Tags

sbcl.1.0.17

sbcl_1_0_17

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
    requesting it. Please consult sbcl-devel for advice if you need to
    use this feature in the meanwhile.
  * new feature: runtime argument --control-stack-size can be used to
    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.
    ** CPU percentage report (computed from real and total run time.)
    ** more comprehensive run time reporting, using a condenced format
    ** interperted form, lambda, and page fault counts are omitted
       when zero.
  * optimization: ADJOIN and PUSHNEW are upto ~70% faster in normal
    SPEED policies.
  * optimization: APPEND is upto ~10% faster in normal SPEED policies.
  * optimization: two argument forms of LAST are upto ~10% faster
    in normal SPEED policies.
  * optimization: NCONC no longer needs to heap cons its &REST list
    in normal SPEED policies.
  * bug fix: SB-FLUID build feature no longer breaks the build. (thanks
    to Sidney Markowitz)
  * bug fix: UNION and NUNION work with :TEST-NOT once more,
    regression since 1.0.9.1. (thanks to Eric Marsden)
  * bug fix: result of MAKE-ARRAY can be stack allocated - regression
    since 1.0.15.36. (thanks to Paul Khuong)
  * bug fix: LAST when always returned the whole list when given a bignum
    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
    reference.
  * bug fix: fasl header checking is less vulnerable to different
    platform word lengths.
  * bug fix: more correct assembler syntax for GNU binutils
    2.18.50.0.4 support.  (thanks to Marijn Schouten)
  * bug fix: fix ECASE warnings from CMUCL-as-xc-host.  (reported by
    Andreas Franke)
  * bug fix: the fopcompiler can handle LOCALLY forms (with no
    declarations) successfully.  (reported by Attila Lendvai)

sbcl.1.0.16

sbcl_1_0_16

changes in sbcl-1.0.16 relative to 1.0.15:
  * minor incompatible change: revert the changes to sb-posix's error
    signaling added in 1.0.14.
  * minor incompatible change: change PROBE-FILE back to returning
    NIL whenever we can't get a truename, as was the case before 1.0.14.
  * minor incompatible change: SB-BSD-SOCKETS:NAME-SERVICE-ERROR now
    inherits from ERROR instead of just CONDITION.
  * new feature: SB-INTROSPECT can provide source locations for instances
    as well. (thanks to Tobias Rittweiler)
  * optimization: binding special variables now generates smaller code
    on threaded platforms.
  * optimization: MEMBER and ASSOC are over 50% faster for :TEST #'EQ
    and cases where no :TEST is given but the compiler can infer that
    the element to search is of type (OR FIXNUM (NOT NUMBER)).
  * 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.
  * fixed bug 423: TRULY-THE and *CHECK-CONSISTENCY* interaction.
  * bug fix: SB-BSD-SOCKETS:MAKE-INET-ADDRESS checks the input string
    for wellformedness and returns a specialized vector. (reported by
    Francois-Rene Rideau)
  * bug fix: FIND-CLASS was not thread-safe. (reported by Attila Lendvai)
  * bug fix: ~R was broken for vigtillions. (thanks to Luis Oliveira)
  * bug fix: attempt to obtain *SCHEDULER-LOCK* recursively when
    unscheduling timer at the same time as another timer fires.
  * bug fix: don't reschedule timers for dead threads.
  * bug fix: periodic polling was broken. (thanks to Espen S Johnsen)
  * bug fix: copying output from RUN-PROGRAM to a stream signalled
    bogus errors if select() was interrupted.
  * enhancement: add support for fcntl's struct flock to SB-POSIX.

sbcl.1.0.15

sbcl_1_0_15

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.
  * enhancement: untracing a whole package using (UNTRACE "FOO") is
    now supported, and tracing a whole package using (TRACE "FOO") now
    traces SETF-functions as well.
  * enhancement: implement SB-POSIX:MKTEMP and SB-POSIX:MKDTEMP.
  * SB-DEBUG:PRINT-FRAME-CALL now prints the entry-point kind even
    when SB-DEBUG:*SHOW-ENTRY-POINT-DETAILS* is NIL.
  * unreadably printed representation of hash-tables now includes
    weakness if any.
  * bug fix: partially fixed #188: type propagation from assignments
    is now more efficient.
  * bug fix: fixed #407: (COERCE X 'SINGLE-FLOAT) and (COERCE X
    'DOUBLE-FLOAT) are not flushable.
  * bug fix: on x86 and x86-64 pointer based EQ-hashing now uses the
    full address of the object, and none of the tag bits.
  * bug fix: readably printing hash-tables now respects other printer
    control variables.  (reported by Cedric St-Jean)
  * bug fix: compiler gave a bogus STYLE-WARNING for the :SYNCHRONIZED
    keyword with MAKE-HASH-TABLE.
  * bug fix: export SB-POSIX:MKSTEMP.
  * bug fix: SORT was not interrupt safe.
  * bug fix: XREF accounts for the last node of each basic-block as
    well.
  * bug fix: MAKE-INSTANCE optimizations interacted badly with
    non-keyword :DEFAULT-INITARGS in the presence of :BEFORE/:AFTER
    methods on SHARED-INITIALIZE.  (thanks to Matt Marjanovic)
  * bug fix: the CTOR optimization for MAKE-INSTANCE should no longer
    create obsolete instances in the case of redefinition or
    obsoletion of a superclass.  (thanks to Andy Hefner)
  * bug fix: Support for the Alpha architecture has been revived; it had
    suffered somewhat from lack of maintenance since sbcl-1.0.
  * improvements to the Windows port:
     ** The system detects the codepage to use at startup, instead of
        using the value from the saved core. (thanks to Kei Suzuki)

sbcl_1_0_14

changes in sbcl-1.0.14 relative to sbcl-1.0.13:
  * new feature: SB-EXT:*EXIT-HOOKS* are called when the process exits
    (see documentation for details.)
  * revived support for OpenBSD (contributed by Josh Elsasser)
  * partially fixed bug #108: ROOM no longer suffers from occasional
    (AVER (SAP= CURRENT END)) failures.
  * fixed bug #402: proclaimed non-standard declarations in DEFMETHOD
    bodies no longer cause a WARNING to be signalled. (reported by
    Vincent Arkesteijn)
  * bug fix: (TRUNCATE X 0) when X is a bignum now correctly signals
    DIVISION-BY-ZERO. Similarly for MOD and REM (which suffered due to
    the bug in TRUNCATE.) (reported by Michael Weber)
  * bug fix: SB-SPROF:REPORT no longer signals an error if there are
    no samples. (reported by Andy Hefner)
  * bug fix: functions compiled using (COMPILE NIL '(LAMBDA ...))
    no longer appear as (NIL ...) frames in backtraces.
  * bug fix: RESOLVE-CONFLICT (and the other name conflict machinery)
    is now actually exported from SB-EXT as documented.  (reported by
    Maciej Katafiasz)
  * bug fix: sb-aclrepl now correctly understands how to inspect
    single-floats on 64-bit platforms where single-floats are not boxed.
  * bug fix: SB-MOP:CLASS-SLOTS now signals an error if the class has not
    yet been finalized. (reported by Levente Meszaros)
  * bug fix: CLOSE :ABORT T behaves more correctly on Windows.
  * DESCRIBE and (DOCUMENTATION ... 'OPTIMIZE) describe meaning of
    SBCL-specific optimize qualities.

sbcl_1_0_12

changes in sbcl-1.0.12 relative to sbcl-1.0.11:
  * new feature: MAKE-HASH-TABLE now experimentally accepts a
    :SYNCHRONIZED argument, which makes the hash-table safe for
    concurrent accesses (but not iteration.) See also:
    SB-EXT:WITH-LOCKED-HASH-TABLE, and
    SB-EXT:HASH-TABLE-SYNCHRONIZED-P.
  * optimization: CONCATENATE on strings is an order of magnitude faster
    in code compiled with (> SPEED SPACE).
  * optimization: SUBSEQ is ~50% faster on lists.
  * bug fix: bug 417 fixed -- source location reporting is now more robust.
  * bug fix: SUBSEQ on a list will now correctly signal an error if if
    END is smaller then START.
  * bug fix: SB-PROFILE will no longer report extra consing for nested
    calls to profiled functions.
  * bug fix: ROOM implementation had bogus fixnum declarations which
    could cause type-errors when calling ROOM on large images.
  * bug fix: if file compilation is aborted, the partial fasl is now
    deleted, and COMPILE-FILE returns NIL as the primary value.
  * bug fix: number of thread safety issues relating to SBCL's internal
    hash-table usage have been fixed.
  * bug fix: SB-SYS:WITH-PINNED-OBJECTS could cause garbage values to
    be returned from its body when the values were being returned
    using unknown-values return convection and the W-P-O was wrapped
    inside an UNWIND-PROTECT.
  * bug fix: sb-posix should now compile again under Windows, enabling
    slime to work again.

sbcl_1_0_11

changes in sbcl-1.0.11 relative to sbcl-1.0.10:
  * incompatible change: hash-table accessor functions are no longer
    automatically protected by locks. Concurrent accesses on the same hash-table
    from multiple threads can give inconsistent results or even corrupt the
    hash-table completely. Multi-threaded applications should do their own
    locking at the correct granularity. In the current implementation it is
    still safe to have multiple readers access the same table, but it's not
    guaranteed that this property will be maintained in future releases.
  * minor incompatible change: (SETF MUTEX-VALUE) is not longer supported,
    and will signal an error at runtime.
  * enhancement: SB-THREAD package now exports a semaphore interface.
  * enhancement: CONS can now stack-allocate on x86 and
    x86-64. (Earlier LIST and LIST* supported stack-allocation, but
    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.
  * optimization: RELEASE-MUTEX no longer needs to perform a syscall
    if the mutex is uncontested on Linux.
  * bug fix: symbol-macro expansion now uses the *MACROEXPAND-HOOK*
    as specified by the CLHS. (thanks to Tobias Rittweiler)
  * bug fix: NaN comparison now works on x86-64.
  * bug fix: CLOSE :ABORT T on a stream with pending output now
    works.
  * bug fix: instances of non-standard metaclasses using standard
    instance structure protocol sometimes missed the slot type checks
    in safe code.
  * bug fix: known functions can be inlined in high-debug code.

sbcl_1_0_10

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.
  * minor incompatible change: :UNIX is no longer present in *FEATURES*
    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,
    requiring O(1) instead of O(N) per weak pointer to identify
    scanvenged vs. unscavenged pointers. (thanks to Paul Khuong)
  * optimization: typechecking (SETF SLOT-VALUE) is now ~5x faster in
    method bodies using constant slot-names when the first argument is
    a specializer parameter for the method.
  * optimization: SLOT-VALUE &co are now ~50% faster for variable slot
    names, when the class of the instance is a direct instance
    STANDARD-CLASS or FUNCALLABLE-STANDARD-CLASS (making them only 3x
    as slow as the constant slot-name case.)
  * optimization: member type construction is now O(N) instead
    of O(N^2).
  * optimization: UNION and NUNION are now O(N+M) for large
    inputs as long as the :TEST function is one of EQ, EQL, EQUAL, or
    EQUALP.
  * enhancement: DEFINE-MODIFY-MACRO lambda-list information is
    now more readable in environments like Slime which display it.
    (thanks to Tobias C. Rittweiler)
  * bug fix: SB-EXT:COMPARE-AND-SWAP was non-atomic unless the compiler
    was able to infer the correct argument type for the object on which
    the CAS operation was being performed.
  * bug fix: copy propagation interfered with parallel assignment
    semantics in local calls. (reported by Paul Khuong)
  * bug fix: the signed modular fixnum shift compiled to wrong code on
    x86 and x86-64.  (spotted by a slight modification to some of
    PFD's random tests)

sbcl_1_0_9

changes in sbcl-1.0.9 relative to sbcl-1.0.8:
  * minor incompatible change: SB-SYS:OUTPUT-RAW-BYTES is deprecated.
  * enhancement: SB-EXT:FINALIZE accepts a :DONT-SAVE keyword argument,
    indicating the finalizer should be cancelled when SAVE-LISP-AND-DIE
    is called.
  * enhancement: default PRINT-OBJECT methods for classes, slot-definitions,
    and generic function now print the object identity for anonymous
    instances. (thanks to Attila Lendvai)
  * enhancement: as an extension to MOP, SBCL now supports SETF of
    STANDARD-INSTANCE-ACCESS and FUNCALLABLE-STANDARD-INSTANCE-ACCESS.
    (thanks to Attila Lendvai)
  * enhancement: sb-cover has an alternate annotation mode which puts
    the form annotations at the car of the form, instead of annotating
    it completely. The benefit of this mode is that it shows better
    which forms were instrumented by the compiler.
  * bug fix: new compiler transforms for MEMBER and ASSOC were affected
    by printer control variables. (reported by Dan Corkill)
  * bug fix: system leaked memory when delayed output was performed by
    the OS in smaller chunks then expected. (thanks to David Smith)
  * bug fix: system leaked memory when file streams were not closed
    properly.
  * bug fix: large objects written to slow streams that were modified
    after the write could end up with the modified state written to
    the underlying file descriptor.
  * bug fix: multiple threads operating in parallel on the same stream
    could cause buffer-overflows.
  * bug fix: source location information is stored correctly
    (broken since 1.0.6). This bug would generally show up as the
    Slime debugger highlighting the wrong form when the sldb-show-source
    command was used.
  * bug fix: Branch forms are again annotated as branches in the sb-cover
    annotations.
  * bug fix: GCD on MOST-NEGATIVE-FIXNUM no longer causes an infinite loop
    on x86-64. (reported by Gregory Vanuxem)
  * bug fix: EQUALP could return wrong results for structures with raw
    slots (slots with a :TYPE of SINGLE-FLOAT, DOUBLE-FLOAT, or a machine
    word). (reported by Vjacheslav Fyodorov)
  * bug fix: sb-sprof sampling didn't work on non-x86oid platforms. (patch
    by Pierre Mai)

sbcl_1_0_8

changes in sbcl-1.0.8 relative to sbcl-1.0.7:
  * enhancement: experimental macro SB-EXT:COMPARE-AND-SWAP provides
    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).
  * enhancement: closed over variables can be stack-allocated on x86
    and x86-64.
  * performance bug fix: GETHASH and (SETF GETHASH) are once again
    non-consing.
  * optimization: slot definition lookup is now O(1). This speeds up
    eg. SLOT-VALUE and (SETF SLOT-VALUE) with variable slot names.
  * optimization: STRING-TO-OCTETS is now up to 60% faster for UTF-8.
  * optimization: ASSOC and MEMBER can now be open-coded for all
    combinations of keyword arguments when second argument is constant
    and SPEED >= SPACE. In other cases a specialized version is
    selected.
  * bug fix: using obsoleted structure instances with TYPEP and
    generic functions now signals a sensible error.
  * bug fix: threads waiting on GET-FOREGROUND can be interrupted.
    (reported by Kristoffer Kvello)
  * bug fix: backtrace construction is now more careful when making
    lisp-objects from pointers on the stack, to avoid creating bogus
    objects that can be seen by the GC.
  * bug fix: defaulting of values in contexts expecting more than 7
    variables now works on x86-64.  (reported by Christopher Laux)
  * bug fix: modifications to packages (INTERN, EXPORT, etc) are now
    thread safe.
  * bug fix: (SETF SYMBOL-PLIST) no longer allows assigning a non-list
    as the property-list of a symbol.
  * bug fix: DEFMETHOD forms with CALL-NEXT-METHOD in the method body,
    in EVAL-WHEN forms with both :COMPILE-TOPLEVEL and :LOAD-TOPLEVEL
    situations requested, are once again file-compileable.  (reported
    by Sascha Wilde)

sbcl_1_0_7

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
    function SB-PCL:MAKE-METHOD-SPECIALIZERS-FORM, called as part of
    the expansion of DEFMETHOD, is responsible for generating a form
    which creates a list of specializers when evaluated.  Additional
    functions SB-PCL:[UN]PARSE-SPECIALIZER-USING-CLASS provide
    debugging and introspective support.
  * minor incompatible change: the (unsupported) spinlock interface
    has changed: free spinlock now has the value NIL, and a held spinlock
    has the owning thread as its value.
  * enhancement: WITHOUT-INTERRUPTS now binds ALLOW-WITH-INTERRUPTS and
    WITH-LOCAL-INTERRUPTS as local macros. Refer to documentation string
    for details.
  * enhancement: name of a socket-stream is now "a socket" instead of
    "a constant string".
  * enhancement: SB-POSIX now supports lockf(). (Thanks to Zach Beane.)
  * enhancement: SB-POSIX now supports getcwd(). (Thanks to Tassilo Horn.)
  * enhancement: SB-INTROSPECT:FUNCTION-ARGLIST shows nicer argument lists
    for generic functions. (Thanks to Tobias C. Rittweiler)
  * optimization: bignum printing speed has been improved by 20-40%
    (depending on the bignum size.)
  * bug fix: WITH-MUTEX and WITH-RECURSIVE-LOCK are now interrupt safe
    on Linux.
  * bug fix: the cache used by the CLOS to store precomputed effective
    methods, slot offsets, and constant return values is now thread and
    interrupt safe.
  * bug fix: generic function dispatch function updating is now thread
    and interrupt safe (in the sense that the known issues have been
    fixed.)
  * bug fix: ADD/REMOVE-METHOD is now thread and interrupt safe.
  * bug fix: interning EQL-specializers is now thread and interrupt safe.
  * bug fix: asdf systems with dependencies to the SB-POSIX or
    SB-BSD-SOCKETS contribs can be loaded with :FORCE T.
  * bug fix: interrupt safety of applicable method computation has been
    improved.

sbcl_1_0_6

changes in sbcl-1.0.6 relative to sbcl-1.0.5:
  * new contrib: sb-cover, an experimental code coverage tool, is included
    as a contrib module.
  * optimization: STRING-TO-OCTETS for unibyte encodings and UTF-8 is
    significantly faster.
  * optimization: calls of the form (AREF FOO (+ INDEX <constant>)) now
    produce more efficient code on x86-64 if the compiler can determine
    that (+ INDEX <constant>) does not require a bounds check and FOO
    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)
  * enhancement: stepping is now once again supported on the SPARC and
    MIPS platforms.  (It is also now more likely to work on CheneyGC
    builds on the PPC.)
  * enhancement: sb-sprof can now also track and report accurate call
    counts.
  * 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
  * bug fix: GETHASH, (SETF GETHASH), CLRHASH and REMHASH are now
    interrupt safe.
  * bug fix: GC race condition occasionally resulting in crashes with
    the error message "SIG_STOP_FOR_GC blocked at a bad place" has been
    fixed.
  * bug fix: &ENVIRONMENT variables in macro lambda lists can now be
    declared ignored.
  * bug fix: DEFSETF lambda lists without &ENVIRONMENT no longer cause
    a STYLE-WARNING to be signalled (regression from 1.0.4.)
  * bug fix: an asynchronous interrupt could previously leave the
    system running with GC inhibited.
  * bug fix: a DECLARE form evaluated at top-level now causes an error
    rather than silently (or verbosely) returning NIL.
  * bug fix: trying to dissassemble functions compiled at high DEBUG could
    result in a error being signalled due to source form lookup errors.
    (reported by Peter Graves)

sbcl_1_0_5

changes in sbcl-1.0.5 relative to sbcl-1.0.4:
  * incompatible change: removed writer methods for host-ent-name,
    host-ent-addresses -- changing the values did not update the DNS
    information anyway.
  * minor incompatible change: changed experimental JOIN-THREAD interface
  * documentation: the manual now lists reader and writer methods
    in class slot documentation sections. (thanks to Richard M Kreuter)
  * documentation: unwinding from asyncronous events has been
    documented as unsafe.
  * documentation: SB-SYS:WITHOUT-GCING has been documented as unsafe
    in multithreaded application code.
  * optimization: GET-INTERNAL-REAL-TIME has been optimized on POSIX
    platforms. (thanks to James Anderson for the optimization hint)
  * optimization: REPLACE, SUBSEQ, and COPY-SEQ are now optimized in
    more cases.
  * optimization: STRING-{EQUAL,LESSP,GREATER-P} and their NOT-
    variants no longer cons.
  * optimization: Direct calls to CHAR-{EQUAL,LESSP,GREATERP} and
    their NOT- variants no longer cons.
  * optimization: EQUAL hash tables no longer use SXHASH for objects
    of all data types, but instead use an EQL hash for types for which
    EQUAL is the same as EQL.
  * optimization: the non-inlined generic versions of AREF and (SETF AREF)
    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
    SB-SYS:INTERACTIVE-INTERRUPT to be signalled.
  * bug fix: FILE-POSITION used to signal an error in some cases where
    ANSI requires it to return NIL.
  * bug fix: ADJUST-ARRAY is now interrupt-safe.
  * bug fix: adding and removing fd-handlers is now interrupt-safe.
  * bug fix: inlined calls to C now ensure 16byte stack alignment on
    x86/Darwin.
  * bug fix: bad type declaration in the CLOS implementation has
    been fixed. (reported by James Anderson)
  * bug fix: incorrect ROOM reporting on x86-64 has been fixed.
    (thanks to Lutz Euler)
  * bug fix: DEFSETF now allows &ENVIRONMENT and disallows &AUX as
    required by the CLHS. (reported by Samium Gromoff)
  * bug fix: dead unbound variable references now signal an error.
    (reported by Marco Monteiro)
  * bug fix: / with an unused value was being deleted in safe code.
    (thanks to Marco Monteiro and Kevin Reid)
  * bug fix: number of characters that can be written onto a single
    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.
  * bug fix: some interrupt safety issues with GETHASH, (SETF
    GETHASH), CLRHASH and REMHASH have been fixed.
  * bug fix: binding *BREAK-ON-SIGNALS* to a value that is not a type
    specifier no longer causes infinite recursion.
  * bug fix: SB-EXT:MUFFLE-CONDITIONS declarations no longer trigger a
    bogus warning in DEFMETHOD bodies. (reported by Kevin Reid)
  * bug fix: an &environment argument with the correct variable information
    is passed to macros that are expanded during byte compilation.
    (reported by Samium Gromoff)
  * bug fix: a logic error was causing the hash function for bignums to
    have excessive amounts of collisions. (reported by Faré Rideau)
  * bug fix: modifying the contents of an array could change the return
    value of SXHASH on that array, which is only allowed for strings
    and bit vectors. (bug introduced in 0.9.16)
  * improvement: the x86-64/darwin port now passes all tests (except
    for the debugger tests) but should still be considered
    experimental until this is fixed.
  * improvement: a style-warning is signaled for CASE (etc) clauses with
    duplicate keys. (thanks to Kevin Reid)
  * improvement: macos/x86 and macos/x86-64 now use mach exception
    handlers for dealing with illegal instructions (for trapping and
    error handling) and memory protection violations (for GC).

sbcl_1_0_4

changes in sbcl-1.0.4 relative to sbcl-1.0.3:
  * new platform: experimental support for x86-64/darwin (MacOS).
  * incompatible change: the thread-safe (on most platforms) getaddrinfo
    and getnameinfo sockets functions are used instead of gethostbyaddr
    and gethostbyname, on platforms where the newer functions are available.
    As a result, the ALIASES field of HOST-ENT will always be NIL on these
    platforms.
  * change: runtimes with embedded cores (i.e. saved with :EXECUTABLE T)
    don't print the startup banner, but behave as if --noinform was passed
    as a command line argument. (thanks to Kevin Reid)
  * new experimental feature: added JOIN-THREAD (by NIIMI Satoshi)
  * optimization: code using alien values with undeclared types is much faster.
  * optimization: the compiler is now able to open code SEARCH in more cases.
  * optimization: more compact typechecks on x86-64 (thanks to Lutz Euler)
  * bug fix: using standardized COMMON-LISP special variables as loop
    variables no longer signals bogus package lock violations. (reported
    by Eric Marsden)
  * bug fix: declaring local loop variables to be of a range-limited type
    such as (SINGLE-FLOAT 1.0 2.0) no longer causes a compile-time error.
    (reported by Andras Simon)
  * bug fix: >= and <= gave wrong results when used with NaNs. (Some NaN
    bugs remain on x86-64.)
  * bug fix: the #= and ## reader macros now interact reasonably with
    funcallable instances.
  * bug fix: type-checks for function arguments were compiled using the
    compiler policy settings of the wrong lexical environment (in 1.0.2
    and 1.0.3).
  * bug fix: SHADOW accepts characters as string designators, as required
    by the spec (thanks to Eric Marsden)
  * bug fix: fixed GC safety issues when foreign functions are called with
    non-base strings as arguments
  * bug fix: more consistent error output for fatal-compiler-warnings, like
    reader errors
  * bug fix: functions with proper names were showing up as NIL in
    backtraces (reported by Edi Weitz, regression in 1.0.2)

sbcl_1_0_3

changes in sbcl-1.0.3 relative to sbcl-1.0.2:
  * new platform: NetBSD/PPC.  (thanks to Aymeric Vincent)
  * optimization: calls of the form (AREF FOO (+ INDEX <constant>)) now
    produce more efficient code on the x86 if the compiler can determine
    that (+ INDEX <constant>) does not require a bounds check and FOO
    has an element type at least 8 bits wide.
  * bug fix: references to undefined variables are handled the same way
    in toplevel forms as in the normal compiler
  * bug fix: the build scripts again work with non-bash /bin/sh (thanks
    to Magnus Henoch)
  * bug fix: use "gtar" as the asdf-install *TAR-PROGRAM* on NetBSD
    (thanks to Jon Buller)
  * improvement: faster compilation times for complex functions
  * improvement: added readlink support to SB-POSIX (thanks to Richard
    M Kreuter)

sbcl_1_0_2

changes in sbcl-1.0.2 relative to sbcl-1.0.1:
  * improvement: experimental support for mach exception handling on
    x86/macos. requires building with :MACH-EXCEPTION-HANDLER feature
    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
  * new feature: new generic function SB-GRAY:STREAM-FILE-POSITION can
    be used to provide an implementation for FILE-POSITION on Gray streams
    (thanks to Eric Marsden)
  * new feature: add syslog, openlog and closelog support to SB-POSIX
    (thanks to Richard Kreuter)
  * optimization: the function call overhead in code compiled with
    a high DEBUG optimization setting is significantly
  * bug fix: an error is signaled for attempts to use READ-SEQUENCE
    for a (SIGNED-BYTE 8) stream and (UNSIGNED-BYTE 8) vector, or vice versa.
    (thanks to Tony Martinez)
  * bug fix: the initforms for DEFMETHOD &AUX parameters are only
    evaluated once (reported by Kevin Reid)
  * bug fix: the :SHOW-PROGRESS keyword parameter to SB-SPROF:WITH-PROFILING
    works again (thanks to Kilian Sprotte)
  * bug fix: an error is signaled for tagbodies with duplicate tags
    (thanks to Stephen Wilson)
  * bug fix: NIL can be used as a tagbody tag (thanks to Stephen Wilson)
  * bug fix: Win32 port can now handle foreign code unwinding Lisp
    stack frames from alien callbacks.
  * bug fix: ATANH returned incorrect results on win32 (thanks to Pierre Mai)
  * bug fix: SBCL works on Linux/ppc systems with a kernel configured to use
    65k pages (thanks to David Woodhouse)
  * bug fix: fix SB-POSIX dirent and socket on NetBSD (thanks to Richard Kreuter)

sbcl_0_9_18

changes in sbcl-0.9.18 (1.0.beta?) relative to sbcl-0.9.17:
  * enhancement: SB-POSIX now supports cfsetispeed(3), cfsetospeed(3),
    cfgetispeed(3), cfgetospeed(3), and related constants. (thanks to
    Max-Gerd Retzlaff)
  * bug fix: two potential GC deadlocks affecting threaded builds.
  * bug fix: (TYPEP #\A '(NOT (MEMBER #\" #\{ #\:))) now correctly
    returns T (reported by Anton Kazennikov)
  * bug fix: the STORE-VALUE restart of CHECK-TYPE works correctly
    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.
  * bug fix: corruption of specials when unbinding is interrupted by an
    asynchronous unwind (reported by Hannu Koivisto)
  * improvement: the debugger will now also display local variables that
    are only used once, for code compiled with a DEBUG optimization quality
    of 2 or higher.

sbcl_0_9_17

changes in sbcl-0.9.17 (0.9.99?) relative to sbcl-0.9.16:
  * feature: weak hash tables, see MAKE-HASH-TABLE documentation
  * incompatible change: External-format support for FFI calls.  The
    SB-ALIEN:C-STRING no longer implies an ASCII
    external-format. Instead the string is subject to external-format
    conversion. Additionally return values of type SB-ALIEN:C-STRING
    are by default of type (SIMPLE-ARRAY CHARACTER), not
    SIMPLE-BASE-STRING. For an alien type that behaves like the old
    SB-ALIEN:C-STRING type, use (SB-ALIEN:C-STRING :EXTERNAL-FORMAT
    :ASCII :ELEMENT-TYPE BASE-CHAR).  (thanks to Yaroslav Kavenchuk)
  * incompatible change: SB-EXT package no longer contains the
    following unused symbols: *GC-NOTIFY-AFTER*, *GC-NOTIFY-BEFORE*,
    *GC-NOTIFY-STREAM*, *ERROR-PRINT-LENGTH*, *ERROR-PRINT-LEVEL*,
    *ERROR-PRINT-LINES*
  * incompatible change: the single-stepper is no longer available
    on Alpha, Mips and Sparc platforms.
  * minor incompatible change: the direct superclasses of
    SB-MOP:FUNCALLABLE-STANDARD-OBJECT are (FUNCTION STANDARD-OBJECT),
    not (STANDARD-OBJECT FUNCTION).  This makes the
    class-precedence-lists of GENERIC-FUNCTION and
    STANDARD-GENERIC-FUNCTION comply with the requirement of ANSI
    1.4.4.5.
  * minor incompatible change: the default stream external format on
    non-unicode SBCL is no longer detected from the locale, but is always
    ISO-8859-1
  * new feature: Add a version of evaluator that uses an interpreter instead
    of the compiler. EVAL still uses the compiler by default, to switch it
    to use the interpreter, set the value of the variable
    SB-EXT:*EVALUATOR-MODE* to :INTERPRET.
  * minor incompatible change: the single-stepper REPL has been merged
    with the normal debugger (see the "Stepping" heading of the debugger help
    for more details). The debugger command STEP will no longer switch
    to the single-stepper REPL.
  * bug fix: ENOUGH-NAMESTRING on pathnames with no name and a pattern
    for a type now works.
  * bug fix: loading of default sysinit file works. (thanks to Leonid
    Slobodov)
  * bug fix: better detection of circularities in the file-compiler.
    (reported by Marco Monteiro)
  * bug fix: the CL pathname functions now work with files that have
    non-ASCII characters in their names (thanks to Yaroslav Kavenchuk)
  * bug fix: The :PTY argument for RUN-PROGRAM will now work on
    systems with Unix98 pty semantics.
  * bug fix: ASDF-INSTALL will now work with bsd tar.
  * bug fix: ASDF-INSTALL uses GNU tar on Solaris (thanks to Josip
    Gracin).
  * bug fix: timers expiring in dead threads no longer cause a
    type-error (reported by Paul "Nonny Mouse").
  * bug fix: thanks to more lightweight single-stepper instrumentation,
    code compiled with (DEBUG 3) will compile and execute significantly faster,
    and will have more accurate type-inferencing than before
  * bug fix: SLOT-VALUE optimizations are no longer done on method parameters
    whose bindings are modified
  * improvements to the win32 port (thanks to Yaroslav Kavenchuk):
    ** bug fix: arguments to RUN-PROGRAM are escaped correctly
    ** replace dummy implementations of CL:MACHINE-INSTANCE and
       CL:SOFTWARE-VERSION with proper version