obscure ANSI requirements
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
+ rebinding *DEBUGGER-HOOK*. The main difference is that BREAK
+ 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
+ because *DEBUG-IO* is also messed up in --disable-debugger mode;
+ while under the new system, BREAK in --disable-debugger mode
+ terminates the system just as an unhandled error would.
* fixed compiler performance when processing loops with a step >1;
* bug fix: DOCUMENTATION now retrieves generic function
documentation. Also, DOCUMENTATION and (SETF DOCUMENTATION)
* fixed bug 285: TRUNCATE on bignum arguments, and indeed bignum
arithmetic in general, is now much more reliable on the PPC
platform.
+ * bug fix: LOGCOUNT on (UNSIGNED-BYTE 64) objects on the Alpha
+ platform now returns the right answer.
* optimization: restored some effective method precomputation in
CLOS (turned off by an ANSI fix in sbcl-0.8.3); the amount of
precomputation is now tunable.
performance of the compiler by about 20%.
* optimization: performance of FILL (and :INITIAL-ELEMENT) on
simple-base-strings and simple-bit-vectors is improved.
+ * 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
+ implementation of the same facility, but for 64-bit arithmetic,
+ has been added for the alpha.
* microoptimization: the compiler is better able to make use of the
x86 LEA instruction for multiplication by constants.
* bug fix: in some situations compiler did not report usage of
generic arithmetic in (SPEED 3) policy.
* bug 145b fix: compiler used wrong type specifier while converting
MEMBER-types to numeric.
+ * bug fix: COMPILE-FILE must bind *READTABLE*. (reported by Doug
+ McNaught)
+ * bug fix: (SETF AREF) on byte-sized-element arrays with constant
+ index argument now works properly on the Alpha platform.
+ * bug fix: floating point exception treatment on the Alpha platform
+ is improved.
+ * bug fix: FILE-POSITION works much better on string input and
+ output streams. (thanks to Nikodemus Siivola)
+ * bug fix: many threading/garbage collection symptoms sorted.
+ SB-THREAD:INTERRUPT-THREAD now safe to call on a thread that
+ might be pseudo-atomic.
+ * internal change: Stopping for GC is now done with signals not
+ ptrace. GC is now done in whichever thread wanted it, instead of
+ in the parent.
+ * bug fix: GC hooks (missing since 0.8) reinstated, so finalizers
+ work again.
+ * bug fix: result form in DO is not contained in the implicit
+ TAGBODY.
+ * incompatible change: ICR structure is changed; the value part of
+ CONTINUATION is now called LVAR; corresponding functions are
+ renamed (e.g. SB-C::CONTINUATION-TYPE has become SB-C::LVAR-TYPE).
+ * added type deriver for ISQRT (thanks to Robert E. Brown).
+ * bug fix: better support for loading from the command line when an
+ initialization file sets (READTABLE-CASE *READTABLE*). (thanks
+ to Adam Warner)
* fixed some bugs revealed by Paul Dietz' test suite:
** the RETURN clause in LOOP is now equivalent to DO (RETURN ...).
** ROUND and FROUND now give the right answer when given very
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.
+ * porting: The system now builds on SuSE AMD64, although it still
+ 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-0.8.5 relative to sbcl-0.8.4:
+ * New code in contrib/sb-introspect (still probably not entirely
+ stable yet) provides some support for smart Lisp development
+ environments like SLIME.
+ * The conditions signalled for errors occurring when loading .fasl
+ files have been systematized (inheriting from SB-EXT:INVALID-FASL)
+ in a way which should help ASDF recover gracefully.
+ * The REQUIRE/PROVIDE behavior of *MODULE-PROVIDER-FUNCTIONS*
+ stuff has been cleaned up. If you code contrib/ stuff, this might
+ affect you, and you can look at contrib/README, contrib/STANDARDS,
+ and/or the 0.8.4.27 diff to check.
+ * In full calls the compiler now does not generate checks for declared
+ 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
+ failures (deadlock, spinning...) in GC-intensive multithreaded
+ applications.
+ * fixed PPC build problem (source code incompatibility of different
+ library versions): added offsetof() hackery which attempts to divine
+ where glibc maintainers put uc_mcontext today
+ * fixed bug 282: compiler does not trust type assertions while passing
+ arguments to a full call.
+ * fixed bug 261: compiler allows NIL or "no value" to be accepted for
+ &OPTIONAL VALUES type parameter.
+ * fix bug 214: algorithm for noting rejected templates is now more
+ similar to that of template seletion. (also reported by rydis on
+ #lisp)
+ * fixed bug 141b: printing backquoted information readably and prettily
+ inserts a space where necessary.
+ * bug fix: obviously wrong type specifiers such as (FIXNUM 1) or
+ (CHARACTER 10) are now reported as errors, rather than propagated
+ as unknown types. (reported by piso on #lisp)
+ * bug fix: the :IF-EXISTS argument to OPEN now behaves correctly
+ with values NIL and :ERROR. (thanks to Milan Zamazal)
+ * fixed bug 191c: CLOS now does proper keyword argument checking as
+ described in CLHS 7.6.5 and 7.6.5.1.
+ * bug fix: LOOP forms using NIL as a for-as-arithmetic counter no
+ longer raise an error; further, using a list as a for-as-arithmetic
+ 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.
+ * fixed bug 46k: READ-BYTE now signals an error when asked to read from
+ a STRING-INPUT-STREAM.
+ * compiler enhancement: SIGNUM is now better able to derive the type
+ of its result.
+ * type declarations inside WITH-SLOTS are checked. (reported by
+ 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 in let-convertion during flushing dead code.
+ ** compiler failure while deriving type of TRUNCATE on an
+ interval, containing 0.
+ ** ASH of a negative bignum by a negative bignum count now returns
+ -1, not 0.
+ ** intersection of CONS types now canonicalizes properly, fixing
+ inconsistencies in SUBTYPEP.
+
+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
+ host and target lisps. (noted by Paul Dietz' test suite on an
+ SBCL binary built from CLISP)
+ * The system can now be dynamically linked on the MIPS platform,
+ 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.
+ * fixed a compiler bug: MV-LET convertion did not check references
+ to the "max args" entry point. (reported by Brian Downing)
+ * tweaked disassembly notes to be less confident about proclaiming
+ some instruction as an LRA. (thanks to Brian Downing)
+ * contrib update: SB-ACLREPL is now threadsafe; multiple listeners
+ 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
+ ** Implementation of ASH-MOD32 on X86 and PPC did not work for the
+ shift greater than 32.
+ ** FLUSH-DEST did not mark blocks for type check regeneration.
+ ** HANDLER-CASE failed to accept declarations in handler clauses
+ in some circumstances.
+
+changes in sbcl-0.8.7 relative to sbcl-0.8.6:
+ * When built with the :SB-FUTEX feature, threaded builds now take
+ advantage of the "fast userspace mutex" facility in Linux kernel 2.6
+ 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.
+ * bug fix: GET-SETF-EXPANSION no longer throws an internal type
+ error when called without an explicit environment argument.
+ (thanks to Nikodemus Siivola)
+ * bug fix: buffered :DIRECTION :IO streams are less likely to become
+ confused about their position. (thanks to Adam Warner and Gerd
+ Moellmann)
+ * 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)
+ * ASDF-INSTALL bug fix: now parses *PROXY* properly. (thanks to
+ Sean Ross)
+ * SB-SIMPLE-STREAMS enhancement: simple-streams can now be used as
+ streams for the REPL, for the debugger, and so on. (thanks to
+ David Licteblau)
+ * DEFINE-CODITION is more efficient. (thanks to Brian Mastenbrook)
+ * fixed some bugs revealed by Paul Dietz' test suite:
+ ** the value of the :REHASH-THRESHOLD argument to MAKE-HASH-TABLE
+ is ignored if it is too small, rather than propagating through
+ to cause DIVIDE-BY-ZERO or FLOATING-POINT-OVERFLOW errors.
+ ** extremely complex negations of CONS types were not being
+ sufficiently canonicalized, leading to inconsistencies in
+ SUBTYPEP.
+ ** VALUES tranformer lost derived type.
+
+changes in sbcl-0.8.8 relative to sbcl-0.8.7:
+ * minor incompatible change: parsing of namestrings on a physical
+ (Unix) host has changed; numbers after the final #\. in a
+ namestring are no longer interpreted as a version field. This is
+ intented to be largely invisible to the user, except that the
+ meaning of the namestring "*.*.*" has changed: it now refers to a
+ pathname with :TYPE :WILD :NAME #<pattern "*.*">. This namestring
+ should usually be replaced by
+ (make-pathname :name :wild :type :wild :version :wild)
+ with the added benefit that this is more likely to be portable.
+ As a consequence of this change, the :IF-EXISTS :NEW-VERSION
+ option to OPEN now signals an error if the file being opened
+ exists; this may have an impact on existing code.
+ * bug fix: DECODE-UNIVERSAL-TIME now accepts timezone arguments with
+ second-resolution: integer multiples of 1/3600 between -24 and 24.
+ (thanks to Vincent Arkesteijn)
+ * bug fix: functions =, /=, <, <=, >, >= did not check the argument
+ type when called with 1 argument; PEEK-CHAR checked type of
+ 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.
+ * bug fix: arrays specialized on (UNSIGNED-BYTE 15) are now
+ recognized as being TYPEP their class.
+ * bug fix: the PUSHNEW documentation string has been corrected.
+ (thanks to Vincent Arkesteijn)
+ * optimization: implemented multiplication as a modular
+ (UNSIGNED-BYTE 32) operation on the x86 backend.
+ * optimization: SEARCH on simple-base-strings can now be open-coded.
+ (see also contrib/compiler-extras.lisp for inspiration for
+ teaching the compiler about the Boyer-Moore algorithm).
+ * value, returned by MAX (and MIN) called with several EQUALP, but
+ 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.
+ ** pathwise CAST removing failed when the CAST node did not start
+ a block.
+ ** INPUT-STREAM-P, OUTPUT-STREAM-P, STREAM-ELEMENT-TYPE and
+ OPEN-STREAM-P signal a TYPE-ERROR if their argument is not a
+ stream.
+ ** LOAD-LOGICAL-PATHNAME-TRANSLATIONS returns NIL if the logical
+ host is already defined.
+ ** RENAME-FILE works on streams instead of signalling an internal
+ type error.
+ ** PEEK-CHAR uses the current readtable when determining whether
+ or not a character is whitespace.
+ ** MERGE-PATHNAMES handles the case when the pathname does not
+ specify a name while the default-pathname specifies a version.
+ ** Pathnames now stand a better chance of respecting print/read
+ consistency.
+ ** Attempting to use standardized file system operators with a
+ pathname with invalid :DIRECTORY components signals a
+ FILE-ERROR.
+ ** OPEN :DIRECTION :IO no longer fails to work on non-existent
+ files.
+ ** DIRECTORY on logical pathnames is more correct.
+ ** CLEAR-INPUT, CLEAR-OUTPUT, FINISH-OUTPUT and FORCE-OUTPUT
+ signal a TYPE-ERROR if their argument is not a stream.
+ ** READ-BYTE and WRITE-BYTE signal a TYPE-ERROR if their stream
+ designator argument does not designate a stream.
+ ** OPEN-STREAM-P and INPUT-STREAM-P on synonym streams work by
+ examining the synonym.
+ ** STREAM-ELEMENT-TYPE and FRESH-LINE on broadcast-streams now
+ work as specified.
+ ** OPEN and WITH-OPEN-STREAM allow opening streams with
+ element-type larger than ([UN]SIGNED-BYTE 32).
planned incompatible changes in 0.8.x:
* (not done yet, but planned:) When the profiling interface settles