercions to vectors
    of specified length could confuse the type derivation in unsafe code.
  * bug fix: SB-POSIX:FORK now signals an error if an attempt to
    fork with multiple Lisp threads running is made on every platform,
    not just Darwin. (lp#451111)
  * bug fix: SB-BSD-SOCKETS and SB-SIMPLE-STREAMS could leave stale finalizers
    around when core was saved, which could cause undefined behaviour when the
    core was reified. 
  * bug fix: Allow UNTRACE of functions that are no longer defined
    (lp#667657, thanks to Attila Lendvai)
  * bug fix: MAKE-ARRAY calls with invalid keyword argument lists now signal a
    compile-time warning (lp#664373, thanks to Stas Boukarev)

changes in sbcl-1.0.43 relative to sbcl-1.0.42:
    event-loop by default. (lp#316072)
    ** In addition to streams created by explicit calls to MAKE-FD-STREAM this
       affects streams from CL:OPEN.
    ** Streams from SOCKET-MAKE-STREAM still participate in serve-event by
       default, but this is liable to change: applications needing serve-event
       for socket streams should explicitly request it using :SERVE-EVENTS T
       in the call.
  * enhancement: SB-EXT:WORD type is provided for use with SB-EXT:ATOMIC-INCF
  * enhancement: CLOS effective method functions and defclass slot typechecking
    function now have debug names for use in backtraces and profiles.
  * enhancement: ASDF has been updated to version 2.004. (lp#605260, thanks to
    Faré Rideau)
  * enhancement: symbols are printed using fully qualified names in several
    error and warning messages which are often associated with package
    conflicts or mixups (lp#622789, thanks to Attila Lendvai)
  * bug fix: SB-BSD-SOCKETS:SOCKET-CONNECT was not thread safe. (lp#505497,
    thanks to Andrew Golding)
  * bug fix: reading /proc files on Linux works. (lp#425199)
  * bug fix: DOTIMES accepted literal non-integer reals. (lp#619393, thanks to
    Roman Marynchak)
  * bug fix: WRITE-TO-STRING compiler macro binding special variable names,
    breaking code that tried to write the value of a printer control variable.
    (lp#581564, thanks to Stas Boukarev)
  * bug fix: WRITE compiler macro did not handle output stream designators
    correctly. (lp#598374, thanks to Stas Boukarev)
  * bug fix: better availability of names of foreign functions in backtraces
    on Linux. (lp#626962, thanks to Stas Boukarev)
  * bug fix: scripting and build for Solaris and FreeBSD. (lp#615497,
    lp#627581, thanks to Josh Elsasser and Jim Wise)
  * bug fix: build fixes for OpenBSD -current and 4.8 (lp#615489, lp#615492,
    thanks to Josh Elsasser)
  * bug fix: using aliases for builtin classes as defmethod specializers
    without adding DEFTYPEs for them works. (lp#618387)
  * bug fix: timetravel by getrusage() no longer causes type-errors during GC.
  * bug fix: legally dynamic-extent lists and vectors used as
    initialization arguments to MAKE-ARRAY can be stack allocated. (lp#586105)
  * bug fix: inline-expansion creating references to dead lambda-variables
    (lp#454681, thanks to Alexey Dejneka)
  * bug fix: better error message for bogus numerical arguments to RANDOM.
    (lp#598986, thanks to Stas Boukarev)
  * bug fix: the compiler occasionally inlined references from incompatible
    environments occurs. (lp#308951)
  * bug fix: the compiler threw an error when trying to compile a local
    function (labels or flet) known to take a specialized complex argument.
    (not in launchpad, reported by sykopomp in #lispgames)
  * bug fix: package-locks failed to protect against compile-time effects of
    DEFUN when the symbol previously had a macro definition. (lp#576637)
  * bug fix: spurious ignore warnings even given (DECLARE IGNORE) in methods
    when parameter bindings mutated.  (reported by Faré Rideau; lp #611361)
  * bug fix: workaround for compiler hang in ORDER-UVL-SETS (lp#308914)
  * bug fix: evaluation in debugger REPL works using the global context when
    in frames that do not have sufficient debug information.
  * bug fix: exceeding FD_SETSIZE limit now results in an sensible error
  * bug fix: (SETF DOCUMENTATION) of a macro works properly. (lp#643958, thanks
    to Stas Boukarev)
  * bug fix: interrupt taking longer than the requested period caused SLEEP
    to hang on Darwin. (lp#640516, thanks to Joe Lebroco for the analysis)

changes in sbcl-1.0.42 relative to sbcl-1.0.41
  * build changes
    ** Cross-compilation host is now specified to make.sh using
       command-line argument --xc-host=<command> instead of a positional
       argument. (thanks to Daniel Herring)
    ** Install location can be specified to make.sh using command-line
       argument --prefix=<path>. (lp#550889s, thanks to Daniel Herring)
  * optimization: The default implementation of
    COMPUTE-DISCRIMINATING-FUNCTION does much less wasted work.
  * enhancement: Explicit memory barrier operations are now available for use
    by multithreaded code.  See documentation for details.
  * enhancement: Experimental support for threading on Linux/PPC.
  * bug fix: RENAME-PACKAGE returns the package.  (Thanks to Eric Marsden)
  * bug fix: EXPT signals an error if first argument is a zero and second
    argument is a floating point zero. (lp#571581, thanks to Roman Marynchak)
  * bug fix: DEFTYPE signals an error for non-list lambda-lists.
    (lp#576594, thanks to Roman Marynchak)
  * bug fix: make ASDF-INSTALL compatible with the now-included ASDF2.
    (lp#612998, reported by Phil Hargett; patch from Jim Wise)

changes in sbcl-1.0.41 relative to sbcl-1.0.40:
    cached, leading to many fewer expensive calls to
    CLASS argument, search for and call an appropriate optimized ctor function
    if it exists.
  * bug fix: WRITE always returns the correct value.

changes in sbcl-1.0.40 relative to sbcl-1.0.39:
  * bug fix: readdir now works on :inode64 darwin builds (lp#592897)
  * bug fix: Name conflicts between symbols passed as arguments to a single
    call to IMPORT no longer add multiple symbols with the same name to the
    package (detectable via DO-SYMBOLS).
  * bug fix: support building without the dlshim on darwin x86 and x86-64
  * bug fix: TRACE :ENCAPSULATE NIL now works on ppc/linux.

changes in sbcl-1.0.39 relative to sbcl-1.0.38:
  * bug fix: Backtrace from undefined function on x86 and x86-64 now show
    the calling frame.
  * bug fix: linkage-table entries on PPC now no longer overflow their
    space allocation (potentially causing crashes if they are written out
    of order).
  * bug fix: Scrub control stack after scavenging in gencgc on non-x86oid
    platforms, preventing the GC from seeing stale pointers on the control
    stack in subsequent GCs (which would, and does, break invariants).
  * bug fix: 32-bit unicode external formats now work on big-endian systems.
  * bug fix: Literal characters with code points greater than about 32767
    now work on PPC UNICODE builds.
  * bug fix: Any noise left by SSE operations (sqrt and conversions) in the
    high order bits are explicitly cleared out. In some contrived situations,
    this could lead to wrong results in mixed real/complex float arithmetic.
  * bug fix: Fix function/macro redefinition warnings when building with
    clisp.  (lp#576787, thanks to Josh Elsasser)
  * new platform: experimental support for ppc/openbsd (thanks to Josh
  * bug fix: Floating-point traps now work on ppc/linux.

changes in sbcl-1.0.38 relative to sbcl-1.0.37:
  * incompatible change: Thread names are now restricted to SIMPLE-STRINGs
    like for any other thread-related datastructure, MUTEX, etc. (lp#547095)
  * deprecation: the SB-QUEUE contrib was merged into the SB-CONCURRENCY
    contrib module. New code should depend on SB-CONCURRENCY, not SB-QUEUE.
  * deprecation: SB-THEAD:GET-MUTEX was deprecated in favor of
  * new contributed module: SB-CONCURRENCY is a new contrib; it's supposed to
    contain additional data structures and tools for concurrent programming;
    at the moment it contains a lock-free queue, and a lock-free mailbox
  * new feature: added SB-THREAD:GRAB-MUTEX; it's like the now deprecated
    GET-MUTEX but takes &key rather than &optional parameters.  Also added
    :TIMEOUT argument to GRAB-MUTEX on non-sb-lutex platforms like Linux and
  * new feature: added SB-THREAD:TRY-SEMAPHORE, a non-blocking variant of
  * new feature: SB-EXT:ATOMIC-DECF has been added as a companion to
  * new feature: a CANCEL-DEADLINE is associated with DEADLINE-TIMEOUT
    conditions to defer the deadline for forever.
  * enhancement: *STANDARD-OUTPUT*, *STANDARD-INPUT*, and *ERROR-OUTPUT* are
    now bivalent.
  * enhancement: errors from NO-APPLICABLE-METHOD and
    NO-PRIMARY-METHOD now have a RETRY restart available to retry the
    generic function call.
  * enhancement: SB-BSD-SOCKET improvements
    ** sockets and socket streams now have a more informative printed
       representation based on the corresponding SOCKET-NAME and
    ** SOCKET-MAKE-STREAM once more supports the :AUTO-CLOSE option.
    ** SOCKET-CLOSE now accepts :ABORT argument, which is passed on to
       CL:CLOSE when appropriate, and no longer disassociates the stream
       from the socket if close failed. (lp#543951)
  * improvements to the instrumenting profiler
    ** new feature: report per-function GC overhead. (thanks to John Fremlin)
    ** optimization: counters no longer use locks for the overflow mode.
    ** bug fix: whenever a profiling counter wrapped into overflow mode, it
       incurred an off-by-one miscount.
  * enhancement: improved MAKE-HASH-TABLE documentation (lp#543473)
  * enhancement: improved DEFMETHOD pretty-printing.
  * enhancement: perform range reduction when arguments are too large for
    x87's transcendentals (instead of returning 0). (lp#327192)
  * enhancement: eliminate some spurious TYPE-WARNINGs. Should help with
    some of CL-PPCRE's macros. (lp#570079)
  * enhancement: our machine code is slightly less hostile to valgrind on 
  * enhancement: up-to-date versions of NetBSD-current are supported.  (Thanks
    to Robert Swindells and Aleksej Saushev)
  * bug fix: correct restart text for the continuable error in MAKE-PACKAGE.
  * bug fix: a rare case of startup-time page table corruption.
  * bug fix: a semaphore with multiple waiters and some of them unwinding due
    to timeouts could be left in an inconsistent state.
  * bug fix: fix typo in "Reporting Bugs" section of the manual (lp#520366)
  * bug fix: misoptimization of multiplication by one in
    (SB-C::FLOAT-ACCURACY 0) policies.
  * bug fix: miscounts in SB-PROFILE.
  * bug fix: Fix lost wakeup bug between SB-THREAD:CONDITION-WAIT and
    CONDITION-NOTIFY on Linux. See threads "lost wakeup in condition-wait /
    condition-notify" (Feb 2010) and "Condition-Wait, Deadline handler, waking
    up itself" (March 2010) for further details.
  * bug fix: allow forward FIND and POSITION on lists to elide checking :END
    against length of the list if the element is found before the specified
    END is reached. (thanks to Alec Berryman, lp#554385)
  * bug fix: errors signalled during package graph modification no longer
    block FIND-SYMBOL and FIND-PACKAGE in other threads. (lp#511072)
  * bug fix: SB-POSIX build was broken when SBCL was compiled without the
    :SB-DOC feature. (lp#552564)
  * bug fix: SB-INTROSPECT build issues on GENGC/PPC. (lp#490490)
  * bug fix: more robust runtime executable path detection. (lp#375549)
  * bug fix: GCD always returns positive values. (lp#413680)
  * bug fix: Converting division to multiplication by reciprocal handles
  * bug fix: We were too eager in eliding range reduction tests on x87.
    The maximal magnitude is 2^63, not 2^64.
  * bug fix: Transforms for TRUNCATE don't die when the result is completely
    ignored anymore.
  * bug fix: Maybe restore buildability on Alpha.
  * bug fix: READ-BYTE isn't inline anymore, fixing weird streams failures. 
  * bug fix: RANDOM-STATE can be printed readably again.
  * bug fix: Unreadable objects were sometimes printed like #<\nFoo>.
  * bug fix: Using EQL with non-constant values of constant type (e.g. EQL
    types) could result in type mismatches during compilation.

changes in sbcl-1.0.37 relative to sbcl-1.0.36:
  * enhancement: Backtrace from THROW to uncaught tag on x86oids now shows
    stack frame thrown from.
  * enhancement: WITH-COMPILATION-UNIT :POLICY allows restricting changes to
    compiler optimization qualities inside dynamic extent of its body.
  * enhancement: LOAD-LOGICAL-PATHNAME-TRANSLATIONS can be used to load
    translations from SYS:SITE;<HOST>.TRANSLATIONS.NEWEST (thanks to Michael
  * optimization: SLOT-VALUE and (SETF SLOT-VALUE) take advantage of
    constraint propgation, allowing better compilation eg. when used to
    access structures with WITH-SLOTS. (lp#520366)
  * optimization: the compiler is now more aware of the type of the underlying
    storage vector for multidimensional simple arrays resulting in better code
    for accessing such arrays.
  * optimization: passing NIL as the environment argument to TYPEP no longer
    inhibits optimizing it. (lp#309788)
  * optimization: more efficient register usage when handling single-float
    arguments on x86-64. (thanks to Lutz Euler)
  * optimization: ADJUST-ARRAY and STABLE-SORT on vectors no longer use
    pre-allocated temporary vectors. (lp#496249)
  * bug fix: Fix compiler error involving MAKE-ARRAY and IF forms
    in :INITIAL-CONTENTS. (lp#523612)
  * bug fix: FUNCTION-LAMBDA-EXPRESSION lost declarations from interpreted
    functions. (lp#524707)
  * bug fix: bogus style warnings from certain (SETF SLOT-VALUE) and
    WITH-SLOTS usages during compilation.
  * bug fix: SB-C::CLASS-INFO now prints correctly. (lp#514762)
  * enhancement: Can now build with ud2 instead of int3 as trap instruction on
    all x86oid platforms with :UD2-BREAKPOINTS target feature.
  * bug fix: Breakpoints now work when using ud2 instead of int3 as trap
    instruction (tested on x86oid linux with ud2-breakpoints).
  * bug fix: slam.sh now works on win32.
  * bug fix: better differences of numeric types. (lp#309124)
  * bug fix: arrays declared intersection and union types can have their
    upgraded element type derived. (lp#316078)
  * bug fix: SB-SPROF allocation profiling for all threads failed to profile
    threads started during profiling. (lp#472499)
  * bug fix: SB-INTROSPECT test failure when building without SB-EVAL feature.
  * bug fix: SB-CLTL2:DECLARATION-INFORMATION did not take
    SB-EXT:RESTRICT-COMPILER-POLICY into account. (lp#313337)
  * bug fix: Comma inside a backquoted array or structure resulted in nonsense
    values instead of signaling an error. (lp#309093)
  * bug fix: Spurious unused variable warning in a DEFSTRUCT edge case.
  * bug fix: More consistent warnings and notes for ignored DYNAMIC-EXTENT
    declarations (lp#497321)
  * bug fix: FIND and POSITION on lists did not check sequence bounds properly
    and failed to detect circular lists (lp#452008)
  * bug fix: leakage from ~/.asdf-install into the ASDf-INSTALL contrib build
  * bug fix: LOOP OF-TYPE VECTOR compile-time error. (lp#540186)
  * bug fix: SIGNAL SB-SYS:INTERACTIVE-INTERRUPT before entering the debugger
    due to it, so that handlers can run.
  * bug fix: reparsing undefined types if they have become defined since
    parsing. (lp#309128)
  * bug fix: missing &REST type in a proclamation for a function with both
    &REST and &KEY in lambda-list caused miscompilation (lp#458354)
  * bug fix: WHO-CALLS information for source-transformed and compiler-macro
    expanded calls (lp#542174)
  * bug fix: more accurate WHO-MACROEXPANDS information; point into rather
    than just at toplevel form.

changes in sbcl-1.0.36 relative to sbcl-1.0.35:
  * new feature: SB-EXT:TYPEXPAND-1, SB-EXT:TYPEXPAND, and
    SB-EXT:TYPEXPAND-ALL behave exactly like their MACROEXPAND counterparts
    but work on type specifiers.
  * new feature: SB-EXT:DEFINED-TYPE-NAME-P returns whether a symbol is known
    to name a type specifier.
  * new feature: SB-EXT:VALID-TYPE-SPECIFIER-P returns whether a given type
    specifier is valid where "valid" basically means "would be accepted as
    second argument of TYPEP".
  * new feature: SB-INTROSPECT:FUNCTION-TYPE takes a function-designator and
    returns the function's declared, or derived FTYPE.
  * new feature: SB-POSIX now supports accessing the d_ino member of
    dirent structures.  (Thanks to Philipp Marek and Pierre THEIRRY)
  * new feature: The function SB-EXT:SEED-RANDOM-STATE has been added to
    provide for seeding a RANDOM-STATE object with user-provided data or
    from the operating system's PRNG.  Also, (MAKE-RANDOM-STATE T) will
    attempt to initialize the returned state from the operating system's
    PRNG where possible.  (Thanks to Fare Rideau; launchpad bug lp#310116)
  * bug fix: Fix SB-SIMPLE-STREAMS:READ-VECTOR to correctly set the
    FILE-POSITION of the stream being read from.  (launchpad bug lp#491087)
  * bug fix: Fix grammar and style issues for the docstrings of
    printer-related variables and functions.  (Thanks to mon_key; launchpad
    bug lp#518696)
  * bug fix: Fix compilation on chenygc platforms. Thanks to Larry Valkama and
    Bruce O'Neel.
  * bug fix: SB-THREAD:CONDITION-WAIT sometimes signaled a deadline twice 
    in a row even though a handler defered the deadline long into the
    future. (lp#512914)
  * bug fix: A deadline handler was run without interrupts enabled for a
    deadline signaled within SB-THREAD:CONDITION-WAIT. That could result
    in infinitely spinning, non-killable threads.
  * bug fix: Backtrace from internal-errors on x86-64 os x was truncated
    before reaching the erring stack frame.
  * bug fix: Fix type derivation for EXPT when raising a fixnum to a
    real power.  (launchpad bug lp#525949)
  * bug fix: Fix SB-EXT:GENERATION-* accessors for generations > 0 on
    GENCGC platforms.  (launchpad bug lp#529014)
  * bug fix: More robust checks for invalid DEFMETHOD argument specializers.
    (launchpad bug lp#525916)
  * bug fix: Fix building on Darwin when sysctl is not in the user's PATH.
    (Thanks to Robert Goldman)

changes in sbcl-1.0.35 relative to sbcl-1.0.34:
  * optimization: ROUND with a single single-float or double-float argument
    is properly inlined when possible.
  * optimization: Slightly better code is generated for integer<->float
    conversions and for single-float<->double-float conversions on x86-64.
  * optimization: SB-ROTATE-BYTE:ROTATE-BYTE now generates more efficient
    code for 32-bit and 64-bit rotations on x86-64.
  * bug fix: The install script changes the ownership of directories as well
    as files for contrib modules using asdf.  (thanks to Eugene Ossintsev;
    launchpad bug lp#508485)
  * bug fix: TRUNCATE with a single single-float or double-float argument is
    properly inlined when possible.  (launchpad bug lp#489388)
  * bug fix: Passing a rotation count of zero to SB-ROTATE-BYTE:ROTATE-BYTE
    no longer causes a compiler error on x86 and ppc.
  * bug fix: GET-MACRO-CHARACTER bogusly computed its second return value
    always relative to *READTABLE* rather than the passed argument.

changes in sbcl-1.0.34 relative to sbcl-1.0.33:
  * minor incompatible change: threading support is now enabled by default
    on x86[-64] Linux.
  * enhancement: SB-INTROSPECT:DEFTYPE-LAMBDA-LIST now also works on most
    builtin types.
  * enhancement: Errors during compile-time-too processing (i.e. EVAL-WHEN)
    are now caught and reported just like errors during macroexpansion.
  * enhancement: SB-POSIX now provides access to tcdrain(), tcflow(),
    tcflush(), tcgetsid(), and tcsendbreak(). (thanks to Jerry James)
  * enhancement: ASDF systems can now depends on SB-QUEUE.
  * fixes and improvements related to Unicode and external formats:
    ** bug fix: error handling and restart usage in the ucs-2 external format 
       has been improved.
    ** there is now an implementation of the ucs-4 external format.
    ** the utf-16 and utf-32 external formats are supported.
  * bug fix: SB-POSIX wrapper for putenv no longer tries to put lisp strings
    in the environment. setenv() and unsetenv() are also provided. (reported by
    Fare Rideau; launchpad bug lp#460455)
  * bug fix: LOAD of both .fasl and .FASL type files now forces fasl-style
    loading. This ensures sensible errors for .FASL files from other
    implementations on case-insensitive filesystems. (reported by Willem
    Broekema; launchpad bug lp#489417)
  * bug fix: #p"\\\\" can now be read without error on Win32.  (reported by
    Willem Broekema; launchpad bug lp#489698).
  * bug fix: some minor code rearrangements to reenable warning-free building
    from CMUCL (reported by xme@gmx.net; launchpad bug lp#491104)
  * bug fix: PRINT-OBJECT for clos instances respects the right margin when
    pretty printing
  * bug fix: FIND-PACKAGE & DEFPACKAGE were not thread safe. (reported by
    Attila Lendvai)

changes in sbcl-1.0.33 relative to sbcl-1.0.32:
  * new port: support added for x86-64 NetBSD.  (thanks to Aymeric Vincent)
  * improvement: support O_LARGEFILE access to files larger than 2GB on
    x86-64/linux.  (thanks to Daniel Janus; launchpad bug lp#453080)
  * new feature: SB-INTROSPECT:WHO-SPECIALIZES-DIRECTLY to get a list of
    definitions for methods specializing on the passed class itself. 
  * new feature: SB-INTROSPECT:WHO-SPECIALIZES-GENERALLY to get a list of
    definitions for methods specializing on the passed class itself, or on
    subclasses of it.
  * new build flag: :sb-xref-for-internals; SBCL will collect xref information
    about itself during the build (e.g. for M-? in Slime), if this flag is
    enabled in customize-target-features.lisp. This will increase the core
    size by about 5-6mb, though, so it's mostly interesting to SBCL
  * new feature: various GENCGC tuning parameters have been experimentally
    documented and exported from SB-EXT. See documentation for details.
  * fixes and improvements related to Unicode and external formats:
    ** the Unicode character database has been upgraded to the
       Unicode 5.2 standard, giving names and properties to a number of new
       characters, and providing a few extra characters with case
    ** improvement: restarts for providing replacement input/output on coding
       errors for fd-stream external formats.
    ** improvement: where :<encoding> is a keyword corresponding to an
       external format the system supports, it is now possible to specify
       (:<encoding> :replacement <character>) as an external format which will
       automatically substitute <character> on encoding or decoding errors for
       streams and for STRING-TO-OCTETS and its inverse.  (launchpad bug
    ** improvement: the file streams underlying the standard streams (such as
       *STANDARD-INPUT*, *TERMINAL-IO*) are opened with an external format 
       which uses the replacement mechanism to handle encoding errors,
       preventing various infinite error chains and unrecoverable I/O
    ** minor incompatible change: the utf-8 external format now correctly
       refuses to encode Lisp characters in the surrogate range (char-codes
       between #xd800 and #xdfff).
    ** fix a typo preventing conversion of strings into octet vectors
       in the latin-2 encoding.  (reported by Attila Lendvai; launchpad bug
    ** fix a bug in the octet multibyte handling of decoding errors and the
       USE-VALUE restart.  (launchpad bug lp#314939)
    ** fix the bug underlying the expected failure in the FORCE-END-OF-FILE
       restart on fd-stream decoding errors.
    ** fix a bug in the ATTEMPT-RESYNC fd-stream decoding restart when the
       error is near the end of file.
    ** fix a double-error case in unibyte octet conversions, when the first
       use of USE-VALUE is ignored.
    ** fix bugs in handling of undefined code points in unibyte encodings.
    ** fix LISTEN (and consequent hangs in READ-CHAR-NO-HANG) on bivalent
       streams after an UNREAD-CHAR.
  * enhancement: SB-INTROSPECT:ALLOCATION-INFORMATION also reports if the
    object is allocated in a boxed region of dynamic space.
  * enhancement: SB-POSIX:FORK now signals an error if an attempt to
    fork with multiple Lisp threads running is made, instead of going
    ahead with unpredictable consequences. (reported by Leslie Polzer)
  * bug fix: uses of slot accessors on specialized method parameters within
    the bodies of SLOT-VALUE-USING-CLASS methods no longer triggers a type
    error while finalizing the class.  This fix may cause classes with slot
    accessors to be finalized later than previously.  (reported by Lars Rune
    Nøstdal; launchpad bug lp#473699)
  * bug fix: restore buildability on the MIPS platform.  (regression from, reported by Samium Gromoff)
  * bug fix: inspecting closures is less likely to fail with a type error.
  * bug fix: no timer starvation when setting the system clock back.
    (launchpad bug lp#460283)
    standard pprint dispatch table as specified by CLHS.
  * bug fix: give CLISP a hint about a type declaration to enable it to build
    the cross-compiler without warnings.  (thanks to Josh Elasser; launchpad
    bug lp#396597)
  * bug fix: correctly dump literal objects in defaulting forms of arglists.
    (reported by Attila Lendvai; launchpad bug lp#310132)
  * bug fix: distinguish in type specifiers between arrays that might be
    complex and arrays that are definitely complex.  (launchpad bug lp#309129)
  * bug fix: SUBTYPEP knows that the SYMBOL type is not SUBTYPEP the KEYWORD
    type.  (reported by Levente Mészáros; launchpad bug lp#485972)
  * bug fix: setting the value of a symbol-macro within a method in the
    presence of type declarations works properly again.  (reported by Iban
    Hatchondo; launchpad bug lp#485019)

changes in sbcl-1.0.32 relative to sbcl-1.0.31:
  * optimization: faster FIND and POSITION on strings of unknown element type
    in high SPEED policies. (thanks to Karol Swietlicki)
  * optimization: faster CONCATENATE 'STRING in low SPEED policies (reported
    by David Vázquez)
  * improvement: better error signalling for bogus parameter specializer names
    in DEFMETHOD forms (reported by Pluijzer)
  * bug fix: DELETE-FILE once again works on logical pathnames (regression
  * bug fix: LOGICAL-PATHNAME signals a TYPE-ERROR if pathspec is specified
  * bug fix: redefinition of a class via DEFCLASS without :DEFAULT-INITARGS
    removes previous default initargs (reported by Lars Rune Nøstdal and
    Samium Gromoff)
  * bug fix: correct WHO-CALLS information for inlined lambdas with complex
    lambda-lists. (reported by Peter Seibel)
  * bug fix: SAVE-LISP-AND-DIE option :SAVE-RUNTIME-OPTIONS did not work
    correctly when starting from an executable core without saved runtime
    options (reported by Faré Rideau, thanks to Zach Beane)
  * bug fix: (SETF SLOT-VALUE) signalled a warning which should have been
    an optimization note instead. (reported by Martin Cracauer)
  * bug fix: WITH-SLOTS did not work with THE forms. (thanks to David Tolpin)
  * bug fix: Have RUN-PROGRAM with :INPUT T only run the subprocess in a
    new process group if it doesn't need to share stdin with the sbcl
    process. (thanks to Leslie Polzer)
  * bug fix: SATISFIES could be misoptimized to refer to a local function.
    (reported by Stanislaw Halik)

changes in sbcl-1.0.31 relative to sbcl-1.0.30:
  * improvement: stack allocation is should now be possible in all nested
    inlining cases: failure to stack allocate when equivalent code is manually
    open coded is now considered a bug.
  * improvements related to Unicode: 
    ** the Unicode character database has been upgraded to the
       Unicode 5.1 standard, giving names and properties to a number of new
       characters, and providing a few extra characters with case
    ** the system now recognizes and produces names for Unicode Hangul 
       syllable characters.
    ** the EBCDIC-US external-format is now supported for octet operations
       (as well as for stream operations).
  * new feature: experimental :EMIT-CFASL parameter to COMPILE-FILE can
    be used to output toplevel compile-time effects into a separate .CFASL
  * optimization: COERCE to VECTOR, STRING, SIMPLE-STRING and recognizable
    one-dimenstional subtypes of ARRAY is upto 70% faster when the coercion is
    actually needed.
  * optimization: TRUNCATE on known single- and double-floats is upto 25%
  * optimization: division of floating point numbers by constants uses
    multiplication by reciprocal when an exact reciprocal exists.
  * optimization: multiplication of single- and double-floats floats by
    constant two has been optimized.
  * optimization: ARRAY-IN-BOUNDS-P is resolved at compile-time when
    sufficient type information is available. (thanks to Leslie Polzer)
  * optimization: SLOT-VALUE and (SETF SLOT-VALUE) with constant slot names on
    known structure objects are as efficient as defstruct generated accessors.
  * optimization: unused vector creation can now be optimized away.
  * improvement: ASDF systems can now depends on SB-INTROSPECT.
  * improvement: a STYLE-WARNING is signalled when a generic function
    clobbers an earlier FTYPE proclamation.
  * improvement: the compiler is able to track the effective type of
    generic function across method addition and removal even in the
    absence of an explicit DEFGENERIC.
  * improvement: DESCRIBE now reports on symbols naming undefined
    but assumed or declared function as well.
  * improvement: recompilation of systems using SB-GROVEL now works
    (thanks to Leslie Polzer)
  * improvements to SB-CLTL2 (thanks to Larry D'Anna):
    ** AUGMENT-ENVIRONMENT and DEFINE-DECLARATION have been implemented.
    ** DECLARATION-INFORMATION now supports declaration name DECLARATION as
       well as user defined declaration names.
    ** VARIABLE-INFORMATION is now aware of alien variables.
  * improvement: improved address space layout on OpenBSD (thanks to Josh
  * improvement: pretty-printing of various Lisp forms has been improved
    (thanks to Tobias Rittweiler)
  * bug fix: calls to DECODE-FLOAT and INTEGER-DECODE-FLOAT whose value was
    unused were deleted in safe code. (reported by John Fremlin)
  * bug fix: a failing AVER compiling certain MAKE-ARRAY forms. (reported
    by James Wright)
  * bug fix: some out-of-line array predicates were missing (reported by
    Stelian Ionescu)
  * bug fix: a failing AVER in CONVERT-MV-CALL has been fixed. (thanks to
    Larry D'Anna)
  * bug fix: a failing AVER in %ALLOCATE-CLOSURES conversion has been fixed
    (thanks to Larry D'Anna)
  * bug fix: SLEEP supports times over 100 million seconds on long on OpenBSD
    as well. (reported by Josh Elsasser)
  * bug fix: DELETE-FILE on streams no longer closes the stream with :ABORT T,
    leading to possible attempts to delete the same file twice. See docstring
    on DELETE-FILE for details. (reported by John Fremlin)
  * bug fix: DELETE-FILE once again deletes the file named by the pathname
    designator argument, rather than its truename.  (reported by Luis
  * bug fix: the low-level debugger had 32-bit assumptions and was missing
    information about some array types. (thanks to Luis Oliveira)
  * bug fix: moderately complex combinations of inline expansions could
    be miscompiled if the result was declared to be dynamic extent.
  * bug fix: on x86, SAP-REF of sizes greater than 8 bits with offsets of the
    form (+ <variable> <integer>) were miscompiled under certain
  * bug fix: in some cases no compiler note about failure to stack allocate
    was emitted, even if the objects were in fact heap allocated.
  * bug fix: minor violation of "otherwise inaccessible" rule for stack
    allocation could cause objects users might reasonably expect to
    be heap allocated to be stack allocated.
  * bug fix: DESCRIBE signalled an error for generic functions under
    certain circumstances. (thanks to Leslie Polzer)
  * bug fix: Fixed spelling of an error message.

changes in sbcl-1.0.30 relative to sbcl-1.0.29:
  * minor incompatible change: SB-THREAD:JOIN-THREAD-ERROR-THREAD and
    SB-THREAD:INTERRUPT-THREAD-ERROR-THREAD have been deprecated in favor
  * new contrib module: SB-QUEUE provides thread-safe lockless FIFO queues.
  * new feature: docstrings for local and anonymous functions are no longer
    discarded. (thanks to Leslie Polzer)
  * new feature: SB-THREAD:SYMBOL-VALUE-IN-THREAD provides access to symbol
    values in other threads.
  * new feature: SB-INTROSPECT:ALLOCATION-INFORMATION provides information
    about object allocation.
  * optimization: division of a real float by a complex float is implemented
    with a specialised code sequence.
  * optimization: MAKE-INSTANCE with non-constant class-argument but constant
    keywords is an order of magnitude faster.
  * optimization: MAKE-INSTANCE with constant keyword arguments is x2-4 faster
    in the presence of :AROUND or non-standard primary INITIALIZE-INSTANCE
    methods, and similarly for non-standard metaclass classes as long as there
    are no methods additional on MAKE-INSTANCE.
  * optimization: more efficient type-checks for FIXNUMs when the value
    is known to be a signed word on x86 and x86-64.
  * optimization: compiler now optimizes (EXPT -1 INTEGER), (EXPT -1.0 INTEGER),
    and (EXPT -1.0d0 INTEGER) into an ODDP test. (thanks to Stas Boukarev and
    Paul Khuong)
  * optimization: compiler is smarter about delegating argument type checks to
  * optimization: several character functions are now compiled somewhat more
    efficiently. (reported by Lynn Quam)
  * optimization: the compiler now derives simple types for LOAD-VALUE-FORMs.
  * improvement: less unsafe constant folding in floating point arithmetic,
    especially for mixed complex/real -float operations.
  * optimization: constant double and single floats are stored in native
    unboxed format on x86[-64].
  * optimization: smarter code for arithmetic operations with constant floats,
    complex floats, or integers on x86[-64].
  * optimization: smarter code for conjugate/multiplication of float complexes
    and abs/negate of floats on x86-64.
  * optimization: more efficient complex float and real float operations on
  * improvement: complex float division is slightly more stable.
  * improvement: DESCRIBE output has been reworked to be easier to read and
    contains more pertinent information.
  * improvement: failure to provide requested stack allocation compiler notes
    provided in all cases (requested stack allocation not happening without a
    note being issued is now considered a bug.)
  * bug fix: SB-POSIX exports the documented types and functions
    FILE-DESCRIPTOR and FILENAME, and also the corresponding -DESCRIPTOR
    types. (reported by "abhi")
  * bug fix: on 64 bit platforms FILL worked incorrectly on arrays with
    upgraded element type (COMPLEX SINGLE-FLOAT), regression from
    (thanks to Paul Khuong)
  * bug fix: looping around HANDLER-CASE could silently consume stack space
    on each iteration. (reported by "foobar")
  * bug fix: better error signalling when calls to functions seeking elements
    from lists (eg. ADJOIN) are compiled with both :TEST and :TEST-NOT.
    (reported by Tobias Rittweiler)
  * bug fix: regressions in DIRECTORY from pattern matching of
    directory components now works as it used to. (various prolems reported by
    Michael Becker, Gabriel Dos Reis, Cyrus Harmon, and Harald Hanche-Olsen)
  * bug fix: :PTY option in RUN-PROGRAM was broken with stream arguments.
    (reported by Elliot Slaughter, thanks to Stas Boukarev)
  * bug fix: bogus undefined variable warnings from fopcompiled references to
    global variables. (thanks to Lars Rune Nøstdal)
  * bug fix: foreign function names should now appear in backtraces on
    FC6 as well. (reported by Tomasz Skutnik and Tobias Rautenkranz)
  * bug fix: SETF compiler macro documentation strings are not discarded
  * bug fix: GENTEMP is now unaffected by pretty printer dispatch table.
    (thanks to Alex Plotnick)
  * bug fix: SLEEP accepts large integer arguments, truncating them to
    SIGNED-WORD on the assumption that sleeping for 68 years is sufficient
    for anyone. (reported by Leslie Polzer, thanks to Stas Boukarev)
  * bug fix: compiler notes for expensive slot type checks could be emitted
    at runtime MAKE-INSTANCE calls. (reported by Samium Gromoff)

changes in sbcl-1.0.29 relative to 1.0.28:
  * IMPORTANT: bug database has moved from the BUGS file to Launchpad
    Bugs can be reported directly there, or by sending email to
    (no subscription required.)
  * minor incompatible change: under weak type checking policy integer
    types are weakened less aggressively.
  * minor incompatible change: SAVE-LISP-AND-DIE :TOPLEVEL function is now
    allowed to return, which causes SBCL to quit with exit status 0. Previously
    if the function returned with a small integer return value, that value
    was accidentally reused as the exit status.
  * new feature: SB-EXT:DEFINE-HASH-TABLE-TEST allows defining new arguments
    to MAKE-HASH-TABLE :TEST, and MAKE-HASH-TABLE has been extended with
    :HASH-FUNCTION argument. Refer to user manual for details.
  * new feature: SB-EXT:DEFGLOBAL macro allows defining global non-special
  * new feature: SB-EXT:GET-TIME-OF-DAY provides access to seconds and
    microseconds since the Unix epoch on all platforms.
  * new feature: SB-EXT:ALWAYS-BOUND proclamation inhibits MAKUNBOUND, and
    allows the compiler to safely elide boundedness checks for special
  * new feature: SB-EXT:GLOBAL proclamation inhibits SPECIAL proclamations for
    the symbol, prohibits both lexical and dynamic binding. This is mainly an
    efficiency measure for threaded platforms, but also valueable in
    expressing intent.
  * new feature: UNC pathnames are now understood by the system on Windows.
  * optimization: the compiler uses a specialized version of FILL when the
    element type is know in more cases, making eg. (UNSIGNED-BYTE 8) case
    almost 90% faster.
  * optimization: accesses to potentially non-simple arrays where element type
    is known are 50% faster.
  * optimization: compiler now generates faster array typechecking code.
  * optimization: ARRAY-DIMENSION is now faster for multidimensional and
    non-simple arrays.
  * optimization: multidimensional array accesses in the absence of type
    information regarding array rank are approximately 10% faster due to
    open coding of ARRAY-RANK.
  * optimization: result of (FILL (MAKE-ARRAY ...) ...) and (REPLACE
    (MAKE-ARRAY ...) ...) can be stack allocated if the result of MAKE-ARRAY
    form can be.
  * optimization: result of call to VECTOR can now be stack allocated.
  * optimization: MAKE-ARRAY with :INITIAL-CONTENTS is now vastly faster
    as long as the resulting array is one-dimensional and has a known
    element type. In particular, :INITIAL-CONTENTS (LIST ...) where the
    length of the list matches the known length of the vector does not
    allocate the list as an intermediate step. Ditto for VECTOR and simple
    backquoted forms.
  * optimization: MAKE-ARRAY can now stack allocate in the presence of
    :INITIAL-CONTENTS and :INITIAL-ELEMENT as long as the result has a
    known element type, and is known to be simple and one dimensional.
  * improvement: SBCL now emits a compiler note where stack allocation was
    requested but could not be provided (not in all cases, unfortunately)
  * improvement: better MACHINE-VERSION responses. (thanks to Josh Elsasser)
  * improvement: pretty-printing loop has been implemented properly. (thanks
    to Tobias Rittweiler)
  * documentation: CLOS slot typechecing policy has been documented.
  * bug fix: FILE-AUTHOR no longer signals an error on Windows.
  * bug fix: SB-SPROF could be foiled by foreign code not have a frame
    pointer, leading to memory faults. (thanks to Bart Botta)
  * bug fix: better floating point exception handling on x86/OpenBSD.
    (thanks to Josh Elsasser)
  * bug fix: exit status from QUIT when called under --script was lost
    (reported by Hubert Kauker)
  * bug fix: MAKE-ARRAY for non-zero :INITIAL-ELEMENT always used the
    same implementation of FILL to initialize the array, even if a more
    efficient one was available (reported by Stas Boukarev, thanks to
    Paul Khuong)
  * bug fix: potential miscompilation of array stack allocation on x86 and
    x86-64. (reported by Time Tossavainen)
  * bug fix: some forms of AND, OR, and COND resulted in expansions that could
    result in their subforms being treated as top level forms. (reported by
    James Knight)
  * bug fix: On x86/x86-64 alien functions declared to return integers shorter
    than a machine register could leave garbage in the high bits of the
    result register (bug 316325).
  * bug fix: disable address space randomization Linux/x86-64 as well,
    not just x86-64. (reported by Ken Olum)
  * bug fix: Attempting to DEREF an (ALIEN (* T)) would produce a WARNING and
    generate incorrect code.
  * bug fix: #201; type inference for CONS and ARRAY types could derive
    wrong results in the presence of eg. RPLACA or ADJUST-ARRAY.
  * bug fix: special variables with a proclaimed specific subtype of FUNCTION
    could not be assigned to or bound with PROGV. (reported by Lorenz
  * bug fix: the value of CL:- in the inspector was the previous expression
    evaluated rather than the expression being evaluated.
  * bug fix: constants can no longer be locally declared special.
  * bug fix: signals delivered to threads started from foreign land (read:
    directly by pthread_create, not by MAKE-THREAD) are redirected to a Lisp
    thread by blocking all signals and resignalling.
  * bug fix: SHARED-INITIALIZE initialized unbound :ALLOCATION :CLASS slots
    from :INITFORM, if any.

changes in sbcl-1.0.28 relative to 1.0.27:
  * a number of bugs in cross-compilation have been fixed, with the ultimate
    result that building under (at least) clisp should be much more reliable.
  * minor incompatible changes: echo-streams now propagate unread-char to the
    underlying input stream, and no longer permit unreading more than one
  * improvement: on x86/x86-64 Lisp call frames now have the same layout as C
    frames, allowing for instance more reliable backtraces.
  * improvement: the debugger REPL can now reference lexical variables
    by name directly for code compiled with (DEBUG 3).
  * improvement: errors from malformed declarations now have better source
    paths associated with them. (thanks to Tobias Rittweiler)
  * optimization: faster local calls on x86/x86-64
  * bug fix: some error messages for out-of-bound array indexes confused the
    index and the bound. (thanks to Stas Boukarev)
  * bug fix: pretty printing malformed DEFPACKAGE forms (thanks to Sidney
  * bug fix: running regressions tests in shells without OSTYPE set now works.
    (reported by Harald Hanche-Olsen)
  * bug fix: more robust static space exhaustion signalling from
    MAKE-STATIC-VECTOR (thanks to Daniel Lowe)
  * bug fix: (SETF DOCUMENTATION) for anonymous function now throws the
    docstring away instead of storing it under names such as (LAMBDA (X)).
    (reported by Leslie Polzer)
  * bug fix: timers could go off in the wrong order, be delayed indefinitely
    (thanks to Ole Arndt for the patch)
  * bug fix: RESTART-FRAME and RETURN-FROM-FRAME stack corruption
  * bug fix: the discriminating function for PRINT-OBJECT no longer preserves
    potentially-invalid effective methods in its cache.
  * bug fix: SB-INTROSPECT:FIND-DEFINITION-SOURCE now works with funcallable
    instances as well (thanks to Paul Khuong)
  * bug fix: using RUN-PROGRAM does not interfere with SB-POSIX:WAIT,
    SB-POSIX:WAITPID and their C equivalents.
  * bug fix: RUN-PROGRAM does not crash on Darwin when stressed.

changes in sbcl-1.0.27 relative to 1.0.26:
  * new port: support added for x86-64 OpenBSD. (thanks to Josh Elsasser)
  * new port: support added for x86-64 Solaris. (thanks to Alex Viskovatoff)
  * improvement: the system either recovers from stack exhaustion or dies
    properly as opposed to leaving the user uncertain of whether the handler
    trampled on some random memory next to the stack or having to rely on
    --lose-on-corruption (which is still a good idea to use in production
    because stack exhaustion can happen in signal handlers which will likely
    lead to hangs.)
  * bug fix: fix gc related interrupt handling bug on ppc (regression from, reported by Harald Hanche-Olsen)
  * bug fix: work around signal delivery bug in darwin (regression from, reported by Sidney Markowitz)
  * bug fix: fix ERROR leaking memory (reported by David Thompson)

changes in sbcl-1.0.26 relative to 1.0.25:
  * incompatible change: an interruption (be it a function passed to
    INTERRUPT-THREAD or a timer function) runs in an environment where
    interrupts can be enabled. The interruption can use
    WITHOUT-INTERRUPTS to avoid nesting of interruptions and
    potentially running out of stack. Keep in mind that in the absence
    of WITHOUT-INTERRUPTS some potentially blocking operation such as
    acquiring a lock can enable interrupts.
  * incompatible change: GC-OFF and GC-ON are removed, as they were
    always unsafe. Use WITHOUT-GCING instead.
  * new feature: runtime option --disable-ldb
  * new feature: runtime option --lose-on-corruption to die at the
    slightest hint of possibly non-recoverable errors: running out of
    memory, stack, alien stack, binding stack, encountering a memory
    fault, etc. In the absence of --lose-on-corruption a warning is
    printed to stderr.
  * enhancement: detect binding stack exhaustion
  * enhancement: detect alien stack exhaustion on x86/x86-64
  * improvement: generally more stable and reliable interrupt handling
  * improvement: there is a per thread interruption queue,
    interruptions are executed in order of arrival
  * improvement: a repeating timer reschedules itself when the it has
    finished, but expiration times are spaced equally. If an
    expiration time is in the past it will trigger after a short grace
    period that may give a chance to other things to run.
  * optimization: slightly faster gc on multithreaded builds
  * optimization: faster WITHOUT-GCING
  * bug fix: when JOIN-THREAD signals an error, do it when not holding
    important locks so that the debugger/handler doesn't produce
    recursive errors or deadlock.
  * bug fix: real-time signals are not used anymore, so no more
    hanging when the system wide real-time signal queue gets full.
  * bug fix: INTERRUPT-THREAD on a dying thread could produce memory
  * bug fix: finalizers, gc hooks never run in a WITHOUT-INTERRUPTS
  * bug fix: fix random memory faults related to interrupts on alpha
  * bug fix: fix random memory faults related to interrupts on sparc
  * bug fix: fix deadlocks related to starting threads
  * bug fix: fix deadlines on locks on futex platforms
  * bug fix: restore errno in signal handlers
  * bug fix: fix deadlocks related to hash tables
  * bug fix: fix deadlocks in pcl

changes in sbcl-1.0.25 relative to 1.0.24:
  * incompatible change: SB-INTROSPECT:FUNCTION-ARGLIST is deprecated, to be
    removed later. Please use SB-INTROSPECT:FUNCTION-LAMBDA-LIST instead.
  * new feature: SB-INTROSPECT:DEFTYPE-LAMBDA-LIST allows retrieval of
    DEFTYPE lambda lists. (thanks to Tobias Rittweiler)
  * enhancement: MUTEX-VALUE is to be superseded by MUTEX-OWNER that has a
    better name and does not return values so stale on multiprocessor systems.
    Also, HOLDING-MUTEX-P was added for about the only sane usage of
  * improvement: unithread builds keep track of MUTEX-VALUE.
  * improvement: reading from a TWO-WAY-STREAM does not touch the output
    stream anymore making it thread safe to have a concurrent reader and
    a writer, for instance, in a pipe.
  * improvement: GET-SETF-EXPANDER avoids adding bindings for constant
    arguments, making compiler-macros for SETF-functions able to inspect
    their constant arguments.
  * improvement: COMPILE-FILE reports times with millisecond accuracy
    (thanks to Luis Oliveira)
  * optimization: CHAR-CODE type derivation has been improved, making
    TYPEP elimination on subtypes of CHARACTER work better. (reported
    by Tobias Rittweiler, patch by Paul Khuong)
  * bug fix: setting alien structure fields of type struct by value now
    computes the right offset for the memory copy.
  * bug fix: compilation problem involving inlined calls to aliens with
    result type VOID. (reported by Ken Olum)
  * bug fix: #235a; sequential inline expasion in different policies no
    longer reuses the functional from the previous expansion site.
  * bug fix: DEFTYPE no longer breaks on bodies consisting of a single
    unquoted symbol. Regression from (reported by Ariel Badichi)
  * bug fix: named ENUMs in multiply-referenced alien record types no longer
    cause an implied type redefinition.  Regression from
  * bug fix: sign-extension of small signed return values now works with C
    code compiled with gcc 4.3 or newer. (reported by Liam Healy)
  * improvements to the Windows port:
    ** SB-BSD-SOCKETS now works from saved cores as well. (reported by Stephen
       Westfold, thanks to Rudi Schlatte)

changes in sbcl-1.0.24 relative to 1.0.23:
  * new feature: ARRAY-STORAGE-VECTOR provides access to the underlying data
    vector of a multidimensional SIMPLE-ARRAY.
  * new feature: the system now signals a continuable error if standard
    readtable modification is attempted. (thanks to Tobias Rittweiler)
  * new feature: DIRECTORY has been extended with a non-standard keyword
    argument :RESOLVE-SYMLINKS. (thanks to TC-Rucho)
  * enhancement: SB-BSD-SOCKETS:MAKE-SOCKET-STREAM keyword argument handling
    has been robustified and documented better. (thanks to Robert Goldman)
  * optimization: faster generic arithmetic dispatch on x86 and x86-64.
  * optimization: FORMAT ~D and ~F are now approximately 5% faster.
  * tradeoff: constant FORMAT control strings are now compiled unless
    SPACE > SPEED (previously only when SPEED > SPACE.)
  * bug fix: Red Hat Enterprise 3 mmap randomization workaround. (thanks
    to Thomas Burdick)
  * bug fix: DEFCLASS and ENSURE-CLASS-USING-CLASS are now expected to
    be thread safe.
  * bug fix: lexical type declarations are now correctly reported by
    SB-CLTL2. (reported by Larry D'Anna)
  * bug fix: STRING-TO-OCTETS did not handle :START properly when
    using UTF-8 as external format. (thanks to Luis Oliveira)
  * bug fix: errors from invalid fill-pointer values to (SETF FILL-POINTER)
    are signalled correctly. (thanks to Stas Boukarev)
  * bug fix: SET-MACRO-CHARACTER accepts NIL as the readtable
    designator. (thanks to Tobias Rittweiler)
  * bug fix: SET-DISPATCH-MACRO-CHARACTER accepts NIL as the readtable
    designator, and returns T instead of the function. (thanks to
    Tobias Rittweiler)
  * bug fix: direct superclasses of STANDARD-CLASS and
  * bug fix: compiling a call to SLOT-VALUE with a constant slot-name
    when no class with the named slot yet exists no longer causes a
    compile-time style-warning.
  * bug fix: :ALLOCATION :CLASS slots are type-checked properly
    in safe code. (reported by Didier Verna)
  * bug fix: #430; nested structure constructors can stack allocate.
  * bug fix: on some 64-bit platforms dynamic space size was truncated
    to #xffff0000 bytes. (reported by Benjamin Lambert)
  * bug fix: setting *READ-SUPPRESS* to T no longer renders the default
    REPL unusable. (reported by Daniel Herring)
  * bug fix: return values of READ-SEQUENCE did not take :START into
    account on file streams, regressions since (reported by
    Thomas Russ, patch by Paul Khuong)
  * bug fix: using SET or (SETF SYMBOL-VALUE) to change the value of a
    method specializer used to confuse permuation vector optimization.
  * bug fix: system inserted bogus implicit type declarations for local
    special variables in DEFMETHOD bodies.
  * bug fix: #354; duplicated frames in backtraces due to
    non-tail-call-optimized XEPs to functions with return type NIL
    have been elimited.
    initializes structure object slots according to DEFSTRUCT initforms,
    and DEFSTRUCT forms :INCLUDEind structure classes defined using
    DEFCLASS :METACLASS STRUCTURE-CLASS now inherit their initforms.
    (reported by Bruno Haible and Stephen Wilson)
  * bug fix: #395; fill-pointer output streams used now support
    element-type BASE-CHAR as well.
  * bug fix: compiler error when attempting to derive return value of
    ARRAY-ELEMENT-TYPE when the array type was a union of intersection
  * bug fix: address-spaces overlapped on OpenBSD. (thanks to Josh
  * bug fix: Mac OS X binaries should now be portable between Leopard
    and Tiger.

changes in sbcl-1.0.23 relative to 1.0.22:
  * enhancement: when disassembling method functions, disassembly
    for the associated fast function is also produced.
  * enhancement: system stores DEFTYPE lambda-lists, so DESCRIBE can
    report them.
  * optimization: printing with *PRINT-PRETTY* true is now more
    efficient as long as the object being printed doesn't require
    special handling by the pretty printer.
  * bug fix: slot symbol-macros from WITH-SLOTS inside DEFMETHOD bodies
    now interact correctly with type declarations.
  * partial bug fix: PCL detects infinite recursion during wrapper
    validation. (thanks to Attila Lendvai)
  * bug fix: #426; nested function calls are inlined properly.
    Previously if FOO was an inline function, in calls of the form
    (FOO (FOO ...)) the outer call was not inlined.
  * bug fix: long long arguments passed in registers to alien
    functions on PowerPC Linux and NetBSD are now handled correctly
    when preceded by SYSTEM-AREA-POINTERs. (reported by Josh Elsasser)

changes in sbcl-1.0.22 relative to 1.0.21:
  * minor incompatible change: LOAD-SHARED-OBJECT no longer by default looks
    for the shared object in the current directory, but passes the native
    namestring of the designated pathname to the operation system's shared
    object loading function as-it.
  * minor incompatible change: --disable-debugger toplevel option now takes
    effect before processing of initialization files and --eval or --load
  * new feature: new commandline argument: --script, which supports
    shebang lines. See documentation for details. (based on work by
    Kevin Reid)
  * new feature: SAVE-LISP-AND-DIE can save current values of
    --dynamic-space-size and --control-stack-size in the executable core,
    causing it to skip normal runtime option processing. See documentation
    for details. (thanks to Zach Beane)
  * enhancement: inoccous calls to EVAL or generic functions dispatching
    on subclasses of eg. STREAM no longer cause compiler notes to appear.
  * enhancement: the system no longer resignals errors from --load and
    --eval toplevel arguments as SIMPLE-ERRORS, which caused restarts
    associated with the original error to be lost. (thanks to Ariel
  * enhancement: :DONT-SAVE keyword argument has been added to
    LOAD-SHARED-OBJECT for controlling interaction with
    SAVE-LISP-AND-DIE, and UNLOAD-SHARED-OBJECT can be used to undo
    the effects of an earlier LOAD-SHARED-OBJECT call.
  * bug fix: ADJUST-ARRAY on multidimensional arrays used bogusly give
    them a fill pointer unless :DISPLACED-TO or :INITIAL-CONTENTS were
    provided. (reported by Cedric St-Jean)
  * bug fix: circularity handling in the reader did not treat raw
    structure slots correctly. (reported by Cedric St-Jean)
  * bug fix: SERVE-EVENT occasionally signaled an error about bogus
    file descriptors when there were none.
  * bug fix: DEFINE-COMPILER-MACRO support of destructuring lambda-lists
    was broken. (reporteed by Willem Broekema)
  * bug fix: SB-EXT:NATIVE-NAMESTRING on Windows did not work on
    pathnames without a directory.
  * bug fix: COMPILE-FILE did not warn about undefined variable
    references at toplevel, and LOAD of the resulting fasl did
    not signal an error.
  * bug fix: functions with non-required arguments used to end up with
    (SB-C::&OPTIONAL-DISPATCH ...) as their name.
  * bug fix: redefining a function with non-required arguments didn't
    update the system's knowledge about its call signature properly.
  * bug fix: fixed #431; incompatible alien record type redefinitions
    are detected and handled. (reported by Neil Haven)
  * bug fix: using RESTRICT-COMPILER-POLICY with DEBUG 3 could cause
    PROGV miscompilation. (reported by Matthias Benkard, patch by Juho
  * bug fix: on x86 and x86-64 backtraces were sometimes truncated
    after alien stack frames.
  * bug fix: strings passed to mk{s,d}temp lacked null termination

changes in sbcl-1.0.21 relative to 1.0.20:
  * new feature: the compiler is able to track the effective type of a
    generic function across method addition and removal.
  * new feature: SB-EXT:ATOMIC-INCF allows atomic incrementation of
    appropriately typed structure slots without locking.
  * new feature: SB-EXT:CALL-WITH-TIMING provides access to timing
    information like those gathered by TIME using a programming-friendly
  * new feature: TIME reports time taken even if the form performs a
    non-local transfer of control.
  * enhancement: reduced conservativism on GENCGC platforms: on
    average 45% less pages pinned (measured from SBCL self build).
  * bug fix: SB-EXT:COMPARE-AND-SWAP on SYMBOL-VALUE can no longer
    mutate constant symbols or violate declaimed type of the symbol.
  * bug fix: SB-THREAD:SIGNAL-SEMAPHORE could fail to wakeup threads
    sleeping on the semaphore in heavily contested semaphores.
  * bug fix: semaphores and condition variables were not interrupt
  * bug fix: SB-THREAD:CONDITION-WAIT doesn't allow waits on mutexes
    owned by other threads anymore.
  * bug fix: FIND on lists called KEY outside the specified
    subsequence. (reported by budden)
  * bug fix: LOG doesn't use single-float intermediate results when
    given mixed integer and double-float arguments, leading to better
    precision. (reported by Bob Felts)
  * bug fix: LOG with base zero returned values of inconsistent type.

changes in sbcl-1.0.20 relative to 1.0.19:
  * minor incompatible change: OPTIMIZE qualities
  * documentation: some slot access efficiency guidelines have been
    added to the user manual.
    as ASSOC and MEMEBER.
    to more efficient EQ-comparison versions more often.
  * optimization: enhanced derivation of DOLIST iteration variable type
    for constant lists.
  * optimization: runtime lookup of function definitions can be
  * optimization: compiler is able to derive the return type of
    work. (thanks to Alec Berryman)
  * optimization: REPLACE deftransforms don't punt when :START1 or
    :START2 is given
  * bug fix: compiling DESTRUCTURING-BIND on constant list arguments
    no longer emits a code deletion note. (reported by Andrew
    arguments appeared at call sites as well.
    by Damien Cassou)
    breakage. (reported by Stelian Ionescu, Andy Hefner and Stanislaw
    alien-stack leakage. (reported by Andy Hefner)
    type of a variable or bind a constant is made.
    type of a variable is made.
  * bug fix: restart computation during the execution of a restart
    test function no longer causes infinite recursion. (reported by
    Michael Weber)
    signals an error. (thanks to Pierre Mai)
  * bug fix: EXPORT left symbol unexported in conflict situations.
    (thanks to Michael Weber)
  * bug fix: correctly handle name conflicts involving CL:NIL.
    (thanks to Michael Weber)
  * bug fix: RESOLVE-CONFLICT restart for name conflicts handles
    conflicts arising from USEing package with conflicting symbols
    correctly. (thanks to Michael Weber)

changes in sbcl-1.0.19 relative to 1.0.18:
    warnings that go otherwise unhandled will be muffled if they are
    of the type that's the value of this variable.  
  * optimization: stack allocation is slightly more efficient on x86
    and x86-64.
    where a raw slot always is initialized using the initform whose
    correctly. (reported by John Morrison)
  * bug fix: compiler no longer makes erronous assumptions in the
    presence of non-foldable SATISFIES types.
  * bug fix: stack analysis missed cleanups of dynamic-extent
    arguments in non-let-converted calls to local functions.
  * improvements to the Windows port:
    ** adjusted address spaces for building on both Win32 and
       Win64. (thanks for John Connors)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** interval arithmetic during type derivation used inexact integer
       to single-float coercions.
    ** arithmetic operations involving large integers and single
       floats give the same results in compiled and interpreted code.
       if the derived type of the second argument is a MEMBER type
       containing invalid type specifiers.
    ** ADJOIN with constant NIL as second argument works correctly.

changes in sbcl-1.0.18 relative to 1.0.17:
    profiles only the current thread.
  * minor incompatible change: changes to SYMBOL-VALUE of constants
    defined with DEFCONSTANT now signal an error.
    and is also able to profile specific threads. REPORT output
    has also additional sorting options.
    to Michael Weber)
  * optimization: structure allocation has been improved
    ** out of line constructors are ~10% faster.
    ** inline constructors are ~15% faster.
    ** inline constructors are capable of dynamic extent allocation
       as well.)
    longer cons.
    are never referenced through SYMBOL-VALUE at runtime.
    in sb-bsd-sockets.
    fasl is now deleted. (reported by Attila Lendvai)
    (reported by Yoshinori Tahara)
  * bug fix: more accurate disassembly annotations of foreign function
    calls.  (thanks to Andy Hefner)
    designators when the there is nothing to trim works properly.
    (thanks to James Knight)
    (thanks to Travis Cross)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** NIL is a valid function name (regression at
       fill pointers properly (regression at
       displacement indices properly (regression at   

changes in sbcl-1.0.17 relative to 1.0.16:
  * temporary regression: user code can no longer allocate closure
    variable storage on stack, due to bug 419 without explicitly
    use this feature in the meanwhile.
    adjust thread default control stack size.
  * enhancement: improved TIME output
    ** all times are reported using the measured accuracy (milliseconds
       for real and GC times, microseconds for everything else.)
    ** processor cycle counts on x86 and x86-64.
    ** interpreted forms are counted for both evaluator modes.
    ** number of lambdas converted by the compiler is reported.
    ** more comprehensive run time reporting, using a condenced format
       when zero.
    SPEED policies.
    in normal SPEED policies.
    in normal SPEED policies.
    to Sidney Markowitz)
    regression since (thanks to Eric Marsden)
    since (thanks to Paul Khuong)
    as the second argument.
  * bug fix: dynamic extent allocation of nested lists and vectors
    could leak to otherwise accessible parts.
  * bug fix: invalid optimization of heap-allocated alien variable
  * bug fix: fasl header checking is less vulnerable to different
    platform word lengths.
    Andreas Franke)
    declarations) successfully.  (reported by Attila Lendvai)

changes in sbcl-1.0.16 relative to 1.0.15:
    signaling added in 1.0.14.
  * minor incompatible change: change PROBE-FILE back to returning
    inherits from ERROR instead of just CONDITION.
    as well. (thanks to Tobias Rittweiler)
  * optimization: binding special variables now generates smaller code
    on threaded platforms.
  * optimization: better LOGNOT on fixnums.
  * optimization: modular arithmetic for a particular requested width
    is implemented using a tagged representation unless a better 
    representation is available.
    for wellformedness and returns a specialized vector. (reported by
    Francois-Rene Rideau)
    unscheduling timer at the same time as another timer fires.
  * bug fix: don't reschedule timers for dead threads.
    bogus errors if select() was interrupted.

changes in sbcl-1.0.15 relative to sbcl-1.0.14:
  * enhancement: cleaner backtraces for interactive interrupts, as
    well as other cases where the interesting frames used to be
    obscured by interrupt handling frames.
    traces SETF-functions as well.
  * enhancement: implement SB-POSIX:MKTEMP and SB-POSIX:MKDTEMP.
  * unreadably printed representation of hash-tables now includes
    weakness if any.
    is now more efficient.
    'DOUBLE-FLOAT) are not flushable.
    control variables.  (reported by Cedric St-Jean)
    keyword with MAKE-HASH-TABLE.
  * bug fix: export SB-POSIX:MKSTEMP.
  * bug fix: SORT was not interrupt safe.
  * bug fix: MAKE-INSTANCE optimizations interacted badly with
    methods on SHARED-INITIALIZE.  (thanks to Matt Marjanovic)
    create obsolete instances in the case of redefinition or
    obsoletion of a superclass.  (thanks to Andy Hefner)
    suffered somewhat from lack of maintenance since sbcl-1.0.
  * improvements to the Windows port:

changes in sbcl-1.0.14 relative to sbcl-1.0.13:
    (see documentation for details.)
  * revived support for OpenBSD (contributed by Josh Elsasser)
    (AVER (SAP= CURRENT END)) failures.
    Vincent Arkesteijn)
    the bug in TRUNCATE.) (reported by Michael Weber)
    no samples. (reported by Andy Hefner)
    Maciej Katafiasz)
    yet been finalized. (reported by Levente Meszaros)
    SBCL-specific optimize qualities.

changes in sbcl-1.0.13 relative to sbcl-1.0.12:
    needs that search behavior (see the manual).
  * minor incompatible change: compiler policy re. weakening type
    and SAFETY < SPEED.
    unparsing of directory pathnames as files. Analogously,
    filename to parse into a directory pathname.
  * enhancement: implicit generic function creation now signals a
    users can bind handlers for and muffle around calls to LOAD.
  * enhancement: RUN-PROGRAM allows unicode arguments and environments
    strings and vectors whose element-type or simplicity is not fully
    known at compile-time.
  * optimization: STRING-TRIM and related functions no longer allocate
    are also faster than before when the input string has been declared
    as a simple-string.
  * optimization: READ-LINE is significantly faster for files containing
    long lines.
  * optimization: non-open coded uses of character comparison operators
    on platforms supporting dynamic-extent allocation.
    lists in safe code.
  * bug fix: some sequence functions elided bounds checking when
  * bug fix: more bogus fixnum declarations in ROOM implementation
    have been fixed.

changes in sbcl-1.0.12 relative to sbcl-1.0.11:
    :SYNCHRONIZED argument, which makes the hash-table safe for
    concurrent accesses (but not iteration.) See also:
  * optimization: CONCATENATE on strings is an order of magnitude faster
    in code compiled with (> SPEED SPACE).
  * optimization: SUBSEQ is ~50% faster on lists.
    END is smaller then START.
    calls to profiled functions.
  * bug fix: ROOM implementation had bogus fixnum declarations which
    could cause type-errors when calling ROOM on large images.
    hash-table usage have been fixed.
    be returned from its body when the values were being returned
    inside an UNWIND-PROTECT.
    slime to work again.

changes in sbcl-1.0.11 relative to sbcl-1.0.10:
  * incompatible change: hash-table accessor functions are no longer
    from multiple threads can give inconsistent results or even corrupt the
    locking at the correct granularity. In the current implementation it is
    guaranteed that this property will be maintained in future releases.
    and will signal an error at runtime.
  * enhancement: CONS can now stack-allocate on x86 and
    CONS did not.)
  * enhancement: nested lists can now be stack allocated on
    platforms providing stack allocation support.
  * enhancement: dynamic-extent support has been extended to support
    cases where there are multiple possible sources for the stack
    allocated value.
    if the mutex is uncontested on Linux.
    as specified by the CLHS. (thanks to Tobias Rittweiler)
  * bug fix: instances of non-standard metaclasses using standard
    instance structure protocol sometimes missed the slot type checks
    in safe code.

changes in sbcl-1.0.10 relative to sbcl-1.0.9:
  * minor incompatible change: the MSI installer on Windows no longer
    associates .lisp and .fasl files with the installed SBCL.
    on Windows. (thanks to Luis Oliviera)
  * new feature: SB-CLTL2 contrib module now implements
    FUNCTION-INFORMATION. (thanks to Larry D'Anna)
  * optimization: scavenging weak pointers is now more efficient,
    scanvenged vs. unscavenged pointers. (thanks to Paul Khuong)
    method bodies using constant slot-names when the first argument is
    a specializer parameter for the method.
    names, when the class of the instance is a direct instance
    as slow as the constant slot-name case.)
    of O(N^2).
    now more readable in environments like Slime which display it.
    (thanks to Tobias C. Rittweiler)  
    the CAS operation was being performed.
  * bug fix: copy propagation interfered with parallel assignment
    semantics in local calls. (reported by Paul Khuong)
    PFD's random tests)

changes in sbcl-1.0.9 relative to sbcl-1.0.8:
    is called.
    and generic function now print the object identity for anonymous
    instances. (thanks to Attila Lendvai)
    (thanks to Attila Lendvai)
    which forms were instrumented by the compiler.
    by printer control variables. (reported by Dan Corkill)
    after the write could end up with the modified state written to
    the underlying file descriptor.
    could cause buffer-overflows.
  * bug fix: source location information is stored correctly 
    command was used.
    on x86-64. (reported by Gregory Vanuxem)
    word). (reported by Vjacheslav Fyodorov)
    by Pierre Mai)

changes in sbcl-1.0.8 relative to sbcl-1.0.7:
    atomic compare-and-swap operations on threaded platforms.
  * enhancement: experimental function SB-EXT:RESTRICT-COMPILER-POLICY
    allows assigning a global minimum value to optimization qualities
    (overriding proclamations and declarations).
    and x86-64.
    combinations of keyword arguments when second argument is constant
  * bug fix: using obsoleted structure instances with TYPEP and
    generic functions now signals a sensible error.
    (reported by Kristoffer Kvello)
  * bug fix: backtrace construction is now more careful when making
    objects that can be seen by the GC.
    thread safe.
    as the property-list of a symbol.
    situations requested, are once again file-compileable.  (reported
    by Sascha Wilde)

changes in sbcl-1.0.7 relative to sbcl-1.0.6:
  * MOP improvement: support for user-defined subclasses of
    SB-MOP:SPECIALIZER has been enhanced.  The experimental interface
    the expansion of DEFMETHOD, is responsible for generating a form
    which creates a list of specializers when evaluated.  Additional
    debugging and introspective support.
  * minor incompatible change: the (unsupported) spinlock interface
    has the owning thread as its value.
    for details.
    "a constant string".
  * enhancement: SB-INTROSPECT:FUNCTION-ARGLIST shows nicer argument lists
    for generic functions. (Thanks to Tobias C. Rittweiler)
    (depending on the bignum size.)
    on Linux.
    interrupt safe.
  * bug fix: generic function dispatch function updating is now thread
  * bug fix: interrupt safety of applicable method computation has been

changes in sbcl-1.0.6 relative to sbcl-1.0.5:
    as a contrib module.
    significantly faster.
    has an element type at least 8 bits wide.
  * enhancement: a new, experimental synchronous timeout facility is
    provided. Refer to SB-SYS:WITH-DEADLINE for details.
  * enhancement: when a symbol name conflict error arises, the
    conflicting symbols are always printed with a package prefix.
    (thanks to Kevin Reid)
    builds on the PPC.)
  * bug fixes: the treatment of non-standard subclasses of
    SB-MOP:SPECIALIZER is more correct.
  * incompatible change: PURIFY no longer copies the data from the 
    dynamic space into the static and read-only spaces on platforms
    that use the generational garbage collector
    interrupt safe.
  * bug fix: GC race condition occasionally resulting in crashes with
    declared ignored.
  * bug fix: an asynchronous interrupt could previously leave the
    system running with GC inhibited.
    rather than silently (or verbosely) returning NIL.
    (reported by Peter Graves)

changes in sbcl-1.0.5 relative to sbcl-1.0.4:
    information anyway.
  * minor incompatible change: changed experimental JOIN-THREAD interface
  * documentation: the manual now lists reader and writer methods
  * documentation: unwinding from asyncronous events has been
    documented as unsafe.
    in multithreaded application code.
    platforms. (thanks to James Anderson for the optimization hint)
    more cases.
    variants no longer cons.
    their NOT- variants no longer cons.
  * optimization: EQUAL hash tables no longer use SXHASH for objects
    EQUAL is the same as EQL.
    are significantly faster.
  * optimization: new STRING-OUTPUT-STREAM implementation is much
    faster for large outputs and conses 30% less on average.
  * enhancement: XREF information is now collected for references made
    to global variables using SYMBOL-VALUE and a constant argument.
  * enhancement: SIGINT now causes a specific condition
    ANSI requires it to return NIL.
  * bug fix: bad type declaration in the CLOS implementation has
    been fixed. (reported by James Anderson)
    (thanks to Lutz Euler)
    required by the CLHS. (reported by Samium Gromoff)
    (reported by Marco Monteiro)
    (thanks to Marco Monteiro and Kevin Reid)
    line in a file is unlimited.
  * bug fix: some GC deadlocks caused by asynchronous interrupts have
    been fixed by inhibiting interrupts for when GC is disabled.
    GETHASH), CLRHASH and REMHASH have been fixed.
    specifier no longer causes infinite recursion.
    bogus warning in DEFMETHOD bodies. (reported by Kevin Reid)
    is passed to macros that are expanded during byte compilation.
    (reported by Samium Gromoff)
    have excessive amounts of collisions. (reported by Faré Rideau)
    and bit vectors. (bug introduced in 0.9.16)
    for the debugger tests) but should still be considered
    experimental until this is fixed.
    duplicate keys. (thanks to Kevin Reid)
    handlers for dealing with illegal instructions (for trapping and
    error handling) and memory protection violations (for GC).

changes in sbcl-1.0.4 relative to sbcl-1.0.3:
    and getnameinfo sockets functions are used instead of gethostbyaddr
    and gethostbyname, on platforms where the newer functions are available.
    as a command line argument. (thanks to Kevin Reid)
    variables no longer signals bogus package lock violations. (reported
    by Eric Marsden)
    (reported by Andras Simon)
    bugs remain on x86-64.)
    funcallable instances.
    compiler policy settings of the wrong lexical environment (in 1.0.2
    and 1.0.3).
    by the spec (thanks to Eric Marsden)
    non-base strings as arguments
    reader errors
    backtraces (reported by Edi Weitz, regression in 1.0.2)

changes in sbcl-1.0.3 relative to sbcl-1.0.2:
    produce more efficient code on the x86 if the compiler can determine
    has an element type at least 8 bits wide.
    in toplevel forms as in the normal compiler
    to Magnus Henoch)
    (thanks to Jon Buller)
  * improvement: faster compilation times for complex functions
    M Kreuter)

changes in sbcl-1.0.2 relative to sbcl-1.0.1:
  * improvement: experimental support for mach exception handling on
    to use.
  * improvement: support for GBK external format.
    (thanks to Chun Tian (binghe))
  * improvement: the debugger now displays variables that have been closed
    over, in code compiled with (DEBUG 2) or higher
  * improvement: support for executable cores on NetBSD (thanks to 
    Richard Kreuter)
  * new feature: added a RESTART-FRAME debugger command
    (thanks to Eric Marsden)
    (thanks to Richard Kreuter)
  * optimization: the function call overhead in code compiled with 
    a high DEBUG optimization setting is significantly 
    (thanks to Tony Martinez)
    evaluated once (reported by Kevin Reid)
    works again (thanks to Kilian Sprotte)
    (thanks to Stephen Wilson)
    stack frames from alien callbacks.
    65k pages (thanks to David Woodhouse)

changes in sbcl-1.0.1 relative to sbcl-1.0:
  * new feature: the compiler stores cross-referencing information
    sb-introspect contrib.
    these classes interoperate with standard Common Lisp functions if
    a number of methods are defined.  (This feature is experimental
    and the interface subject to change based on feedback from SBCL
    users and the general community)
    (thanks to Yaroslav Kavenchuk)
    defined using DEFMETHOD was called from a mop-generated method using
    CALL-NEXT-METHOD (reported by Pascal Costanza)
  * bug fix: recursion is now permitted in accessors through
    SLOT-UNBOUND.  (reported by Pascal Costanza)
    signal a PROGRAM-ERROR, not a BUG.
    to Marco Monteiro)
    for better automatic indentation support. (thanks to Matt Pillsbury)
    proportional to the amount of methods in the generic function
    (reported by Todd Sabin and Jeremy Brown)        
  * optimization: the FIND and POSITION family of sequence functions
    are significantly faster on arrays whose element types have been
  * improvements to the Windows port:
    ** Intermittent heap corruption problems have been fixed. (thanks
       to Alastair Bridgewater)
    ** TRACE :ENCAPSULATE NIL (and function end breakpoints)
       work on Windows.
    ** Lisp is able to unwind foreign exception frames from alien
       callbacks. (thanks to Alastair Bridgewater)

changes in sbcl-1.0 relative to sbcl-0.9.18:
  * improvement: experimental support for threading on FreeBSD/x86.
    (thanks to NIIMI Satoshi)
    to set the size of the dynamic space reserved on startup.
  * improvement: floating point modes in effect are now saved in
    core, and restored on startup.
    compiled with (SAFETY 3)
    NIIMI Satoshi)
    (thanks to Zach Beane)
    on Linux/x86
    (contributed by NIIMI Satoshi)
    Joshua Ross)
  * bug fix: file compiler no longer confuses validated and already
    dumped structurres. (reported by Kaersten Poeck)
    Lars Brinkhoff)
  * bug fix: disassemly of funcallable instances works.
  * bug fix: single stepping on PPC.
    manifesting as nonsensical errors like "STRING is a bad type specifier 
    (reported by Josip Gracin)
    incompatible element types (thanks to Mario Mommer)
    (bug reported by Attila Lendvai and fixed by Juho Snellman)
    and don't cause extra consing
    whose elements types have been declared.
  * Improvements to SB-SPROF:
    ** Support for allocation profiling
    ** Reduced profiling overhead, especially for long profiling runs
  * Improvements to the Windows port:
    ** floating point exceptions are now reported correctly.
    ** stack exhaustion detection works partially.
    ** more accurate GET-INTERNAL-REAL-TIME.
    ** PROBE-FILE now simplifies pathnames correctly.
    ** DIRECTORY now works correctly with :WILD-INFERIORS.
       1st 1970 (although time timezone data will be unreliable).

    Max-Gerd Retzlaff)
  * bug fix: two potential GC deadlocks affecting threaded builds.
    returns T (reported by Anton Kazennikov)
    with non-variable places
  * bug fix: remove a race condition in the setting of
    funcallable-instance functions, this should make threaded CLOS
    code more stable against memory faults.
    asynchronous unwind (reported by Hannu Koivisto)
  * improvement: the debugger will now also display local variables that
    of 2 or higher.

    SB-ALIEN:C-STRING no longer implies an ASCII
    conversion. Additionally return values of type SB-ALIEN:C-STRING
  * incompatible change: SB-EXT package no longer contains the
  * incompatible change: the single-stepper is no longer available 
    on Alpha, Mips and Sparc platforms.
  * minor incompatible change: the direct superclasses of
    not (STANDARD-OBJECT FUNCTION).  This makes the
    class-precedence-lists of GENERIC-FUNCTION and
    STANDARD-GENERIC-FUNCTION comply with the requirement of ANSI
  * minor incompatible change: the default stream external format on
    to use the interpreter, set the value of the variable 
    to the single-stepper REPL. 
    for a type now works.
    (reported by Marco Monteiro)
    systems with Unix98 pty semantics.
    and will have more accurate type-inferencing than before
    whose bindings are modified
    ** replace dummy implementations of CL:MACHINE-INSTANCE and 
       CL:SOFTWARE-VERSION with proper version

changes in sbcl-0.9.16 relative to sbcl-0.9.15:
  * feature: implemented the READER-METHOD-CLASS and
    WRITER-METHOD-CLASS portion of the Class Initialization Protocol
    as specified by AMOP.
    no longer exists.
  * optimization: faster LOGCOUNT implementation on x86 and x86-64
    (thanks to Lutz Euler)
  * optimization: hashing of general arrays and vectors has been
    improved. (reported by Any Fingerhut)
    profiled functions. (thanks to Troels Henriksen)
  * enhancement: compiler-macro expansion applies now to FUNCALL forms
  * enhancement: step-instrumentation no longer wraps known
    single-value functions with multiple-value context, allowing
    better type inference.
    Bruno Haible and Pascal Costanza)
    (reported by Bruno Haible)
    initialization of methods can now be used to override
    internally-produced optimized functions.  (reported by Bruno
    system-provided lambda expression no longer cause warnings about
    unbound #:|pv-table| symbols.
  * bug fix: improved the handling of type declarations and the
    detection of violations for keyword arguments with non-constant
  * bug fix: potentially erronous calls to PATHNAME and
    MERGE-PATHNAMES were being flushed in some cases.
    (reported by Richard Kreuter)
  * bug fix: compiled calls to TYPEP were mishandling obsolete
    instances.  (reported by James Bielman and Attila Lendvai)
    trigger an AVER, but signal an understandable error instead.
    (reported by Antonio Martinez)
    (reported by James Y Knight).
    argument for shadowing by local functions.
  * bug fix: inline expansions of known functions were subject to
    step-instrumentation in high debug policies, leading to problems
    with type-inference.
  * bug fix: compiler failed to differentiate between different CONS
    types in some cases.
    for win32. (thanks to Mike Thomas and Yaroslav Kavenchuk)
    element type.
  * thread-safety improvements:
       interrupted and subsequently continued with SIGCONT.

changes in sbcl-0.9.15 relative to sbcl-0.9.14:
  * minor incompatible change: pretty printing of objects of type
    sensitive to whether the symbol satisfies FBOUNDP.  (thanks to
    Marcus Pearce)
  * minor incompatible change: SB-MOP:FINALIZE-INHERITANCE is now
    first instance of the class is created.  Previously,
    class became finalizeable.
  * fixed bug: FILE-POSITION sometimes returned inconsistent results
    with :ALLOCATION :CLASS inherited from superclasses of the
    original class.
    AMOP.  (reported by Leonid Slobodov on comp.lang.lisp)
    executed when SBCL_HOME isn't set. (reported by James Knight)
  * fixed bug: toplevel LOCALLY forms with declarations could 
    occasionally get miscompiled. (reported by Yaroslav Kavenchuk)
  * fixed bug: printing from several different threads using different
    some internal special variables of the printer not being bound
    thread-locally (reported by Max Mikhanosha)
  * fixed bug: SPECIALIZER metaobjects (including anonymous classes
    (reported by Pascal Costanza)
  * fixed bug: FINALIZE-INHERITANCE is called from
    REINITIALIZE-INSTANCE on classes when the class has previously
    been finalized, as required by AMOP.
  * minor code generation optimizations:
    ** better register allocation in CLOS dispatching functions
  * fixed some bugs revealed by Paul Dietz' test suite:
       return its argument.

changes in sbcl-0.9.14 relative to sbcl-0.9.13:
    on OS X/x86.
    of heap.
    default method for SLOT-UNBOUND.
  * minor incompatible change: prevent the user from specializing the
    additionally it just doesn't work in SBCL as currently
    implemented, thanks to optimizations (that are always valid for
    default, and DISABLE-DEBUGGER and ENABLE-DEBUGGER also affect
    the low-level debugger.
    from SYNONYM-STREAM and TWO-WAY-STREAM provided they can be decomposed
    MACROLET forms.
    (reported by Pascal Costanza)
    failed with a type error.  (reported by Pascal Bourguignon)
  * bug fix: merging pathnames against defaults with :DIRECTORY
    (reported by James Y Knight)
    error (patch by Robert J. Macomber)
    workaround for bug 403.) 
  * bug fix: floating point exception handling now works on FreeBSD
    (thanks to NIIMI Satoshi)
  * fixed some bugs revealed by Paul Dietz' test suite:
       compilation stages.
  * improvements to the Win32/x86 port:

changes in sbcl-0.9.13 relative to sbcl-0.9.12:
  * improvement: compilation of most CLOS applications is significantly
  * optimization: added a limited bytecode compiler for simple toplevel
    forms, speeding up compilation and FASL loading
  * bug fix: the statistical profiler now properly distinguishes anonymous

changes in sbcl-0.9.12 relative to sbcl-0.9.11:
    versions) SB-MOP:FINALIZE-INHERITANCE would recursively descend
    into subclasses of the finalized class.  Now user calls to
    system return before any subclasses are finalized.
  * minor incompatible change: The reader no longer ignores errors
    inhibit loading the corresponding init files
    error is signalled instead (thanks to François-René Rideau)
  * minor incompatible change: Error signalling behaviour of lexical
    operations violating package locks has changed slightly. Refer to
    documentation on package locks for details.
    (reported by Mika Pihlajamäki)
    immediately available from the stream
    were reversed. (reported by Levente Mészáros)
    when given a vector displaced to an adjustable array.  (reported
    by Utz-Uwe Haus)
  * bug fix: derivation of float boundaries from numbers outside the
    appropriate float range (reported by John Wiseman)
  * bug fix: precomputing cache entries for generic functions with
    some subclasses of specializers as yet invalid does not attempt to
  * improvements to DOCUMENTATION for TYPE and STRUCTURE doc-types:
    allow condition class objects as arguments to DOCUMENTATION and
    (SETF DOCUMENTATION); only find and set documentation for
  * improvements to the Win32/x86 port:
       locations now know about the user's "Documents and Settings"
       directory (thanks to Yaroslav Kavenchuk)
    ** sockets support (thanks to Timothy Ritchey)
    ** better backtrace support (thanks to Alastair Bridgewater)
    ** sb-grovel supported
    ** asdf-install and sb-posix work somewhat
  * improvements to the Solaris/x86 port:
    ** works on Solaris 11/Solaris Express
    ** floating-point exception handling support
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** REMOVE-METHOD returns its generic function argument even when
       the method is not one of the generic functions' methods.
    ** objects declared as MEMBER types can be admissible arguments to 
       structure accessors.
    ** compiler failure when compiling functions with hairy constant
       defaults for optional parameters.
       function, which is already optimized.

changes in sbcl-0.9.11 relative to sbcl-0.9.10:
    MacOS X 10.4.5 on Intel.
    (through CHAR-NAME and NAME-CHAR).
  * new feature: the filesystem location of SBCL's core file is
  * minor incompatible change: the contrib modules SB-POSIX and
    this change is to make it easier to distribute
    location-independent binaries.
    slots named by external symbols of public packages.  (reported by
    Pascal Costanza)
  * optimization: calling functions via constant symbols -- as in 
    case of dealing with an unknown number of values has been altered
    to be friendlier to the prediction heuristics implemented,
    particularly with reference to CALL and RET pairing.  (thanks to
    Alastair Bridgewater)
    (thanks to Alastair Bridgewater)
  * enhancement: CONSTANTP is now able to determine constantness of
    more complex forms, including calls to constant-foldable standardized
    functions and some special forms beyond QUOTE.
  * fixed bug: occasional GC crashes on Solaris/x86
    (thanks to James Knight)
    by the standard (thanks to Stephen Compall)

changes in sbcl-0.9.10 relative to sbcl-0.9.9:
    be used for bundling the runtime and the core file into one 
    executable binary. This feature is not currently supported on all SBCL
    platforms.  (thanks to James Bielman and NIIMI Satoshi)
  * new feature: a generational or ephemeral garbage collector is now
    (thanks to Cyrus Harmon, after Raymond Toy)
  * minor incompatible change: the method by which SBCL finds its
    contributed modules has changed; it no longer relies on symbolic
    links from an $SBCL_HOME/systems directory, but searches directly
    in the subdirectories of $SBCL_HOME.
    markedly larger, even using the older Cheney garbage collector.
    certain complicated string types.  (reported by Gary King)
    character codes.  (thanks to Yaroslav Kavenchuk and Ivan Boldyrev)
  * fixed bug: DOCUMENTATION on structures no longer signals an 
    Glenn Ehrlich)
    applicable non-standard primary or :AROUND method on
  * fixed bug: metacircle resolution in cases where methods have slots
    sometimes computed its return address wrongly (depending on the
    manifest itself in a segmentation violation while building PCL.
    (reported by Kevin Rosenberg, Eric Marsden, Lars Brinkhoff and
    many others over the years)
    (thanks to Peter van Eynde)

changes in sbcl-0.9.9 relative to sbcl-0.9.8:
  * new platform: experimental support for the Windows operating
    system has been added.  (thanks to Alastair Bridgewater)
  * fixed several bugs in and robustified the PPC FFI (including
    callbacks).  (thanks to Cyrus Harmon and Heiner Schwarte)
  * bug fix: closed a loophole in metacircularity detection and
    grounding in the PCL implementation of CLOS.
    (reported by tomppa on #lisp)
    (reported by Andrej Grozin and Hendrik Maryns)
  * optimization: major improvements to GC efficiency on GENCGC platforms
  * optimization: faster implementation of EQUAL
  * optimization: emit more efficient opcodes for some common 

changes in sbcl-0.9.8 relative to sbcl-0.9.7:
    by ANSI as a generic function, and for consistency (SETF
    GENERIC-FUNCTION-NAME) is treated likewise.
    value is changed after it is referenced but before it is used
    expected.  (reported by Tim Daly Jr)
  * fixed bug #391: complicated :TYPE intersections in slot
    definitions no longer cause an error in PCL internals.
    returning the number of octets which would be written to the
    file-stream.  (thanks to Robert J. Macomber)
    arguments to the internal stream functions.  (thanks to David
    platform.  (thanks to Daisuke Homma)
  * bug fix: more accurate ROOM results on GENCGC platforms
  * optimization: improved type inference for arithmetic-for
    index variables in LOOP
  * optimization: faster floating-point SQRT on x86-64
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** DOCUMENTATION returns NIL instead of "" for method combinations
       that don't have a docstring
changes in sbcl-0.9.7 relative to sbcl-0.9.6:
    however, the SBCL implementation of these functions now calls
    argument, as do eslotd initialization methods.  (from Pascal
    Costanza's "Closer" project)
  * bug fix: REINITIALIZE-INSTANCE on generic functions calls
    COMPUTE-DISCRIMINATING-FUNCTION (almost) unconditionally, as
    specified by AMOP.
    STANDARD-GENERIC-FUNCTION without causing stack overflow.
    (reported by Bruno Haible, Pascal Costanza and others)
  * bug fix: the dependent update protocol now works for generic
    functions.  (thanks to Gerd Moellmann; reported by Bruno Haible
    and Pascal Costanza)
  * bug fix: condition-class instances corresponding to
    DEFINE-CONDITION forms are now created eagerly.  (reported by
    Kalle Olavi Niemitalo on comp.lang.lisp)
  * bug fix: floating point printing is more accurate in some
    circumstances.  (thanks to Simon Alexander)
    (thanks to Cyrus Harmon)
  * enhancement: the x86-64 disassembler is much better at
    disassembling SSE instructions.  (thanks to Lutz Euler)
    (thanks to Vincent Arkesteijn)
  * optimization: improved performance of EUC-JP external format.
    (thanks to NIIMI Satoshi)
  * optimization: performance improvements to IO on file streams of
  * optimization: much faster memory allocation on x86-64
  * optimization: faster garbage collections (latency and throughput)
    on gencgc
    (thanks to Lutz Euler)
    floating point index variable or a negative step.

changes in sbcl-0.9.6 relative to sbcl-0.9.5:
    Linux kernels with apparently buggy implementations of personality().
    (thanks to Svein Ove Aas)
  * bug fix: Unicode symbols are correctly printed in LDB backtraces
    (thanks to David Lichteblau)
  * bug fix: local bindings shadow global symbol macros for
    macroexpansion.  (reported by Matthew D Swank on comp.lang.lisp)
  * optimization: non-open coded uses of numeric comparison operators
    on platforms supporting dynamic-extent allocation.
  * enhancement: saving cores with foreign code loaded is now supported
    on MIPS/Linux in addition to the previously supported platforms.
    (thanks to Alexander Kjeldaas)
  * new feature: ignoring the return values of destructive functions
    like NREVERSE signals a compile-time style-warning.
    (thanks to Kevin Reid)
  * new feature: the alignment of alien structure fields can be
    explicitly specified. (thanks to Cyrus Harmon)
    and dump core on SIGQUIT
  * threads
    ** incompatible change: threads do not inherit values of specials
       from their parents (see manual)
       suspended for gc
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** SUBTYPEP is slightly more accurate on heinously complicated
       CONS types where some of the members have uncertain (in the
       NIL, NIL sense) type relationships to each other.
       no longer purified unless :PURIFY T is explicitly specified.
    ** Non-purified cores are significantly smaller than before

changes in sbcl-0.9.5 relative to sbcl-0.9.4:
  * new feature: timers based on Zach Beane's excellent timer package
  * incompatible change: a threaded SBCL will no longer revert to
    more sigsegvs when receiving a signal to soon
    workaround will only be in effect on systems with the proc filesystem
    Faré Rideau)
    confused when confronded with alternate-metaclass
    funcallable-instances.  (reported by Cyrus Harmon)
    consistent, even on internal alternate-metaclass objects.
  * bug fix: flush closure information collected by physical
    environment analysis prepass before the main pass. (bug reported
    by Vasile Rotaru)
    aka froog on #lisp)
  * fixed some incompatibilities between SBCL's MOP and the MOP
    specified by AMOP:
    ** the METAOBJECT class is now implemented;
    ** FUNCALLABLE-STANDARD-OBJECT is now a subclass of
       STANDARD-OBJECT, as required;
       now compatible (as required by VALIDATE-SUPERCLASS); there
       remains a consistency requirement over the presence or absence
       of the FUNCTION class in the superclass list of finalized
       classes; see the manual for more details;
    ** the :AROUND method for COMPUTE-SLOTS on
       FUNCALLABLE-STANDARD-CLASS now honours the primary method's
       requested slot ordering.
  * threads
       child thread
       the same as that symbol not having been bound (thanks to
       Hannu Koivisto)
       Hannu Koivisto)
       interrupt_handle_now(..)' anymore
  * fixed some bugs revealed by Paul Dietz' test suite:
       the :method-class keyword argument.

changes in sbcl-0.9.4 relative to sbcl-0.9.3:
    mostly supported, though some rough edges in the environment
    remain.  (thanks to Daisuke Homma)
    space for its heap.  (thanks to Thiemo Seufer)
  * optimization: SBCL on MIPS platforms now supports dynamic-extent
    closures.  (thanks to Thiemo Seufer)
  * minor incompatible change: eof selects abort in the debugger.
    is disabled.
  * minor incompatible change: SB-KERNEL:INSTANCE-LAMBDA is
    is switched on or off
  * bug fix: discriminating functions for generic function classes
    make invalid assumptions about method precedence order.  (reported
    by Bruno Haible)
    platforms.  (thanks to Thiemo Seufer)
    (thanks to Kevin Reid)
    package locks.  (reported by Zach Beane)
    for funcallable-instance functions, and is no different from
    regular LAMBDA.
    characters in the current readtable.  (reported by Nicholas Neuss)
    accurate acknowledgment of its certainty.
  * optimizations: REMOVE-DUPLICATES now runs in linear time on
    lists in some cases.  This partially fixes bug 384.
  * flush all standard streams before prompting in the REPL and the
  * bug fix: signal handling and triggering gc do not conflict
    directly anymore, in particular a high frequency sb-sprof does
    not prevent gc from running
    approximation for timezone and DST information between the
    universal time epoch and the smallest negative 32-bit time_t.
    the correct answer for non-constant rotate amounts when performing
    an inline 32-bit rotation.
  * threads
       there is only one thread in the session
       written to in another
    ** bug fix: lockup when compiled with gcc4
       queue is full
    ** bug fix: finished threads are gc'ed properly
  * fixed some bugs revealed by Paul Dietz' test suite:
       has arguments with a different set of applicable methods from
       the orignal arguments.
       name a compiled function.
       a float that couldn't represent that bignum during type
       derivation were fixed.
    ** SUBTYPEP can now handle types involving the negation of a
       list-form FUNCTION type.
    ** SUBTYPEP also now handles certain COMPLEX type specifiers such

changes in sbcl-0.9.3 relative to sbcl-0.9.2:
  * New feature: Experimental support for bivalent streams: streams
    (unsigned-byte 8) I/O
    to Zach Beane)
    of a select system call
  * compiler better recognizes complex arrays (reported by Eduardo
  * various error reporting improvements.
    (Thanks to Thiemo Seufer)
  * bug fix: nested reader invokations work correctly
    code and foreign data with the same name.
  * threads
    ** added x86-64 support
    ** incompatible change: the threading api now works with thread
       objects instead of thread ids
       starting up or going down
    ** fixed numerous gc deadlocks introduced in the pthread merge
       an inappropriate moment
  * fixed some bugs revealed by Paul Dietz' test suite:
       EXPECTED-TYPE slots filled.
       values form.
    ** MAKE-CONDITION accepts classes as type-designators.
    ** COMPILE may never return NIL.
       range before calling Unix time functions

changes in sbcl-0.9.2 relative to sbcl-0.9.1:
  * numerous signal handling fixes to increase stability
  * minor incompatible change: we now correctly canonize default
    as per the MOP, rather than the historical (INITARG INITFUNCTION
    INITFORM).  (reported by Bruno Haible)
    for more information.
    pathname is a directory pathname.
    Cyrus Harmon)
    Bruno Haible for CMUCL, patch for CMUCL by Gerd Moellmann)
    (reported by Bruno Haible; patch from Gerd Moellmann)
    Sascha Wilde)
    x86-64 (thanks to James Knight)
    COERCE and BIT-* functions when they return freshly constructed
    objects. (reported by Nikodemus Siivola and Paul Dietz)
  * optimization: improved the MIPS versions of generic (in the
    generic sense) arithmetic routines.  (thanks to Thiemo Seufer)
    the PowerPC platform.
  * optimization: structure instances with raw slots now use less
    memory, and probably show better memory locality.  (thanks to
    David Lichteblau)
  * optimization: DYNAMIC-EXTENT declarations for lists and closures
    Alpha-32, PPC and SPARC platforms.
    (thanks to Tony Martinez)
  * threads
    ** gcing a dead thread can no longer lead to lockups
    ** threads block signals until they are set up properly
    ** errno is no longer shared by threads
    ** interrupt-thread restores the eflags register on x86
    ** fixed some lockups due to gc/thread interaction
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** invalid dotted lists no longer raise a read error when 
       *READ-SUPPRESS* is T
       as the name of a type, or vice versa
    ** circularity detection works properly with PPRINT-LOGICAL-BLOCK
    ** don't signal errors when pretty-printing malformed LABELS, 
       FLET or MACROLET forms
       DOLIST return-form
       and OUTPUT-FILE
       always evaluated

changes in sbcl-0.9.1 relative to sbcl-0.9.0:
    target with a 64-bit host compiler.
    opened with :IF-EXISTS :OVERWRITE.
    combination method is not signalled until the faulty method is called.
    intervals. (reported by Alan Shields)
    or more runtime options were provided to the sbcl binary.
  * contrib improvement: implement SB-POSIX:MKSTEMP (Yannick Gingras)
    x86-64.  (Thanks to James Knight)
    64-bit long long arguments and return values to alien functions
    are now supported.
  * fixed some bugs revealed by Paul Dietz' test suite:
       a file has the stream as its datum.
       :INVALID-OBJECT as the datum
       a correct expected type
       for structures defined with a :TYPE. Documentation strings for
       typed structures are no longer immediately discarded
       broadcast streams and synonym streams. FILE-LENGTH now also works
       on broadcast streams.

changes in sbcl-0.9.0 relative to sbcl-0.8.21:
  * incompatible change: the --noprogrammer option, deprecated since
    version 0.7.5, has been removed.  Please use the equivalent
    --disable-debugger option instead.
    interrupts enabled.
    inoperational for a while now) has been completely removed.
    significantly reducing the amount of clutter in typical backtraces.
  * documentation on weak pointers, finalization, and after GC hooks
    has been added to the manual.
    as other specialized array types, is much faster.  SUBSEQ and
    COPY-SEQ on such arrays have also been sped up.
    all spaces that need to be at a fixed address.
  * fixed inference of the upper bound of an iteration variable.
    (reported by Rajat Datta).
  * fixed bug 211e: calling local functions with duplicated constant
    keyword argument no longer causes a bogus style warning about an
    unused variable.
    ftype declaration to be disregarded. (reported by Dave Roberts)
    variables in the runtime on ppc/darwin.
  * fixed bug 376: CONJUGATE type deriver.
    (reported by Baughn on #lisp)
    fixed.  (thanks to Bruno Haible)
  * improvements to the MIPS runtime code for increased stability.
    (thanks to Thiemo Seufer)
  * increased the maximimum compact environment size to allow
  * partial workaround for bug 135: don't name the function we're
    entry per call to EVAL.  (reported by Kevin Reid)
    on x86-64
    on Alpha-32.
    previous accessor / function clash now works (but see BUGS entry
    to Wendall Marvel)
  * on x86 compiler supports stack allocation of results of simple
  * fixed some bugs related to Unicode integration:
    ** the restarts for recovering from input and output encoding
       errors only appear when there is in fact such an error to
  * fixed some bugs revealed by Paul Dietz' test suite:
       assertions into derived types caused unexpected code
    ** SCALE-FLOAT type deriver is less wrong.
       types for complex arguments better.
       complex types.
    ** EQUAL compiler transform understands specialness of objects
       of type BIT-VECTOR.
    ** debugger internals could sometimes create invalid lispobjs, 
       resulting in GC crashes.

  * incompatible change: thread support for non-NPTL systems has
    been removed - locking is buggy and unreliable.  A threaded 
    SBCL build will now warn at startup and refuse to create
    new threads, unless futex support is detected in the kernel
    TOP and TOPLEVEL are now available as debugger commands for 
    returning to the top level.
  * incompatible change: forms evaluated in the REPL now use the
    global optimization policy.
  * incompatible change: user- and system-initialization files are
    global optimization policy, startup package, readtable, etc, 
    can be set by them.
  * The .fasl file format number has been incremented because of 
    various incompatible changes.
  * internal entry point details and argument counts no longer appear
    in backtraces unless explicitly requested by setting
    level local call to FOO".
    now have more legible printed representation
    are now more amenable to inspection by INSPECT.
    explicitly requested.
  * fixed bug: receiving the signal which results from attempting to
    to debugger confusion or wild instability.  (reported by Cheuksan
  * fixed bug: COUNT and EQUAL no longer issue compiler efficiency
    (reported by Lutz Euler)
    compiled code. (reported by Paul Dietz)
    specialized parameter to a method to something that is not TYPEP
    the specializer is now possible.
    face of package deletion.
    pathname. (reported by David Tolpin on c.l.l)
    STRING-STREAM and FILE-STREAM, respectively.
  * contrib improvement: SB-INTROSPECT handles more of SLIME's needs
    (thanks to Luke Gorrie)
  * optimization: added a immediate representation for single-floats 
    on x86-64
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** attempting to create a package with a colliding nickname causes
       correctable errors to be signalled.

  * fixed loading of multiply forward-referenced layouts. 
    (thanks to Cheuksan Wang)
    more accurate.  This also fixes a bug reported by Adam Warner
    related to the ~@F format directive.
    by Svein Ove Aas)
  * optimization: sequence traversal functions use their freedom to
    coerce function designators to functions.
  * optimization: code with many calls to CLOS methods specialized on
    CLOS classes has had redundant type checks removed.
  * optimization: added declarations to speed up operations that access
    the internal character database (for example STRING-UPCASE)
  * optimization: comparison operations between floats and sufficiently small
    fixnums no longer create extra rationals
  * fixed some bugs related to Unicode integration:
    ** portions of multibyte characters at the end of buffers for
       character-based file input are correctly transferred to the
       start of the buffer at the next read.
       passing it through to OPEN.
    ** LOAD on source files likewise passes any EXTERNAL-FORMAT
       argument given to internal calls to OPEN.
       boundary.  (thanks to Teemu Kalvas)
  * fixed some bugs in the x86-64 port:
       the ABI. (thanks to Cheuksan Wang)
       for enums. (thanks to Vincent Arkesteijn)
    ** Multiple small optimizations and bugfixes for floating point
  * fixed some bugs revealed by Paul Dietz' test suite:
       secondary constituent character trait.
       normal termination.
       works more reliably.
       with one-dimensional arrays with fill pointers.
       RATIO imagpart.
    ** compiler failure during type inference for the code of form

changes in sbcl-0.8.19 relative to sbcl-0.8.18:
    and reloading shared object files.
  * enhancement: saving cores with foreign code loaded is now
    supported on ppc/Darwin in addition to the previously supported
  * enhancement: the statistical profiler now walks deeper into the 
    call stack for more meaningful call-graphs and accrued time
    foreign functions.
  * enhancement: it is now possible to trace most individual methods
    of a generic function in addition to tracing the generic function
    SHARED-INITIALIZE methods from compiled calls to MAKE-INSTANCE.
    produces an error.  (thanks to Vincent Arkesteijn)
    directories works correctly.  (thanks to Artem V. Andreev)
    by Gabe Garza)
  * bug fixed: functions with &REST arguments sometimes failed with
    Robert J. Macomber)
    *COMPILE-FILE-PATHNAME* being absolute pathnames.
  * on x86 compiler partially supports stack allocation of dynamic-extent
    when compiled with SAFETY 0.
  * fixed some bugs related to Unicode integration:
    ** encoding and decoding errors are now much more robustly
       handled; it should now be possible to recover even from invalid
       interface just enough for it to be supportable for builds where
       lisp characters are not eight bits.
  * fixed some bugs revealed by Paul Dietz' test suite:
       the correct number of arguments.
       to displaced strings.
       constituent characters by the tokenizer.

changes in sbcl-0.8.18 relative to sbcl-0.8.17:
  * new feature: reloading changed shared object files with
  * new feature: references to foreign variables and functions
    can now be compiled and loaded before the corresponding shared 
    object file is loaded, as long as the foreign definitions are
    available at runtime.
    supported.  (thanks to Dan Debertin)
    just keywords.  (thanks to Vincent Arkesteijn)
  * fixed bug #331: structure-class instances corresponding to
    DEFSTRUCT forms are now created eagerly.
    (backtraces from throws to unknown catch tags.)
    of lambda-list keywords.
    by Bruno Haible)
    of its numeric argument as a disjoint set of small integers.
    (reported by Paul Dietz)
    those objects are not available no longer causes threaded SBCL to 
    hang. (reported by Sean Ross)
    to Gabor Melis)
  * fixed some bugs related to Unicode integration:
       stream.  (reported by Stefan Scholl)
    ** ASDF-INSTALL successfully downloads .tar.gz files in all
       locales.  (reported by Ken Causey)
  * fixed some bugs revealed by Paul Dietz' test suite:
       CLtS 5.1.3.
       parameters correctly.
       consequent uses no arguments correctly.
       type specifier.

changes in sbcl-0.8.17 relative to sbcl-0.8.16:
    keyword feature, enabled by default) for building the system with
    support for the entire 21-bit character space defined by the
    Unicode consortium.
  * new feature: the system now has rudimentary external-format
    print correctly to a terminal in a UTF-8 environment.
    LET and LET* forms.
    (reported by Bruno Haible)
    required.  (reported by Bruno Haible)
  * bug fix: redefining a class with different superclasses now correctly
    removes it from the direct-subclasses of its previous superclasses.
    (reported by David Morse)
    new value now works. (reported by Bruno Haible)
  * bug fix: correct canonicalization of multiple non-standard slot
    now exists, an signals an error.
    during macroexpansion for non-iteration variables as well. (reported 
    by Bruno Haible for CMUCL)
  * bug fix: Cyclic structures and unprintable objects in compiler
    messages no longer cause errors. (reported by Bruno Haible)
    (reported by Bruno Haible for CMUCL)
    do not designate a condition.  (reported by Bruno Haible for
    name conflict situations in CLHS, and provide a restart
    permitting resolution in favour of any of the conflicting symbols.
    (reported by Bruno Haible for CMUCL)
  * bug fix: EQUAL compiler optimizations is less aggressive on
    strings which can potentially compare true despite having distinct
    specialized array element types.
  * bug fix: unit enumerations can be defined without dividing by
    zero.  (thanks to Vincent Arkesteijn)
  * FORMAT compile-time argument count checking has been enhanced.
    (report from Bruno Haible for CMUCL)
    Wragg for the simple test case)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** RENAME-PACKAGE allows all package designators as new package
    ** constraint propagation and lambda variable substitution are
       more cautious in dealing with partially deleted code.
    ** compiler sometimes lost reoptimization passes.
       remaining arguments to the continue format control without
    ** The REAL type specifier handles bounds outside the floating
       point ranges without signalling FLOATING-POINT-OVERFLOW.
    ** Functions with IR1-transformations can create intercomponent
       references to global functions.

changes in sbcl-0.8.16 relative to sbcl-0.8.15:
  * enhancement: saving cores with foreign code loaded is now
    supported platforms.
  * bug fix: on some platforms repeated installations caused multiple
    copies of HTML documentation to be installed -- should not happen
    any more. (reported by Stefan Scholl)
    original patch by Helmut Eller for CMUCL)
    (thanks to Richard Kreuter)
  * bug fix: defining classes whose accessors are methods on existing
    generic functions in other (locked) packages no longer signals
  * bug fix: special variables as DEFMETHOD parameters no longer have
    associated bogus type declarations. (reported by David Wragg and
    Bruno Haible)
    no DEFGENERIC no longer emits a full WARNING.  In addition,
    redefinition of generic functions with no DEFGENERIC to an
    incompatible lambda list now signals an error.  (thanks to Zach
    same name in an enclosing lexical environment.  (thanks to Zach
  * fixed compiler failure, caused by instrumenting code during
  * optimization: added loop analysis and improved register allocation
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** POSITION on displaced vectors with non-zero displacement
       returns the right answer.
       correct amounts.
    ** The justification version of the FORMAT ~< directive treats
       non-zero minpad parameter correctly.

changes in sbcl-0.8.15 relative to sbcl-0.8.14:
    the supported interface.
  * new feature: saving cores with foreign code loaded is now
    Timothy Moore's work for CMUCL)
    parameters to * instead of NIL if no initform is supplied.
    (reported by Johan Bockgaard)
    despite this FUNCALL forms are not currently subject to
    same from CMUCL, reported by Johan Bockgaard)
    (thanks for Teemu Kalvas)
    case instead of terminating the iteration (thanks for Julian
    Squires, Sean Champ and Raymond Toy)
  * bug fix: incorrect expansion of defgeneric that caused a style
    warning. (thanks for Zach Beane)
  * bug fix: slot accessor effective method computation works properly
    for classes with multiple non-standard applicable methods on
  * on x86 compiler supports stack allocation of results of LIST and
    CMUCL implementation by Gerd Moellmann)
  * fixed some bugs revealed by Paul Dietz' test suite:
       directive and pretty-printing directives cause an error.

changes in sbcl-0.8.14 relative to sbcl-0.8.13:
  * incompatible change: the internal functions
    instead of the old functions.
    function names now appear in backtraces.  (based on Helmut Eller's
    work for CMUCL)
  * documentation: ASDF manual is now distributed with SBCL.
    even if the system-provided entries have been removed from
  * bug fix: backtraces involving undefined functions or assembly
    routines are more informative.  (thanks to Brian Downing)
  * bug fix: mutually referent alien structures now work correctly.
    (reported by Rick Taube)
    within other definitions in the same WITH-ALIEN.
    constant zero divisors and integer dividends no longer generate
    left shifts.
  * bug fix: improve the detection and resolution of MOP metacycles
    (where effective method computation depends on the generic function
  * bug fix: pathnames with relative directory components can be
    represented relative to default pathnames.
    to approximately the same size (using Euclid's algorithm) before
    applying the more sophisticated binary GCD.  (thanks to Juho
    hardware shift.
  * fixed some bugs revealed by Paul Dietz' test suite:
       if the corresponding argument is NIL.
    ** FORMAT directives accepting a minpad parameter treat negative
       values as 0.
    ** literal commas as character parameters to FORMAT directives are
       parsed correctly.
       conditional newlines.
       as specified: it no longer includes conditional newlines).

changes in sbcl-0.8.13 relative to sbcl-0.8.12:
    compiled in unconditionally.
    unsupported operators on all platforms.  To load a shared library
    bug #79)
    reliably, because invariants expected by the SB!VM:INSTANCE-USAGE
    reporting facility aren't preserved. That reporting has been
    The symbols are also exported from SB-PCL for backwards
    an implementation-internal package.
  * fasl format changed: SBCL 0.8.13 fasls are incompatible with those
    of earlier versions
    bodies are now more legible.
    designators and can hence be used with TYPEP.
    TYPE-ERROR-DATUM.  (reported by Tony Martinez)
    Olavi Niemetalo)
  * fixed bug #334: programmatic addition of slots using specialized
    and :ALLOCATION :CLASS slots.
    float exponents.  (rereported by Peter Seibel)
    longer considered to be macro characters in standard syntax by
  * fixed bug: initialization of condition class metaobjects no longer
    Marco Baringer)
    SB-MOP:SLOT-DEFINITION-ALLOCATION of the effective slot
    description is neither :INSTANCE nor :CLASS.
    non-standard SLOT-DEFINITION-ALLOCATION values.
  * fixed bugs: various race conditions handling exiting threads.  
    CL-PPCRE's thread torture test now passes.
    system even when most of them are idle
  * .fasl file incompatibility: The fasl file version number has
    been incremented because of changes associated with package locks.

changes in sbcl-0.8.12 relative to sbcl-0.8.11:
  * minor incompatible change: the system no longer provides
    optimization hints (conditions which are TYPEP
    SB-EXT:COMPILER-NOTE) for conforming code in default compilation
    mode; these hints are still emitted when higher SPEED optimization
    is requested.
  * new contrib module: a sampling profiler (profiling by statistical
    sampling, rather than by instrumenting functions) is available as
  * the behaviour of the standard function ED is now customizeable by
    third parties through a hook variable: see ED's documentation
    string for information on the protocol.
    when the type of X is uncertain under default optimization
    method to something that is not TYPEP the specializer is now
    exhibit the required behaviour on the x86 platform.  (thanks to
    Peter van Eynde, Eric Marsden and Bruno Haible)
  * fixed bug 335: ATANH now computes the inverse hyperbolic tangent
    even for difficult arguments.  (reported by Peter Graves)
  * fixed bug 141a: the backquote printer now descends quoted
  * fixed another bug in backquote printing: no more destructive
    modification of the form's list structure.  (reported by Brian
    move between its address being taken and the call to
    interrupt_thread, fixing a crashing race condition.
    no longer exhibits ridiculously poor performance when constructing
    instances corresponding to C structs.

changes in sbcl-0.8.11 relative to sbcl-0.8.10:
    has implications for memory management of client code
    type safety (alien objects now have full types).
    used to control emission of compiler diagnostics, rather than the
    SB-EXT:INHIBIT-WARNINGS OPTIMIZE quality.  See the manual for
    documentation on this feature.  The SB-EXT:INHIBIT-WARNINGS
    quality should be considered deprecated.
  * install.sh now installs the user manual as well
    beginnings of a semantically meaningful condition hierarchy is
  * fixed bug: PARSE-NAMESTRING now accepts any valid pathaname
    designator as the defaults argument.
    for safer bounds-checking. (reported by Bruno Haible)
  * fixed bug: DEFCLASS slot definitions with identical :READER and
    file deletion.
  * fixed bug: Invalid slot specification errors now print correctly. 
    (thanks to Zach Beane)
    redefinitions now happen corrently from superclasses as
    well. (reported by Bruno Haible)
    improper lists correctly. (reported by Bruno Haible)
    (reported by Antonio Menezes Leitao)
  * fixed bug 307: The obsolete instance protocol ensures that
    subclasses are properly obsoleted.  (thanks to Nikodemus Siivola)
    to diagnose and fix failures.  (thanks to Nikodemus Siivola)
    function name. (thanks to Nikodemus Siivola)
  * fixed bug: compile-time format string checker failed on
    don't warn on legal loop code involving more than one aggregate
    boolean.  (thanks to Nikodemus Siivola)
    in keyword position to MAKE-PACKAGE was not being reported as
    file is less likely to become confused by uses of inline
    specified for slot names.  (reported by Kalle Niemitalo)
    variables have default values.  (reported by Bruno Haible)
    have CLOS classes; this appears also to have fixed reported
    instability in stack exhaustion detection.
    MUFFLE-WARNING when no associated restart is present is now
  * optimization: rearranged the expansion of various defining macros
    approximately 10%.
    to Juho Snellman)
  * fixed some bugs revealed by Paul Dietz' test suite:
       a symbol.
    ** Fixed an optimization bug related to inheritance of initforms
       from local to shared slots.
    ** CAST optimizer forgot to flush argument derived type.
       and discussions)
       for objects of type REAL.  Make it so.
    ** SXHASH is specified (infelicitously) to respect similarity,
       it so.  (thanks to Markus Ziegler)
    ** on the Alpha, the compiler succeeds in compiling functions
       returning a known number of arguments greater than 63.
    ** fixed handling of invalid NIL arguments in keyword position
       in local calls.
    ** provided a readably-printable representation for RANDOM-STATE
       print using #P"..." syntax.

changes in sbcl-0.8.10 relative to sbcl-0.8.9:
  * Support for the forthcoming 2.0 version of the NetBSD kernel
    running on x86 hardware has been added.  (thanks to Perry
    current release version; SBCL's OpenBSD support had been broken 
  * [placeholder for DX summary]
       speed or space and low safety and debug optimization policy.
  * The manual has been converted to Texinfo format and the debugger
    chapter from the cmucl manual has been added.
  * A facility has been added to extract documentation strings from
    sbcl and store them as Texinfo-formatted snippets for inclusion in
    the manual (via Texinfo's @include directive)
    the test case to Dave Roberts)
  * bug fix: multidimensional simple arrays loaded from FASLs had fill
    pointers.  (reported by Sean Ross)
    values.  (thanks to Zach Beane)
    greater than 32 handle EOF correctly.
    correctly printed in disassembly. (thanks to Lutz Euler)
  * bug fix: class slots in redefined classes preserve their old
    values.  (thanks to Bruno Haible and Nikodemus Siivola)
    succeeds.  (reported by Marco Baringer)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** READ-SEQUENCE now works on ECHO-STREAMs.
    ** RATIONALIZE works more according to its specification.  (thanks
       to Bruno Haible)

changes in sbcl-0.8.9 relative to sbcl-0.8.8:
    should matter to you only if you rebind the printer control
    variables and then find you want different bindings in the 
    debugger than in the ordinary execution of your program.)
  * The runtime build system has been tweaked to support building
    assembler and linker.  (thanks to Nikodemus Siivola)
  * Unbound, undefined, undeclared variables now trigger full
    more often programmer error than deliberate exploitation of undefined
  * optimization: the hash algorithm for strings has changed to one
    that is less vulnerable to spurious collisions.  (thanks to Juho
    needless bounds checking.  (thanks to Juho Snellman)
  * optimization: implemented multiplication as a modular
    (UNSIGNED-BYTE 32) operation on the PPC backend.
  * fixed some bugs revealed by Paul Dietz' test suite:
       element-type NIL.
       2, 8 or 16.
       their output stream on EOF from read.
    ** CONCATENATED-STREAM-STREAMS discards constituent streams which
       have been read to end-of-file.
       description of determination of which consecutive characters
       constitute a word.
       less than 10 works correctly.
       more than 10 works correctly.
       the readtable currently in effect.

changes in sbcl-0.8.8 relative to sbcl-0.8.7:
  * minor incompatible change: parsing of namestrings on a physical
    namestring are no longer interpreted as a version field.  This is
    intented to be largely invisible to the user, except that the
    should usually be replaced by 
    option to OPEN now signals an error if the file being opened
    exists; this may have an impact on existing code.
    signals received, on the PowerPC platforms (both Linux and
    the error)
    (thanks to Brian Mastenbrook)
    (thanks to Vincent Arkesteijn)
    PEEK-TYPE only after having read first character from a
    stream.  (reported by Peter Graves)
  * bug fix: the garbage collector now has much better locality
    behaviour, and in particular no longer treats all memory as being
    exhausted when many small objects point to each other in a deeply
    recursive manner.
    recognized as being TYPEP their class.
  * bug fix: the PUSHNEW documentation string has been corrected.
    (thanks to Vincent Arkesteijn)
    large number of multiple values being bound was not being
    performed correctly on the Alpha or PPC platforms
  * optimization: implemented multiplication as a modular
    (UNSIGNED-BYTE 32) operation on the x86 backend.
    (see also contrib/compiler-extras.lisp for inspiration for
    teaching the compiler about the Boyer-Moore algorithm).
    not EQL, arguments now does not depend on compiler settings.
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** in stack analysis liveness information is propagated from
       non-local entry points.
       a block.
       host is already defined.
       type error.
    ** PEEK-CHAR uses the current readtable when determining whether
       or not a character is whitespace.
       specify a name while the default-pathname specifies a version.
    ** Attempting to use standardized file system operators with a
       pathname with invalid :DIRECTORY components signals a
    ** DIRECTORY on logical pathnames is more correct.
       designator argument does not designate a stream.
       examining the synonym.
       work as specified.

changes in sbcl-0.8.7 relative to sbcl-0.8.6:
    for faster/more reliable mutex and condition variable support.
  * Incompatible change (but one you probably shouldn't have been using
    anyway): the interface and code for arbitrating between multiple
    threads in the same user session has been redesigned.
    error when called without an explicit environment argument.
    (thanks to Nikodemus Siivola)
    confused about their position.  (thanks to Adam Warner and Gerd 
  * bug fix: Pretty printing backquoted forms with unquotations in the
    argument list position of various code constructs such as LAMBDA
    now works correctly.  (reported by Paul Dietz)
  * bug fix: Pretty printing unquotations no longer loses all
    stream position information.
  * optimization: performance of string output streams is now less
    poor for multiple small sequence writes.
  * optimization: performance of CSUBTYPEP in the presence of complex
    expressions involving CONS and NOT many times has been improved.
    (reported by Paul Dietz)
    Sean Ross)
    David Licteblau)
  * fixed some bugs revealed by Paul Dietz' test suite:
       is ignored if it is too small, rather than propagating through
    ** extremely complex negations of CONS types were not being
       sufficiently canonicalized, leading to inconsistencies in
    ** VALUES tranformer lost derived type.

changes in sbcl-0.8.6 relative to sbcl-0.8.5:
  * fixed a bootstrapping bug: the build process no longer assumes
    that the various BOOLE-related constants have the same value in
    SBCL binary built from CLISP)
    which enables dynamic loading of foreign code from Lisp.  (thanks
    to Ralf Baechle for discussions on the MIPS ABI)
  * The system now records debugging information for its own source
    files in a filesystem-position-independent manner, relative to 
    the "SYS" logical host.
  * tweaked disassembly notes to be less confident about proclaiming
    some instruction as an LRA.  (thanks to Brian Downing)
    now each have their own history, command character, and other
    characteristics.  (thanks to David Lichteblau)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** compiler failure in compiling LOGAND expressions including a
       constant 0
       shift greater than 32.
    ** HANDLER-CASE failed to accept declarations in handler clauses
       in some circumstances.

changes in sbcl-0.8.5 relative to sbcl-0.8.4:
    stable yet) provides some support for smart Lisp development 
    environments like SLIME.
  * The conditions signalled for errors occurring when loading .fasl
    in a way which should help ASDF recover gracefully.
    and/or the diff to check.
    argument types for all arguments.
  * various threading fixes
    ** and some experimental patches which didn't make it into 
       the main tree for this release, but which are shipped in 
       contrib/experimental-thread.patch as a possible fix for some
  * fixed PPC build problem (source code incompatibility of different 
    where glibc maintainers put uc_mcontext today 
    arguments to a full call.
    &OPTIONAL VALUES type parameter.
  * fixed bug 141b: printing backquoted information readably and prettily
    inserts a space where necessary.
    as unknown types.  (reported by piso on #lisp)
    described in CLHS 7.6.5 and
    counter now raises a meaningful error.
  * fixed bug 213a: even fairly unreasonable CONS type specifiers are
    now understood by sequence creation functions such as MAKE-SEQUENCE
    and COERCE.
    of its result.
    salex on #lisp)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** incorrect optimization of TRUNCATE for a positive first
       argument and negative second.
    ** compiler failure while deriving type of TRUNCATE on an
       interval, containing 0.
       -1, not 0.
    ** intersection of CONS types now canonicalizes properly, fixing
       inconsistencies in SUBTYPEP.

changes in sbcl-0.8.4 relative to sbcl-0.8.3:
  * incompatible change: The --disable-debugger command line
    option now clobbers the debugger at a more fundamental
    level, by redefining #'INVOKE-DEBUGGER instead of by 
    is specified by ANSI to ignore *DEBUGGER-HOOK* and
    INVOKE-DEBUGGER regardless. Under the old system, BREAK would
    enter the debugger REPL and then suffer recursive errors
    terminates the system just as an unhandled error would.
  * bug fix: DOCUMENTATION now retrieves generic function
    documentation.  Also, DOCUMENTATION and (SETF DOCUMENTATION)
    support has been systematized, and now supports the methods
    slot documentation.  (reported by Nathan Froyd)
  * bug fix: effective methods associated with a generic function are
    no longer cached over a change of that generic function's method
    combination.  (reported by Andreas Fuchs)
    (reported by Rainer Joswig)
    arithmetic in general, is now much more reliable on the PPC
    platform now returns the right answer.
  * optimization: restored some effective method precomputation in
    precomputation is now tunable.
  * optimization: compiler-internal data structure use has been
    reviewed, and changes have been made that should improve the
    performance of the compiler by about 20%.
  * optimization: the optimization of 32-bit logical and arithmetic
    functions introduced in version 0.8.3 on the x86 has been
    implemented on the mips, ppc and sparc platforms; an
    has been added for the alpha.
    x86 LEA instruction for multiplication by constants.
    generic arithmetic in (SPEED 3) policy.
  * bug 145b fix: compiler used wrong type specifier while converting
    MEMBER-types to numeric.
    index argument now works properly on the Alpha platform.
  * bug fix: floating point exception treatment on the Alpha platform
    is improved.
    output streams.  (thanks to Nikodemus Siivola)
  * bug fix: many threading/garbage collection symptoms sorted.  
    might be pseudo-atomic.
    in the parent. 
    work again.
    CONTINUATION is now called LVAR; corresponding functions are
    to Adam Warner)
  * fixed some bugs revealed by Paul Dietz' test suite:
       small float arguments.
    ** LCM should return a non-negative integer.
       displaced string.
       longer causes an internal compiler error on the x86.
    ** compiler incorrectly derived types of DPB and DEPOSIT-FIELD
       with negative last argument.
    ** byte specifiers with zero size and position no longer cause
       an error during type derivation.
    ** bignum multiplication on the Alpha platform now returns the
       right answer.
    generates a 32-bit binary.
  * .fasl file incompatibility: The fasl file version number has
    been incremented (because of the changes to internal compiler
    data structures referred to above).

changes in sbcl-0.8.3 relative to sbcl-0.8.2:
    more accurately, on the Darwin kernel running on PowerPC hardware.
    (thanks to Brian Mastenbrook, Pierre Mai and Patrik Nordebo)
  * Compiler code deletion notes now signal a condition of type
    an associated MUFFLE-WARNING restart.
  * The compiler now performs limited argument count validation of
    constant format strings in FORMAT, and where appropriate in ERROR, 
    CERROR and WARN.  (thanks to Gerd Moellmann)
    installation of third-party Lisp code from CCLAN or other sites
    via CLiki.
    which forces another thread to execute a function supplied by the
    (reported by Martin Atzmueller, Edi Weitz)
    is the greater.  (thanks to Patrik Nordebo)
    Kalle Olavi Niemitalo)
    printable.  (reported by Eric Marsden)
    (thanks to Stig Sandoe)
    UNREAD-CHAR now correctly includes the unread character in the
    target sequence.  (thanks to Gerd Moellmann)
    resumed by shell job control with minimal disruption.
  * bug fixes in times and timezones >2038AD
    (thanks to Nikodemus Siivola)
  * new optimization: inside a named function any reference to a
    optimization quality.
  * new optimization on x86: logical functions and + now have
    optimized (UNSIGNED-BYTE 32) versions, which are automatically
    used when the result is truncated to 32 bits.
  * VALUES declaration is partially enabled.
  * fixes in SB-GROVEL (thanks to Andreas Fuchs)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** The system now obeys the constraint imposed by
       UPGRADED-ARRAY-ELEMENT-TYPE that the upgraded array element
       types form a lattice under type intersection.
    ** ASSOC now ignores NIL elements in an alist.
       and (1+ MOST-POSITIVE-FIXNUM) answers.
       function does not cause an error to be signalled immediately;
       a warning is signalled, and the error is generated only on
       calling the generic function.
    obscure ANSI requirements

changes in sbcl-0.8.2 relative to sbcl-0.8.1:
    garbage, confusing the compiler.
    or can be written with a less specific slot writer).
    circumstances could go off-by-one.
  * type declarations for array element types now obey the description
    declaration, all references to BAR will be asserted or assumed
    type FOO.  Note that no such declaration is implied in 
  * declared types of functions from the "Conditions"
    chapter. (reported by Paul Dietz)
  * bug fix: NTH an NTHCDR accept a bignum as index
    arguments. (reported by Adam Warner)
  * optimization: character compare routines now optimize comparing
    against a constant character. (reported by Gilbert Baumann)
    argument now works properly on the MIPS platform.
    declared to have a functional type, does not cause an error
    many :DEFAULT-INITARGS. (reported by Istvan Marko)
    destination, this destination should be deleted too. (reported by
    ohler on #lisp)
    test case from Patrik Nordebo)
  * improved the ability of the disassembler on the PPC platform to
    provide helpful disassembly notes.
    the class in more cases than previously.
    STRING-INPUT-STREAMs.  (thanks to Nikodemus Siivola)
    8) data.  (thanks to David Lichteblau)
    without lambda list.
    object representation. (reported by Nikodemus Siivola)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** condition slot accessors are methods.
    ** (VECTOR NIL) is a subtype of STRING.

changes in sbcl-0.8.1 relative to sbcl-0.8.0:
  * minor incompatible change: some nonsensical specialized lambda
    lists (used in DEFMETHOD) which were previously ignored now signal
    most violations of these type constraints (where previously they
    were silently accepted).
  * minor incompatible change: COMPILE-FILE now uses the freedom
    afforded (ANSI to use derived function types for
    functions defined in the same file. This also permits the system
    to warn on static type mismatches and function
  * minor incompatible change: VALUES declaration is disabled.
    restart for use in user handlers.  It is expected that the
    COMPILER-NOTE condition will eventually become a condition
    supertype to a hierarchy of note types, which will then be
    but it's an implementation detail, not a classification for the
    purpose above.)
  * Changes in type checking closed the following bugs:
    ** type checking in branches (194bc).
    increased the number of situations when SBCL cannot perform type
    keywords or constants is permissible.
    classes.  (thanks to Antonio Martinez)
  * improved ANSIness in DESCRIBE: The DESCRIBE function no longer
    operations to DESCRIBE-OBJECT methods.
    by Teemu Kalvas)
    lambda lists. (thanks to David Lichteblau)
    subclass of STANDARD-METHOD no longer causes stack exhaustion.
    (thanks to Gerd Moellmann)
  * fixed bug 246: increased compilation speed of long
    integer argument)
  * a contributed module implementing COMPILER-LET and MACROEXPAND-ALL
    has been included.
  * DEFCONSTANT now throws a condition of type
    constant to a non-EQL value; CONTINUE and ABORT restarts
    respectively change and preserve the value. 
    is now better at handling symbol macros.
    CL:LENGTH. (reported by Raymond Toy)
    implicit block does not enclose the lambda list.
    enclosed in parentheses) are not suitable as type specifiers, and
    their use properly signals an error now.
    being compiled no longer causes an unhandled error at compile
    time, but signals a compile-time warning.
  * fixed simple vector readable printing
  * bug fix: DESCRIBE takes more care over whether the class
    precedence list slot of a class is bound before accessing it.
    (reported by Markus Krummenacker)
  * bug fix: FORMATTER can successfully compile pretty-printer format
    strings which use variants of the ~* directive inside.
    in type inference. (thanks to Robert E. Brown)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** NIL is now allowed as a structure slot name.
       circumstances in LOOP for-as-arithmetic clauses.
    ** Multiple class redefinitions before slot access no longer
       causes a type error.
       association between the name and a class.
       five methods all of which return constants no longer return NIL
       after the first few invocations. (thanks to Gerd Moellmann)
       values of the arguments, even in the presence of assignment.
    ** DISASSEMBLE works with closures and funcallable instances.
       is incompatible with the generic function, even if the ERRORP
       argument is true.
       which its argument is a member.
       argument if that name is the proper name of the class;
       otherwise, it creates a new class.
       SLOT-MAKUNBOUND in the specified fashion.

changes in sbcl-0.8.0 relative to sbcl-0.8alpha.0
  * A contributed module containing a partial implementation of the
    simple-streams interface has been included.  (thanks to Rudi
  * A contributed module implementing the RFC1321 Message Digest
    Algorithm, known as MD5, has been included.
    work on conditions (as required by the ANSI specification),
    expected behaviour on conditions.  Users should note, however,
    that such behaviour is not required by the ANSI specification,
    and so use of this behaviour may render their code unportable.
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** SXHASH on condition objects no longer returns NIL.
       updated on class redefinition, and initforms inherited from
       superclasses are applied.
    ** REMOVE-METHOD returns its generic function argument even when
       no method was removed.
    ** SHARED-INITIALIZE now initializes the values of the requested
       slots, including those with :ALLOCATION :CLASS.
    ** ALLOCATE-INSTANCE now works on structure classes defined via
       DEFSTRUCT (and not just by those from DEFCLASS :METACLASS
       and CLOS instances.
       keyword, and now implements the SLOT-NAMES argument.
    ** methods with &OPTIONAL arguments no longer allow too many
       arguments to be passed in the call without error.
       option is consistent with the required arguments of the generic
       function lambda list.
    Antonio Martinez.)
    lambda lists.
  * bug fix: SETQ on globals returns the correct value.
    choosing the CONTINUE restart).
    they look for GNU "make".

changes in sbcl-0.8alpha.0 relative to sbcl-0.7.14
    for details.
  * fix for longstanding nonANSIism: The old distinction between
    CL:CLASS objects and SB-PCL:CLASS objects has been eliminated.
  * minor incompatible change: due to rearrangement for threads, the
    control stack and binding stack are now allocated at arbitrary
    addresses instead of being hardcoded per-port.  Users affected by
    this probably have to be doing advanced things with shared
    libraries, and will know who they are.
    processed with READ before any of them were processed with EVAL.
    work as the user might reasonably expect.)
    (thanks to Antonio Martinez)
  * sb-aclrepl module improvements: an integrated inspector, added
    repl features, and a bug fix to :trace command.
    a bug report by Nathan J. Froyd)
  * fixed a bug in computing method discriminating functions: It is
    now possible to define methods specialized on classes which have
    forward-referenced superclasses. (thanks to Gerd Moellmann)
  * fixed evaluation order in optional entries (reported by Gilbert
    DIRECT-SLOT-DEFINITIONS.  (thanks to Kevin Rosenberg)
    not the proper names of classes to designate class specializers.
  * Garbage collection refactoring: user-visible change is that a
    this you were probably losing anyway.
    TYPEP the latter but not the former.
  * The compiler issues a full WARNING for calls to undefined functions
    with names from the CL package.
    Brian Downing on c.l.l)
    documentation string.
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** Condition slots are now accessed more correctly in the presence
       of multiple initargs for a given slot.
       exclude restarts of the same name associated with a different
    ** DEFCLASS of forward-referenced classes with another
       forward-referenced class in the superclasses list no longer
       causes an error.
    ** Condition slots are now initialized once each, not multiple
       times. (thanks to Gerd Moellmann)
       Gerd Moellmann)
       arguments contain duplicated elements.
    ** RESTART-CASE understands local macros.
       in question is unbound.
    ** Optimized MAKE-INSTANCE functions no longer cause internal
       assertion failures in the presence of duplicate initargs.
       propagated even in the ctor optimized implementation of

changes in sbcl-0.7.14 relative to sbcl-0.7.13:
    measured both in execution speed and in distribution of results
    implementation of EQUAL for simple bit vectors is now available.
    by Antonio Martinez)
  * fixed SXHASH, giving different results for NIL depending on type
    variable.  (found by Rolf Wester)
  * SBCL does not ignore type declarations for special
  * some bug fixes in contrib/sb-aclrepl/
  * fixed some bugs revealed by Paul Dietz' test suite:
       types got intertwined, has been fixed;
       between INTEGER and RATIO types more completely;
       arguments, which must be proper lists, are really so;
       on malformed property lists;

changes in sbcl-0.7.13 relative to sbcl-0.7.12:
  * incompatible packaging change: in line with Unix convention, 
  * REQUIRE and PROVIDE are now optionally capable of doing something
    useful. See the documentation string for REQUIRE.
  * infrastructure for a managed SBCL contrib system: contributed 
    modules in this release include:
    ** the ASDF system definition facility;
    ** an interface to the BSD Sockets API;
    ** an ACL-like convenience interface to the repl; 
       (thanks to Kevin Rosenberg)
    ** an implementation of ROTATE-BYTE, with efficient implementation
       on x86 hardware;
    gives a closer approximation to the right answer than previously.
    (thanks to Raymond Toy)
    optional environment arguments, as required by ANSI.
  * fixed bugs in other functions taking environment objects, allowing
    calls with an explicit NIL environment argument to be compiled
    without error.
  * fixed bug 228: primary return values from
    :TYPE will no longer signal errors on innocuous objects.
    the lexical environment.
    unprintable packages can now be defined.
  * fixed compiler failure related to checking types of functions.
    (reported by Robert E. Brown)
    treatment of bounding index arguments to sequence functions: in
    invalid sequence bounding indices are passed to functions defined
    by ANSI to operate on sequences.
    packages is now preserved and available in the final Lisp image.
  * lifted FDEFINITION lookup out of loops in the implementation of
    many list operations.  (thanks to Robert E. Brown)
    E. Brown and Tony Martinez respectively)
    better, and is now not vulnerable to having packages renamed.
    to Gerd Moellmann)
    longer signal an error on unreading a character following EOF on
    the previous constituent stream.  (thanks to Tony Martinez)
  * fixed some bugs revealed by Paul Dietz' test suite:
       not just nonnegative fixnums;
       freshly-consed result bit-array);
    ** the type system is now cleverer about negations of numeric
       types, and consequently understands the BIGNUM and RATIO types
    ** the type system is now cleverer about the interaction between
       INTEGER and RATIO types: while bugs still remain, many more
       cases are accurately computed;
       if it is in the last clause;
       all cases;
  * incremented fasl file version number due to the change in the

changes in sbcl-0.7.12 relative to sbcl-0.7.11:
    EVAL now has a compilation optimization policy of (DEBUG 2)
    such code.
  * an experimental implementation of the RETURN command for the
    debugger has been included.  (thanks to Frederik Kuivinen)
    Wolfgang Jenkner).
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** printing and reading of arrays with some dimensions having
       length 0 (thanks to Gerd Moellmann);
       not cause a type error;

changes in sbcl-0.7.11 relative to sbcl-0.7.10:
  * fixed bug 127: DEFSTRUCT now does not clobber old structure
    accessors that are related by inheritance, as specified in the
    Valtteri Vuorikoski)
    a complex lexical environment (e.g. inside a MACROLET).
    to Lutz Euler)
    (thanks to Dag-Erling Smorgrav)
    effect when it is not in a toplevel context.
  * fixed bug 222: DEFMETHOD and SYMBOL-MACROLET interactions now
    stand a better chance of being correct.  (thanks to Gerd
    rational to a bounded real type which excludes the expected
    COERCE and COMPILE functions.
  * fixed bug 223: functional binding is considered to be constant
    only for symbols in the CL package.
    (reported by Robert E. Brown)
    various bugs (including relating to :ALLOCATION :CLASS slots and
    ** As required by ANSI, LOOP now disallows anonymous collection
       clauses such as COLLECT I in conjunction with aggregate boolean
       clauses such as THEREIS (= I 1);
       same loop (including the potentially useful construct analogous
       conditional loop clause;
    ** LOOP with a typed iteration variable over a hashtable now
       signals a type error iff it should.
       argument) no longer signals an error;
       of the slot symbol, rather than using the current package
       current package);
  * incremented fasl file version number, because of the incompatible
    change to the DEFSTRUCT-DESCRIPTION structure, and again because
    of the new implementation of DEFINE-COMPILER-MACRO.

changes in sbcl-0.7.10 relative to sbcl-0.7.9:
  * Support for building SBCL for MIPS platforms running in
    little-endian mode has now been checked in, and basic
    functionality on said platforms verified.
    in which methods and the like are defined, rather than its
  * minor incompatible change: TRUENAME now considers the truename of
    a file naming a directory to be the pathname with :DIRECTORY
    component indicating that directory.
    reason for the previous behaviour is unclear.
  * more systematization and improvement of CLOS and MOP conformance
    in PCL (thanks to Gerd Moellman and Pierre Mai):
       primary methods with no specializers;
       and CLASS-DIRECT-DEFAULT-INITARGS have been implemented for
       FORWARD-REFERENCED-CLASSes; error reporting on
       has been improved;
       instance to return different numbers on distinct instances,
       while preserving the same return value through invocations of
    ** DEFMETHOD signals errors when methods with longer incongruent
       lambda lists are added to generic functions;
       CLASS, as specified in AMOP;
    ** COMPUTE-SLOTS :AROUND now assigns locations sequentially based
       on the order returned by the primary method for classes of
       class STANDARD-CLASS;
  * fixed some bugs shown by Paul Dietz' test suite:
    ** DOLIST puts its body in TAGBODY;
       correct order;
       value producing form;
       variables are bound and made to have no value;
    ** NSUBSTITUTE on list arguments gets the right answer with
       is not a valid sequence index;
       PROGRAM-ERROR when duplicate variable names are found;
       symbol-macro places;
    ** NCONC accepts any object as its last argument;
       Gerd Moellman)
       ignored binding.
    invariant when deleting code.
  * fixed bug 172: macro lambda lists with required arguments after
    Matthew Danish)
    bug. (thanks to Matthew Danish)
    arguments are lexically rebound. (thanks to Gerd Moellmann and
    Pierre Mai)
    is no primary method applicable in a call to a generic
    function. (thanks to Gerd Moellmann)
  * fixed bug in command line argument checking (thanks to Julian
    (thanks to Matthew Danish)
  * incremented fasl file version number, because of the
    SXHASH-related changes in the layout of CLOS data structures

changes in sbcl-0.7.9 relative to sbcl-0.7.8:
  * minor incompatible change: The runtime (the Unix executable named
    Essentially it now requires .core files to descend from the same
    when people patch the sources or change the build parameters
    without changing LISP-IMPLEMENTATION-VERSION, then mix and match
    sbcl and .core files.)
    string values no longer conses excessively. (thanks to Nathan
    Froyd porting Raymond Toy's fix to CMU CL)
    Nathan Froyd, Gerd Moellman and Pierre Mai):
    ** FINALIZE-INHERITANCE is now called on class finalization;
    ** DOCUMENTATION and (SETF DOCUMENTATION) now have the correct
       argument precedence order.
    derived types contradict their declared type.
    so it can be non-toplevel.
    implementation of DEFMACRO).
    safe code, that any length requirement by their type-specifier
    argument is valid.  The exceptions to this are described in bug
    introduced symbol is DECLAREd to be SPECIAL.
  * fixed bug: body of DO-SYMBOLS may contain declarations
    symbol macro only once
  * fixed printing of call frame when argument list is unavailable
  * compiler no longer signals WARNING on unknown keyword

changes in sbcl-0.7.8 relative to sbcl-0.7.7:
  * fixed an inconsistency between gencgc.c and purify.c which made
    dumping/loading .core files unreliable
    the consequent is the same as the alternative, instead of
    misderiving the return type. (thanks to Alexey Dejneka)
    non-printing character is used in a format directive.
    violations of the Python "declarations are assertions" principle
    (thanks to Alexey Dejneka)
  * fixed several bugs in PCL's error checking (thanks to Gerd
  * fixed bug in compilation of functions as first class values
    (thanks to Antonio Martinez-Shotton)
  * The compiler's handling TYPE-ERRORs which it can prove will
    inevitably happen at runtime has been cleaned up and corrected
    in several ways. (thanks to Alexey Dejneka)
  * improved argument type checking for various basic arithmetic
    ways in different special cases
  * fixed bug 181: compiler checks validity of user supplied type
  * cleaned up code flushing in optimization: Function calls which
    should signal errors for safety purposes (e.g. which ANSI says
    should signal errors when their arguments are of incorrect type)
    are no longer optimized away.
  * added new extension: SB-DEBUG:BACKTRACE-AS-LIST
  * incremented fasl file version number, because changes in the
    implementation of sequence functions like COERCE caused 
    in old inline expansions) to become undefined. (Actually these
    changes were later undone, so we might very well be binary
    compatible with 0.7.7 after all, but leaving the version number
    incremented seemed like the simplest and most conservative
    thing to do.)

changes in sbcl-0.7.7 relative to sbcl-0.7.6:
    than the other backends, should be considered still a work in
    mode does not propagate the correct sigcontext structure to
    userspace, and consequently SBCL on a parisc64 kernel will not
    work yet.
  * fixed bug 189: The compiler now respects NOTINLINE declarations for
    suppressed.) Also now that the compiler is looking at declarations
    in the environment, it checks optimization declarations as well,
    and suppresses inlining when (> DEBUG SPEED).
  * More fixes have been made to treatment of floating point exception
    treatment and other Unix signals.  In particular, floating point
  * The detection and handling of control stack exhaustion (infinite
    or very deeply nested recursion) has changed.  Stack exhaustion
    and applies at all optimization settings; when found, a
    SB-KERNEL:CONTROL-STACK-EXHAUSTED condition (subclass of
    be caught using IGNORE-ERRORS.
    correctly when transforming recursive LABELS functions to LETs.
    (thanks to Alexey Dejneka)
    that are names of constants or global variables.
    alien routines with docstrings.
    Raymond Toy)
    (thanks to Eric Marsden)
  * Bug fix: The SPARC backend can now compile functions involving
    to a functions expecting a PATHNAME-DESIGNATOR.
  * Bug fix: DEFGENERIC now enforces the ANSI restrictions on its
    lambda lists. (thanks to Alexey Dejneka)
  * Bug fix: changed encoding of PCL's internal MAKE-INSTANCE
    functions so that EXPORTing the name of the class doesn't cause
    MAKE-INSTANCE functions from earlier DEFCLASSes to get lost (thanks
    to Antonio Martinez for reporting this)
    constant-folded without failing an assertion. (thanks to Einar
    Floystad Dorum for reporting this)
    types are now dealt with more correctly by the compiler.
    behaviour analogous to RENAME-FILE.  This puts its behaviour more
    Marco Antinotti)
    bug fix involving the names of PCL MAKE-INSTANCE functions)

changes in sbcl-0.7.6 relative to sbcl-0.7.5:
  * bug fix: Floating point exceptions are treated much more
    consistently on the x86/Linux and PPC/Linux platforms.
    cases when the compiler cannot open code the array creation, but
    array accesses have also seen a speed increase.
    SBCL and ILISP: thanks to Gregory Wright for diagnosing this and
    reporting the bug.)
  * bug fix: Internal error arguments for undefined functions are now
    computed correctly on the PPC/Linux platform.
    Raymond Toy's patch for CMU CL)
  * Support for the Solaris 9 operating environment has been included
    (thanks to Daniel Merritt)
    of the manual has been created by reformatting the corresponding
    CMU CL manual chapter into (currently very ugly and incoherent)
    manual is now essentially complete, at least by my extreme
    is no longer a static symbol.)

changes in sbcl-0.7.5 relative to sbcl-0.7.4:
  * SBCL now builds with OpenMCL (version 0.12) as the
    bootstrapping under CLISP.
    Alpha architecture.
    increments different from 1; fixing this turned out also to fix
    bug 164.
    despite the presence of perfectly good SPECIAL declarations (thanks
    to David Lichteblau)
    accepting initargs. (thanks to Espen Johnsen and Pierre Mai)
    characters in them.
  * bug 180 fixed: Method combination specifications no longer ignore
  * bug fix: Structure type predicate functions now check their argument
    count as they should.
    correctly. (thanks to Pierre Mai)
  * minor incompatible change: The --noprogrammer option is deprecated
    --userinit files will be affected differently.) The
    been added to allow this functionality to be controlled from ordinary
    maintainers, who might want to run non-interactive scripts to
    build SBCL cores which will later be used interactively.)
    Instead, an error of type FILE-ERROR is signalled.

changes in sbcl-0.7.4 relative to sbcl-0.7.3:
    invariants more correctly now so that it doesn't crash. (thanks
    to Alexey Dejneka)
    to Pierre Mai)
    (thanks to Christophe Rhodes)
    Dan Barlow)
    to Christophe Rhodes)
  * The fasl file format has changed again, because dynamic loading
    in the way that foreign symbols are transformed and passed around.

changes in sbcl-0.7.3 relative to sbcl-0.7.2:
    Froyd porting CMU CL code originally by Douglas Thomas Crosher)
    (thanks to Dan Barlow)
  * SBCL now runs on the Solaris operating system on SPARC architectures
    (thanks to Christophe Rhodes's port of the CMUCL runtime)
  * SPARC backend cleanups, allowing builds of cores optimized for V8
    backend chosen at runtime (thanks to Christophe Rhodes and Raymond
  * SBCL is closer to bootstrapping under CLISP, thanks to various
    fixes by Christophe Rhodes.
    INFO database to support symbol macros.
    (thanks to coreythomas)
  * The system is smarter about SUBTYPEP relationships, especially
    those involving NOT types (including types such as ATOM which are
    represented internally using NOT types). Thus SUBTYPEP is less
    Christophe Rhodes)
  * The fasl file format has changed again, because the internal
    representation of types now includes a new slot to support the new
    SUBTYPEP-of-NOT-types logic.
    dispatch macro character combinations. (thanks to Alexey Dejneka)
    that superficially look like logical namestrings correctly.
    can deal with.
    Martin Atzmueller)

changes in sbcl-0.7.2 relative to sbcl-0.7.1:
  * incompatible change: The compiler is now less aggressive about
    seems much closer to the likely performance optimum for modern
    systems than the old 4M value was)
    of CMU CL's support for SPARC, and various endianness and other 
    SBCL portability fixes due to Christophe Rhodes and Dan Barlow)
  * bug fixes:
       its introduction in this version should be particularly timely
       for anyone whose code fails because of suppression of tail
       devious way, to avoid segfaults when the C library version differs
    ** The compiler no longer issues bogus style warnings for undefined
       classes in the same source file as the DEFCLASSes which defined
       for fixing this)
    ** fixes in CONDITION class precedence list for undefined function
       errors (thanks to Alexei Dejneka)
       correctly. (thanks to Dan Barlow)
    ** portability fixes aiming at bootstrapping under CLISP (thanks
       to Dave McDonald and Christophe Rhodes)
       Christophe Rhodes)
  * several changes related to debugging:
    ** suppression of tail recursion, as noted above
    ** stack overflow detection, as noted above
       reliable than the breakpoint-based :ENCAPSULATE NIL
       encapsulation also seems closer to the spirit of the ANSI

changes in sbcl-0.7.1 relative to sbcl-0.7.0:
* mostly bug fixes:
     vital for most things which interface to C-level interfaces,
     like extensions working with sockets or databases or
     Perl-compatible regexes or whatever, and the need to fix
     this bug is the main reason that 0.7.1 was released so
     soon after 0.7.0.)
     reLOADing a previously-LOADed file containing DEFGENERICs does
     fixed by Christophe Rhodes. (He actually submitted this patch
     months ago, and I delayed until after 0.7.0.)
  ** Bug 111 (internal compiler confusion about runtime checks on
     FUNCTION types) was fixed by Alexey Dejneka.
* Some internal cleanups (getting rid of variables which aren't
  needed now that the byte interpreter is gone) caused the fasl
  file format number to change again.

changes in sbcl-0.7.0 relative to sbcl-0.6.13:
  default extension for files produced by COMPILE-FILE, has changed
* compiler changes:
     SBCL is now essentially a compiler-only implementation of ANSI
     almost all the interesting cases are handled by creating
     a LAMBDA expression, calling COMPILE on it, then calling 
     FUNCALL on the result.
     the new code is substantially simpler and clearer, and hopefully
     any remaining bugs will be simpler, less fundamental, and more
     fixable then the bugs in the old code.
     In particular,
     *** The debugging information it produces (particularly the names
         of FUNCTION objects) is sometimes much less useful than what
         the old compiler produced.
         within a MACROLET) has been temporarily weakened.
  ** There are new compiler optimizations for various functions:
     *** the math functions TRUNCATE, FLOOR, and CEILING
     *** the function-of-all-trades COERCE
     Mostly these should be transparent, but there's one
     potentially-annoying problem (bug 117): when the compiler
     it can create control paths which have type mismatches, and
     when it can't prove that those control paths aren't taken,
     it will issue WARNINGs about the type mismatches. This is 
     a particular problem in practice for the new sequence functions.
     occasional inlining problems and new inline expansions -- some
     of the new sequence function optimizations won't really kick in
     completely until debugging information, and then inlining, are
     straightened out in some future version.)
* minor incompatible changes:
     DIRECTORY no longer implicitly promotes NIL slots of its
  ** changes in behavior that ANSI explicitly defines to be
     implementation dependent:
         but acts a little different than before. Besides the obvious
	 changes in performance tradeoffs (that the cost per form passed
	 because there are no longer any interpreted function objects.
         COMPILED-FUNCTION-P is now synonymous with FUNCTIONP, and
         e.g. doing COMPILE on the output of interactive DEFUN is
         now a no-op.
         from 100 to 1000.
         has changed from (:CL) to NIL.
         ANSI Common Lisp standard, is now based on their ASCII symbolic
         are no longer used for output.
  ** changes in internal implementation constants:
         increasing it even more.)
     However, almost all old code should still continue to work without
     for SB-ALIEN.
     favor of new corresponding names DEFINE-FOO, for consistency with
     internal symbols, but a few supported extensions like
     etc. as you get deeper into recursive calls to the debugger
     sequence. (I was motivated to do this when squabbles between
     short term, this change will probably provoke more ILISP/SBCL 
     function, since declaiming return types involving aliens is
     compilation of code which calls such functions.
     longer reexported by the SB-EXT package. They're solely useful
     built into the system.
* many other bug fixes
  ** DEFSTRUCT and DEFCLASS have been substantially updated to take
     ways. Martin Atzmueller is responsible for a lot of this.
  ** Besides the cleanups discussed above, Martin Atzmueller fixed
     several other bugs:
     *** fixes in READ-SEQUENCE and WRITE-SEQUENCE
     *** correct ERROR type for various file operations
     *** some fixes for Lisp streams
     *** DEFMETHOD syntax checking
     *** changing old weird representation of debug information as
         strings (which, among their other deficiencies, don't transform
         correctly when you rename packages, and don't change their
         print representation when you change things like *PACKAGE*
     He also made several improvements and fixed several bugs in DESCRIBE.
     discovered himself:
     *** misbehavior of WRITE-STRING/WRITE-LINE
         and several other LOOP problems as well
     *** DIRECTORY when similar filenames are present
     *** DEFGENERIC with :METHOD options
     *** argument ordering in FIND with :TEST option
     *** mishandled package designator argument in APROPOS-LIST
     *** various problems in the backquote readmacro
     *** a bug in APROPOS
         since the CVS log documents them by reference to sbcl-devel
     PPC port, for those of you who think different).
  ** Besides the DIRECTORY fixes and changes mentioned elsewhere,
     it's trying to decide whether to truncate output. Thus e.g.
       (let ((*print-lines* 50))
         (pprint-logical-block (stream nil)
           (dotimes (i 10)
             (let ((*print-lines* 8))
     often truncating it at 8 lines, as it did before.
  SourceForge has shut down its anonymous FTP service, and with it
  my original plan for distributing the old CMU CL documentation
  SBCL source release and extract them from it.
  some of which are apparent above.

changes in sbcl-0.6.13 relative to sbcl-0.6.12:
* Martin Atzmueller ported Tim Moore's marvellous CMU CL DISASSEMBLE
  patch, so that DISASSEMBLE output is much nicer.
  I still haven't decided what the final interface should look like
  (I'd like PROFILE to interact cleanly with TRACE, since both
  facilities use function encapsulation) but if you have a need
  for profiling now, you can probably use it successfully with
  the current CMU-CL-style interface.
  Also, at Dan Barlow's suggestion, TRUENAME on a dangling symbolic
  link now returns the dangling link itself, and for similar
  reasons, TRUENAME on a cyclic symbolic link returns the cyclic
  looped endlessly, respectively.) Thus, DIRECTORY now works even
  in the presence of dangling and cyclic symbolic links.
  is now a supported extension again, since the consensus on
  sbcl-devel was that it can be useful for ordinary development
  work, not just for debugging SBCL itself.
  that currently-defined functions might be redefined later with 
  different return types. 
  of Eric Marsden and SBCL code of Martin Atzmueller.
* better error handling in CLOS method combination, thanks to 
  Martin Atzmueller porting Pierre Mai's CMU CL patches
* more overflow fixes for >16Mbyte I/O buffers
  line (not two) to exit SBCL.
  undisplaced arrays.
  does the right thing.
* The implementation of some type tests, especially for CONDITION
  originally by Douglas Crosher, ported by Martin Atzmueller.
* Some math functions have been fixed, and there are new
  likely to be built into sbcl-0.7.0.)
  CL, ported to SBCL by Martin Atzmueller)
  patch to CMU CL, ported to SBCL by Martin Atzmueller)
* Martin Atzmueller and Bill Newman fixed some bugs in INSPECT.
  the after-xc.core file needed by slam.sh.
  gets an entry point, so that block compilation looks a little
  more like the plain vanilla ANSI section scheme.
  returns the number of bytes consed since the system started,
  rather than the number consed since the first time the function
  was called. (The new definition parallels ANSI functions like
  since historically most system changes which required version
  number changes have affected all CPUs equally. Similarly, 
  the byte fasl file version is now equal to the ordinary
  fasl file version.

changes in sbcl-0.6.12 relative to sbcl-0.6.11:
* incompatible change: The old SB-EXT:OPTIMIZE-INTERFACE declaration
  its existing behavior was poorly specified, as well as incorrectly
* many patches ported from CMU CL by Martin Atzmueller, with 
  half a dozen others elsewhere
  from Nathan Froyd and CMU CL patches from Raymond Toy they're not
  as flaky as they were.
  behavior is slightly different in detail from what the old man
  page claimed it would do, but it's still appropriate under the
  same circumstances that the man page talks about.)
  handle many floating point and complex operations much less
  inefficiently. (Thus e.g. you can implement a complex FFT
  without consing!)
* The compiler now detects type mismatches between DECLAIM FTYPE 
  thanks to patches from Martin Atzmueller.
* various fixes to make the cross-compiler more portable to
  Lispworks for Windows, following bug reports from Arthur Lemmens)
  ANSI noncompliance in DEFMACRO &KEY argument parsing, have been
  fixed thanks to Pierre Mai's CMU CL patches.
* fixes to keep the system from overflowing internal counters when
  it tries to use i/o buffers larger than 16M bytes
* fixed bug 45a: Various internal functions required to support
  complex special functions have been merged from CMU CL sources.
* improved support for type intersection and union, fixing bug 12
  more obscure bugs as well
* some steps toward byte-compiling non-performance-critical
  parts of the system, courtesy of patches from Martin Atzmueller
* Christophe Rhodes has made some debian packages of sbcl at
* new fasl file format version number (because of changes in 

changes in sbcl-0.6.11 relative to sbcl-0.6.10:
  current SBCL.
* DESCRIBE now works on structure objects again.
* Most function call argument type mismatches are now handled as
  STYLE-WARNINGs instead of full WARNINGs, since the compiler doesn't
  know whether the function will be redefined before the call is
  it doesn't keep track of enough information to know whether calls
  are local in this sense.)
* Compiler output is now more verbose, with messages truncated
  to override the default verbosity, but I haven't decided how to 
* Fasl file format version numbers have increased again, because
  support for the Gray streams extension changes the layout of the
  system's STREAM objects.
* The Gray subclassable streams extension now works, thanks to a 
  patch from Martin Atzmueller.
* The full LOAD-FOREIGN extension (not just the primitive
  but like most other programs, it defaults to copying the Unix
  environment from the original process instead of starting the
  new process in an empty environment.
* Extensions which manipulate the Unix environment now support
  an :ENVIRONMENT keyword option which doesn't smash case or 
  for porting convenience.
  as per Daniel Barlow's suggestion and Martin Atzmueller's patch

changes in sbcl-0.6.10 relative to sbcl-0.6.9:

* A patch from Martin Atzmueller seems to have solved the SIGINT
* The system no longer defaults Lisp source file names to types
* The compiler no longer uses special default file extensions for
  seems to expect a single default extension for all compiled code,
  and there's no compelling reason to try to stretch the standard
  default to the same extension as native-compiled files.
* Fasl file format version numbers have increased again, because
  a rearrangement of internal implementation packages made some 
  dumped symbols in old fasl files unreadable in new cores.
  many fewer weird special cases.
  thanks to a patch from Martin Atzmueller.
  by Tim Moore, ported to SBCL by Martin Atzmueller.
* Martin Atzmueller fixed several filesystem-related problems,
  written in part by Paul Werkowski.
  more patches from Martin Atzmueller.
  some time ago.

changes in sbcl-0.6.9 relative to sbcl-0.6.8:

* DESCRIBE now works on CONDITION objects.
* The debugger now handles errors which arise when trying to print
  debugging features enabled, without having to worry about propagating it
  should be constructed the same way as before.
* fixed bugs in DEFCONSTANT ANSI-compatibility:
     to implement the DEFCONSTANT-EQX macro.)
     non-toplevel DEFCONSTANTs are uncommon.)
  incremented, because the old noncompliant DEFCONSTANT behavior involved
  redid debugger restarts and related debugger commands somewhat while
  doing so:
     Invoking the new TOPLEVEL restart provides the same functionality.
     the CONTINUE restart directly instead.
     FRAME 0 command, and since it interfered with abbreviations for the
     TOPLEVEL restart.
  some porting work by Martin Atzmueller)
* Martin Atzmueller reviewed the CMU CL mailing lists and came back
  have been applied,
     are prefixed by semicolons, to help people who like to use
     syntax highlighting in their ILISP buffer. (This patch
     was originally due to Raymond Toy.)
     patches originally written by Raymond Toy.
  ** The compiler understands coercion between single-value and 
     multiple-VALUES type expressions better, getting rid of some very
     weird behavior, thanks to patches originally by Robert MacLachlan
     and Douglas Crosher.
     lambda lists, thanks to a patch originally by Pierre Mai.
  ** The system no longer bogusly warns about "abbreviated type
     thanks to some patches originally by Tim Moore.
     files, thanks to a patch originally from Douglas Crosher.
  undefined function error.
  installed, at least appropriate type errors are generated
* fixed bug 8: better reporting of various PROGRAM-ERRORs
  consistently in DEFMETHOD forms. 
  it doesn't seem to affect SBCL after all
* The C runtime system now builds with better optimization and many
  fewer warnings, thanks to lots of cleanups by Martin Atzmueller.

changes in sbcl-0.6.8 relative to sbcl-0.6.7:

  CVS repository on my home machine).
* The new signal handling code has been tweaked to treat register
  downstream, e.g. in debug-int.lisp, has implicit dependencies
  on the unsignedness of integer representation of machine words, 
  and that caused the system to bomb out with infinite regress
  when trying to recover from type errors involving signed values,
  implementation of MAP (from the cmucl-imp@cons.org mailing
  inline the MAP operation, and there is more than one
  sequence argument to the MAP call (so that it can't just
  do ETYPECASE once and for all based on the type of the
  single sequence argument). (The old non-inline implementation
  have been added.
* Raymond Wiker's patches to port dynamic loading from Linux to
  FreeBSD have been added.
  to Martin Atzmueller's review of it.
* The debugger now flushes standard output streams before it begins
  its output ("debugger invoked" and so forth).
* The core version number and fasl file version number have both
  been incremented, because of incompatible changes in the layout
  of static symbols.
  used to not be called for a saved Lisp image.)
* Instead of installing Martin Atzmueller's patch for the
  compiler transform for SUBSEQ, I deleted the compiler transform,
  and transforms for some similar consing operations.
  has been fixed.
  away by constant folding
* The system now defines its address space constants in one place
  (in the Lisp sources), and propagates them automatically elsewhere
  address map is less unnecessarily tedious and error-prone. The
  Lisp names of address space constants have also been systematized.
  the sources, because they have never saved me trouble and
  they've been source of trouble working with patches and other
  diff-related operations.

changes in sbcl-0.6.7 relative to sbcl-0.6.6:

* The system has been ported to OpenBSD.
  by hand, the make.sh takes care of it for you.
* The system is no longer so grossly inefficient when compiling code
  which dares to use the various sequence functions on non-simple 
  vectors, takes less of a performance hit.
    ETYPECASE used in DATA-VECTOR-REF is now compiled reasonably
    without making full calls to SUBTYPEP at runtime.
  (Some analogous efficiency issues for non-simple vectors specialized to
  have not been addressed. They could almost certainly be handled the
  same way if anyone is motivated to do so.)
* The changes in array handling break binary compatibility, so
  instead of (VALUES T T).
  functionality is not implemented (since it calls ld to resolve
  library references automatically, requiring RUN-PROGRAM for its
  try to resolve library references) is now supported.
* The source transform for TYPEP of array types no longer assumes
  type will be interpreted at runtime.
* Since my laptop doesn't have hundreds of megabytes of memory like
     uninterned after cold init. To support this, those things have
     symbols with such names are now uninterned after cold init).
     fasl files for cold load.
  looked too complicated, so I punted for now.)
  I'll probably just bump it back up.)
  as per ANSI.
  the BUGS list; some have even been fixed.
  code easier to understand, renaming various functions and variables
  with less ambiguous names, and changing some function calling
  support for non-POSIX signal handling, added various comments, 
  tweaked the code to reduce the number of compilation warnings, and
  renamed some files to increase consistency.
* To support the new automatic configuration functionality in make.sh,
  file local-target-features.lisp-expr.
  "lisp -batch" as cross-compilation host works again

changes in sbcl-0.6.6 relative to sbcl-0.6.5:

* DESCRIBE no longer tries to call itself recursively to describe
* DESCRIBE now works on generic functions.
  used to mark empty slots in hash tables. Thus 
  similar noncompliant behavior if bang on the hash table
  implementation with all the symbols you get back from 
  This breaks binary compatibility, since tests for equality to 
  :EMPTY are wired into things like the macroexpansion of 
* There's now a minimal placeholder implementation for CL:STEP,
  as required by ANSI.
  compiler, inlining, and structure predicates has been patched
  mailing list).
* Missing ordinary arguments in a macro call are now detected even
  when the macro lambda list contains &KEY or &REST.
* The debugger no longer complains about encountering the top of the
* As specified by ANSI, the system now always prints keywords
  KEYWORD package.
* Type information from CLOS class dispatch is now propagated
  into DEFMETHOD bodies, so that e.g.
	  (+ X 123.0))
  is now basically equivalent to 
	  (+ X 123.0))
  operation, without having to do run-time type dispatch.
* The macroexpansion of DEFMETHOD has been tweaked so that it has
  reasonable behavior when arguments are declared IGNORE or IGNORABLE.
  any more (and since my archive of sbcl-x.y.zv.tar.bz2 snapshots
  still very little control of where low-level verbose GC functions
* The C source files now include boilerplate legalese and documentation
* At Dan Barlow's suggestion, the hyperlink from the SBCL website

changes in sbcl-0.6.5 relative to sbcl-0.6.4:

  GNUMAKE environment variable.
  can build without error under CMU CL.

changes in sbcl-0.6.4 relative to sbcl-0.6.3:

  text cribbed from the CMU CL manual). 
  CMU CL profiler and simplifying and cleaning up). Eventually the
  exported from the package SB-PROFILE.
* Some problems left over from porting CMU CL to the new
  cross-compilation bootstrap process have been cleaned up:
     instead of SB!XC:DEFMACRO, compounded by an oversight on my 
     being initialized before the type system knew the final
     definition of the 'NULL type. This screwed up several key
     optimizations in the compiler, causing inefficiency in all sorts
     GET-INTERNAL-RUN-TIME was consing.) 
  PROCLAIM FTYPE information. Unfortunately this broke binary 
  compatibility again, since now the forms output by DEFGENERIC
  to refer to functions which didn't exist in 0.6.3.
  inline code
* changed (MOD 1000000) type declarations for Linux timeval.tv_usec slot
  occasionally get blown up by Linux returning 1000000 microseconds
* fixes to problems pointed out by Martin Atzmueller:
  * The manual page no longer talks about multiprocessing as though
    it were currently supported.
  * The ILISP support patches have been removed from the distribution,
    because as of version 5.10.1, ILISP now supports SBCL without us
    having to maintain patches.
  EQUALP comparison of HASH-TABLE

changes in sbcl-0.6.3 relative to sbcl-0.6.2:

* The system still can't cross-compile itself with
* This release breaks binary compatibility again. This time 
  problem can be detected reliably instead of just causing weird errors.
* various new style warnings:
  as specified by ANSI.
* *RANDOM-STATE* is no longer automatically initialized from 
  default behavior of the system is to repeat its behavior every time
  repeat its behavior every time it was run.
* Support for the pre-CLTL2 interpretation of FUNCTION declarations as
  FTYPE declarations has been removed, in favor of their ANSI
  argument types can be determined at compile time.
* The optimizer now transforms COERCE into an identity operation when it 
  optimization transforms, such as the MAP transform above.)
* Source file headers have been made more standard.
* The CASE macro now compiles without complaining even when it has
  no clauses.

changes in sbcl-0.6.2 relative to sbcl-0.6.1:

* (Note that the way that the PCL macroexpansions were rewritten
  to accommodate the change in DEFGENERIC below breaks binary
  i.e. hit release 1.0.0, we'll probably try to maintain binary
  compatibility between maintenance releases, e.g. between sbcl-1.4.3
  for maintenance releases to break binary compatibility.)
  has been fixed.
* The reporting of unhandled signals has been changed to print some
  explanatory text as well as the report form. (Previously only
  the report form was printed.)
* The macroexpansion for DEFGENERIC now DECLAIMs the function that
  it defines, so that the compiler no longer issues undefined function
  section of the ANSI spec are supported.
  The reader still handles symbol tokens which begin with a package marker
* The system now issues STYLE-WARNINGs for contradictory TYPE 
  proclamations. (Warnings for contradictory FTYPE proclamations would
  is made smarter about FUNCTION types.)
  target and imply that there's a related file which exists on the
  lot of renaming. Hopefully the acute confusion caused by the renaming
  will be justified by the reduction in chronic confusion..
  ** runtime-type.lisp    -> early-target-type.lisp
  ** target-type.lisp     -> late-target-type.lisp
  ** early-host-format.lisp -> early-format.lisp
  ** late-host-format.lisp -> late-format.lisp
  ** host-error.lisp      -> misc-error.lisp
  ** early-error.lisp     -> early-target-error.lisp
  ** late-error.lisp      -> late-target-error.lisp
  ** host-defboot.lisp    -> early-defboot.lisp
  ** code/misc.lisp       -> code/target-misc.lisp
  ** code/host-misc.lisp  -> code/misc.lisp
  ** code/numbers.lisp    -> code/target-numbers.lisp
  ** code/early-numbers.lisp -> numbers.lisp
  ** early-host-type.lisp -> early-type.lisp
  ** late-host-type.lisp  -> late-type.lisp
  ** host-typep.lisp      -> typep.lisp
  ** load.lisp            -> target-load.lisp
  ** host-load.lisp       -> load.lisp
  ** host-disassem.lisp   -> disassem.lisp
  ** host-insts.lisp      -> insts.lisp
  ** byte-comp.lisp       -> target-byte-comp.lisp
  ** host-byte-comp.lisp  -> byte-comp.lisp
  ** host-signal.lisp     -> signal.lisp
  ** host-defstruct.lisp  -> defstruct.lisp
  know more about target types.
  corresponding to the slots of the old structure.
  into the target SBCL has been fixed.
* The chill.lisp system for loading cold code into a running SBCL
  now works better.
  derived from, and stale in sbcl-0.6.1.)
* Various errors in the cross-compiler type system were detected
  but some hard problems remain, so the compiler is back to 
  running without *TYPE-SYSTEM-INITIALIZED* for now.
* I have started adding UNCROSS calls throughout the type system
  and the INFO database. (Thus perhaps eventually the blanket UNCROSS
  kludges with it).
* CONSTANTP now returns true for quoted forms (as explicitly required
  by the ANSI spec).

changes in sbcl-0.6.1 relative to sbcl-0.6.0:

  for the problem of printing dozens of lines of distracting information
  on entry to the debugger when an undefined function was called.
  is not reset to COMMON-LISP-USER. 
* Compilation of stuff related to dyncount.lisp has been made conditional
  smaller. The various dyncount-related symbols have been moved into
  a new "SB-DYNCOUNT" package.
* tty-inspect.lisp has been renamed to inspect.lisp.
  invisible at the user level.)
  have been removed if obsolescent, or given better documentation, or
  sometimes given more-mnemonic names.

changes in sbcl-0.6.0 relative to sbcl-0.5.0:

* tidied up "make.sh" script
* tidied up system directory structure
* better "clean.sh" behavior
  trailing #\. character in DESCRIBE-INSTANCE
* new hashing code, including EQUALP hashing
* tidied up Lisp initialization and toplevel
* command line argument processing
  terminating SBCL on EOF
* non-verbose GC by default
  runtime executable (just like CMU CL).
  symbol and package information as Lisp native symbol and package objects
  transformed along with everything else.
* tweaked the optimization policy declarations which control the building
  source location debugging information. (This helps two problems at once
  debugging and testing purposes
  methods, giving nearly-ANSI behavior
* moved some files out of cold init into warm init
  with (VALUES) forms
* regularized formatting of source files
* added an install.sh script
* fixed ridiculous memory usage of cross-compiler by making
  compiler/alloc.lisp not try to do pooling unless it can hook
  builds nicely on my old laptop.
* added :SB-ALLOC in target-features.lisp-expr
  was not implemented)
  are no longer handled by signalling conditions. Style warnings
  and warnings are handled more correctly and reported in such a way
  return FAILURE-P).
* changed the severity of several compiler warnings from full WARNING
  compiler note reporting so that it doesn't use the condition system
  COMPILE-FILE command)
  no longer supported, since their implementation was deeply intertwingled
* Compiled files containing forms which have side effects on the Lisp
  (Compiler queuing of top level lambdas has been suppressed by setting
  maintain them.
  known to be able to handle the current sources
  how the wrapping and unwrapping of functions when you profile them
  interacts with the wrapping and unwrapping of functions when you
  the interface specification is there. Hopefully, the functionality will
  arrive with some future maintenance release.)
* removed host-oops.lisp
* changed signature of QUIT function to allow UNIX-CODE argument
* fixed READ-SEQUENCE bug
  output that ANSI specifies for functions like LOAD
  the sbcl executable