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sbcl.sbcl/NEWS
Christophe Rhodes a0d9e7847b 0.8.6.39: 
Quiet.  Too quiet.  Fix bug in pprinting backquotes, introduced
	*sigh* when fixing the last bug...
	... we need to print once to a string stream, to look at the
		first character to make sure that it's not a @ or a .
	... and then we need to print again, but this time to the real
		stream (which is at a different logical block position)
	... yes, possibly there is a better way.

	Also put identity where mouth is: add self to SUPPORT
2003-12-16 17:40:39 +00:00

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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
* added doc/FOR-CMUCL-DEVELOPERS
* many many small tweaks to output format, e.g. removing possibly-confusing
trailing #\. character in DESCRIBE-INSTANCE
* (EQUALP #\A 'A) no longer signals an error.
* new hashing code, including EQUALP hashing
* tidied up Lisp initialization and toplevel
* initialization files (e.g. /etc/sbclrc and $HOME/.sbclrc)
* command line argument processing
* added POSIX-GETENV function to deal with Unix-ish environment variables
* more-Unixy handling of *STANDARD-INPUT* and other Lisp streams, e.g.
terminating SBCL on EOF
* non-verbose GC by default
* There is no more "sbcl" shell script; the sbcl file is now the C
runtime executable (just like CMU CL).
* removed some unused fops, e.g. FOP-UNIFORM-VECTOR, FOP-CHARACTER, and
FOP-POP-FOR-EFFECT
* tweaked debug-info.lisp and debug-int.lisp to make the debugger store
symbol and package information as Lisp native symbol and package objects
instead of strings naming symbols and strings naming packages. This way,
whenever packages are renamed (as in warm init), debug information is
transformed along with everything else.
* tweaked the optimization policy declarations which control the building
of SBCL itself. Now, among other things, the system no longer saves
source location debugging information. (This helps two problems at once
by reducing SBCL size and by keeping SBCL from trying to look for its
sources -- which may not exist -- when reporting errors.)
* added src/cold/chill.lisp, to let SBCL read its own cold sources for
debugging and testing purposes
* cleaned up printing, making the printer call PRINT-OBJECT for
instances, and using PRINT-UNREADABLE-OBJECT for most PRINT-OBJECT
methods, giving nearly-ANSI behavior
* converted almost all special variables to use *FOO* naming convention
* deleted PARSE-TIME functionality, since it can be done portably
* moved some files out of cold init into warm init
* deleted DEFUN UNDEFINED-VALUE, replaced (UNDEFINED-VALUE) forms
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
itself into the GC of the cross-compilation host. Now the system
builds nicely on my old laptop.
* added :SB-ALLOC in target-features.lisp-expr
* deleted mention of :ANSI-DOC from target-features.lisp-expr (since it
was not implemented)
* re-did condition handling and note reporting in the compiler. Notes
are no longer handled by signalling conditions. Style warnings
and warnings are handled more correctly and reported in such a way
that it's easy to find one or the other in your output (so that you
can e.g. figure out which of many problems caused COMPILE-FILE to
return FAILURE-P).
* changed the severity of several compiler warnings from full WARNING
to STYLE-WARNING in order to conform with the ANSI spec; also changed
compiler note reporting so that it doesn't use the condition system
at all (and hence affects neither FAILURE-P nor WARNINGS-P in the
COMPILE-FILE command)
* made PROCLAIM and DECLAIM conform to ANSI. PROCLAIM is now an ordinary
function. As a consequence, START-BLOCK and END-BLOCK declarations are
no longer supported, since their implementation was deeply intertwingled
with the magical, non-ANSI treatment that PROCLAIM received in CMU CL.
* removed bogus "support" for compiler macros named (SETF FOO), and
removed the compiler macro for SETF INFO (but only after making a fool
of myself on the cmucl-imp mailing list by posting a bogus patch for
DEFINE-COMPILER-MACRO..)
* Compiled files containing forms which have side effects on the Lisp
reader (such as DEFPACKAGE forms) are now handled more correctly.
(Compiler queuing of top level lambdas has been suppressed by setting
*TOP-LEVEL-LAMBDA-MAX* to 0. )
* deleted various currently-unused source files, e.g. gengc.lisp. They
may be added back at some point e.g. when porting to other architectures,
but until they are it's distracting to distribute them and to try to
maintain them.
* deleted "UNCROSS couldn't recurse through.." style warnings, since
there were so many of them they're just distractions, and UNCROSS is
known to be able to handle the current sources
* moved PROFILE functionality into TRACE, so that it will be clear
how the wrapping and unwrapping of functions when you profile them
interacts with the wrapping and unwrapping of functions when you
trace them. (Actually, the functionality isn't there yet, but at least
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
* tweaked verbose GC output so that it looks more like the progress
output that ANSI specifies for functions like LOAD
* set up the system on sourceforge.com, with home pages, mailing lists, etc.
* added <http://sbcl.sourceforge.com> to the banner information printed by
the sbcl executable
changes in sbcl-0.6.1 relative to sbcl-0.6.0:
* changed build optimization from (SAFETY 1) to (SAFETY 3) as a short-term
fix for various type-unsafety bugs, e.g. failures with (LENGTH 123) and
(MAKE-LIST -1). In the longer term, it ought to become true
that declarations are assertions even at SAFETY 1. For now, it's not
quite true even at SAFETY 3, but it's at least more nearly true..
(Note that this change seems to increases the size of the system by
O(5%) and to decrease the speed of the compiler by 20% or more.)
* changed ALIEN printing to be much more abbreviated, as a short-term fix
for the problem of printing dozens of lines of distracting information
about low-level system machinery as part of the top stack frame
on entry to the debugger when an undefined function was called.
* tweaked the debugger's use of WITH-STANDARD-IO-SYNTAX so that *PACKAGE*
is not reset to COMMON-LISP-USER.
* Compilation of stuff related to dyncount.lisp has been made conditional
on the :SB-DYNCOUNT target feature, so that the ordinary core system is
smaller. The various dyncount-related symbols have been moved into
a new "SB-DYNCOUNT" package.
* tty-inspect.lisp has been renamed to inspect.lisp.
* unix-glibc2.lisp has been renamed to unix.lisp, and the :GLIBC2
feature has gone away. (When we eventually port to other flavors of
libc and/or Unix, we'll try to make the differences between flavors
invisible at the user level.)
* Various other *FEATURES* tags, and/or their associated conditionals,
have been removed if obsolescent, or given better documentation, or
sometimes given more-mnemonic names.
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
compatibility. That is, fasl files compiled under sbcl-0.6.1 may
not run under sbcl-0.6.2. Once we get out of alpha releases,
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
and sbcl-1.4.4. Until then, however, it might be fairly common
for maintenance releases to break binary compatibility.)
* A bug in the calculation of WARNINGS-P and FAILURE-P in COMPILE-FILE
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
warnings for compiled-but-not-yet-loaded generic functions.
* The CLTL-style "LISP" and "USER" nicknames for the "COMMON-LISP"
and "COMMON-LISP-USER" packages have been removed. Now only the "CL"
and "CL-USER" standard nicknames from the "11.1.2 Standardized Packages"
section of the ANSI spec are supported.
* The "" nickname for the "KEYWORD" package has been removed.
The reader still handles symbol tokens which begin with a package marker
as keywords, but it doesn't expose its mechanism for doing so in the
(PACKAGE-NICKNAMES (FIND-PACKAGE "KEYWORD")) list.
* The system now issues STYLE-WARNINGs for contradictory TYPE
proclamations. (Warnings for contradictory FTYPE proclamations would
be nice too, but those can't be done usefully unless the type system
is made smarter about FUNCTION types.)
* The names of source files "*host-*.lisp" and "*target-*.lisp" have been
systematized, so that "*target-*.lisp is supposed to exist only on the
target and imply that there's a related file which exists on the
host, and *host-*.lisp is supposed to exist only on the host and imply
that there's a related file which exists on the target. This involves a
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
** late-target-type.lisp -> deftypes-for-target.lisp
Furthermore, several other previously target-only files foo.lisp (e.g.
hash-table.lisp and random.lisp) have been split into a target-and-host
foo.lisp file and a target-only target-foo.lisp file, with their key type
definitions in the target-and-host part, so that the cross-compiler will
know more about target types.
* DEFSTRUCT BACKEND, and the BACKEND-valued *BACKEND* variable, have
gone away. In their place are various *BACKEND-FOO* variables
corresponding to the slots of the old structure.
* A bug which caused the SB-COLD bootstrap-time package to be propagated
into the target SBCL has been fixed.
* The chill.lisp system for loading cold code into a running SBCL
now works better.
* Support for the CMU CL "scavenger hook" extension has been removed.
(It was undocumented and unused in the CMU CL sources that SBCL was
derived from, and stale in sbcl-0.6.1.)
* Various errors in the cross-compiler type system were detected
by running the cross-compiler with *TYPE-SYSTEM-INITIALIZED*
(enabling various consistency checks). Many of them were fixed,
but some hard problems remain, so the compiler is back to
running without *TYPE-SYSTEM-INITIALIZED* for now.
* As part of the cross-compiler type system cleanup, I implemented
DEF!TYPE and got rid of early-ugly-duplicates.lisp.
* I have started adding UNCROSS calls throughout the type system
and the INFO database. (Thus perhaps eventually the blanket UNCROSS
on cross-compiler input files will be able to go away, and various
kludges with it).
* CONSTANTP now returns true for quoted forms (as explicitly required
by the ANSI spec).
changes in sbcl-0.6.3 relative to sbcl-0.6.2:
* The system still can't cross-compile itself with
*TYPE-SYSTEM-INITIALIZED* (and all the consistency checks that
entails), but at least it can compile more of itself that way
than it used to be able to, and various buglets which were uncovered
by trying to cross-compile itself that way have now been fixed.
* This release breaks binary compatibility again. This time
at least I've incremented the FASL file format version to 2, so that the
problem can be detected reliably instead of just causing weird errors.
* various new style warnings:
** using DEFUN, DEFMETHOD, or DEFGENERIC to overwrite an old definition
** using the deprecated EVAL/LOAD/COMPILE situation names in EVAL-WHEN
** using the lexical binding of a variable named in the *FOO* style
* DESCRIBE has been substantially rewritten. It now calls DESCRIBE-OBJECT
as specified by ANSI.
* *RANDOM-STATE* is no longer automatically initialized from
(GET-UNIVERSAL-TIME), but instead from a constant seed. Thus, the
default behavior of the system is to repeat its behavior every time
it's run. If you'd like to change this behavior, you can always
explicitly set the seed from (GET-UNIVERSAL-TIME); whereas under the
old convention there was no comparably easy way to get the system to
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
interpretation as TYPE FUNCTION declarations. (See p. 228 of CLTL2.)
* The quantifiers SOME, EVERY, NOTANY, and NOTEVERY no longer cons when
the types of their sequence arguments can be determined at compile time.
This is done through a new open code expansion for MAP which eliminates
consing for (MAP NIL ..), and reduces consing otherwise, when sequence
argument types can be determined at compile time.
* The optimizer now transforms COERCE into an identity operation when it
can prove that the coerced object is already of the correct type. (This
can be a win for machine generated code, including the output of other
optimization transforms, such as the MAP transform above.)
* Credit information has been moved from source file headers into CREDITS.
* Source file headers have been made more standard.
* The CASE macro now compiles without complaining even when it has
no clauses.
changes in sbcl-0.6.4 relative to sbcl-0.6.3:
* There is now a partial SBCL user manual (with some new text and some
text cribbed from the CMU CL manual).
* The beginnings of a profiler have been added (starting with the
CMU CL profiler and simplifying and cleaning up). Eventually the
main interface should be through the TRACE macro, but for now,
it's still accessed through vaguely CMU-CL-style functions and macros
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:
** DISASSEMBLE now works. (There was a problem in using DEFMACRO
instead of SB!XC:DEFMACRO, compounded by an oversight on my
part when getting rid of the compiler *BACKEND* stuff.)
** The value of *NULL-TYPE* was screwed up, because it was
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
of places. (I found it because I wanted to understand why
GET-INTERNAL-RUN-TIME was consing.)
* fixed a bug in DEFGENERIC which was causing it to overwrite preexisting
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.
* added declarations so that SB-PCL::USE-CACHING-DFUN-P
can use the new (as of 0.6.3) transform for SOME into MAP into
inline code
* changed (MOD 1000000) type declarations for Linux timeval.tv_usec slot
values to (INTEGER 0 1000000), so that the time code will no longer
occasionally get blown up by Linux returning 1000000 microseconds
* PRINT-UNREADABLE-OBJECT has been tweaked to make the spacing of
its output conform to the ANSI spec. (Alas, this makes its output
uglier in the :TYPE T :IDENTITY NIL case, but them's the breaks.)
* A full call to MAP NIL with a single sequence argument no longer conses.
* 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.
* added a modified version of Raymond Toy's recent CMU CL patch for
EQUALP comparison of HASH-TABLE
changes in sbcl-0.6.5 relative to sbcl-0.6.4:
* Raymond Wiker's patches to port the system to FreeBSD have been merged.
* The build process now looks for GNU make under the default name "gmake",
instead of "make" as it used to. If GNU make is not available as "gmake"
on your system, you can change this default behavior by setting the
GNUMAKE environment variable.
* Replace #+SB-DOC with #!+SB-DOC in seq.lisp so that the system
can build without error under CMU CL.
changes in sbcl-0.6.6 relative to sbcl-0.6.5:
* DESCRIBE no longer tries to call itself recursively to describe
bound/fbound values, so that it no longer fails on symbols which are
bound to themselves (like keywords, T, and NIL).
* DESCRIBE now works on generic functions.
* The printer now prints less-screwed-up representations of closures
(not naively trying to bogusly use the %FUNCTION-NAME accessor on them).
* A private symbol is used instead of the :EMPTY keyword previously
used to mark empty slots in hash tables. Thus
(DEFVAR *HT* (MAKE-HASH-TABLE))
(SETF (GETHASH :EMPTY *HT*) :EMPTY)
(MAPHASH (LAMBDA (K V) (FORMAT T "~&~S ~S~%" K V)))
now does what ANSI says that it should. (You can still get
similar noncompliant behavior if bang on the hash table
implementation with all the symbols you get back from
DO-ALL-SYMBOLS, but at least that's a little harder to do.)
This breaks binary compatibility, since tests for equality to
:EMPTY are wired into things like the macroexpansion of
WITH-HASH-TABLE-ITERATOR in FASL files produced by earlier
implementations.
* There's now a minimal placeholder implementation for CL:STEP,
as required by ANSI.
* An obscure bug in the interaction of the normal compiler, the byte
compiler, inlining, and structure predicates has been patched
by setting the flags for the DEFTRANSFORM of %INSTANCE-TYPEP as
:WHEN :BOTH (as per Raymond Toy's suggestion on the cmucl-imp@cons.org
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
stack when you type "FRAME 0" to explicitly instruct it to go to
the top of the stack. And it now prints the frame you request even
if it's the current frame (instead of saying "You are here.").
* As specified by ANSI, the system now always prints keywords
as #\: followed by SYMBOL-NAME, even when *PACKAGE* is the
KEYWORD package.
* The default initial SIZE of HASH-TABLEs is now smaller.
* Type information from CLOS class dispatch is now propagated
into DEFMETHOD bodies, so that e.g.
(DEFMETHOD FOO ((X SINGLE-FLOAT))
(+ X 123.0))
is now basically equivalent to
(DEFMETHOD FOO ((X SINGLE-FLOAT))
(DECLARE (TYPE SINGLE-FLOAT X))
(+ X 123.0))
and the compiler can compile (+ X 123.0) as a SINGLE-FLOAT-only
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.
* Since I don't seem to be making big file reorganizations very often
any more (and since my archive of sbcl-x.y.zv.tar.bz2 snapshots
is overflowing my ability to conveniently back them up), I've finally
checked the system into CVS. (The CVS repository is on my home system,
not at SourceForge -- putting it on SourceForge might come later.)
* SB-EXT:*GC-NOTIFY-STREAM* has been added, to control where the
high-level GC-NOTIFY-FOO functions send their output. (There's
still very little control of where low-level verbose GC functions
send their output.) The SB-EXT:*GC-VERBOSE* variable now controls
less than it used to -- the GC-NOTIFY-FOO functions are now under
the control of *GC-NOTIFY-STREAM*, not *GC-VERBOSE*.
* The system now stores the version string (LISP-IMPLEMENTATION-VERSION)
in only one place in the source code, and propagates it automatically
everywhere that it's needed. Thus e.g. when I bump the version from
0.6.6 to 0.6.7, I'll only need to modify the sources in one place.
* The C source files now include boilerplate legalese and documentation
at the head of each file (just as the Lisp source files already did).
* At Dan Barlow's suggestion, the hyperlink from the SBCL website
to his page will be replaced with a link to his new CLiki service.
changes in sbcl-0.6.7 relative to sbcl-0.6.6:
* The system has been ported to OpenBSD.
* The system now compiles with a simple "sh make.sh" on the systems
that it's supported on. I.e., now you no longer need to tweak
text in the target-features.lisp-expr and symlinks in src/runtime/
by hand, the make.sh takes care of it for you.
* The system is no longer so grossly inefficient when compiling code
involving vectors implemented as general (not simple) vectors (VECTOR T),
so code which dares to use VECTOR-PUSH-EXTEND and FILL-POINTER, or
which dares to use the various sequence functions on non-simple
vectors, takes less of a performance hit.
* There is now a primitive type predicate VECTOR-T-P
to test for the (VECTOR T) type, so that e.g.
(DEFUN FOO (V) (DECLARE (TYPE (VECTOR T) V)) (AREF V 3))
can now be compiled with some semblance of efficiency. (The old code
turned the type declaration into a full call to %TYPEP at runtime!)
* AREF on (VECTOR T) is still not fast, since it's still compiled
as a full call to SB-KERNEL:DATA-VECTOR-REF, but at least the
ETYPECASE used in DATA-VECTOR-REF is now compiled reasonably
efficiently. (The old version made full calls to SUBTYPEP at runtime!)
* (MAKE-ARRAY 12 :FILL-POINTER T) is now executed less inefficiently,
without making full calls to SUBTYPEP at runtime.
(Some analogous efficiency issues for non-simple vectors specialized to
element types other than T, or for non-simple multidimensional arrays,
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
*BACKEND-FASL-FILE-VERSION* has been bumped to 4.
* (TYPEP (MAKE-ARRAY 12 :FILL-POINTER 4) 'VECTOR) now returns (VALUES T)
instead of (VALUES T T).
* By following the instructions that Dan Barlow posted to sbcl-devel
on 2 July 2000, I was able to enable primitive dynamic object
file loading code for Linux. The full-blown CMU CL LOAD-FOREIGN
functionality is not implemented (since it calls ld to resolve
library references automatically, requiring RUN-PROGRAM for its
implementation), but a simpler SB-EXT:LOAD-1-FOREIGN (which doesn't
try to resolve library references) is now supported.
* The system now flushes the standard output streams when it terminates,
unless QUIT is used with the RECKLESSLY-P option set. It also flushes
them at several other probably-convenient times, e.g. in each pass of
the toplevel read-eval-print loop, and after evaluating a form given
as an "--eval" command-line option. (These changes were motivated by a
discussion of stream flushing issues on cmucl-imp in August 2000.)
* The source transform for TYPEP of array types no longer assumes
that an array whose element type is a not-yet-defined type
is implemented as an array of T, but instead punts, so that the
type will be interpreted at runtime.
* There is now some support for cross-compiling in make.sh: each of
the phases of make.sh has its own script. (This should be transparent
to people doing ordinary, non-cross-compile builds.)
* Since my laptop doesn't have hundreds of megabytes of memory like
my desktop machine, I became more motivated to do some items on
my to-do list in order to reduce the size of the system a little:
** Arrange for various needed-only-at-cold-init things to be
uninterned after cold init. To support this, those things have
been renamed from FOO and *FOO* to !FOO and *!FOO* (i.e., all
symbols with such names are now uninterned after cold init).
** Bind SB!C::*TOP-LEVEL-LAMBDA-MAX* to a nonzero value when building
fasl files for cold load.
** Remove the old compiler structure pooling code (which used to
be conditional on the target feature :SB-ALLOC) completely.
** Redo the representation of some data in cold init to be more compact.
(I also looked into supporting byte compiled code at bootstrap time,
which would probably reduce the size of the system a lot, but that
looked too complicated, so I punted for now.)
* The maximum signal nesting depth in the src/runtime/ support code has
been reduced from 4096 to 256. (I don't know any reason for the very
large old value. If the new smaller value turns out to break something,
I'll probably just bump it back up.)
* PPRINT-LOGICAL-BLOCK is now pickier about the types of its arguments,
as per ANSI.
* Many, many bugs reported by Peter Van Eynde have been added to
the BUGS list; some have even been fixed.
* While enabling dynamic object file loading, I tried to make the
code easier to understand, renaming various functions and variables
with less ambiguous names, and changing some function calling
conventions to be Lispier (e.g. returning NIL instead of 0 for failure).
* While trying to figure out how to do the OpenBSD port, I tried to
clean up some of the code in src/runtime/. In particular, I dropped
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,
the source file target-features.lisp-expr has been replaced with the
source file base-target-features.lisp-expr and the machine-generated
file local-target-features.lisp-expr.
* fixed a stupid quoting error in make.sh so that using CMU CL
"lisp -batch" as cross-compilation host works again
changes in sbcl-0.6.8 relative to sbcl-0.6.7:
* The system is now under CVS at SourceForge (instead of the
CVS repository on my home machine).
* The new signal handling code has been tweaked to treat register
contents as (UNSIGNED-BYTE 32), as the old CMU CL code did,
instead of (SIGNED-BYTE 32), as the C header files have it. (Code
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,
e.g. (BUTLAST '(1 2 3) -1).)
* (BUTLAST NIL) and (NBUTLAST NIL) now return NIL as they should.
(This was one of the bugs Peter Van Eynde reported back in July.)
* The system now uses code inspired by Colin Walters' O(N)
implementation of MAP (from the cmucl-imp@cons.org mailing
list, 2 September 2000) when it can't use a DEFTRANSFORM to
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
of the general M-argument sequence-of-length-N case required
O(M*N*N) time when any of the sequence arguments were LISTs.)
* The QUIT :UNIX-CODE keyword argument has been renamed to
QUIT :UNIX-STATUS. (The old name still works, but is deprecated.)
* Raymond Wiker's patches to port RUN-PROGRAM from CMU CL to SBCL
have been added.
* Raymond Wiker's patches to port dynamic loading from Linux to
FreeBSD have been added.
* The BUGS file is now more nearly up to date, thanks in large part
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.
* FINISH-OUTPUT is now called more consistently on QUIT. (It
used to not be called for a saved Lisp image.)
* Martin Atzmueller's version of a patch to fix a compiler crash,
as posted on sbcl-devel 13 September 2000, has been installed.
* 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.
* A bug in signal handling which kept TRACE from working on OpenBSD
has been fixed.
* added enough DEFTRANSFORMs to allow (SXHASH 'FOO) to be optimized
away by constant folding
* The system now defines its address space constants in one place
(in the Lisp sources), and propagates them automatically elsewhere
(through GENESIS and the sbcl.h file). Therefore, patching the
address map is less unnecessarily tedious and error-prone. The
Lisp names of address space constants have also been systematized.
* CVS tags like dollar-Header-dollar have been removed from
the sources, because they have never saved me trouble and
they've been source of trouble working with patches and other
diff-related operations.
* fixed the PROG1-vs.-PROGN bug in HANDLER-BIND (reported by
ole.rohne@cern.ch on cmucl-help@cons.org 2000-10-25)
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
*DEBUG-CONDITION*, so that it's less likely to fall into infinite
regress.
* The build system now uses an additional file, customize-target-features.lisp,
to allow local modifications to the target *FEATURES* list. (The point of
this is that now I can set up a custom configuration, e.g. with :SB-SHOW
debugging features enabled, without having to worry about propagating it
into everyone's system when I do a "cvs update".) When no
customize-target-features.lisp file exists, the target *FEATURES* list
should be constructed the same way as before.
* fixed bugs in DEFCONSTANT ANSI-compatibility:
** DEFCONSTANT now tests reassignments using EQL, not EQUAL, in order to
warn about behavior which is undefined under the ANSI spec. Note: This
is specified by ANSI, but it's not very popular with programmers.
If it causes you problems, take a look at the new SB-INT:DEFCONSTANT-EQX
macro in the SBCL sources for an example of a workaround which you
might use to make portable ANSI-standard code which does what you want.
** DEFCONSTANT's implementation is now based on EVAL-WHEN instead of on
pre-ANSI IR1 translation magic, so it does the ANSI-specified thing
when it's used as a non-toplevel form. (This is required in order
to implement the DEFCONSTANT-EQX macro.)
** (DEFCONSTANT X 1) (DEFVAR X) (SETF X 2) no longer "works".
** Unfortunately, non-toplevel DEFCONSTANT forms can still do some
funny things, due to bugs in the implementation of EVAL-WHEN
(bug #IR1-3). This probably won't be fixed until 0.7.x. (Fortunately,
non-toplevel DEFCONSTANTs are uncommon.)
* The core file version number and fasl file version number have been
incremented, because the old noncompliant DEFCONSTANT behavior involved
calling functions which no longer exist, and because I also took the
opportunity to chop an unsupported slot out of the DEBUG-SOURCE structure.
* fixed bug 1 (error handling before read-eval-print loop starts), and
redid debugger restarts and related debugger commands somewhat while
doing so:
** The QUIT debugger command is gone, since it did something
rather different than the SB-EXT:QUIT command, and since it never
worked properly outside the main toplevel read/eval/print loop.
Invoking the new TOPLEVEL restart provides the same functionality.
** The GO debugger command is also gone, since you can just invoke
the CONTINUE restart directly instead.
** The TOP debugger command is also gone, since it's redundant with the
FRAME 0 command, and since it interfered with abbreviations for the
TOPLEVEL restart.
* The system now recovers better from non-PACKAGE values of the *PACKAGE*
variable.
* The system now understands compound CONS types (e.g. (CONS FIXNUM T))
as required by ANSI. (thanks to Douglas Crosher's CMU CL patches, with
some porting work by Martin Atzmueller)
* Martin Atzmueller reviewed the CMU CL mailing lists and came back
with a boatload of patches which he ported to SBCL. Now that those
have been applied,
** The system tries to make sure that its low-priority messages
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.)
** The system now optimizes INTEGER-LENGTH better, thanks to more
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.
** The system understands ANSI-style non-KEYWORD &KEY arguments in
lambda lists, thanks to a patch originally by Pierre Mai.
** The system no longer bogusly warns about "abbreviated type
declarations".
** The compiler gets less confused by inlining and RETURN-FROM,
thanks to some patches originally by Tim Moore.
** The system no longer hangs when dumping circular lists to fasl
files, thanks to a patch originally from Douglas Crosher.
* Martin Atzmueller also fixed ROOM, so that it no longer fails with an
undefined function error.
* gave up on fixing bug 3 (forbidden-by-ANSI warning for type mismatch
in structure slot initforms) for now, documented workaround instead:-|
* fixed bug 4 (no WARNING for DECLAIM FTYPE of slot accessor function)
* fixed bug 5: added stubs for various Gray stream functions called
in the not-a-CL:STREAM case, so that even when Gray streams aren't
installed, at least appropriate type errors are generated
* fixed bug 8: better reporting of various PROGRAM-ERRORs
* fixed bug 9: IGNORE and IGNORABLE now work reasonably and more
consistently in DEFMETHOD forms.
* removed bug 21 from BUGS, since Martin Atzmueller points out that
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-0.6.10 relative to sbcl-0.6.9:
* A patch from Martin Atzmueller seems to have solved the SIGINT
problem, and as far as we know, signal-handling now works cleanly.
(If you find any new bugs, please report them!)
* The system no longer defaults Lisp source file names to types
".l", ".cl", or ".lsp", but only to ".lisp".
* The compiler no longer uses special default file extensions for
byte-compiled code. (The ANSI definition of COMPILE-FILE-PATHNAME
seems to expect a single default extension for all compiled code,
and there's no compelling reason to try to stretch the standard
to allow two different extensions.) Instead, byte-compiled files
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.
* DECLARE/DECLAIM/PROCLAIM logic is more nearly ANSI in general, with
many fewer weird special cases.
* Bug #17 (differing COMPILE-FILE behavior between logical and
physical pathnames) has been fixed, and some related misbehavior too,
thanks to a patch from Martin Atzmueller.
* Bug #30 (reader problems) is gone, thanks to a CMU CL patch
by Tim Moore, ported to SBCL by Martin Atzmueller.
* Martin Atzmueller fixed several filesystem-related problems,
including bug #36, in part by porting CMU CL patches, which were
written in part by Paul Werkowski.
* More compiler warnings in src/runtime/ are gone, thanks to
more patches from Martin Atzmueller.
* Martin Atzmueller pointed out that bug 37 was fixed by his patches
some time ago.
changes in sbcl-0.6.11 relative to sbcl-0.6.10:
* Martin Atzmueller pointed out that bugs #9 and #25 are gone in
current SBCL.
* bug 34 fixed by Martin Atzmueller: dumping/loading instances works
better
* fixed bug 40: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE,
and UPGRADED-COMPLEX-PART-TYPE now work better with of compound
types built from undefined types, e.g. '(VECTOR SOME-UNDEF-TYPE).
* 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
executed. (The compiler could flag local calls with full WARNINGs,
as per the ANSI spec "3.2.2.3 Semantic Constraints", but right now
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
later than before. (There should be some supported way for users
to override the default verbosity, but I haven't decided how to
provide it yet, so this behavior is still controlled by the internal
SB-C::*COMPILER-ERROR-PRINT-FOO* variables in
src/compiler/ir1util.lisp.)
* 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
LOAD-FOREIGN-1) now works, thanks to a patch from Martin Atzmueller.
* The default behavior of RUN-PROGRAM has changed. Now, unlike CMU CL
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
do other bad things. The CMU-CL-style :ENV option is retained
for porting convenience.
* LOAD-FOREIGN (and LOAD-1-FOREIGN) now support logical pathnames,
as per Daniel Barlow's suggestion and Martin Atzmueller's patch
changes in sbcl-0.6.12 relative to sbcl-0.6.11:
* incompatible change: The old SB-EXT:OPTIMIZE-INTERFACE declaration
is no longer recognized. I apologize for this, because it was
listed in SB-EXT as a supported extension, but I found that
its existing behavior was poorly specified, as well as incorrectly
specified, and it looked like too much of a mess to straighten it
out. I have enough on my hands trying to get ANSI stuff to work..
* many patches ported from CMU CL by Martin Atzmueller, with
half a dozen bug fixes in pretty-printing and the debugger, and
half a dozen others elsewhere
* fixed bug 13: Floating point infinities are now supported again.
They might still be a little bit flaky, but thanks to bug reports
from Nathan Froyd and CMU CL patches from Raymond Toy they're not
as flaky as they were.
* The --noprogrammer command line option is now supported. (Its
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.)
* The :SB-PROPAGATE-FLOAT-TYPE and :SB-PROPAGATE-FUN-TYPE features
are now supported, and enabled by default. Thus, the compiler can
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
and DEFUN better, and implements CHECK-TYPE more correctly, and
SBCL builds under CMU CL again despite its non-ANSI EVAL-WHEN,
thanks to patches from Martin Atzmueller.
* various fixes to make the cross-compiler more portable to
ANSI-conforming-but-different cross-compilation hosts (notably
Lispworks for Windows, following bug reports from Arthur Lemmens)
* A bug in READ-SEQUENCE for CONCATENATED-STREAM, and a gross
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.
(When I was first setting up SBCL, I misunderstood a compile-time
conditional #-OLD-SPECFUN, and so accidentally deleted them.)
* improved support for type intersection and union, fixing bug 12
(e.g., now (SUBTYPEP 'KEYWORD 'SYMBOL)=>T,T) and some other
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
<http://www-jcsu.jesus.cam.ac.uk/ftp/pub/debian/lisp>.
From his sbcl-devel e-mail of 2001-04-08 they're not completely
stable, but are nonetheless usable. When he's ready, I'd be happy
to add them to the SourceForge "File Releases" section. (And if
anyone wants to do RPMs or *BSD packages, they'd be welcome too.)
* new fasl file format version number (because of changes in
internal representation of (OR ..) types to accommodate the new
support for (AND ..) types, among other things)
changes in sbcl-0.6.13 relative to sbcl-0.6.12:
* a port to the Compaq/DEC Alpha CPU, thanks to Dan Barlow
* Martin Atzmueller ported Tim Moore's marvellous CMU CL DISASSEMBLE
patch, so that DISASSEMBLE output is much nicer.
* The code in the SB-PROFILE package now seems reasonably stable.
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.
* Pathnames and *DEFAULT-DIRECTORY-DEFAULTS* are much more
ANSI-compliant, thanks to various fixes and tests from Dan Barlow.
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
link itself. (In these cases the old code signalled an error and
looped endlessly, respectively.) Thus, DIRECTORY now works even
in the presence of dangling and cyclic symbolic links.
* Compiler trace output (the :TRACE-FILE option to COMPILE-FILE)
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.
* The default for SB-EXT:*DERIVE-FUNCTION-TYPES* has changed to
NIL, i.e. ANSI behavior, i.e. the compiler now recognizes
that currently-defined functions might be redefined later with
different return types.
* Hash tables can be printed readably, as inspired by CMU CL code
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
* A bug in READ has been fixed, so that now a single Ctrl-D
character suffices to cause end-of-file on character streams.
In particular, now you only need one Ctrl-D at the command
line (not two) to exit SBCL.
* fixed bug 26: ARRAY-DISPLACEMENT now returns (VALUES NIL 0) for
undisplaced arrays.
* fixed bug 107 (reported as a CMU CL bug by Erik Naggum on
comp.lang.lisp 2001-06-11): (WRITE #*101 :RADIX T :BASE 36) now
does the right thing.
* The implementation of some type tests, especially for CONDITION
types, is now tidier and maybe faster, due to CMU CL code
originally by Douglas Crosher, ported by Martin Atzmueller.
* Some math functions have been fixed, and there are new
optimizers for deriving the types of COERCE and ARRAY-ELEMENT-TYPE,
thanks to Raymond Toy's work on CMU CL, ported by Martin Atzmueller.
* (There are also some new optimizers in contrib/*-extras.lisp. Those
aren't built into sbcl-0.6.13, but are a sneak preview of what's
likely to be built into sbcl-0.7.0.)
* A bug in COPY-READTABLE was fixed. (Joao Cachopo's patch to CMU
CL, ported to SBCL by Martin Atzmueller)
* DESCRIBE now gives more information in some cases. (Pierre Mai's
patch to CMU CL, ported to SBCL by Martin Atzmueller)
* Martin Atzmueller and Bill Newman fixed some bugs in INSPECT.
* There's a new slam.sh hack to shorten the edit/compile/debug
cycle for low-level changes to SBCL itself, and a new
:SB-AFTER-XC-CORE target feature to control the generation of
the after-xc.core file needed by slam.sh.
* minor incompatible change: The ENTRY-POINTS &KEY argument to
COMPILE-FILE is no longer supported, so that now every function
gets an entry point, so that block compilation looks a little
more like the plain vanilla ANSI section 3.2.2.3 scheme.
* minor incompatible change: SB-EXT:GET-BYTES-CONSED now
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
CL:GET-INTERNAL-RUN-TIME.)
* minor incompatible change: The old CMU-CL-style DIRECTORY options,
i.e. :ALL, :FOLLOW-LINKS, and :CHECK-FOR-SUBDIRS, are no longer
supported. Now DIRECTORY always does the abstract Common-Lisp-y
thing, i.e. :ALL T :FOLLOW-LINKS T :CHECK-FOR-SUBDIRS T.
* Fasl file version numbers are now independent of the target CPU,
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-0.7.0 relative to sbcl-0.6.13:
* major incompatible change: The default fasl file extension, i.e. the
default extension for files produced by COMPILE-FILE, has changed
to ".fasl", for all architectures. (No longer ".x86f" and ".axpf".)
* compiler changes:
** There are many changes in the implementation of the compiler.
SBCL is now essentially a compiler-only implementation of ANSI
Common Lisp. EVAL still "interprets" a few special cases, but
almost all the interesting cases are handled by creating
a LAMBDA expression, calling COMPILE on it, then calling
FUNCALL on the result.
** The EVAL-WHEN code has been rewritten to be ANSI-compliant, and
various related bugs (IR1-1, IR1-2, IR1-3, IR1-3a) have gone away.
Since the code is newer, there might still be some new bugs
(though not as many as before Martin Atzmueller's fixes:-). But
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.
** The revised compiler is still a little unsteady on its feet.
In particular,
*** The debugging information it produces (particularly the names
of FUNCTION objects) is sometimes much less useful than what
the old compiler produced.
*** The support for inlining FOO when you (DECLAIM (INLINE FOO))
then do (DEFUN FOO ..) in a non-null lexical environment (e.g.
within a MACROLET) has been temporarily weakened.
** There are new compiler optimizations for various functions:
*** the sequence functions FIND, POSITION, FIND-IF, POSITION-IF,
FIND-IF-NOT, POSITION-IF-NOT, and FILL
*** 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
inline-expands a function and does type analysis on the result,
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.
It's not clear how this should be fixed, and for now, a
workaround is given in the entry for 117 in the BUGS file.
** (Because of the interaction between the two previous items --
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:
** As part of a bug fix by Christophe Rhodes to DIRECTORY behavior,
DIRECTORY no longer implicitly promotes NIL slots of its
pathname argument to :WILD. In particular, when you ask for the
contents of a directory (which you used to be able to do without
explicit wildcards, e.g. (DIRECTORY "/tmp/")) you now need to use
explicit wildcards, e.g. (DIRECTORY "/tmp/*.*").
** changes in behavior that ANSI explicitly defines to be
implementation dependent:
*** The new compiler-only implementation still conforms with ANSI,
but acts a little different than before. Besides the obvious
changes in performance tradeoffs (that the cost per form passed
to EVAL has gone up, and the cost per form executed by EVAL
has gone down), the behavior of the system changes a little
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.
*** The value of INTERNAL-TIME-UNITS-PER-SECOND has been increased
from 100 to 1000.
*** The default for the USE list in MAKE-PACKAGE and DEFPACKAGE
has changed from (:CL) to NIL.
*** The CHAR-NAME of unprintable ASCII characters which, unlike
e.g. #\Newline and #\Tab, don't have names specified in the
ANSI Common Lisp standard, is now based on their ASCII symbolic
names (#\Nul, #\Soh, #\Stx, etc.) The old CMU-CL-style names
(#\Null, #\^a, #\^b, etc.) are still accepted by NAME-CHAR, but
are no longer used for output.
** changes in internal implementation constants:
*** The default value of *BYTES-CONSED-BETWEEN-GCS* has doubled, to
4 million. (If your application spends a lot of time GCing and
you have a lot of RAM, you might want to experiment with
increasing it even more.)
** The SB-C-CALL package has been merged into the SB-ALIEN package.
However, almost all old code should still continue to work without
immediate update, as SB-C-CALL is now a (deprecated) nickname
for SB-ALIEN.
** Old operator names in the style DEF-FOO are now deprecated in
favor of new corresponding names DEFINE-FOO, for consistency with
the naming convention used in the ANSI standard (DEFSTRUCT, DEFVAR,
DEFINE-CONDITION, DEFINE-MODIFY-MACRO..). This mostly affects
internal symbols, but a few supported extensions like
SB-ALIEN:DEF-ALIEN-FUNCTION are also affected. (So e.g.
DEF-ALIEN-FUNCTION becomes DEFINE-ALIEN-FUNCTION.)
** The debugger prompt sequence now goes "5]", "5[2]", "5[3]",
etc. as you get deeper into recursive calls to the debugger
command loop, instead of the old "5]", "5]]", "5]]]"
sequence. (I was motivated to do this when squabbles between
ILISP and SBCL left me very deeply nested in the debugger. In the
short term, this change will probably provoke more ILISP/SBCL
squabbles, but hopefully it will be an improvement in the long run.)
** SB-ALIEN:DEFINE-ALIEN-FUNCTION (also known by the old deprecated
name DEF-ALIEN-FUNCTION) now does DECLAIM FTYPE for the defined
function, since declaiming return types involving aliens is
(1) annoyingly messy to do by hand and (2) vital to efficient
compilation of code which calls such functions.
** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are no
longer reexported by the SB-EXT package. They're solely useful
for alien code, so it seems more logical that you should get
them from the SB-ALIEN package, not in SB-EXT.
** :SB-CONSTRAIN-FLOAT-TYPE, :SB-PROPAGATE-FLOAT-TYPE, and
:SB-PROPAGATE-FUN-TYPE are no longer considered to be optional
features. Instead, the code that they used to control is always
built into the system.
* many other bug fixes
** DEFSTRUCT and DEFCLASS have been substantially updated to take
advantage of the new EVAL-WHEN stuff and to clean them up in
general, and they are now more ANSI-compliant in a number of
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*
and *PRINT-LENGTH*) to symbols and lists of symbols
He also made several improvements and fixed several bugs in DESCRIBE.
** Alexey Dejneka fixed many bugs, including classic bugs and bugs he
discovered himself:
*** misbehavior of WRITE-STRING/WRITE-LINE
*** LOOP over keys of a hash table, LOOP bugs 49b and 81 and 103,
and several other LOOP problems as well
*** DIRECTORY when similar filenames are present
*** DEFGENERIC with :METHOD options
*** bug 126, in (MAKE-STRING N :INITIAL-ELEMENT #\SPACE))
*** bug in the optimization of ARRAY-ELEMENT-TYPE
*** argument ordering in FIND with :TEST option
*** mishandled package designator argument in APROPOS-LIST
*** various problems in the backquote readmacro
*** a bug in APROPOS
*** probably some others that I'm not describing very well here,
since the CVS log documents them by reference to sbcl-devel
messages, and the SourceForge archives aren't working well.:-(
** Dan Barlow improved the Alpha port (and is making progress on the
PPC port, for those of you who think different).
** Besides the DIRECTORY fixes and changes mentioned elsewhere,
Christophe Rhodes cleaned up the system self-test scripts (in tests/*),
contributed the optimization of FIND-IF-NOT and POSITION-IF-NOT, and
continues to work on the SPARC port (for those of you in a position
to look down upon our little PC-compatible boxes from a great height).
** PPRINT-LOGICAL-BLOCK now copies the *PRINT-LINES* value on entry
and uses that copy, rather than the current dynamic value, when
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))
(print (aref possiblybigthings i) stream)))))
should now truncate the logical block only at 50 lines, instead of
often truncating it at 8 lines, as it did before.
* The doc/cmucl/ directory, containing old CMU CL documentation
from the time of the fork, is no longer part of the base system.
SourceForge has shut down its anonymous FTP service, and with it
my original plan for distributing the old CMU CL documentation
there. For now, if you need these files you can download an old
SBCL source release and extract them from it.
* The fasl file version number changed again, for dozens of reasons,
some of which are apparent above.
changes in sbcl-0.7.1 relative to sbcl-0.7.0:
* mostly bug fixes:
** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are set
up properly again. (There was a packaging bug in 0.7.0 which
left their definitions in SB-SYS::LOAD-FOREIGN and
SB-SYS::LOAD-1-FOREIGN. LOAD-FOREIGN and LOAD-1-FOREIGN are
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.)
** DEFGENERIC is now choosier about the methods it redefines, so that
reLOADing a previously-LOADed file containing DEFGENERICs does
the right thing now. Thus, the Lispy edit/reLOAD-a-little/test
cycle now works as it should. (thanks to Alexey Dejneka)
** Bug 106 (types (COMPLEX FOO) where FOO is an obscure type) was
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-0.7.2 relative to sbcl-0.7.1:
* incompatible change: The compiler is now less aggressive about
tail call optimization, doing it only when (> SPACE DEBUG) or
(> SPEED DEBUG). (This is an incompatible change because there are
programs which relied on the old CMU-CL-style behavior to optimize
away their unbounded recursion which will now die of stack overflow.)
* minor incompatible change: The default BYTES-CONSED-BETWEEN-GCS
for non-GENCGC systems has been increased to 20M (since that
seems much closer to the likely performance optimum for modern
systems than the old 4M value was)
* minor incompatible change: new larger values for *DEBUG-PRINT-LENGTH*
and *DEBUG-PRINT-LEVEL*
* SBCL runs on SPARC systems now. (thanks to Christophe Rhodes' port
of CMU CL's support for SPARC, and various endianness and other
SBCL portability fixes due to Christophe Rhodes and Dan Barlow)
* new syntactic sugar for the Unix command line: --load foo.bar is now
an alternate notation for --eval '(load "foo.bar")'.
* bug fixes:
** The system now detects stack overflow and handles it gracefully,
at least for (OR (> SAFETY (MAX SPEED SPACE)) (= SAFETY 3))
optimization settings. (This is a good thing in general, and
its introduction in this version should be particularly timely
for anyone whose code fails because of suppression of tail
recursion!)
** The system now hunts for the C variable "environ" in a more
devious way, to avoid segfaults when the C library version differs
between compile time and run time. (thanks to Christophe Rhodes)
** INTEGER-valued CATCH tags now work. (thanks to Alexey Dejneka,
and also to Christophe Rhodes for porting the fix to non-X86 CPUs)
** The compiler no longer issues bogus style warnings for undefined
classes in the same source file as the DEFCLASSes which defined
them. (thanks to Stig E Sandoe for reporting and Martin Atzmueller
for fixing this)
** fixes in CONDITION class precedence list for undefined function
errors (thanks to Alexei Dejneka)
** *DEFAULT-PATHNAME-DEFAULTS* is used more consistently and
correctly. (thanks to Dan Barlow)
** portability fixes aiming at bootstrapping under CLISP (thanks
to Dave McDonald and Christophe Rhodes)
** FORMAT fixes (thanks to Robert Strandh and Dan Barlow)
** fixes in type translation and and type inference (thanks to
Christophe Rhodes)
** fixes to optimizer internal errors (thanks to Alexei Dejneka)
** various fixes in the new ports (thanks to Dan Barlow)
* several changes related to debugging:
** suppression of tail recursion, as noted above
** stack overflow detection, as noted above
** The default implementation of TRACE has changed. :ENCAPSULATE T
is now the default. (For some time encapsulation has been more
reliable than the breakpoint-based :ENCAPSULATE NIL
implementation, at least on X86 systems; and I just noticed that
encapsulation also seems closer to the spirit of the ANSI
specification.)
changes in sbcl-0.7.3 relative to sbcl-0.7.2:
* ANSI's DEFINE-SYMBOL-MACRO is now supported. (thanks to Nathan
Froyd porting CMU CL code originally by Douglas Thomas Crosher)
* SBCL now runs on the PPC archtiecture under Linux. It actually did
this as of 0.7.1.45, but was left out of the previous news section
(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)
* cleanups to the runtime on SPARC, both Linux and Solaris, and for
gcc>=3 (thanks to Nathan Froyd and Ingvar Mattsson)
* SPARC backend cleanups, allowing builds of cores optimized for V8
and V9 SPARCS, and also emission of code targeted to a particular
backend chosen at runtime (thanks to Christophe Rhodes and Raymond
Toy)
* SBCL is closer to bootstrapping under CLISP, thanks to various
fixes by Christophe Rhodes.
* The fasl file format has changed again, to allow the compiler's
INFO database to support symbol macros.
* The user manual (in doc/) is formatted into HTML more nicely.
(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
likely to return (VALUES NIL NIL) in general, and in particular
bugs 58 and (the remaining bits of) bug 50 are fixed. (thanks to
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.
* (not a change in the main branch of SBCL, but a related prototype
which can hopefully be merged into the main branch of SBCL in the
future:) Brian Spilsbury has produced a Unicode-enabled variant of
sbcl-0.7.0, available as a patch against sbcl-0.7.0 at
<http://designix.com.au/brian/SBCL/sbcl-0.7.0-unicode.p0.gz>.
* Bug 151 fixed: GET-DISPATCH-MACRO-CHAR now returns NIL for undefined
dispatch macro character combinations. (thanks to Alexey Dejneka)
* Bugfix in PARSE-NAMESTRING: we now correctly parse unix namestrings
that superficially look like logical namestrings correctly.
* USER-HOMEDIR-PATHNAME now returns a (physical) pathname that SBCL
can deal with.
* Bugfix in DEFSTRUCT: BOA constructor lambda lists now accept (name
default supplied-p) for &optional and &key arguments. (thanks to
Martin Atzmueller)
changes in sbcl-0.7.4 relative to sbcl-0.7.3:
* bug 147 fixed: The compiler preserves its block link/count
invariants more correctly now so that it doesn't crash. (thanks
to Alexey Dejneka)
* Dynamic loading of object files in OpenBSD is now supported. (thanks
to Pierre Mai)
* COMPILE now works correctly on macros. (thanks to Matthias Hoelzl)
* GET-MACRO-CHARACTER and SET-MACRO-CHARACTER now represent
no-value-for-this-character as NIL (as specified by ANSI).
* HOST-NAMESTRING on physical pathnames now returns a string that is
valid as a host argument to MERGE-PATHNAMES and to MAKE-PATHNAME.
(thanks to Christophe Rhodes)
* The Alpha port handles icache flushing more correctly. (thanks to
Dan Barlow)
* More progress has been made toward bootstrapping under CLISP. (thanks
to Christophe Rhodes)
* The fasl file format has changed again, because dynamic loading
on OpenBSD (which has non-ELF object files) motivated some cleanups
in the way that foreign symbols are transformed and passed around.
* minor incompatible change: The ASCII RUBOUT character, (CHAR-CODE 127),
is no longer treated as whitespace by the reader, but instead as
an ordinary character. Thus e.g. (READ-FROM-STRING "AB") returns
|AB|, instead of A as it used to.
changes in sbcl-0.7.5 relative to sbcl-0.7.4:
* SBCL now builds with OpenMCL (version 0.12) as the
cross-compilation host; also, more progress has been made toward
bootstrapping under CLISP.
* SBCL now runs on the Tru64 (aka OSF/1) operating system on the
Alpha architecture.
* bug 158 fixed: The compiler can now deal with integer loop
increments different from 1; fixing this turned out also to fix
bug 164.
* bug 169 fixed: no more bogus warnings about using lexical bindings
despite the presence of perfectly good SPECIAL declarations (thanks
to David Lichteblau)
* bug 175 fixed: CHANGE-CLASS is now more ANSI-conforming,
accepting initargs. (thanks to Espen Johnsen and Pierre Mai)
* bug 179 fixed: DIRECTORY can now deal with filenames with pattern
characters in them.
* bug 180 fixed: Method combination specifications no longer ignore
the :MOST-SPECIFIC-LAST option. (thanks to Pierre Mai)
* bug fix: Structure type predicate functions now check their argument
count as they should.
* bug fix: Classes with :METACLASS STRUCTURE-CLASS now print
correctly. (thanks to Pierre Mai)
* minor incompatible change: The --noprogrammer option is deprecated
in favor of the new --disable-debugger option, which is very similar.
(The major difference is that it takes effect at a slightly different
time at startup, causing handling of errors in --sysinit and
--userinit files will be affected differently.) The
SB-EXT:DISABLE-DEBUGGER and SB-EXT:ENABLE-DEBUGGER functions have
been added to allow this functionality to be controlled from ordinary
Lisp code. (ENABLE-DEBUGGER should help people like the Debian
maintainers, who might want to run non-interactive scripts to
build SBCL cores which will later be used interactively.)
* minor incompatible change: The LOAD function no longer, when given
a wild pathname to load, loads all files matching that pathname.
Instead, an error of type FILE-ERROR is signalled.
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.
* Array initialization with :INITIAL-ELEMENT is now much faster for
cases when the compiler cannot open code the array creation, but
does know what the UPGRADED-ARRAY-ELEMENT-TYPE will be. General
array accesses have also seen a speed increase.
* bug fix: LOAD :IF-DOES-NOT-EXIST NIL now works when file type is
specified. (This was at the root of some bad interactions between
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.
* bug fix: Bad &REST syntax is now checked correctly. (thanks to
Raymond Toy's patch for CMU CL)
* Support for the Solaris 9 operating environment has been included
(thanks to Daniel Merritt)
* A very ugly but hopefully complete draft of the missing FFI chapter
of the manual has been created by reformatting the corresponding
CMU CL manual chapter into (currently very ugly and incoherent)
DocBook and bringing it up to date for SBCL behavior. Thus, the
manual is now essentially complete, at least by my extreme
once-and-only-once standards, whereby it's acceptable to refer to
the doc strings of SB-EXT functions as the primary documentation.
* The fasl file version number has changed again, due to cleanup of
(user-invisible) bitrotted stuff. (E.g. *!INITIAL-FDEFN-OBJECTS*
is no longer a static symbol.)
changes in sbcl-0.7.7 relative to sbcl-0.7.6:
* An alpha-quality port to the parisc architecture running Linux,
based on the old CMUCL backend, has been made. This, even more so
than the other backends, should be considered still a work in
progress; known problems include that the Linux kernel in 64-bit
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
functions declared in FLET and LABELS. (I.e. "LET conversion" is
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
exceptions no longer cause Bus errors on the SPARC/Linux platform.
* The detection and handling of control stack exhaustion (infinite
or very deeply nested recursion) has changed. Stack exhaustion
detection is now done by write-protecting pages at the OS level
and applies at all optimization settings; when found, a
SB-KERNEL:CONTROL-STACK-EXHAUSTED condition (subclass of
STORAGE-CONDITION) is signalled, so stack exhaustion can no longer
be caught using IGNORE-ERRORS.
* Bugs 65, 70, and 109 fixed: The compiler now preserves invariants
correctly when transforming recursive LABELS functions to LETs.
(thanks to Alexey Dejneka)
* Bug 48a./b. fixed: SYMBOL-MACROLET now refuses to bind symbols
that are names of constants or global variables.
* Bug fix: DEFINE-ALIEN-ROUTINE now declaims the correct FTYPE for
alien routines with docstrings.
* Bug 184 fixed: Division of ratios by the integer 0 now signals an
error of type DIVISION-BY-ZERO. (thanks to Wolfhard Buss and
Raymond Toy)
* Bug fix: Errors in PARSE-INTEGER are now of type PARSE-ERROR.
(thanks to Eric Marsden)
* Bug fix: COERCE to (COMPLEX FLOAT) of rationals now returns an
object of type (COMPLEX FLOAT). (thanks to Wolfhard Buss)
* Bug fix: The SPARC backend can now compile functions involving
LOGAND and stack-allocated arguments. (thanks to Raymond Toy)
* Bug fix: We no longer segfault on passing a non-FILE-STREAM stream
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)
* Bug 192 fixed: The internal primitive DATA-VECTOR-REF can now be
constant-folded without failing an assertion. (thanks to Einar
Floystad Dorum for reporting this)
* Bugs 123 and 165 fixed: array specializations on as-yet-undefined
types are now dealt with more correctly by the compiler.
* Minor incompatible change: COMPILE-FILE-PATHNAME now merges its
OUTPUT-FILE argument with its INPUT-FILE argument, resulting in
behaviour analogous to RENAME-FILE. This puts its behaviour more
in line with ANSI's wording on COMPILE-FILE-PATHNAME. (thanks to
Marco Antinotti)
* The fasl file version number has changed again. (because of the
bug fix involving the names of PCL MAKE-INSTANCE functions)
changes in sbcl-0.7.8 relative to sbcl-0.7.7:
* A beta-quality port to the mips architecture running Linux,
based on the old CMUCL backend, has been made. It has been tested
on a big-endian kernel, and works sufficiently well to be able to
rebuild itself; it has not been tested in little-endian mode.
* fixed an inconsistency between gencgc.c and purify.c which made
dumping/loading .core files unreliable
* fixed bug 120a: The compiler now deals correctly with IFs where
the consequent is the same as the alternative, instead of
misderiving the return type. (thanks to Alexey Dejneka)
* fixed bug 113: Logical pathnames are now dumpable (the logical
host is resolved at load-time, throwing an error if it is not
found).
* fixed bug 174: FORMAT's error message is slightly clearer when a
non-printing character is used in a format directive.
* fixed several bugs in compiler checking of type declarations, i.e.
violations of the Python "declarations are assertions" principle
(thanks to Alexey Dejneka)
* fixed several bugs in PCL's error checking (thanks to Gerd
Moellmann)
* fixed bug: printing of FILE-ERROR (thanks to Antonio
Martinez-Shotton)
* 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
operations (MAX, +, LOGXOR, etc.) which have had so much TLC
lavished on them in the past that they can be compiled in many
ways in different special cases
* fixed bug 181: compiler checks validity of user supplied type
specifiers
* 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
internal utility functions like COERCE-TO-SIMPLE-VECTOR (used
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-0.7.9 relative to sbcl-0.7.8:
* minor incompatible change: The runtime (the Unix executable named
"sbcl") is now much pickier about the .core files it will load.
Essentially it now requires .core files to descend from the same
build (not just the same sources or LISP-IMPLEMENTATION-VERSION)
as the runtime does. (The intent is to prevent the crashes which
can occur, and which can even be reported as mysterious failures,
when people patch the sources or change the build parameters
without changing LISP-IMPLEMENTATION-VERSION, then mix and match
sbcl and .core files.)
* fixed bug: VALUES-LIST is no longer optimized away.
* fixed bug 142: The FFI conversion of C string values to Lisp
string values no longer conses excessively. (thanks to Nathan
Froyd porting Raymond Toy's fix to CMU CL)
* began to systematize and improve MOP conformance in PCL (thanks to
Nathan Froyd, Gerd Moellman and Pierre Mai):
** SLOT-DEFINITION-ALLOCATION now returns :CLASS, not the class
itself;
** GENERIC-FUNCTION-ARGUMENT-PRECEDENCE-ORDER is now implemented;
** FINALIZE-INHERITANCE is now called on class finalization;
** DOCUMENTATION and (SETF DOCUMENTATION) now have the correct
argument precedence order.
* fixed bug 202: The compiler no longer fails on functions whose
derived types contradict their declared type.
* DEFMACRO is implemented via EVAL-WHEN instead of IR1 translation,
so it can be non-toplevel.
* The fasl file version number has changed (because of the new
implementation of DEFMACRO).
* (mostly) fixed bugs 46b and 46c: sequence functions now check, in
safe code, that any length requirement by their type-specifier
argument is valid. The exceptions to this are described in bug
213.
* fixed bugs 46h and 46i: TWO-WAY- and CONCATENATED-STREAM creation
functions now check the types of their inputs as required by ANSI.
* fixed bug 48c: SYMBOL-MACROLET signals PROGRAM-ERROR when an
introduced symbol is DECLAREd to be SPECIAL.
* fixed reading of (COMPLEX DOUBLE-FLOAT) literals from fasl files
* fixed bug: :COUNT argument to sequence functions may be negative
* fixed bug: body of DO-SYMBOLS may contain declarations
* fixed bug: PUSHNEW now evaluates its arguments from left to right
(reported by Paul F. Dietz, fixed by Gerd Moellman)
* fixed bug: PUSH, PUSHNEW and POP now evaluate a place given by a
symbol macro only once
* fixed printing of call frame when argument list is unavailable
* fixed bug: :ALLOW-OTHER-KEYS is an allowed keyword name
* compiler no longer signals WARNING on unknown keyword
:ALLOW-OTHER-KEYS
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.
* minor incompatible change: PCL now records the pathname of a file
in which methods and the like are defined, rather than its
truename.
* minor incompatible change: TRUENAME now considers the truename of
a file naming a directory to be the pathname with :DIRECTORY
component indicating that directory.
* minor incompatible change: a NAMED clause in the extended form of
LOOP no longer causes a BLOCK named NIL to surround the LOOP. The
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):
** the standard ANSI CL generic function NO-NEXT-METHOD is now
implemented;
** DEFINE-METHOD-COMBINATION no longer signals an error for
primary methods with no specializers;
** the MOP generic function GENERIC-FUNCTION-DECLARATIONS is now
implemented;
** the Readers for Class Metaobjects methods CLASS-DIRECT-SLOTS
and CLASS-DIRECT-DEFAULT-INITARGS have been implemented for
FORWARD-REFERENCED-CLASSes; error reporting on
CLASS-DEFAULT-INITARGS, CLASS-PRECEDENCE-LIST and CLASS-SLOTS
has been improved;
** SXHASH on CLOS instances now uses a slot internal to the
instance to return different numbers on distinct instances,
while preserving the same return value through invocations of
CHANGE-CLASS;
** DEFMETHOD signals errors when methods with longer incongruent
lambda lists are added to generic functions;
** COMPUTE-CLASS-PRECEDENCE-LIST now has a method specialized on
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;
** DEFINE-METHOD-COMBINATION now works with the :ARGUMENTS option.
* fixed some bugs shown by Paul Dietz' test suite:
** DOLIST puts its body in TAGBODY;
** SET-EXCLUSIVE-OR sends arguments to :TEST function in the
correct order;
** MULTIPLE-VALUE-SETQ evaluates side-effectful places before
value producing form;
** if more variables are given to PROGV than values, extra
variables are bound and made to have no value;
** NSUBSTITUTE on list arguments gets the right answer with
:FROM-END;
** ELT signals an error of type TYPE-ERROR when the index argument
is not a valid sequence index;
** LOOP signals (at macroexpansion time) an error of type
PROGRAM-ERROR when duplicate variable names are found;
** LOOP supports DOWNTO and ABOVE properly; (thanks to Matthew Danish)
** FUNCALL of special-operators now cause an error of type
UNDEFINED-FUNCTION;
** PSETQ now works as required in the presence of side-effecting
symbol-macro places;
** NCONC accepts any object as its last argument;
** :COUNT argument to sequence functions may be BIGNUM; (thanks to
Gerd Moellman)
** loop-for-as-package does not require a package to be explicitely
specified;
** LOOP WITH now treats NIL in the d-var-spec correctly as an
ignored binding.
* fixed bug 166: compiler preserves "there is a way to go"
invariant when deleting code.
* fixed bug 172: macro lambda lists with required arguments after
&REST arguments now cause an error to be signalled. (thanks to
Matthew Danish)
* fixed Entomotomy PEEK-CHAR-WRONGLY-ECHOS-TO-ECHO-STREAM
bug. (thanks to Matthew Danish)
* fixed bug 225: STRING-STREAM is now a class. (reported by Gilbert
Baumann)
* fixed bug 136: CALL-NEXT-METHOD no longer gets confused when
arguments are lexically rebound. (thanks to Gerd Moellmann and
Pierre Mai)
* fixed bug 194: error messages are now more informative when there
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
Fondren)
* fixed bug in COUNT-IF, making it handle :FROM-END correctly
(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-0.7.11 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
:CONC-NAME section of the specification of DEFSTRUCT. (thanks to
Valtteri Vuorikoski)
* The compiler is now able to inline functions that were defined in
a complex lexical environment (e.g. inside a MACROLET).
* fixed bug in DESCRIBE, which now works on rank-0 arrays. (thanks
to Lutz Euler)
* Support for the upcoming FreeBSD-5.0 release has been included.
(thanks to Dag-Erling Smorgrav)
* fixed bug 219: DEFINE-COMPILER-MACRO no longer has compile-time
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
Moellmann)
* fixed bug in COERCE, which now signals an error on coercing a
rational to a bounded real type which excludes the expected
answer.
* The compiler is now able to derive types more accurately from the
COERCE and COMPILE functions.
* fixed bug 223: functional binding is considered to be constant
only for symbols in the CL package.
* fixed bug 231: SETQ did not check the type of a variable being set
(reported by Robert E. Brown)
* A new optimization for MAKE-INSTANCE has been included, fixing
various bugs (including relating to :ALLOCATION :CLASS slots and
:DEFAULT-INITARGS over-eager evalueation). (thanks to Gerd
Moellmann)
* fixed some LOOP bugs revealed by Paul Dietz' test suite:
** 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);
** LOOP now signals an error when any variable is reused in the
same loop (including the potentially useful construct analogous
to WITH A = 1 WITH A = (1+ A);
** IT is only a special loop symbol within the first clause of a
conditional loop clause;
** LOOP with a typed iteration variable over a hashtable now
signals a type error iff it should.
* fixed some other bugs revealed by Paul Dietz' test suite:
** FILE-STREAM now names the class previously known as FD-STREAM;
** in DEFSTRUCT, a bare :CONC-NAME (or a :CONC-NAME with no
argument) no longer signals an error;
** likewise in DEFSTRUCT, :CONC-NAME NIL now respects the package
of the slot symbol, rather than using the current package
((:CONC-NAME "") continues to intern the slot's name in the
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-0.7.12 relative to sbcl-0.7.11:
* minor incompatible change: code processed by the "interpreter" or
EVAL now has a compilation optimization policy of (DEBUG 2)
(changed from (DEBUG 1)) to improve debuggability of interactive
development, and to allow the use of the debug RETURN command in
such code.
* an experimental implementation of the RETURN command for the
debugger has been included. (thanks to Frederik Kuivinen)
* fixed bug 62: constraints were not propagated into a loop.
* fixed bug in embedded calls of SORT (reported and investigated by
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);
** BOA constructor with &AUX argument without a default value does
not cause a type error;
** CONSTANTP now returns true for all self-evaluating objects.
changes in sbcl-0.7.13 relative to sbcl-0.7.12:
* incompatible packaging change: in line with Unix convention,
SBCL now looks for its core file in /usr/{local/,}lib/sbcl/sbcl.core
if it's not in $SBCL_HOME. It also sets SBCL_HOME to match.
* 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;
* fixed a bug in LOG, so that LOG of a rational argument near 1 now
gives a closer approximation to the right answer than previously.
(thanks to Raymond Toy)
* fixed bug 157: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE and
UPGRADED-COMPLEX-PART-TYPE now take (ignored, in all situations)
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
FUNCTION-LAMBDA-EXPRESSION are either NIL or suitable for input to
COMPILE or FUNCTION.
* fixed a bug in DEFSTRUCT: predicates for :NAMED structures with
:TYPE will no longer signal errors on innocuous objects.
* fixed bug 231b: SETQ is better at respecting type declarations in
the lexical environment.
* fixed a bug in DEFCLASS: classes named by symbols with no or
unprintable packages can now be defined.
* fixed a bug in RESTART-BIND: The :TEST-FUNCTION option had been
carelessly renamed to :TEST-FUN. (thanks to Robert E. Brown)
* fixed compiler failure related to checking types of functions.
(reported by Robert E. Brown)
* the compiler is now much more consistent in its error-checking
treatment of bounding index arguments to sequence functions: in
(SAFETY 3) code, errors will be signalled in almost all cases if
invalid sequence bounding indices are passed to functions defined
by ANSI to operate on sequences.
* fixed a bug in the build procedure: documentation of SBCL-specific
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)
* fixed a bug in the reader: the #n# reader macro now works for
objects of type STANDARD-OBJECT. (reported by Tony Martinez)
* the compiler is now aware that SYMBOL-FUNCTION returns a FUNCTION
and that READ-DELIMITED-LIST returns a LIST. (thanks to Robert
E. Brown and Tony Martinez respectively)
* PCL is now smarter about SLOT-VALUE, (SETF SLOT-VALUE) and
SLOT-BOUNDP: in particular, it is now able to optimize them much
better, and is now not vulnerable to having packages renamed.
Furthermore, a compliance bug has been fixed: SLOT-MISSING is now
always called when a slot is not present in an instance. (thanks
to Gerd Moellmann)
* fixed a bug related to CONCATENATED-STREAMs: PEEK-CHAR will no
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:
** ARRAY-IN-BOUNDS-P now allows arbitrary integers as arguments,
not just nonnegative fixnums;
** the logical bit-array operators such as BIT-AND now accept an
explicit NIL for their "opt-arg" argument (to indicate a
freshly-consed result bit-array);
** ELT now signals an error on an invalid sequence index in safe
code;
** the type system is now cleverer about negations of numeric
types, and consequently understands the BIGNUM and RATIO types
better;
** the type system is now cleverer about the interaction between
INTEGER and RATIO types: while bugs still remain, many more
cases are accurately computed;
** in TYPECASE, OTHERWISE now only introduces an otherwise-clause
if it is in the last clause;
** CONSTANTLY now correctly returns a side-effect-free function in
all cases;
** DECLARE is no longer treated as a special-operator; in
particular, SPECIAL-OPERATOR-P no longer returns T for DECLARE;
* incremented fasl file version number due to the change in the
DEFSTRUCT-SLOT-DESCRIPTION structure.
changes in sbcl-0.7.14 relative to sbcl-0.7.13:
* a better implementation of SXHASH on (simple) bit vectors,
measured both in execution speed and in distribution of results
over the positive fixnums, has been installed. Likewise, a better
implementation of EQUAL for simple bit vectors is now available.
* fixed CEILING optimization for a divisor of form 2^k.
* fixed bug 240 (emitting extra style warnings "using the lexical
binding of the symbol *XXX*" for &OPTIONAL arguments). (reported
by Antonio Martinez)
* fixed SXHASH, giving different results for NIL depending on type
declarations (SYMBOL or LIST). (thanks to Gerd Moellmann)
* fixed bug in DEFPARAMETER and DEFVAR: they could assign a lexical
variable. (found by Rolf Wester)
* SBCL does not ignore type declarations for special
variables. (reported by rif on c.l.l 2003-03-05)
* some bug fixes in contrib/sb-aclrepl/
* fixed some bugs revealed by Paul Dietz' test suite:
** a bug in the CONS type specifier, whereby the CAR and CDR
types got intertwined, has been fixed;
** the type system is now able to reason about the interaction
between INTEGER and RATIO types more completely;
** APPEND, [N]REVERSE and NRECONC check that those their
arguments, which must be proper lists, are really so;
** An array specialized to be unable to hold elements has been
implemented, as required -- yes, really -- by ANSI;
** GETF and GET-PROPERTIES throw a TYPE-ERROR, not a SIMPLE-ERROR,
on malformed property lists;
changes in sbcl-0.8alpha.0 relative to sbcl-0.7.14
* experimental native threads support (on x86 Linux >=2.4 only).
This is not compiled in by default: you need to add :SB-THREAD to
the target features. See the "Beyond ANSI" chapter of the manual
for details.
* fix for longstanding nonANSIism: The old distinction between
CL:CLASS objects and SB-PCL:CLASS objects has been eliminated.
The return value from CL:FIND-CLASS is now a CLOS class, and
likewise that of CL:CLASS-OF; CL:BUILT-IN-CLASS,
CL:STRUCTURE-CLASS and CL:STANDARD-CLASS name CLOS classes.
* An interface to the MetaObject Protocol, as described in Kiczales,
des Rivieres and Bobrow's "The Art of the Metaobject Protocol",
MIT Press, 1991, is available from the SB-MOP package.
* incompatible change: the SB-PCL package should now be considered
a private implementation detail, and no longer a semi-private MOP
interface.
* 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.
* minor incompatible change: Previously, all --eval forms used were
processed with READ before any of them were processed with EVAL.
Now each --eval form is processed with both READ and EVAL before
the next --eval form is processed. (Thus package operations like
sbcl --eval "(defpackage :foo)" --eval "(print 'foo::bar)" now
work as the user might reasonably expect.)
* minor incompatible change: *STANDARD-INPUT* is now only an
INPUT-STREAM, not a BIDIRECTIONAL-STREAM. (thanks to Antonio
Martinez)
* minor incompatible change: Y-OR-N-P is now character-oriented,
not line oriented. Also, YES-OR-NO-P now works without errors.
(thanks to Antonio Martinez)
* sb-aclrepl module improvements: an integrated inspector, added
repl features, and a bug fix to :trace command.
* Known functions, which cannot be open coded by the backend, are
considered to be able to check types of their arguments. (fixing
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
Baumann)
* SB-MOP:ENSURE-CLASS-USING-CLASS now takes its arguments in the
specified-by-AMOP order of (CLASS NAME &REST ARGS &KEY).
* SB-MOP:COMPUTE-EFFECTIVE-SLOT-DEFINITION now takes the
required-by-AMOP NAME argument, as well as CLASS and
DIRECT-SLOT-DEFINITIONS. (thanks to Kevin Rosenberg)
* fixed bug 20: DEFMETHOD can define methods using names that are
not the proper names of classes to designate class specializers.
* bug fix: INTERACTIVE-STREAM-P now works on streams associated with
Unix file descriptors, instead of blowing up. (thanks to Antonio
Martinez)
* Garbage collection refactoring: user-visible change is that a
call to the GC function during WITHOUT-GCING will not do garbage
collection until the end of the WITHOUT-GCING. If you were doing
this you were probably losing anyway.
* fixed bug in MEMBER type: (MEMBER 0.0) is not the same as
(SINGLE-FLOAT 0.0 0.0), because of the existence of -0.0 which is
TYPEP the latter but not the former.
* The compiler issues a full WARNING for calls to undefined functions
with names from the CL package.
* MAP-INTO for a vector destination is open coded. (reported by
Brian Downing on c.l.l)
* bug fix: the long form of DEFINE-METHOD-COMBINATION now accepts a
documentation string.
* fixed some bugs revealed by Paul Dietz' test suite:
** COPY-ALIST now signals an error if its argument is a dotted
list.
** Condition slots are now accessed more correctly in the presence
of multiple initargs for a given slot.
** The USE-VALUE, CONTINUE and STORE-VALUE functions now correctly
exclude restarts of the same name associated with a different
condition.
** 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)
** CONVERT-MORE-CALL failed on a lambda list (&KEY). (thanks to
Gerd Moellmann)
** &WHOLE and &REST arguments in macro lambda lists are patterns.
** NSET-EXCLUSIVE-OR does not return extra elements when its
arguments contain duplicated elements.
** RESTART-CASE understands local macros.
** RESTART-CASE associates exactly its own restarts with a condition.
** ENDP in safe mode checks its argument to be of type LIST.
** COPY-SYMBOL in a threaded build no longer fails when the symbol
in question is unbound.
** Optimized MAKE-INSTANCE functions no longer cause internal
assertion failures in the presence of duplicate initargs.
** SLOT-MAKUNBOUND returns the instance acted upon, not NIL.
** Side-effectful :DEFAULT-INITARGS have their side-effects
propagated even in the ctor optimized implementation of
MAKE-INSTANCE.
** :ALLOW-OTHER-KEYS NIL is now accepted in an initarg list.
changes in sbcl-0.8.0 relative to sbcl-0.8alpha.0
* SBCL now builds using CLISP (version of late April 2003 from CVS) as
cross-compilation host. As a consequence, we can now bootstrap our
way up to SBCL starting with a bare gcc toolchain and human-readable
source code (first the source to CLISP, then the source to SBCL).
* A contributed module containing a partial implementation of the
simple-streams interface has been included. (thanks to Rudi
Schlatte)
* A contributed module implementing the RFC1321 Message Digest
Algorithm, known as MD5, has been included.
* minor incompatible change: The :NEGATIVE-ZERO-IS-NOT-ZERO feature
no longer has any effect, as the code controlled by this feature
has been deleted. (As far as we know, no-one has ever built using
this feature, and its semantics were confused in any case).
* minor incompatible change: As a consequence of making SLOT-EXISTS-P
work on conditions (as required by the ANSI specification),
SLOT-VALUE, (SETF SLOT-VALUE) and SLOT-BOUNDP likewise have the
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:
** the GENERIC-FUNCTION type is no longer disjoint from FUNCTION
types.
** &ENVIRONMENT parameter in macro lambda list is bound first.
** SXHASH on condition objects no longer returns NIL.
** :ALLOCATION :CLASS slots are better treated; their values are
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
STRUCTURE-CLASS).
** SLOT-EXISTS-P now works on conditions, as well as structures
and CLOS instances.
** MAKE-LOAD-FORM now has the required methods on
STRUCTURE-OBJECT, CONDITION and STANDARD-OBJECT.
** MAKE-LOAD-FORM-SAVING-SLOTS no longer returns a special
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.
** DEFGENERIC now checks that the :ARGUMENT-PRECEDENCE-ORDER
option is consistent with the required arguments of the generic
function lambda list.
* bug fix: REQUIRE accepts a string designator. (Thanks to
Antonio Martinez.)
* bug fix: SB-MOP:DIRECT-SLOT-DEFINITION-CLASS and
SB-MOP:EFFECTIVE-SLOT-DEFINITION-CLASS now have the
specified-by-AMOP lambda list of (CLASS &REST INITARGS).
* bug fix: The compiler now checks for duplicated variables in macro
lambda lists.
* bug fix: SETQ on globals returns the correct value.
* fixed bug 47.d: (DEFGENERIC IF (X)) now signals a PROGRAM-ERROR,
not a COMPILER-ERROR (followed by some other strange error on
choosing the CONTINUE restart).
* bug fix: make.sh and friends are now more consistent in the way that
they look for GNU "make".
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
errors.
* minor incompatible change: the system is now aware of the types of
variables in the COMMON-LISP package, and will signal errors for
most violations of these type constraints (where previously they
were silently accepted).
* minor incompatible change: COMPILE-FILE now uses the freedom
afforded (ANSI 3.2.2.3) 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
redefinition. (Currently it does not work with high DEBUG level.)
* minor incompatible change: VALUES declaration is disabled.
* When issuing notes, the compiler now signals a condition of type
SB-EXT:COMPILER-NOTE, and provides an associated MUFFLE-WARNING
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
handleable in a similar fashion. However, at the moment, no such
note subtypes yet exist. (SB-INT:SIMPLE-COMPILER-NOTE exists,
but it's an implementation detail, not a classification for the
purpose above.)
* Changes in type checking closed the following bugs:
** type checking of unused values (192b, 194d, 203);
** template selection based on unsafe type assertions (192c, 236);
** type checking in branches (194bc).
* A short form of VALUES type specifier has ANSI meaning (it has
increased the number of situations when SBCL cannot perform type
checking).
* fixed bug in DEFSTRUCT: once again, naming structure slots with
keywords or constants is permissible.
* STREAM-READ-SEQUENCE and STREAM-WRITE-SEQUENCE now have methods
defined on the relevant FUNDAMENTAL-BINARY-{INPUT,OUTPUT}-STREAM
classes. (thanks to Antonio Martinez)
* improved ANSIness in DESCRIBE: The DESCRIBE function no longer
outputs FRESH-LINE or TERPRI, and no longer converts its stream
argument to a pretty-print stream. Instead, it leaves any such
operations to DESCRIBE-OBJECT methods.
* bug fix: APROPOS now respects the EXTERNAL-ONLY flag. (reported
by Teemu Kalvas)
* bug fix: NIL is now a valid destructuring argument in DEFMACRO
lambda lists. (thanks to David Lichteblau)
* bug fix: Defining a generic function with a :METHOD-CLASS being a
subclass of STANDARD-METHOD no longer causes stack exhaustion.
(thanks to Gerd Moellmann)
* fixed bug 246: increased compilation speed of long
MULTIPLE-VALUE-BIND (and likewise of NTH-VALUE with a constant
integer argument)
* a contributed module implementing COMPILER-LET and MACROEXPAND-ALL
has been included.
* DEFCONSTANT now throws a condition of type
SB-EXT:DEFCONSTANT-UNEQL if it is being asked to redefine a
constant to a non-EQL value; CONTINUE and ABORT restarts
respectively change and preserve the value.
* fixed bug 63: The code walker, part of the implementation of CLOS,
is now better at handling symbol macros.
* bug fix: There is no longer an internal implementation type named
CL:LENGTH. (reported by Raymond Toy)
* bug fix: In macro-like defining macros/special operators the
implicit block does not enclose the lambda list.
* fixed bugs 10 and 43: Bare VALUES, AND, OR and MEMBER symbols (not
enclosed in parentheses) are not suitable as type specifiers, and
their use properly signals an error now.
* bug fix: An argument count mismatch for a type specifier in code
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.
* bug fix: SEARCH now applies its TEST predicate to the elements of
the arguments in the correct order. (thanks to Wolfhard Buss)
* fixed bug 235b: The compiler uses return types of MAPCAR and friends
in type inference. (thanks to Robert E. Brown)
* bug fix: Reading in symbols with an explicit package name of ""
(e.g. '||::FOO) now works correctly. (reported by Henrik Motakef)
* fixed some bugs revealed by Paul Dietz' test suite:
** NIL is now allowed as a structure slot name.
** Arbitrary numbers, not just REALs, are allowed in certain
circumstances in LOOP for-as-arithmetic clauses.
** Multiple class redefinitions before slot access no longer
causes a type error.
** (SETF FIND-CLASS) now accepts NIL as an argument to remove the
association between the name and a class.
** Generic functions with non-standard method-combination and over
five methods all of which return constants no longer return NIL
after the first few invocations. (thanks to Gerd Moellmann)
** CALL-NEXT-METHOD with no arguments now passes the original
values of the arguments, even in the presence of assignment.
** Functions [N]SUBST*, LAST, NRECONC, [N]SUBLIS may return any
object.
** DISASSEMBLE works with closures and funcallable instances.
** ADD-METHOD now returns the generic function, not the new method.
** FIND-METHOD signals an error if the lengths of the specializers
is incompatible with the generic function, even if the ERRORP
argument is true.
** TYPE-OF returns recognizeable subtypes of all built-in-types of
which its argument is a member.
** DEFCLASS only redefines the class named by its class-name
argument if that name is the proper name of the class;
otherwise, it creates a new class.
** SLOT-UNBOUND now correctly initalizes the CELL-ERROR-NAME slot
of the UNBOUND-SLOT condition to the name of the slot.
** (SETF (AREF bv 0) ...) did not work for bit vectors.
** SLOT-UNBOUND and SLOT-MISSING now have their return values
treated by SLOT-BOUNDP, SLOT-VALUE, (SETF SLOT-VALUE) and
SLOT-MAKUNBOUND in the specified fashion.
changes in sbcl-0.8.2 relative to sbcl-0.8.1:
* fixed bug 148: failure to inline-expand a local function left
garbage, confusing the compiler.
* fixed bugs 3cd: structure slot readers perform type check if the
slot can have an invalid value (i.e. it is either not initialized
or can be written with a less specific slot writer).
* bug fix: the compiler now traps array references to elements off
the end of an array; previously, the bounds checking in some
circumstances could go off-by-one.
* improved MACHINE-VERSION, especially on Linux (thanks to Lars
Brinkhoff)
* type declarations for array element types now obey the description
on the CLHS page "Declaration TYPE", as per discussions on
sbcl-help around 2003-05-08. This means that a declaration
(TYPE (ARRAY FOO) BAR) means that, within the scope of the
declaration, all references to BAR will be asserted or assumed
(with THE, so dependent on compiler policy) to involve objects of
type FOO. Note that no such declaration is implied in
(MAKE-ARRAY .. :ELEMENT-TYPE 'FOO).
* declared types of functions from the "Conditions"
chapter. (reported by Paul Dietz)
* bug fix: CERROR accepts a function as its first argument.
* 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)
* bug fix: (SETF AREF) on byte-sized-element arrays with constant index
argument now works properly on the MIPS platform.
* fixed compiler failure on (TYPEP x '(NOT (MEMBER 0d0))).
* repeated evaluation of the same DEFSTRUCT, a slot of which is
declared to have a functional type, does not cause an error
anymore.
* fixed bug: sometimes MAKE-INSTANCE did not work with classes with
many :DEFAULT-INITARGS. (reported by Istvan Marko)
* fixed bug: if last continuation of a deleted block has a
destination, this destination should be deleted too. (reported by
ohler on #lisp)
* fixed a bug in the bootstrap process: the host compiler's values
of ARRAY-DIMENSION-LIMIT and ARRAY-TOTAL-SIZE-LIMIT no longer leak
into the newly-built SBCL. (reported by Eric Marsden on #lisp,
test case from Patrik Nordebo)
* improved the ability of the disassembler on the PPC platform to
provide helpful disassembly notes.
* SB-MOP:CLASS-PROTOTYPE on built-in-classes returns an instance of
the class in more cases than previously.
* bug fix: FILE-POSITION now understands :START and :END for
STRING-INPUT-STREAMs. (thanks to Nikodemus Siivola)
* bug fix: (SIGNED-BYTE 8) streams no longer return (UNSIGNED-BYTE
8) data. (thanks to David Lichteblau)
* bug fix: it is possible to add a method to a generic function
without lambda list.
* bug fix: reader failed to signal END-OF-FILE inside an
object representation. (reported by Nikodemus Siivola)
* fixed some bugs revealed by Paul Dietz' test suite:
** LAST and [N]BUTLAST should accept a bignum.
** condition slot accessors are methods.
** (VECTOR NIL) is a subtype of STRING.
changes in sbcl-0.8.3 relative to sbcl-0.8.2:
* SBCL now builds and runs on MacOS X (version 10.2), or perhaps
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
SB-EXT:CODE-DELETION-NOTE (a subtype of SB-EXT:COMPILER-NOTE) with
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)
* New ASDF-INSTALL contrib can be used for automatic download and
installation of third-party Lisp code from CCLAN or other sites
via CLiki.
* Threaded builds (:SB-THREAD) now support SB-THREAD:INTERRUPT-THREAD,
which forces another thread to execute a function supplied by the
caller.
* bug 75 fix: WITH-OUTPUT-TO-STRING (and MAKE-STRING-OUTPUT-STREAM)
now accept and act upon their :ELEMENT-TYPE keyword argument.
(reported by Martin Atzmueller, Edi Weitz)
* bug fix: FILE-POSITION now accepts position designators up to
ARRAY-DIMENSION-LIMIT or the extreme of the off_t range, whichever
is the greater. (thanks to Patrik Nordebo)
* bug fix: MAKE-ARRAY ignored :INITIAL-CONTENTS NIL. (reported by
Kalle Olavi Niemitalo)
* bug fix: the CLASS-PROTOTYPE of the GENERIC-FUNCTION class is now
printable. (reported by Eric Marsden)
* bug fix in sb-posix: mmap() now works on systems with a 64-bit
off_t, including Darwin and FreeBSD. (thanks to Andreas Fuchs)
* x86 bug fix in control stack exhaustion checking: now shows backtrace
* bug fix in WITH-TIMEOUT: now the body can have more than one form.
(thanks to Stig Sandoe)
* bug fix in READ-SEQUENCE: READ-SEQUENCE following PEEK-CHAR or
UNREAD-CHAR now correctly includes the unread character in the
target sequence. (thanks to Gerd Moellmann)
* bug fix in threaded builds: the system can now be suspended and
resumed by shell job control with minimal disruption.
* bug fixes in times and timezones >2038AD
* better handling of "where is GNU make?" problem in build scripts
(thanks to Nikodemus Siivola)
* new optimization: inside a named function any reference to a
function with the same name is considered to be a self-reference;
this behaviour is controlled with SB-C::RECOGNIZE-SELF-CALLS
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.
** FFLOOR, FTRUNCATE, FCEILING and FROUND work with integers.
** ASSOC now ignores NIL elements in an alist.
** CEILING now gives the right answer with MOST-NEGATIVE-FIXNUM
and (1+ MOST-POSITIVE-FIXNUM) answers.
** The addition of a method with invalid qualifiers to a generic
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.
* changed .fasl file version number, in part to add type codes for
new array subtypes UNSIGNED-BYTE 7, 15, 29, and 31 mandated by
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)
support has been systematized, and now supports the methods
specified by ANSI, along with a default method and a method for
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)
* bug fix: RUN-PROGRAM now does not fail if some element in $PATH
names a non-existent directory. (thanks to Andreas Fuchs)
* bug fix: ROUND and TRUNCATE could, under certain circumstances on
the PPC platform, lead to stack corruption; this has been fixed.
(reported by Rainer Joswig)
* bug fix: ASH on an (UNSIGNED-BYTE 32) with a shift of -32 or lower
no longer ever returns 1 instead of 0. (thanks to Lars Brinkhoff)
* 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.
* 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: 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
small float arguments.
** (FLOAT X) for X of type DOUBLE-FLOAT now returns X in all
circumstances.
** optimizer for (EXPT X 0) did not work for X not of type FLOAT.
** (GCD 0 <negative-integer>) returned <negative-integer>.
** LCM should return a non-negative integer.
** PARSE-INTEGER returned the index of a terminator instead of the
upper bounding index of a substring in case :JUNK-ALLOWED NIL.
** PARSE-INTEGER returned an incorrect index being applied to a
displaced string.
** LCM with two arguments of 0 returns 0 rather than signalling
DIVISION-BY-ZERO.
** unsigned addition of a 32-bit constant with the high bit set no
longer causes an internal compiler error on the x86.
** LOGBITP accepts a non-negative bignum as its INDEX argument.
** 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.
* 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)
* 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 derive type.
planned incompatible changes in 0.8.x:
* (not done yet, but planned:) When the profiling interface settles
down, it might impact TRACE. They both encapsulate functions, and
it's not clear yet how e.g. UNPROFILE will interact with TRACE
and UNTRACE. (This shouldn't matter, though, unless you are using
profiling. If you never profile anything, TRACE should continue to
behave as before.)
* (not done yet, but planned:) Inlining can now be controlled the
ANSI way, without MAYBE-INLINE, since the idiom
(DECLAIM (INLINE FOO))
(DEFUN FOO (..) ..)
(DECLAIM (NOTINLINE FOO))
(DEFUN BAR (..) (FOO ..))
(DEFUN BLETCH (..) (DECLARE (INLINE FOO)) (FOO ..))
now does what ANSI says it should. The CMU-CL-style
SB-EXT:MAYBE-INLINE declaration is now deprecated and ignored.
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