1 changes in sbcl-0.8.13 relative to sbcl-0.8.12:
2 * new feature: SB-PACKAGE-LOCKS. See the "Package Locks" section of
3 the manual for details; add :SB-PACKAGE-LOCKS in
4 customize-target-features.lisp to enable them.
5 * minor incompatible change: as threatened around sbcl-0.8.0, the
6 home package of MOP-related symbols is now SB-MOP, not SB-PCL.
7 The symbols are also exported from SB-PCL for backwards
8 compatibility, but more so than before SB-PCL should be treated as
9 an implementation-internal package.
10 * the SB-SPROF contrib now works on (most) non-x86 architectures.
11 It is known as of this release not to work on the Alpha, however.
12 * fixed bug: initialization of condition class metaobjects no longer
13 causes an instance of the condition to be created. (reported by Marco
15 * fixed bug #167: errors signalled due to illegal syntax in method
16 bodies are now more legible.
17 * fixed bug #338: instances of EQL-SPECIFIER are now valid type
18 designators and can hence be used with TYPEP.
19 * fixed bug #333: CHECK-TYPE now ensures that the type error
20 signalled, if any, has the right object to be accessed by
21 TYPE-ERROR-DATUM. (reported by Tony Martinez)
22 * fixed bug #340: SETF of VALUES obeys the specification in ANSI
23 5.1.2.3 for multiple-value place subforms. (reported by Kalle
25 * fixed bug #334: programmatic addition of slots using specialized
26 methods on SB-MOP:COMPUTE-SLOTS works for :ALLOCATION :INSTANCE
27 and :ALLOCATION :CLASS slots.
28 * fixed a bug: #\Space (and other whitespace characters) are no
29 longer considered to be macro characters in standard syntax by
32 changes in sbcl-0.8.12 relative to sbcl-0.8.11:
33 * minor incompatible change: the system no longer provides
34 optimization hints (conditions which are TYPEP
35 SB-EXT:COMPILER-NOTE) for conforming code in default compilation
36 mode; these hints are still emitted when higher SPEED optimization
38 * new contrib module: a sampling profiler (profiling by statistical
39 sampling, rather than by instrumenting functions) is available as
40 the SB-SPROF contrib. (thanks to Gerd Moellmann and Juho Snellman)
41 * the behaviour of the standard function ED is now customizeable by
42 third parties through a hook variable: see ED's documentation
43 string for information on the protocol.
44 * the compiler no longer emits efficiency notes for (FUNCALL X)
45 when the type of X is uncertain under default optimization
47 * fixed bug 276: mutating a binding of a specialized parameter to a
48 method to something that is not TYPEP the specializer is now
50 * fixed bugs 45d and 118: DOUBLE-FLOAT[-NEGATIVE]-EPSILON now
51 exhibit the required behaviour on the x86 platform. (thanks to
52 Peter van Eynde, Eric Marsden and Bruno Haible)
53 * fixed bug 335: ATANH now computes the inverse hyperbolic tangent
54 even for difficult arguments. (reported by Peter Graves)
55 * fixed bug 141a: the backquote printer now descends quoted
57 * fixed another bug in backquote printing: no more destructive
58 modification of the form's list structure. (reported by Brian
60 * fixed bug in INTERRUPT-THREAD: pin the function, so that it cannot
61 move between its address being taken and the call to
62 interrupt_thread, fixing a crashing race condition.
63 * the SB-POSIX contrib implementation has been adjusted so that it
64 no longer exhibits ridiculously poor performance when constructing
65 instances corresponding to C structs.
67 changes in sbcl-0.8.11 relative to sbcl-0.8.10:
68 * minor incompatible change: the sb-grovel contrib now treats C
69 structures as alien (in the sense of SB-ALIEN) objects rather than
70 as undistinguished (simple-array (unsigned-byte 8) (*))s. This
71 has implications for memory management of client code
72 (sb-grovel-returned objects must now be manually managed) and for
73 type safety (alien objects now have full types).
74 * new feature: the SB-EXT:MUFFLE-CONDITIONS declaration should be
75 used to control emission of compiler diagnostics, rather than the
76 SB-EXT:INHIBIT-WARNINGS OPTIMIZE quality. See the manual for
77 documentation on this feature. The SB-EXT:INHIBIT-WARNINGS
78 quality should be considered deprecated.
79 * install.sh now installs the user manual as well
80 * (not quite a new documentable feature, but worth considering in
81 the light of the new SB-EXT:MUFFLE-CONDITIONS declaration): the
82 beginnings of a semantically meaningful condition hierarchy is
83 under development, for use in SB-EXT:MUFFLE-CONDITIONS and by
85 * fixed bug: PARSE-NAMESTRING now accepts any valid pathaname
86 designator as the defaults argument.
87 * fixed bug: Displaced arrays whose displaced-to array has become
88 too small now cause ARRAY-DIMENSION to signal an error, providing
89 for safer bounds-checking. (reported by Bruno Haible)
90 * fixed bug: DEFCLASS slot definitions with identical :READER and
91 :WRITER names now signal a reasonable error. (reported by Thomas
93 * fixed bug: CLOSE :ABORT T on appending stream no longer causes
95 * fixed bug: Invalid slot specification errors now print correctly.
96 (thanks to Zach Beane)
97 * fixed bug 320: Shared to local slot value transfers in class
98 redefinitions now happen corrently from superclasses as
99 well. (reported by Bruno Haible)
100 * fixed bug 316: SHIFTF now accepts VALUES forms. (reported by Bruno
102 * fixed bug 322: DEFSTRUCT :TYPE LIST type predicates now handle
103 improper lists correctly. (reported by Bruno Haible)
104 * fixed bug 313: source-transform for <fun-name> was erroneously
105 applied to a call of a value of a variable with name <fun-name>.
106 (reported by Antonio Menezes Leitao)
107 * fixed bug 307: The obsolete instance protocol ensures that
108 subclasses are properly obsoleted. (thanks to Nikodemus Siivola)
109 * fixed bug 298, revealed by Paul F. Dietz' test suite: SBCL can
110 remove dead unknown-values globs from the middle of the stack.
111 * added a new restart to *BREAK-ON-SIGNALS* handling to make it
112 easier to resume long computations after using *BREAK-ON-SIGNALS*
113 to diagnose and fix failures. (thanks to Nikodemus Siivola)
114 * fixed bug reported by PFD in lisppaste #747 (and Bruno Haible from
115 CLISP test suite): WRITE-TO-STRING is not constant-foldable.
116 * fixed bugs in COMPLEX type specifier: UPGRADED-COMPLEX-PART-TYPE
117 is now consistent with (COMPLEX <x>); bugs in treatment of COMPLEX
118 MEMBER and UNION types have likewise been fixed. (thanks to Bruno
120 * fixed a (fairly theoretical) bug in string printing: if
121 *PRINT-READABLY* is true, signal PRINT-NOT-READABLE if the string
122 does not have array-element-type equal to the most general string
124 * fixed bug: SET-PPRINT-DISPATCH does not immediately resolve
125 function name. (thanks to Nikodemus Siivola)
126 * fixed bug: compile-time format string checker failed on
127 non-closed ~{. (reported by Thomas F Burdick)
128 * fixed bug: as reported by Kalle Olavi Niemitalo on #lisp IRC,
129 don't warn on legal loop code involving more than one aggregate
130 boolean. (thanks to Nikodemus Siivola)
131 * fixed bug: as reported by Peter Graves on #lisp IRC, passing a NIL
132 in keyword position to MAKE-PACKAGE was not being reported as
134 * fixed bug: as reported by Juan Ripoll on cmucl-imp,
135 MULTIPLE-VALUE-BIND should be able to lexically bind lambda list
137 * fixed bugs 280 and 312: the checking for multiple definitions in a
138 file is less likely to become confused by uses of inline
140 * fixed bug: the #S reader macro performs the keyword coercion
141 specified for slot names. (reported by Kalle Niemitalo)
142 * fixed bug: lambda lists may contain symbols whose names start with
143 & but are not lambda-list-keywords; their occurrence triggers a
145 * fixed bug 321: define-method-combination argument lambda lists do
146 not cause invalid code to be generated when &optional or &aux
147 variables have default values. (reported by Bruno Haible)
148 * fixed bug 327: system subclasses of STRUCTURE-OBJECT or CONDITION
149 have CLOS classes; this appears also to have fixed reported
150 instability in stack exhaustion detection.
151 * fixed bug: the CONTROL-ERROR from ABORT, CONTINUE and
152 MUFFLE-WARNING when no associated restart is present is now
154 * optimization: rearranged the expansion of various defining macros
155 so that each expands into only one top-level form in a
156 :LOAD-TOPLEVEL context; this appears to decrease fasl sizes by
158 * optimization: used a previously little-used slot in symbols to
159 cache SXHASH values, yielding a 5-10% compiler speedup. (thanks
161 * fixed some bugs revealed by Paul Dietz' test suite:
162 ** MAKE-INSTANCES-OBSOLETE returns the class name when called with
164 ** Fixed an optimization bug related to inheritance of initforms
165 from local to shared slots.
166 ** FILE-POSITION works as specified on BROADCAST-STREAMs.
167 ** CAST optimizer forgot to flush argument derived type.
168 ** print/read consistency on floats is now orders of magnitude
169 more likely. (thanks also to Bruno Haible for a similar report
171 ** removed stack cleaning in the cleanup part of UNWIND-PROTECT.
172 ** IMAGPART is specified (infelicitously) to return (* 0 <thing>)
173 for objects of type REAL. Make it so.
174 ** SXHASH is specified (infelicitously) to respect similarity,
175 which means that (SXHASH 0.0) must equal (SXHASH -0.0). Make
176 it so. (thanks to Markus Ziegler)
177 ** on the Alpha, the compiler succeeds in compiling functions
178 returning a known number of arguments greater than 63.
179 ** fixed handling of invalid NIL arguments in keyword position
181 ** fixed non-pretty printing of arrays with *PRINT-RADIX* being
183 ** provided a readably-printable representation for RANDOM-STATE
185 ** ensured that pathnames, where they have a namestring, always
186 print using #P"..." syntax.
188 changes in sbcl-0.8.10 relative to sbcl-0.8.9:
189 * Support for the forthcoming 2.0 version of the NetBSD kernel
190 running on x86 hardware has been added. (thanks to Perry
191 E. Metzger most immediately, and others for their past work)
192 * SBCL now runs on OpenBSD 3.4. (Thanks to Scott Parish; 3.4 is the
193 current release version; SBCL's OpenBSD support had been broken
194 since about the time of OpenBSD's switch to ELF binary format.)
195 * [placeholder for DX summary]
196 ** user code with &REST lists declared dynamic-extent, under high
197 speed or space and low safety and debug optimization policy.
198 * The manual has been converted to Texinfo format and the debugger
199 chapter from the cmucl manual has been added.
200 * A facility has been added to extract documentation strings from
201 sbcl and store them as Texinfo-formatted snippets for inclusion in
202 the manual (via Texinfo's @include directive)
203 * bug fix: compiler emitted division in optimized DEREF. (thanks for
204 the test case to Dave Roberts)
205 * bug fix: multidimensional simple arrays loaded from FASLs had fill
206 pointers. (reported by Sean Ross)
207 * bug fix: PROFILE output is printed nicely even for large numerical
208 values. (thanks to Zach Beane)
209 * bug fix: streams with element-type (SIGNED-BYTE <N>) for <N>
210 greater than 32 handle EOF correctly.
211 * bug fix: on X86 an immediate argument of the IMUL instruction is
212 correctly printed in disassembly. (thanks to Lutz Euler)
213 * bug fix: class slots in redefined classes preserve their old
214 values. (thanks to Bruno Haible and Nikodemus Siivola)
215 * bug fix: compilation of funcalls of CXX+R (e.g. CDDR) now
216 succeeds. (reported by Marco Baringer)
217 * fixed some bugs revealed by Paul Dietz' test suite:
218 ** READ-SEQUENCE now works on ECHO-STREAMs.
219 ** RATIONALIZE works more according to its specification. (thanks
222 changes in sbcl-0.8.9 relative to sbcl-0.8.8:
223 * deprecation of old extension: *DEBUG-PRINT-LEVEL* and
224 *DEBUG-PRINT-LENGTH* are now deprecated in favor of the new, more
225 general SB-DEBUG:*DEBUG-PRINT-VARIABLE-ALIST* mechanism. (This
226 should matter to you only if you rebind the printer control
227 variables and then find you want different bindings in the
228 debugger than in the ordinary execution of your program.)
229 * The runtime build system has been tweaked to support building
230 (on SPARC/SunOS) using a C compiler which invokes Sun's own
231 assembler and linker. (thanks to Nikodemus Siivola)
232 * Unbound, undefined, undeclared variables now trigger full
233 WARNINGs, not just STYLE-WARNINGs, on the assumption that this is
234 more often programmer error than deliberate exploitation of undefined
236 * optimization: the hash algorithm for strings has changed to one
237 that is less vulnerable to spurious collisions. (thanks to Juho
239 * optimization: VECTOR-POP, VECTOR-PUSH-EXTEND and REPLACE do less
240 needless bounds checking. (thanks to Juho Snellman)
241 * optimization: implemented multiplication as a modular
242 (UNSIGNED-BYTE 32) operation on the PPC backend.
243 * fixed some bugs revealed by Paul Dietz' test suite:
244 ** ADJUST-ARRAY now copies the datum in a zero rank array if
246 ** ADJUST-ARRAY no longer adjusts non-adjustable arrays.
247 ** MAKE-STRING-INPUT-STREAM accepts NIL as a value for :END.
248 ** MAKE-STRING-INPUT-STREAM functions correctly for strings with
250 ** CLEAR-INPUT accepts NIL and T for its (optional) stream
252 ** Ratios can now be printed correctly with *PRINT-BASE* bound to
254 ** ECHO-STREAMs no longer attempt to echo the end of file value to
255 their output stream on EOF from read.
256 ** CONCATENATED-STREAM-STREAMS discards constituent streams which
257 have been read to end-of-file.
258 ** CLOSE works as expected on the null CONCATENATED-STREAM, and on
260 ** Printing symbols with *PRINT-CASE* :CAPITALIZE respects the
261 description of determination of which consecutive characters
263 ** Printing the "Space" character with escaping on now yields "#\\ ",
264 rather than "#\\Space", as mandated by ANSI 22.1.3.2.
265 ** Reading floating-point numbers with *READ-BASE* set to a number
266 less than 10 works correctly.
267 ** Reading floating-point numbers with *READ-BASE* set to a number
268 more than 10 works correctly.
269 ** Printing with *PRINT-READABLY* targets the standard readtable, not
270 the readtable currently in effect.
272 changes in sbcl-0.8.8 relative to sbcl-0.8.7:
273 * minor incompatible change: parsing of namestrings on a physical
274 (Unix) host has changed; numbers after the final #\. in a
275 namestring are no longer interpreted as a version field. This is
276 intented to be largely invisible to the user, except that the
277 meaning of the namestring "*.*.*" has changed: it now refers to a
278 pathname with :TYPE :WILD :NAME #<pattern "*.*">. This namestring
279 should usually be replaced by
280 (make-pathname :name :wild :type :wild :version :wild)
281 with the added benefit that this is more likely to be portable.
282 As a consequence of this change, the :IF-EXISTS :NEW-VERSION
283 option to OPEN now signals an error if the file being opened
284 exists; this may have an impact on existing code.
285 * fixed bug 190: RUN-PROGRAM should now work properly, respecting
286 signals received, on the PowerPC platforms (both Linux and
287 Darwin). (thanks to Pierre Mai for pointing out the location of
289 * several fixes on OS X: The system now builds and runs cleanly on
290 Panther (10.3), and works around sigreturn bug (no more SIGFPEs).
291 (thanks to Brian Mastenbrook)
292 * bug fix: DECODE-UNIVERSAL-TIME now accepts timezone arguments with
293 second-resolution: integer multiples of 1/3600 between -24 and 24.
294 (thanks to Vincent Arkesteijn)
295 * bug fix: functions =, /=, <, <=, >, >= did not check the argument
296 type when called with 1 argument; PEEK-CHAR checked type of
297 PEEK-TYPE only after having read first character from a
298 stream. (reported by Peter Graves)
299 * bug fix: the garbage collector now has much better locality
300 behaviour, and in particular no longer treats all memory as being
301 exhausted when many small objects point to each other in a deeply
303 * bug fix: arrays specialized on (UNSIGNED-BYTE 15) are now
304 recognized as being TYPEP their class.
305 * bug fix: the PUSHNEW documentation string has been corrected.
306 (thanks to Vincent Arkesteijn)
307 * bug fix: defaulting of the value for the last of an atypically
308 large number of multiple values being bound was not being
309 performed correctly on the Alpha or PPC platforms
310 * optimization: implemented multiplication as a modular
311 (UNSIGNED-BYTE 32) operation on the x86 backend.
312 * optimization: SEARCH on simple-base-strings can now be open-coded.
313 (see also contrib/compiler-extras.lisp for inspiration for
314 teaching the compiler about the Boyer-Moore algorithm).
315 * value, returned by MAX (and MIN) called with several EQUALP, but
316 not EQL, arguments now does not depend on compiler settings.
317 * fixed some bugs revealed by Paul Dietz' test suite:
318 ** in stack analysis liveness information is propagated from
319 non-local entry points.
320 ** pathwise CAST removing failed when the CAST node did not start
322 ** INPUT-STREAM-P, OUTPUT-STREAM-P, STREAM-ELEMENT-TYPE and
323 OPEN-STREAM-P signal a TYPE-ERROR if their argument is not a
325 ** LOAD-LOGICAL-PATHNAME-TRANSLATIONS returns NIL if the logical
326 host is already defined.
327 ** RENAME-FILE works on streams instead of signalling an internal
329 ** PEEK-CHAR uses the current readtable when determining whether
330 or not a character is whitespace.
331 ** MERGE-PATHNAMES handles the case when the pathname does not
332 specify a name while the default-pathname specifies a version.
333 ** Pathnames now stand a better chance of respecting print/read
335 ** Attempting to use standardized file system operators with a
336 pathname with invalid :DIRECTORY components signals a
338 ** OPEN :DIRECTION :IO no longer fails to work on non-existent
340 ** DIRECTORY on logical pathnames is more correct.
341 ** CLEAR-INPUT, CLEAR-OUTPUT, FINISH-OUTPUT and FORCE-OUTPUT
342 signal a TYPE-ERROR if their argument is not a stream.
343 ** READ-BYTE and WRITE-BYTE signal a TYPE-ERROR if their stream
344 designator argument does not designate a stream.
345 ** OPEN-STREAM-P and INPUT-STREAM-P on synonym streams work by
346 examining the synonym.
347 ** STREAM-ELEMENT-TYPE and FRESH-LINE on broadcast-streams now
349 ** OPEN and WITH-OPEN-STREAM allow opening streams with
350 element-type larger than ([UN]SIGNED-BYTE 32).
352 changes in sbcl-0.8.7 relative to sbcl-0.8.6:
353 * When built with the :SB-FUTEX feature, threaded builds now take
354 advantage of the "fast userspace mutex" facility in Linux kernel 2.6
355 for faster/more reliable mutex and condition variable support.
356 * Incompatible change (but one you probably shouldn't have been using
357 anyway): the interface and code for arbitrating between multiple
358 threads in the same user session has been redesigned.
359 * bug fix: GET-SETF-EXPANSION no longer throws an internal type
360 error when called without an explicit environment argument.
361 (thanks to Nikodemus Siivola)
362 * bug fix: buffered :DIRECTION :IO streams are less likely to become
363 confused about their position. (thanks to Adam Warner and Gerd
365 * bug fix: Pretty printing backquoted forms with unquotations in the
366 argument list position of various code constructs such as LAMBDA
367 now works correctly. (reported by Paul Dietz)
368 * bug fix: Pretty printing unquotations no longer loses all
369 stream position information.
370 * optimization: performance of string output streams is now less
371 poor for multiple small sequence writes.
372 * optimization: performance of CSUBTYPEP in the presence of complex
373 expressions involving CONS and NOT many times has been improved.
374 (reported by Paul Dietz)
375 * ASDF-INSTALL bug fix: now parses *PROXY* properly. (thanks to
377 * SB-SIMPLE-STREAMS enhancement: simple-streams can now be used as
378 streams for the REPL, for the debugger, and so on. (thanks to
380 * DEFINE-CODITION is more efficient. (thanks to Brian Mastenbrook)
381 * fixed some bugs revealed by Paul Dietz' test suite:
382 ** the value of the :REHASH-THRESHOLD argument to MAKE-HASH-TABLE
383 is ignored if it is too small, rather than propagating through
384 to cause DIVIDE-BY-ZERO or FLOATING-POINT-OVERFLOW errors.
385 ** extremely complex negations of CONS types were not being
386 sufficiently canonicalized, leading to inconsistencies in
388 ** VALUES tranformer lost derived type.
390 changes in sbcl-0.8.6 relative to sbcl-0.8.5:
391 * fixed a bootstrapping bug: the build process no longer assumes
392 that the various BOOLE-related constants have the same value in
393 host and target lisps. (noted by Paul Dietz' test suite on an
394 SBCL binary built from CLISP)
395 * The system can now be dynamically linked on the MIPS platform,
396 which enables dynamic loading of foreign code from Lisp. (thanks
397 to Ralf Baechle for discussions on the MIPS ABI)
398 * The system now records debugging information for its own source
399 files in a filesystem-position-independent manner, relative to
400 the "SYS" logical host.
401 * fixed a compiler bug: MV-LET convertion did not check references
402 to the "max args" entry point. (reported by Brian Downing)
403 * tweaked disassembly notes to be less confident about proclaiming
404 some instruction as an LRA. (thanks to Brian Downing)
405 * contrib update: SB-ACLREPL is now threadsafe; multiple listeners
406 now each have their own history, command character, and other
407 characteristics. (thanks to David Lichteblau)
408 * fixed some bugs revealed by Paul Dietz' test suite:
409 ** compiler failure in compiling LOGAND expressions including a
411 ** Implementation of ASH-MOD32 on X86 and PPC did not work for the
412 shift greater than 32.
413 ** FLUSH-DEST did not mark blocks for type check regeneration.
414 ** HANDLER-CASE failed to accept declarations in handler clauses
415 in some circumstances.
417 changes in sbcl-0.8.5 relative to sbcl-0.8.4:
418 * New code in contrib/sb-introspect (still probably not entirely
419 stable yet) provides some support for smart Lisp development
420 environments like SLIME.
421 * The conditions signalled for errors occurring when loading .fasl
422 files have been systematized (inheriting from SB-EXT:INVALID-FASL)
423 in a way which should help ASDF recover gracefully.
424 * The REQUIRE/PROVIDE behavior of *MODULE-PROVIDER-FUNCTIONS*
425 stuff has been cleaned up. If you code contrib/ stuff, this might
426 affect you, and you can look at contrib/README, contrib/STANDARDS,
427 and/or the 0.8.4.27 diff to check.
428 * In full calls the compiler now does not generate checks for declared
429 argument types for all arguments.
430 * various threading fixes
431 ** and some experimental patches which didn't make it into
432 the main tree for this release, but which are shipped in
433 contrib/experimental-thread.patch as a possible fix for some
434 failures (deadlock, spinning...) in GC-intensive multithreaded
436 * fixed PPC build problem (source code incompatibility of different
437 library versions): added offsetof() hackery which attempts to divine
438 where glibc maintainers put uc_mcontext today
439 * fixed bug 282: compiler does not trust type assertions while passing
440 arguments to a full call.
441 * fixed bug 261: compiler allows NIL or "no value" to be accepted for
442 &OPTIONAL VALUES type parameter.
443 * fix bug 214: algorithm for noting rejected templates is now more
444 similar to that of template seletion. (also reported by rydis on
446 * fixed bug 141b: printing backquoted information readably and prettily
447 inserts a space where necessary.
448 * bug fix: obviously wrong type specifiers such as (FIXNUM 1) or
449 (CHARACTER 10) are now reported as errors, rather than propagated
450 as unknown types. (reported by piso on #lisp)
451 * bug fix: the :IF-EXISTS argument to OPEN now behaves correctly
452 with values NIL and :ERROR. (thanks to Milan Zamazal)
453 * fixed bug 191c: CLOS now does proper keyword argument checking as
454 described in CLHS 7.6.5 and 7.6.5.1.
455 * bug fix: LOOP forms using NIL as a for-as-arithmetic counter no
456 longer raise an error; further, using a list as a for-as-arithmetic
457 counter now raises a meaningful error.
458 * fixed bug 213a: even fairly unreasonable CONS type specifiers are
459 now understood by sequence creation functions such as MAKE-SEQUENCE
461 * fixed bug 46k: READ-BYTE now signals an error when asked to read from
462 a STRING-INPUT-STREAM.
463 * compiler enhancement: SIGNUM is now better able to derive the type
465 * type declarations inside WITH-SLOTS are checked. (reported by
467 * fixed some bugs revealed by Paul Dietz' test suite:
468 ** incorrect optimization of TRUNCATE for a positive first
469 argument and negative second.
470 ** compiler failure in let-convertion during flushing dead code.
471 ** compiler failure while deriving type of TRUNCATE on an
472 interval, containing 0.
473 ** ASH of a negative bignum by a negative bignum count now returns
475 ** intersection of CONS types now canonicalizes properly, fixing
476 inconsistencies in SUBTYPEP.
478 changes in sbcl-0.8.4 relative to sbcl-0.8.3:
479 * incompatible change: The --disable-debugger command line
480 option now clobbers the debugger at a more fundamental
481 level, by redefining #'INVOKE-DEBUGGER instead of by
482 rebinding *DEBUGGER-HOOK*. The main difference is that BREAK
483 is specified by ANSI to ignore *DEBUGGER-HOOK* and
484 INVOKE-DEBUGGER regardless. Under the old system, BREAK would
485 enter the debugger REPL and then suffer recursive errors
486 because *DEBUG-IO* is also messed up in --disable-debugger mode;
487 while under the new system, BREAK in --disable-debugger mode
488 terminates the system just as an unhandled error would.
489 * fixed compiler performance when processing loops with a step >1;
490 * bug fix: DOCUMENTATION now retrieves generic function
491 documentation. Also, DOCUMENTATION and (SETF DOCUMENTATION)
492 support has been systematized, and now supports the methods
493 specified by ANSI, along with a default method and a method for
494 slot documentation. (reported by Nathan Froyd)
495 * bug fix: effective methods associated with a generic function are
496 no longer cached over a change of that generic function's method
497 combination. (reported by Andreas Fuchs)
498 * bug fix: RUN-PROGRAM now does not fail if some element in $PATH
499 names a non-existent directory. (thanks to Andreas Fuchs)
500 * bug fix: ROUND and TRUNCATE could, under certain circumstances on
501 the PPC platform, lead to stack corruption; this has been fixed.
502 (reported by Rainer Joswig)
503 * bug fix: ASH on an (UNSIGNED-BYTE 32) with a shift of -32 or lower
504 no longer ever returns 1 instead of 0. (thanks to Lars Brinkhoff)
505 * fixed bug 285: TRUNCATE on bignum arguments, and indeed bignum
506 arithmetic in general, is now much more reliable on the PPC
508 * bug fix: LOGCOUNT on (UNSIGNED-BYTE 64) objects on the Alpha
509 platform now returns the right answer.
510 * optimization: restored some effective method precomputation in
511 CLOS (turned off by an ANSI fix in sbcl-0.8.3); the amount of
512 precomputation is now tunable.
513 * optimization: compiler-internal data structure use has been
514 reviewed, and changes have been made that should improve the
515 performance of the compiler by about 20%.
516 * optimization: performance of FILL (and :INITIAL-ELEMENT) on
517 simple-base-strings and simple-bit-vectors is improved.
518 * optimization: the optimization of 32-bit logical and arithmetic
519 functions introduced in version 0.8.3 on the x86 has been
520 implemented on the mips, ppc and sparc platforms; an
521 implementation of the same facility, but for 64-bit arithmetic,
522 has been added for the alpha.
523 * microoptimization: the compiler is better able to make use of the
524 x86 LEA instruction for multiplication by constants.
525 * bug fix: in some situations compiler did not report usage of
526 generic arithmetic in (SPEED 3) policy.
527 * bug 145b fix: compiler used wrong type specifier while converting
528 MEMBER-types to numeric.
529 * bug fix: COMPILE-FILE must bind *READTABLE*. (reported by Doug
531 * bug fix: (SETF AREF) on byte-sized-element arrays with constant
532 index argument now works properly on the Alpha platform.
533 * bug fix: floating point exception treatment on the Alpha platform
535 * bug fix: FILE-POSITION works much better on string input and
536 output streams. (thanks to Nikodemus Siivola)
537 * bug fix: many threading/garbage collection symptoms sorted.
538 SB-THREAD:INTERRUPT-THREAD now safe to call on a thread that
539 might be pseudo-atomic.
540 * internal change: Stopping for GC is now done with signals not
541 ptrace. GC is now done in whichever thread wanted it, instead of
543 * bug fix: GC hooks (missing since 0.8) reinstated, so finalizers
545 * bug fix: result form in DO is not contained in the implicit
547 * incompatible change: ICR structure is changed; the value part of
548 CONTINUATION is now called LVAR; corresponding functions are
549 renamed (e.g. SB-C::CONTINUATION-TYPE has become SB-C::LVAR-TYPE).
550 * added type deriver for ISQRT (thanks to Robert E. Brown).
551 * bug fix: better support for loading from the command line when an
552 initialization file sets (READTABLE-CASE *READTABLE*). (thanks
554 * fixed some bugs revealed by Paul Dietz' test suite:
555 ** the RETURN clause in LOOP is now equivalent to DO (RETURN ...).
556 ** ROUND and FROUND now give the right answer when given very
557 small float arguments.
558 ** (FLOAT X) for X of type DOUBLE-FLOAT now returns X in all
560 ** optimizer for (EXPT X 0) did not work for X not of type FLOAT.
561 ** (GCD 0 <negative-integer>) returned <negative-integer>.
562 ** LCM should return a non-negative integer.
563 ** PARSE-INTEGER returned the index of a terminator instead of the
564 upper bounding index of a substring in case :JUNK-ALLOWED NIL.
565 ** PARSE-INTEGER returned an incorrect index being applied to a
567 ** LCM with two arguments of 0 returns 0 rather than signalling
569 ** unsigned addition of a 32-bit constant with the high bit set no
570 longer causes an internal compiler error on the x86.
571 ** LOGBITP accepts a non-negative bignum as its INDEX argument.
572 ** compiler incorrectly derived types of DPB and DEPOSIT-FIELD
573 with negative last argument.
574 ** byte specifiers with zero size and position no longer cause
575 an error during type derivation.
576 ** bignum multiplication on the Alpha platform now returns the
578 * porting: The system now builds on SuSE AMD64, although it still
579 generates a 32-bit binary.
580 * .fasl file incompatibility: The fasl file version number has
581 been incremented (because of the changes to internal compiler
582 data structures referred to above).
584 changes in sbcl-0.8.3 relative to sbcl-0.8.2:
585 * SBCL now builds and runs on MacOS X (version 10.2), or perhaps
586 more accurately, on the Darwin kernel running on PowerPC hardware.
587 (thanks to Brian Mastenbrook, Pierre Mai and Patrik Nordebo)
588 * Compiler code deletion notes now signal a condition of type
589 SB-EXT:CODE-DELETION-NOTE (a subtype of SB-EXT:COMPILER-NOTE) with
590 an associated MUFFLE-WARNING restart.
591 * The compiler now performs limited argument count validation of
592 constant format strings in FORMAT, and where appropriate in ERROR,
593 CERROR and WARN. (thanks to Gerd Moellmann)
594 * New ASDF-INSTALL contrib can be used for automatic download and
595 installation of third-party Lisp code from CCLAN or other sites
597 * Threaded builds (:SB-THREAD) now support SB-THREAD:INTERRUPT-THREAD,
598 which forces another thread to execute a function supplied by the
600 * bug 75 fix: WITH-OUTPUT-TO-STRING (and MAKE-STRING-OUTPUT-STREAM)
601 now accept and act upon their :ELEMENT-TYPE keyword argument.
602 (reported by Martin Atzmueller, Edi Weitz)
603 * bug fix: FILE-POSITION now accepts position designators up to
604 ARRAY-DIMENSION-LIMIT or the extreme of the off_t range, whichever
605 is the greater. (thanks to Patrik Nordebo)
606 * bug fix: MAKE-ARRAY ignored :INITIAL-CONTENTS NIL. (reported by
607 Kalle Olavi Niemitalo)
608 * bug fix: the CLASS-PROTOTYPE of the GENERIC-FUNCTION class is now
609 printable. (reported by Eric Marsden)
610 * bug fix in sb-posix: mmap() now works on systems with a 64-bit
611 off_t, including Darwin and FreeBSD. (thanks to Andreas Fuchs)
612 * x86 bug fix in control stack exhaustion checking: now shows backtrace
613 * bug fix in WITH-TIMEOUT: now the body can have more than one form.
614 (thanks to Stig Sandoe)
615 * bug fix in READ-SEQUENCE: READ-SEQUENCE following PEEK-CHAR or
616 UNREAD-CHAR now correctly includes the unread character in the
617 target sequence. (thanks to Gerd Moellmann)
618 * bug fix in threaded builds: the system can now be suspended and
619 resumed by shell job control with minimal disruption.
620 * bug fixes in times and timezones >2038AD
621 * better handling of "where is GNU make?" problem in build scripts
622 (thanks to Nikodemus Siivola)
623 * new optimization: inside a named function any reference to a
624 function with the same name is considered to be a self-reference;
625 this behaviour is controlled with SB-C::RECOGNIZE-SELF-CALLS
626 optimization quality.
627 * new optimization on x86: logical functions and + now have
628 optimized (UNSIGNED-BYTE 32) versions, which are automatically
629 used when the result is truncated to 32 bits.
630 * VALUES declaration is partially enabled.
631 * fixes in SB-GROVEL (thanks to Andreas Fuchs)
632 * fixed some bugs revealed by Paul Dietz' test suite:
633 ** The system now obeys the constraint imposed by
634 UPGRADED-ARRAY-ELEMENT-TYPE that the upgraded array element
635 types form a lattice under type intersection.
636 ** FFLOOR, FTRUNCATE, FCEILING and FROUND work with integers.
637 ** ASSOC now ignores NIL elements in an alist.
638 ** CEILING now gives the right answer with MOST-NEGATIVE-FIXNUM
639 and (1+ MOST-POSITIVE-FIXNUM) answers.
640 ** The addition of a method with invalid qualifiers to a generic
641 function does not cause an error to be signalled immediately;
642 a warning is signalled, and the error is generated only on
643 calling the generic function.
644 * changed .fasl file version number, in part to add type codes for
645 new array subtypes UNSIGNED-BYTE 7, 15, 29, and 31 mandated by
646 obscure ANSI requirements
648 changes in sbcl-0.8.2 relative to sbcl-0.8.1:
649 * fixed bug 148: failure to inline-expand a local function left
650 garbage, confusing the compiler.
651 * fixed bugs 3cd: structure slot readers perform type check if the
652 slot can have an invalid value (i.e. it is either not initialized
653 or can be written with a less specific slot writer).
654 * bug fix: the compiler now traps array references to elements off
655 the end of an array; previously, the bounds checking in some
656 circumstances could go off-by-one.
657 * improved MACHINE-VERSION, especially on Linux (thanks to Lars
659 * type declarations for array element types now obey the description
660 on the CLHS page "Declaration TYPE", as per discussions on
661 sbcl-help around 2003-05-08. This means that a declaration
662 (TYPE (ARRAY FOO) BAR) means that, within the scope of the
663 declaration, all references to BAR will be asserted or assumed
664 (with THE, so dependent on compiler policy) to involve objects of
665 type FOO. Note that no such declaration is implied in
666 (MAKE-ARRAY .. :ELEMENT-TYPE 'FOO).
667 * declared types of functions from the "Conditions"
668 chapter. (reported by Paul Dietz)
669 * bug fix: CERROR accepts a function as its first argument.
670 * bug fix: NTH an NTHCDR accept a bignum as index
671 arguments. (reported by Adam Warner)
672 * optimization: character compare routines now optimize comparing
673 against a constant character. (reported by Gilbert Baumann)
674 * bug fix: (SETF AREF) on byte-sized-element arrays with constant index
675 argument now works properly on the MIPS platform.
676 * fixed compiler failure on (TYPEP x '(NOT (MEMBER 0d0))).
677 * repeated evaluation of the same DEFSTRUCT, a slot of which is
678 declared to have a functional type, does not cause an error
680 * fixed bug: sometimes MAKE-INSTANCE did not work with classes with
681 many :DEFAULT-INITARGS. (reported by Istvan Marko)
682 * fixed bug: if last continuation of a deleted block has a
683 destination, this destination should be deleted too. (reported by
685 * fixed a bug in the bootstrap process: the host compiler's values
686 of ARRAY-DIMENSION-LIMIT and ARRAY-TOTAL-SIZE-LIMIT no longer leak
687 into the newly-built SBCL. (reported by Eric Marsden on #lisp,
688 test case from Patrik Nordebo)
689 * improved the ability of the disassembler on the PPC platform to
690 provide helpful disassembly notes.
691 * SB-MOP:CLASS-PROTOTYPE on built-in-classes returns an instance of
692 the class in more cases than previously.
693 * bug fix: FILE-POSITION now understands :START and :END for
694 STRING-INPUT-STREAMs. (thanks to Nikodemus Siivola)
695 * bug fix: (SIGNED-BYTE 8) streams no longer return (UNSIGNED-BYTE
696 8) data. (thanks to David Lichteblau)
697 * bug fix: it is possible to add a method to a generic function
699 * bug fix: reader failed to signal END-OF-FILE inside an
700 object representation. (reported by Nikodemus Siivola)
701 * fixed some bugs revealed by Paul Dietz' test suite:
702 ** LAST and [N]BUTLAST should accept a bignum.
703 ** condition slot accessors are methods.
704 ** (VECTOR NIL) is a subtype of STRING.
706 changes in sbcl-0.8.1 relative to sbcl-0.8.0:
707 * minor incompatible change: some nonsensical specialized lambda
708 lists (used in DEFMETHOD) which were previously ignored now signal
710 * minor incompatible change: the system is now aware of the types of
711 variables in the COMMON-LISP package, and will signal errors for
712 most violations of these type constraints (where previously they
713 were silently accepted).
714 * minor incompatible change: COMPILE-FILE now uses the freedom
715 afforded (ANSI 3.2.2.3) to use derived function types for
716 functions defined in the same file. This also permits the system
717 to warn on static type mismatches and function
718 redefinition. (Currently it does not work with high DEBUG level.)
719 * minor incompatible change: VALUES declaration is disabled.
720 * When issuing notes, the compiler now signals a condition of type
721 SB-EXT:COMPILER-NOTE, and provides an associated MUFFLE-WARNING
722 restart for use in user handlers. It is expected that the
723 COMPILER-NOTE condition will eventually become a condition
724 supertype to a hierarchy of note types, which will then be
725 handleable in a similar fashion. However, at the moment, no such
726 note subtypes yet exist. (SB-INT:SIMPLE-COMPILER-NOTE exists,
727 but it's an implementation detail, not a classification for the
729 * Changes in type checking closed the following bugs:
730 ** type checking of unused values (192b, 194d, 203);
731 ** template selection based on unsafe type assertions (192c, 236);
732 ** type checking in branches (194bc).
733 * A short form of VALUES type specifier has ANSI meaning (it has
734 increased the number of situations when SBCL cannot perform type
736 * fixed bug in DEFSTRUCT: once again, naming structure slots with
737 keywords or constants is permissible.
738 * STREAM-READ-SEQUENCE and STREAM-WRITE-SEQUENCE now have methods
739 defined on the relevant FUNDAMENTAL-BINARY-{INPUT,OUTPUT}-STREAM
740 classes. (thanks to Antonio Martinez)
741 * improved ANSIness in DESCRIBE: The DESCRIBE function no longer
742 outputs FRESH-LINE or TERPRI, and no longer converts its stream
743 argument to a pretty-print stream. Instead, it leaves any such
744 operations to DESCRIBE-OBJECT methods.
745 * bug fix: APROPOS now respects the EXTERNAL-ONLY flag. (reported
747 * bug fix: NIL is now a valid destructuring argument in DEFMACRO
748 lambda lists. (thanks to David Lichteblau)
749 * bug fix: Defining a generic function with a :METHOD-CLASS being a
750 subclass of STANDARD-METHOD no longer causes stack exhaustion.
751 (thanks to Gerd Moellmann)
752 * fixed bug 246: increased compilation speed of long
753 MULTIPLE-VALUE-BIND (and likewise of NTH-VALUE with a constant
755 * a contributed module implementing COMPILER-LET and MACROEXPAND-ALL
757 * DEFCONSTANT now throws a condition of type
758 SB-EXT:DEFCONSTANT-UNEQL if it is being asked to redefine a
759 constant to a non-EQL value; CONTINUE and ABORT restarts
760 respectively change and preserve the value.
761 * fixed bug 63: The code walker, part of the implementation of CLOS,
762 is now better at handling symbol macros.
763 * bug fix: There is no longer an internal implementation type named
764 CL:LENGTH. (reported by Raymond Toy)
765 * bug fix: In macro-like defining macros/special operators the
766 implicit block does not enclose the lambda list.
767 * fixed bugs 10 and 43: Bare VALUES, AND, OR and MEMBER symbols (not
768 enclosed in parentheses) are not suitable as type specifiers, and
769 their use properly signals an error now.
770 * bug fix: An argument count mismatch for a type specifier in code
771 being compiled no longer causes an unhandled error at compile
772 time, but signals a compile-time warning.
773 * fixed simple vector readable printing
774 * bug fix: DESCRIBE takes more care over whether the class
775 precedence list slot of a class is bound before accessing it.
776 (reported by Markus Krummenacker)
777 * bug fix: FORMATTER can successfully compile pretty-printer format
778 strings which use variants of the ~* directive inside.
779 * bug fix: SEARCH now applies its TEST predicate to the elements of
780 the arguments in the correct order. (thanks to Wolfhard Buss)
781 * fixed bug 235b: The compiler uses return types of MAPCAR and friends
782 in type inference. (thanks to Robert E. Brown)
783 * bug fix: Reading in symbols with an explicit package name of ""
784 (e.g. '||::FOO) now works correctly. (reported by Henrik Motakef)
785 * fixed some bugs revealed by Paul Dietz' test suite:
786 ** NIL is now allowed as a structure slot name.
787 ** Arbitrary numbers, not just REALs, are allowed in certain
788 circumstances in LOOP for-as-arithmetic clauses.
789 ** Multiple class redefinitions before slot access no longer
791 ** (SETF FIND-CLASS) now accepts NIL as an argument to remove the
792 association between the name and a class.
793 ** Generic functions with non-standard method-combination and over
794 five methods all of which return constants no longer return NIL
795 after the first few invocations. (thanks to Gerd Moellmann)
796 ** CALL-NEXT-METHOD with no arguments now passes the original
797 values of the arguments, even in the presence of assignment.
798 ** Functions [N]SUBST*, LAST, NRECONC, [N]SUBLIS may return any
800 ** DISASSEMBLE works with closures and funcallable instances.
801 ** ADD-METHOD now returns the generic function, not the new method.
802 ** FIND-METHOD signals an error if the lengths of the specializers
803 is incompatible with the generic function, even if the ERRORP
805 ** TYPE-OF returns recognizeable subtypes of all built-in-types of
806 which its argument is a member.
807 ** DEFCLASS only redefines the class named by its class-name
808 argument if that name is the proper name of the class;
809 otherwise, it creates a new class.
810 ** SLOT-UNBOUND now correctly initalizes the CELL-ERROR-NAME slot
811 of the UNBOUND-SLOT condition to the name of the slot.
812 ** (SETF (AREF bv 0) ...) did not work for bit vectors.
813 ** SLOT-UNBOUND and SLOT-MISSING now have their return values
814 treated by SLOT-BOUNDP, SLOT-VALUE, (SETF SLOT-VALUE) and
815 SLOT-MAKUNBOUND in the specified fashion.
817 changes in sbcl-0.8.0 relative to sbcl-0.8alpha.0
818 * SBCL now builds using CLISP (version of late April 2003 from CVS) as
819 cross-compilation host. As a consequence, we can now bootstrap our
820 way up to SBCL starting with a bare gcc toolchain and human-readable
821 source code (first the source to CLISP, then the source to SBCL).
822 * A contributed module containing a partial implementation of the
823 simple-streams interface has been included. (thanks to Rudi
825 * A contributed module implementing the RFC1321 Message Digest
826 Algorithm, known as MD5, has been included.
827 * minor incompatible change: The :NEGATIVE-ZERO-IS-NOT-ZERO feature
828 no longer has any effect, as the code controlled by this feature
829 has been deleted. (As far as we know, no-one has ever built using
830 this feature, and its semantics were confused in any case).
831 * minor incompatible change: As a consequence of making SLOT-EXISTS-P
832 work on conditions (as required by the ANSI specification),
833 SLOT-VALUE, (SETF SLOT-VALUE) and SLOT-BOUNDP likewise have the
834 expected behaviour on conditions. Users should note, however,
835 that such behaviour is not required by the ANSI specification,
836 and so use of this behaviour may render their code unportable.
837 * fixed some bugs revealed by Paul Dietz' test suite:
838 ** the GENERIC-FUNCTION type is no longer disjoint from FUNCTION
840 ** &ENVIRONMENT parameter in macro lambda list is bound first.
841 ** SXHASH on condition objects no longer returns NIL.
842 ** :ALLOCATION :CLASS slots are better treated; their values are
843 updated on class redefinition, and initforms inherited from
844 superclasses are applied.
845 ** REMOVE-METHOD returns its generic function argument even when
846 no method was removed.
847 ** SHARED-INITIALIZE now initializes the values of the requested
848 slots, including those with :ALLOCATION :CLASS.
849 ** ALLOCATE-INSTANCE now works on structure classes defined via
850 DEFSTRUCT (and not just by those from DEFCLASS :METACLASS
852 ** SLOT-EXISTS-P now works on conditions, as well as structures
854 ** MAKE-LOAD-FORM now has the required methods on
855 STRUCTURE-OBJECT, CONDITION and STANDARD-OBJECT.
856 ** MAKE-LOAD-FORM-SAVING-SLOTS no longer returns a special
857 keyword, and now implements the SLOT-NAMES argument.
858 ** methods with &OPTIONAL arguments no longer allow too many
859 arguments to be passed in the call without error.
860 ** DEFGENERIC now checks that the :ARGUMENT-PRECEDENCE-ORDER
861 option is consistent with the required arguments of the generic
862 function lambda list.
863 * bug fix: REQUIRE accepts a string designator. (Thanks to
865 * bug fix: SB-MOP:DIRECT-SLOT-DEFINITION-CLASS and
866 SB-MOP:EFFECTIVE-SLOT-DEFINITION-CLASS now have the
867 specified-by-AMOP lambda list of (CLASS &REST INITARGS).
868 * bug fix: The compiler now checks for duplicated variables in macro
870 * bug fix: SETQ on globals returns the correct value.
871 * fixed bug 47.d: (DEFGENERIC IF (X)) now signals a PROGRAM-ERROR,
872 not a COMPILER-ERROR (followed by some other strange error on
873 choosing the CONTINUE restart).
874 * bug fix: make.sh and friends are now more consistent in the way that
875 they look for GNU "make".
877 changes in sbcl-0.8alpha.0 relative to sbcl-0.7.14
878 * experimental native threads support (on x86 Linux >=2.4 only).
879 This is not compiled in by default: you need to add :SB-THREAD to
880 the target features. See the "Beyond ANSI" chapter of the manual
882 * fix for longstanding nonANSIism: The old distinction between
883 CL:CLASS objects and SB-PCL:CLASS objects has been eliminated.
884 The return value from CL:FIND-CLASS is now a CLOS class, and
885 likewise that of CL:CLASS-OF; CL:BUILT-IN-CLASS,
886 CL:STRUCTURE-CLASS and CL:STANDARD-CLASS name CLOS classes.
887 * An interface to the MetaObject Protocol, as described in Kiczales,
888 des Rivieres and Bobrow's "The Art of the Metaobject Protocol",
889 MIT Press, 1991, is available from the SB-MOP package.
890 * incompatible change: the SB-PCL package should now be considered
891 a private implementation detail, and no longer a semi-private MOP
893 * minor incompatible change: due to rearrangement for threads, the
894 control stack and binding stack are now allocated at arbitrary
895 addresses instead of being hardcoded per-port. Users affected by
896 this probably have to be doing advanced things with shared
897 libraries, and will know who they are.
898 * minor incompatible change: Previously, all --eval forms used were
899 processed with READ before any of them were processed with EVAL.
900 Now each --eval form is processed with both READ and EVAL before
901 the next --eval form is processed. (Thus package operations like
902 sbcl --eval "(defpackage :foo)" --eval "(print 'foo::bar)" now
903 work as the user might reasonably expect.)
904 * minor incompatible change: *STANDARD-INPUT* is now only an
905 INPUT-STREAM, not a BIDIRECTIONAL-STREAM. (thanks to Antonio
907 * minor incompatible change: Y-OR-N-P is now character-oriented,
908 not line oriented. Also, YES-OR-NO-P now works without errors.
909 (thanks to Antonio Martinez)
910 * sb-aclrepl module improvements: an integrated inspector, added
911 repl features, and a bug fix to :trace command.
912 * Known functions, which cannot be open coded by the backend, are
913 considered to be able to check types of their arguments. (fixing
914 a bug report by Nathan J. Froyd)
915 * fixed a bug in computing method discriminating functions: It is
916 now possible to define methods specialized on classes which have
917 forward-referenced superclasses. (thanks to Gerd Moellmann)
918 * fixed evaluation order in optional entries (reported by Gilbert
920 * SB-MOP:ENSURE-CLASS-USING-CLASS now takes its arguments in the
921 specified-by-AMOP order of (CLASS NAME &REST ARGS &KEY).
922 * SB-MOP:COMPUTE-EFFECTIVE-SLOT-DEFINITION now takes the
923 required-by-AMOP NAME argument, as well as CLASS and
924 DIRECT-SLOT-DEFINITIONS. (thanks to Kevin Rosenberg)
925 * fixed bug 20: DEFMETHOD can define methods using names that are
926 not the proper names of classes to designate class specializers.
927 * bug fix: INTERACTIVE-STREAM-P now works on streams associated with
928 Unix file descriptors, instead of blowing up. (thanks to Antonio
930 * Garbage collection refactoring: user-visible change is that a
931 call to the GC function during WITHOUT-GCING will not do garbage
932 collection until the end of the WITHOUT-GCING. If you were doing
933 this you were probably losing anyway.
934 * fixed bug in MEMBER type: (MEMBER 0.0) is not the same as
935 (SINGLE-FLOAT 0.0 0.0), because of the existence of -0.0 which is
936 TYPEP the latter but not the former.
937 * The compiler issues a full WARNING for calls to undefined functions
938 with names from the CL package.
939 * MAP-INTO for a vector destination is open coded. (reported by
940 Brian Downing on c.l.l)
941 * bug fix: the long form of DEFINE-METHOD-COMBINATION now accepts a
942 documentation string.
943 * fixed some bugs revealed by Paul Dietz' test suite:
944 ** COPY-ALIST now signals an error if its argument is a dotted
946 ** Condition slots are now accessed more correctly in the presence
947 of multiple initargs for a given slot.
948 ** The USE-VALUE, CONTINUE and STORE-VALUE functions now correctly
949 exclude restarts of the same name associated with a different
951 ** DEFCLASS of forward-referenced classes with another
952 forward-referenced class in the superclasses list no longer
954 ** Condition slots are now initialized once each, not multiple
955 times. (thanks to Gerd Moellmann)
956 ** CONVERT-MORE-CALL failed on a lambda list (&KEY). (thanks to
958 ** &WHOLE and &REST arguments in macro lambda lists are patterns.
959 ** NSET-EXCLUSIVE-OR does not return extra elements when its
960 arguments contain duplicated elements.
961 ** RESTART-CASE understands local macros.
962 ** RESTART-CASE associates exactly its own restarts with a condition.
963 ** ENDP in safe mode checks its argument to be of type LIST.
964 ** COPY-SYMBOL in a threaded build no longer fails when the symbol
965 in question is unbound.
966 ** Optimized MAKE-INSTANCE functions no longer cause internal
967 assertion failures in the presence of duplicate initargs.
968 ** SLOT-MAKUNBOUND returns the instance acted upon, not NIL.
969 ** Side-effectful :DEFAULT-INITARGS have their side-effects
970 propagated even in the ctor optimized implementation of
972 ** :ALLOW-OTHER-KEYS NIL is now accepted in an initarg list.
974 changes in sbcl-0.7.14 relative to sbcl-0.7.13:
975 * a better implementation of SXHASH on (simple) bit vectors,
976 measured both in execution speed and in distribution of results
977 over the positive fixnums, has been installed. Likewise, a better
978 implementation of EQUAL for simple bit vectors is now available.
979 * fixed CEILING optimization for a divisor of form 2^k.
980 * fixed bug 240 (emitting extra style warnings "using the lexical
981 binding of the symbol *XXX*" for &OPTIONAL arguments). (reported
983 * fixed SXHASH, giving different results for NIL depending on type
984 declarations (SYMBOL or LIST). (thanks to Gerd Moellmann)
985 * fixed bug in DEFPARAMETER and DEFVAR: they could assign a lexical
986 variable. (found by Rolf Wester)
987 * SBCL does not ignore type declarations for special
988 variables. (reported by rif on c.l.l 2003-03-05)
989 * some bug fixes in contrib/sb-aclrepl/
990 * fixed some bugs revealed by Paul Dietz' test suite:
991 ** a bug in the CONS type specifier, whereby the CAR and CDR
992 types got intertwined, has been fixed;
993 ** the type system is now able to reason about the interaction
994 between INTEGER and RATIO types more completely;
995 ** APPEND, [N]REVERSE and NRECONC check that those their
996 arguments, which must be proper lists, are really so;
997 ** An array specialized to be unable to hold elements has been
998 implemented, as required -- yes, really -- by ANSI;
999 ** GETF and GET-PROPERTIES throw a TYPE-ERROR, not a SIMPLE-ERROR,
1000 on malformed property lists;
1002 changes in sbcl-0.7.13 relative to sbcl-0.7.12:
1003 * incompatible packaging change: in line with Unix convention,
1004 SBCL now looks for its core file in /usr/{local/,}lib/sbcl/sbcl.core
1005 if it's not in $SBCL_HOME. It also sets SBCL_HOME to match.
1006 * REQUIRE and PROVIDE are now optionally capable of doing something
1007 useful. See the documentation string for REQUIRE.
1008 * infrastructure for a managed SBCL contrib system: contributed
1009 modules in this release include:
1010 ** the ASDF system definition facility;
1011 ** an interface to the BSD Sockets API;
1012 ** an ACL-like convenience interface to the repl;
1013 (thanks to Kevin Rosenberg)
1014 ** an implementation of ROTATE-BYTE, with efficient implementation
1016 * fixed a bug in LOG, so that LOG of a rational argument near 1 now
1017 gives a closer approximation to the right answer than previously.
1018 (thanks to Raymond Toy)
1019 * fixed bug 157: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE and
1020 UPGRADED-COMPLEX-PART-TYPE now take (ignored, in all situations)
1021 optional environment arguments, as required by ANSI.
1022 * fixed bugs in other functions taking environment objects, allowing
1023 calls with an explicit NIL environment argument to be compiled
1025 * fixed bug 228: primary return values from
1026 FUNCTION-LAMBDA-EXPRESSION are either NIL or suitable for input to
1027 COMPILE or FUNCTION.
1028 * fixed a bug in DEFSTRUCT: predicates for :NAMED structures with
1029 :TYPE will no longer signal errors on innocuous objects.
1030 * fixed bug 231b: SETQ is better at respecting type declarations in
1031 the lexical environment.
1032 * fixed a bug in DEFCLASS: classes named by symbols with no or
1033 unprintable packages can now be defined.
1034 * fixed a bug in RESTART-BIND: The :TEST-FUNCTION option had been
1035 carelessly renamed to :TEST-FUN. (thanks to Robert E. Brown)
1036 * fixed compiler failure related to checking types of functions.
1037 (reported by Robert E. Brown)
1038 * the compiler is now much more consistent in its error-checking
1039 treatment of bounding index arguments to sequence functions: in
1040 (SAFETY 3) code, errors will be signalled in almost all cases if
1041 invalid sequence bounding indices are passed to functions defined
1042 by ANSI to operate on sequences.
1043 * fixed a bug in the build procedure: documentation of SBCL-specific
1044 packages is now preserved and available in the final Lisp image.
1045 * lifted FDEFINITION lookup out of loops in the implementation of
1046 many list operations. (thanks to Robert E. Brown)
1047 * fixed a bug in the reader: the #n# reader macro now works for
1048 objects of type STANDARD-OBJECT. (reported by Tony Martinez)
1049 * the compiler is now aware that SYMBOL-FUNCTION returns a FUNCTION
1050 and that READ-DELIMITED-LIST returns a LIST. (thanks to Robert
1051 E. Brown and Tony Martinez respectively)
1052 * PCL is now smarter about SLOT-VALUE, (SETF SLOT-VALUE) and
1053 SLOT-BOUNDP: in particular, it is now able to optimize them much
1054 better, and is now not vulnerable to having packages renamed.
1055 Furthermore, a compliance bug has been fixed: SLOT-MISSING is now
1056 always called when a slot is not present in an instance. (thanks
1058 * fixed a bug related to CONCATENATED-STREAMs: PEEK-CHAR will no
1059 longer signal an error on unreading a character following EOF on
1060 the previous constituent stream. (thanks to Tony Martinez)
1061 * fixed some bugs revealed by Paul Dietz' test suite:
1062 ** ARRAY-IN-BOUNDS-P now allows arbitrary integers as arguments,
1063 not just nonnegative fixnums;
1064 ** the logical bit-array operators such as BIT-AND now accept an
1065 explicit NIL for their "opt-arg" argument (to indicate a
1066 freshly-consed result bit-array);
1067 ** ELT now signals an error on an invalid sequence index in safe
1069 ** the type system is now cleverer about negations of numeric
1070 types, and consequently understands the BIGNUM and RATIO types
1072 ** the type system is now cleverer about the interaction between
1073 INTEGER and RATIO types: while bugs still remain, many more
1074 cases are accurately computed;
1075 ** in TYPECASE, OTHERWISE now only introduces an otherwise-clause
1076 if it is in the last clause;
1077 ** CONSTANTLY now correctly returns a side-effect-free function in
1079 ** DECLARE is no longer treated as a special-operator; in
1080 particular, SPECIAL-OPERATOR-P no longer returns T for DECLARE;
1081 * incremented fasl file version number due to the change in the
1082 DEFSTRUCT-SLOT-DESCRIPTION structure.
1084 changes in sbcl-0.7.12 relative to sbcl-0.7.11:
1085 * minor incompatible change: code processed by the "interpreter" or
1086 EVAL now has a compilation optimization policy of (DEBUG 2)
1087 (changed from (DEBUG 1)) to improve debuggability of interactive
1088 development, and to allow the use of the debug RETURN command in
1090 * an experimental implementation of the RETURN command for the
1091 debugger has been included. (thanks to Frederik Kuivinen)
1092 * fixed bug 62: constraints were not propagated into a loop.
1093 * fixed bug in embedded calls of SORT (reported and investigated by
1095 * fixed some bugs revealed by Paul Dietz' test suite:
1096 ** printing and reading of arrays with some dimensions having
1097 length 0 (thanks to Gerd Moellmann);
1098 ** BOA constructor with &AUX argument without a default value does
1099 not cause a type error;
1100 ** CONSTANTP now returns true for all self-evaluating objects.
1102 changes in sbcl-0.7.11 relative to sbcl-0.7.10:
1103 * fixed bug 127: DEFSTRUCT now does not clobber old structure
1104 accessors that are related by inheritance, as specified in the
1105 :CONC-NAME section of the specification of DEFSTRUCT. (thanks to
1106 Valtteri Vuorikoski)
1107 * The compiler is now able to inline functions that were defined in
1108 a complex lexical environment (e.g. inside a MACROLET).
1109 * fixed bug in DESCRIBE, which now works on rank-0 arrays. (thanks
1111 * Support for the upcoming FreeBSD-5.0 release has been included.
1112 (thanks to Dag-Erling Smorgrav)
1113 * fixed bug 219: DEFINE-COMPILER-MACRO no longer has compile-time
1114 effect when it is not in a toplevel context.
1115 * fixed bug 222: DEFMETHOD and SYMBOL-MACROLET interactions now
1116 stand a better chance of being correct. (thanks to Gerd
1118 * fixed bug in COERCE, which now signals an error on coercing a
1119 rational to a bounded real type which excludes the expected
1121 * The compiler is now able to derive types more accurately from the
1122 COERCE and COMPILE functions.
1123 * fixed bug 223: functional binding is considered to be constant
1124 only for symbols in the CL package.
1125 * fixed bug 231: SETQ did not check the type of a variable being set
1126 (reported by Robert E. Brown)
1127 * A new optimization for MAKE-INSTANCE has been included, fixing
1128 various bugs (including relating to :ALLOCATION :CLASS slots and
1129 :DEFAULT-INITARGS over-eager evalueation). (thanks to Gerd
1131 * fixed some LOOP bugs revealed by Paul Dietz' test suite:
1132 ** As required by ANSI, LOOP now disallows anonymous collection
1133 clauses such as COLLECT I in conjunction with aggregate boolean
1134 clauses such as THEREIS (= I 1);
1135 ** LOOP now signals an error when any variable is reused in the
1136 same loop (including the potentially useful construct analogous
1137 to WITH A = 1 WITH A = (1+ A);
1138 ** IT is only a special loop symbol within the first clause of a
1139 conditional loop clause;
1140 ** LOOP with a typed iteration variable over a hashtable now
1141 signals a type error iff it should.
1142 * fixed some other bugs revealed by Paul Dietz' test suite:
1143 ** FILE-STREAM now names the class previously known as FD-STREAM;
1144 ** in DEFSTRUCT, a bare :CONC-NAME (or a :CONC-NAME with no
1145 argument) no longer signals an error;
1146 ** likewise in DEFSTRUCT, :CONC-NAME NIL now respects the package
1147 of the slot symbol, rather than using the current package
1148 ((:CONC-NAME "") continues to intern the slot's name in the
1150 * incremented fasl file version number, because of the incompatible
1151 change to the DEFSTRUCT-DESCRIPTION structure, and again because
1152 of the new implementation of DEFINE-COMPILER-MACRO.
1154 changes in sbcl-0.7.10 relative to sbcl-0.7.9:
1155 * Support for building SBCL for MIPS platforms running in
1156 little-endian mode has now been checked in, and basic
1157 functionality on said platforms verified.
1158 * minor incompatible change: PCL now records the pathname of a file
1159 in which methods and the like are defined, rather than its
1161 * minor incompatible change: TRUENAME now considers the truename of
1162 a file naming a directory to be the pathname with :DIRECTORY
1163 component indicating that directory.
1164 * minor incompatible change: a NAMED clause in the extended form of
1165 LOOP no longer causes a BLOCK named NIL to surround the LOOP. The
1166 reason for the previous behaviour is unclear.
1167 * more systematization and improvement of CLOS and MOP conformance
1168 in PCL (thanks to Gerd Moellman and Pierre Mai):
1169 ** the standard ANSI CL generic function NO-NEXT-METHOD is now
1171 ** DEFINE-METHOD-COMBINATION no longer signals an error for
1172 primary methods with no specializers;
1173 ** the MOP generic function GENERIC-FUNCTION-DECLARATIONS is now
1175 ** the Readers for Class Metaobjects methods CLASS-DIRECT-SLOTS
1176 and CLASS-DIRECT-DEFAULT-INITARGS have been implemented for
1177 FORWARD-REFERENCED-CLASSes; error reporting on
1178 CLASS-DEFAULT-INITARGS, CLASS-PRECEDENCE-LIST and CLASS-SLOTS
1180 ** SXHASH on CLOS instances now uses a slot internal to the
1181 instance to return different numbers on distinct instances,
1182 while preserving the same return value through invocations of
1184 ** DEFMETHOD signals errors when methods with longer incongruent
1185 lambda lists are added to generic functions;
1186 ** COMPUTE-CLASS-PRECEDENCE-LIST now has a method specialized on
1187 CLASS, as specified in AMOP;
1188 ** COMPUTE-SLOTS :AROUND now assigns locations sequentially based
1189 on the order returned by the primary method for classes of
1190 class STANDARD-CLASS;
1191 ** DEFINE-METHOD-COMBINATION now works with the :ARGUMENTS option.
1192 * fixed some bugs shown by Paul Dietz' test suite:
1193 ** DOLIST puts its body in TAGBODY;
1194 ** SET-EXCLUSIVE-OR sends arguments to :TEST function in the
1196 ** MULTIPLE-VALUE-SETQ evaluates side-effectful places before
1197 value producing form;
1198 ** if more variables are given to PROGV than values, extra
1199 variables are bound and made to have no value;
1200 ** NSUBSTITUTE on list arguments gets the right answer with
1202 ** ELT signals an error of type TYPE-ERROR when the index argument
1203 is not a valid sequence index;
1204 ** LOOP signals (at macroexpansion time) an error of type
1205 PROGRAM-ERROR when duplicate variable names are found;
1206 ** LOOP supports DOWNTO and ABOVE properly; (thanks to Matthew Danish)
1207 ** FUNCALL of special-operators now cause an error of type
1209 ** PSETQ now works as required in the presence of side-effecting
1210 symbol-macro places;
1211 ** NCONC accepts any object as its last argument;
1212 ** :COUNT argument to sequence functions may be BIGNUM; (thanks to
1214 ** loop-for-as-package does not require a package to be explicitely
1216 ** LOOP WITH now treats NIL in the d-var-spec correctly as an
1218 * fixed bug 166: compiler preserves "there is a way to go"
1219 invariant when deleting code.
1220 * fixed bug 172: macro lambda lists with required arguments after
1221 &REST arguments now cause an error to be signalled. (thanks to
1223 * fixed Entomotomy PEEK-CHAR-WRONGLY-ECHOS-TO-ECHO-STREAM
1224 bug. (thanks to Matthew Danish)
1225 * fixed bug 225: STRING-STREAM is now a class. (reported by Gilbert
1227 * fixed bug 136: CALL-NEXT-METHOD no longer gets confused when
1228 arguments are lexically rebound. (thanks to Gerd Moellmann and
1230 * fixed bug 194: error messages are now more informative when there
1231 is no primary method applicable in a call to a generic
1232 function. (thanks to Gerd Moellmann)
1233 * fixed bug in command line argument checking (thanks to Julian
1235 * fixed bug in COUNT-IF, making it handle :FROM-END correctly
1236 (thanks to Matthew Danish)
1237 * incremented fasl file version number, because of the
1238 SXHASH-related changes in the layout of CLOS data structures
1240 changes in sbcl-0.7.9 relative to sbcl-0.7.8:
1241 * minor incompatible change: The runtime (the Unix executable named
1242 "sbcl") is now much pickier about the .core files it will load.
1243 Essentially it now requires .core files to descend from the same
1244 build (not just the same sources or LISP-IMPLEMENTATION-VERSION)
1245 as the runtime does. (The intent is to prevent the crashes which
1246 can occur, and which can even be reported as mysterious failures,
1247 when people patch the sources or change the build parameters
1248 without changing LISP-IMPLEMENTATION-VERSION, then mix and match
1249 sbcl and .core files.)
1250 * fixed bug: VALUES-LIST is no longer optimized away.
1251 * fixed bug 142: The FFI conversion of C string values to Lisp
1252 string values no longer conses excessively. (thanks to Nathan
1253 Froyd porting Raymond Toy's fix to CMU CL)
1254 * began to systematize and improve MOP conformance in PCL (thanks to
1255 Nathan Froyd, Gerd Moellman and Pierre Mai):
1256 ** SLOT-DEFINITION-ALLOCATION now returns :CLASS, not the class
1258 ** GENERIC-FUNCTION-ARGUMENT-PRECEDENCE-ORDER is now implemented;
1259 ** FINALIZE-INHERITANCE is now called on class finalization;
1260 ** DOCUMENTATION and (SETF DOCUMENTATION) now have the correct
1261 argument precedence order.
1262 * fixed bug 202: The compiler no longer fails on functions whose
1263 derived types contradict their declared type.
1264 * DEFMACRO is implemented via EVAL-WHEN instead of IR1 translation,
1265 so it can be non-toplevel.
1266 * The fasl file version number has changed (because of the new
1267 implementation of DEFMACRO).
1268 * (mostly) fixed bugs 46b and 46c: sequence functions now check, in
1269 safe code, that any length requirement by their type-specifier
1270 argument is valid. The exceptions to this are described in bug
1272 * fixed bugs 46h and 46i: TWO-WAY- and CONCATENATED-STREAM creation
1273 functions now check the types of their inputs as required by ANSI.
1274 * fixed bug 48c: SYMBOL-MACROLET signals PROGRAM-ERROR when an
1275 introduced symbol is DECLAREd to be SPECIAL.
1276 * fixed reading of (COMPLEX DOUBLE-FLOAT) literals from fasl files
1277 * fixed bug: :COUNT argument to sequence functions may be negative
1278 * fixed bug: body of DO-SYMBOLS may contain declarations
1279 * fixed bug: PUSHNEW now evaluates its arguments from left to right
1280 (reported by Paul F. Dietz, fixed by Gerd Moellman)
1281 * fixed bug: PUSH, PUSHNEW and POP now evaluate a place given by a
1282 symbol macro only once
1283 * fixed printing of call frame when argument list is unavailable
1284 * fixed bug: :ALLOW-OTHER-KEYS is an allowed keyword name
1285 * compiler no longer signals WARNING on unknown keyword
1288 changes in sbcl-0.7.8 relative to sbcl-0.7.7:
1289 * A beta-quality port to the mips architecture running Linux,
1290 based on the old CMUCL backend, has been made. It has been tested
1291 on a big-endian kernel, and works sufficiently well to be able to
1292 rebuild itself; it has not been tested in little-endian mode.
1293 * fixed an inconsistency between gencgc.c and purify.c which made
1294 dumping/loading .core files unreliable
1295 * fixed bug 120a: The compiler now deals correctly with IFs where
1296 the consequent is the same as the alternative, instead of
1297 misderiving the return type. (thanks to Alexey Dejneka)
1298 * fixed bug 113: Logical pathnames are now dumpable (the logical
1299 host is resolved at load-time, throwing an error if it is not
1301 * fixed bug 174: FORMAT's error message is slightly clearer when a
1302 non-printing character is used in a format directive.
1303 * fixed several bugs in compiler checking of type declarations, i.e.
1304 violations of the Python "declarations are assertions" principle
1305 (thanks to Alexey Dejneka)
1306 * fixed several bugs in PCL's error checking (thanks to Gerd
1308 * fixed bug: printing of FILE-ERROR (thanks to Antonio
1310 * fixed bug in compilation of functions as first class values
1311 (thanks to Antonio Martinez-Shotton)
1312 * The compiler's handling TYPE-ERRORs which it can prove will
1313 inevitably happen at runtime has been cleaned up and corrected
1314 in several ways. (thanks to Alexey Dejneka)
1315 * improved argument type checking for various basic arithmetic
1316 operations (MAX, +, LOGXOR, etc.) which have had so much TLC
1317 lavished on them in the past that they can be compiled in many
1318 ways in different special cases
1319 * fixed bug 181: compiler checks validity of user supplied type
1321 * cleaned up code flushing in optimization: Function calls which
1322 should signal errors for safety purposes (e.g. which ANSI says
1323 should signal errors when their arguments are of incorrect type)
1324 are no longer optimized away.
1325 * added new extension: SB-DEBUG:BACKTRACE-AS-LIST
1326 * incremented fasl file version number, because changes in the
1327 implementation of sequence functions like COERCE caused
1328 internal utility functions like COERCE-TO-SIMPLE-VECTOR (used
1329 in old inline expansions) to become undefined. (Actually these
1330 changes were later undone, so we might very well be binary
1331 compatible with 0.7.7 after all, but leaving the version number
1332 incremented seemed like the simplest and most conservative
1335 changes in sbcl-0.7.7 relative to sbcl-0.7.6:
1336 * An alpha-quality port to the parisc architecture running Linux,
1337 based on the old CMUCL backend, has been made. This, even more so
1338 than the other backends, should be considered still a work in
1339 progress; known problems include that the Linux kernel in 64-bit
1340 mode does not propagate the correct sigcontext structure to
1341 userspace, and consequently SBCL on a parisc64 kernel will not
1343 * fixed bug 189: The compiler now respects NOTINLINE declarations for
1344 functions declared in FLET and LABELS. (I.e. "LET conversion" is
1345 suppressed.) Also now that the compiler is looking at declarations
1346 in the environment, it checks optimization declarations as well,
1347 and suppresses inlining when (> DEBUG SPEED).
1348 * More fixes have been made to treatment of floating point exception
1349 treatment and other Unix signals. In particular, floating point
1350 exceptions no longer cause Bus errors on the SPARC/Linux platform.
1351 * The detection and handling of control stack exhaustion (infinite
1352 or very deeply nested recursion) has changed. Stack exhaustion
1353 detection is now done by write-protecting pages at the OS level
1354 and applies at all optimization settings; when found, a
1355 SB-KERNEL:CONTROL-STACK-EXHAUSTED condition (subclass of
1356 STORAGE-CONDITION) is signalled, so stack exhaustion can no longer
1357 be caught using IGNORE-ERRORS.
1358 * Bugs 65, 70, and 109 fixed: The compiler now preserves invariants
1359 correctly when transforming recursive LABELS functions to LETs.
1360 (thanks to Alexey Dejneka)
1361 * Bug 48a./b. fixed: SYMBOL-MACROLET now refuses to bind symbols
1362 that are names of constants or global variables.
1363 * Bug fix: DEFINE-ALIEN-ROUTINE now declaims the correct FTYPE for
1364 alien routines with docstrings.
1365 * Bug 184 fixed: Division of ratios by the integer 0 now signals an
1366 error of type DIVISION-BY-ZERO. (thanks to Wolfhard Buss and
1368 * Bug fix: Errors in PARSE-INTEGER are now of type PARSE-ERROR.
1369 (thanks to Eric Marsden)
1370 * Bug fix: COERCE to (COMPLEX FLOAT) of rationals now returns an
1371 object of type (COMPLEX FLOAT). (thanks to Wolfhard Buss)
1372 * Bug fix: The SPARC backend can now compile functions involving
1373 LOGAND and stack-allocated arguments. (thanks to Raymond Toy)
1374 * Bug fix: We no longer segfault on passing a non-FILE-STREAM stream
1375 to a functions expecting a PATHNAME-DESIGNATOR.
1376 * Bug fix: DEFGENERIC now enforces the ANSI restrictions on its
1377 lambda lists. (thanks to Alexey Dejneka)
1378 * Bug fix: changed encoding of PCL's internal MAKE-INSTANCE
1379 functions so that EXPORTing the name of the class doesn't cause
1380 MAKE-INSTANCE functions from earlier DEFCLASSes to get lost (thanks
1381 to Antonio Martinez for reporting this)
1382 * Bug 192 fixed: The internal primitive DATA-VECTOR-REF can now be
1383 constant-folded without failing an assertion. (thanks to Einar
1384 Floystad Dorum for reporting this)
1385 * Bugs 123 and 165 fixed: array specializations on as-yet-undefined
1386 types are now dealt with more correctly by the compiler.
1387 * Minor incompatible change: COMPILE-FILE-PATHNAME now merges its
1388 OUTPUT-FILE argument with its INPUT-FILE argument, resulting in
1389 behaviour analogous to RENAME-FILE. This puts its behaviour more
1390 in line with ANSI's wording on COMPILE-FILE-PATHNAME. (thanks to
1392 * The fasl file version number has changed again. (because of the
1393 bug fix involving the names of PCL MAKE-INSTANCE functions)
1395 changes in sbcl-0.7.6 relative to sbcl-0.7.5:
1396 * bug fix: Floating point exceptions are treated much more
1397 consistently on the x86/Linux and PPC/Linux platforms.
1398 * Array initialization with :INITIAL-ELEMENT is now much faster for
1399 cases when the compiler cannot open code the array creation, but
1400 does know what the UPGRADED-ARRAY-ELEMENT-TYPE will be. General
1401 array accesses have also seen a speed increase.
1402 * bug fix: LOAD :IF-DOES-NOT-EXIST NIL now works when file type is
1403 specified. (This was at the root of some bad interactions between
1404 SBCL and ILISP: thanks to Gregory Wright for diagnosing this and
1406 * bug fix: Internal error arguments for undefined functions are now
1407 computed correctly on the PPC/Linux platform.
1408 * bug fix: Bad &REST syntax is now checked correctly. (thanks to
1409 Raymond Toy's patch for CMU CL)
1410 * Support for the Solaris 9 operating environment has been included
1411 (thanks to Daniel Merritt)
1412 * A very ugly but hopefully complete draft of the missing FFI chapter
1413 of the manual has been created by reformatting the corresponding
1414 CMU CL manual chapter into (currently very ugly and incoherent)
1415 DocBook and bringing it up to date for SBCL behavior. Thus, the
1416 manual is now essentially complete, at least by my extreme
1417 once-and-only-once standards, whereby it's acceptable to refer to
1418 the doc strings of SB-EXT functions as the primary documentation.
1419 * The fasl file version number has changed again, due to cleanup of
1420 (user-invisible) bitrotted stuff. (E.g. *!INITIAL-FDEFN-OBJECTS*
1421 is no longer a static symbol.)
1423 changes in sbcl-0.7.5 relative to sbcl-0.7.4:
1424 * SBCL now builds with OpenMCL (version 0.12) as the
1425 cross-compilation host; also, more progress has been made toward
1426 bootstrapping under CLISP.
1427 * SBCL now runs on the Tru64 (aka OSF/1) operating system on the
1429 * bug 158 fixed: The compiler can now deal with integer loop
1430 increments different from 1; fixing this turned out also to fix
1432 * bug 169 fixed: no more bogus warnings about using lexical bindings
1433 despite the presence of perfectly good SPECIAL declarations (thanks
1434 to David Lichteblau)
1435 * bug 175 fixed: CHANGE-CLASS is now more ANSI-conforming,
1436 accepting initargs. (thanks to Espen Johnsen and Pierre Mai)
1437 * bug 179 fixed: DIRECTORY can now deal with filenames with pattern
1439 * bug 180 fixed: Method combination specifications no longer ignore
1440 the :MOST-SPECIFIC-LAST option. (thanks to Pierre Mai)
1441 * bug fix: Structure type predicate functions now check their argument
1442 count as they should.
1443 * bug fix: Classes with :METACLASS STRUCTURE-CLASS now print
1444 correctly. (thanks to Pierre Mai)
1445 * minor incompatible change: The --noprogrammer option is deprecated
1446 in favor of the new --disable-debugger option, which is very similar.
1447 (The major difference is that it takes effect at a slightly different
1448 time at startup, causing handling of errors in --sysinit and
1449 --userinit files will be affected differently.) The
1450 SB-EXT:DISABLE-DEBUGGER and SB-EXT:ENABLE-DEBUGGER functions have
1451 been added to allow this functionality to be controlled from ordinary
1452 Lisp code. (ENABLE-DEBUGGER should help people like the Debian
1453 maintainers, who might want to run non-interactive scripts to
1454 build SBCL cores which will later be used interactively.)
1455 * minor incompatible change: The LOAD function no longer, when given
1456 a wild pathname to load, loads all files matching that pathname.
1457 Instead, an error of type FILE-ERROR is signalled.
1459 changes in sbcl-0.7.4 relative to sbcl-0.7.3:
1460 * bug 147 fixed: The compiler preserves its block link/count
1461 invariants more correctly now so that it doesn't crash. (thanks
1463 * Dynamic loading of object files in OpenBSD is now supported. (thanks
1465 * COMPILE now works correctly on macros. (thanks to Matthias Hoelzl)
1466 * GET-MACRO-CHARACTER and SET-MACRO-CHARACTER now represent
1467 no-value-for-this-character as NIL (as specified by ANSI).
1468 * HOST-NAMESTRING on physical pathnames now returns a string that is
1469 valid as a host argument to MERGE-PATHNAMES and to MAKE-PATHNAME.
1470 (thanks to Christophe Rhodes)
1471 * The Alpha port handles icache flushing more correctly. (thanks to
1473 * More progress has been made toward bootstrapping under CLISP. (thanks
1474 to Christophe Rhodes)
1475 * The fasl file format has changed again, because dynamic loading
1476 on OpenBSD (which has non-ELF object files) motivated some cleanups
1477 in the way that foreign symbols are transformed and passed around.
1478 * minor incompatible change: The ASCII RUBOUT character, (CHAR-CODE 127),
1479 is no longer treated as whitespace by the reader, but instead as
1480 an ordinary character. Thus e.g. (READ-FROM-STRING "A
\7fB") returns
1481 |A
\7fB|, instead of A as it used to.
1483 changes in sbcl-0.7.3 relative to sbcl-0.7.2:
1484 * ANSI's DEFINE-SYMBOL-MACRO is now supported. (thanks to Nathan
1485 Froyd porting CMU CL code originally by Douglas Thomas Crosher)
1486 * SBCL now runs on the PPC archtiecture under Linux. It actually did
1487 this as of 0.7.1.45, but was left out of the previous news section
1488 (thanks to Dan Barlow)
1489 * SBCL now runs on the Solaris operating system on SPARC architectures
1490 (thanks to Christophe Rhodes's port of the CMUCL runtime)
1491 * cleanups to the runtime on SPARC, both Linux and Solaris, and for
1492 gcc>=3 (thanks to Nathan Froyd and Ingvar Mattsson)
1493 * SPARC backend cleanups, allowing builds of cores optimized for V8
1494 and V9 SPARCS, and also emission of code targeted to a particular
1495 backend chosen at runtime (thanks to Christophe Rhodes and Raymond
1497 * SBCL is closer to bootstrapping under CLISP, thanks to various
1498 fixes by Christophe Rhodes.
1499 * The fasl file format has changed again, to allow the compiler's
1500 INFO database to support symbol macros.
1501 * The user manual (in doc/) is formatted into HTML more nicely.
1502 (thanks to coreythomas)
1503 * The system is smarter about SUBTYPEP relationships, especially
1504 those involving NOT types (including types such as ATOM which are
1505 represented internally using NOT types). Thus SUBTYPEP is less
1506 likely to return (VALUES NIL NIL) in general, and in particular
1507 bugs 58 and (the remaining bits of) bug 50 are fixed. (thanks to
1509 * The fasl file format has changed again, because the internal
1510 representation of types now includes a new slot to support the new
1511 SUBTYPEP-of-NOT-types logic.
1512 * (not a change in the main branch of SBCL, but a related prototype
1513 which can hopefully be merged into the main branch of SBCL in the
1514 future:) Brian Spilsbury has produced a Unicode-enabled variant of
1515 sbcl-0.7.0, available as a patch against sbcl-0.7.0 at
1516 <http://designix.com.au/brian/SBCL/sbcl-0.7.0-unicode.p0.gz>.
1517 * Bug 151 fixed: GET-DISPATCH-MACRO-CHAR now returns NIL for undefined
1518 dispatch macro character combinations. (thanks to Alexey Dejneka)
1519 * Bugfix in PARSE-NAMESTRING: we now correctly parse unix namestrings
1520 that superficially look like logical namestrings correctly.
1521 * USER-HOMEDIR-PATHNAME now returns a (physical) pathname that SBCL
1523 * Bugfix in DEFSTRUCT: BOA constructor lambda lists now accept (name
1524 default supplied-p) for &optional and &key arguments. (thanks to
1527 changes in sbcl-0.7.2 relative to sbcl-0.7.1:
1528 * incompatible change: The compiler is now less aggressive about
1529 tail call optimization, doing it only when (> SPACE DEBUG) or
1530 (> SPEED DEBUG). (This is an incompatible change because there are
1531 programs which relied on the old CMU-CL-style behavior to optimize
1532 away their unbounded recursion which will now die of stack overflow.)
1533 * minor incompatible change: The default BYTES-CONSED-BETWEEN-GCS
1534 for non-GENCGC systems has been increased to 20M (since that
1535 seems much closer to the likely performance optimum for modern
1536 systems than the old 4M value was)
1537 * minor incompatible change: new larger values for *DEBUG-PRINT-LENGTH*
1538 and *DEBUG-PRINT-LEVEL*
1539 * SBCL runs on SPARC systems now. (thanks to Christophe Rhodes' port
1540 of CMU CL's support for SPARC, and various endianness and other
1541 SBCL portability fixes due to Christophe Rhodes and Dan Barlow)
1542 * new syntactic sugar for the Unix command line: --load foo.bar is now
1543 an alternate notation for --eval '(load "foo.bar")'.
1545 ** The system now detects stack overflow and handles it gracefully,
1546 at least for (OR (> SAFETY (MAX SPEED SPACE)) (= SAFETY 3))
1547 optimization settings. (This is a good thing in general, and
1548 its introduction in this version should be particularly timely
1549 for anyone whose code fails because of suppression of tail
1551 ** The system now hunts for the C variable "environ" in a more
1552 devious way, to avoid segfaults when the C library version differs
1553 between compile time and run time. (thanks to Christophe Rhodes)
1554 ** INTEGER-valued CATCH tags now work. (thanks to Alexey Dejneka,
1555 and also to Christophe Rhodes for porting the fix to non-X86 CPUs)
1556 ** The compiler no longer issues bogus style warnings for undefined
1557 classes in the same source file as the DEFCLASSes which defined
1558 them. (thanks to Stig E Sandoe for reporting and Martin Atzmueller
1560 ** fixes in CONDITION class precedence list for undefined function
1561 errors (thanks to Alexei Dejneka)
1562 ** *DEFAULT-PATHNAME-DEFAULTS* is used more consistently and
1563 correctly. (thanks to Dan Barlow)
1564 ** portability fixes aiming at bootstrapping under CLISP (thanks
1565 to Dave McDonald and Christophe Rhodes)
1566 ** FORMAT fixes (thanks to Robert Strandh and Dan Barlow)
1567 ** fixes in type translation and and type inference (thanks to
1569 ** fixes to optimizer internal errors (thanks to Alexei Dejneka)
1570 ** various fixes in the new ports (thanks to Dan Barlow)
1571 * several changes related to debugging:
1572 ** suppression of tail recursion, as noted above
1573 ** stack overflow detection, as noted above
1574 ** The default implementation of TRACE has changed. :ENCAPSULATE T
1575 is now the default. (For some time encapsulation has been more
1576 reliable than the breakpoint-based :ENCAPSULATE NIL
1577 implementation, at least on X86 systems; and I just noticed that
1578 encapsulation also seems closer to the spirit of the ANSI
1581 changes in sbcl-0.7.1 relative to sbcl-0.7.0:
1583 ** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are set
1584 up properly again. (There was a packaging bug in 0.7.0 which
1585 left their definitions in SB-SYS::LOAD-FOREIGN and
1586 SB-SYS::LOAD-1-FOREIGN. LOAD-FOREIGN and LOAD-1-FOREIGN are
1587 vital for most things which interface to C-level interfaces,
1588 like extensions working with sockets or databases or
1589 Perl-compatible regexes or whatever, and the need to fix
1590 this bug is the main reason that 0.7.1 was released so
1592 ** DEFGENERIC is now choosier about the methods it redefines, so that
1593 reLOADing a previously-LOADed file containing DEFGENERICs does
1594 the right thing now. Thus, the Lispy edit/reLOAD-a-little/test
1595 cycle now works as it should. (thanks to Alexey Dejneka)
1596 ** Bug 106 (types (COMPLEX FOO) where FOO is an obscure type) was
1597 fixed by Christophe Rhodes. (He actually submitted this patch
1598 months ago, and I delayed until after 0.7.0.)
1599 ** Bug 111 (internal compiler confusion about runtime checks on
1600 FUNCTION types) was fixed by Alexey Dejneka.
1601 * Some internal cleanups (getting rid of variables which aren't
1602 needed now that the byte interpreter is gone) caused the fasl
1603 file format number to change again.
1605 changes in sbcl-0.7.0 relative to sbcl-0.6.13:
1606 * major incompatible change: The default fasl file extension, i.e. the
1607 default extension for files produced by COMPILE-FILE, has changed
1608 to ".fasl", for all architectures. (No longer ".x86f" and ".axpf".)
1610 ** There are many changes in the implementation of the compiler.
1611 SBCL is now essentially a compiler-only implementation of ANSI
1612 Common Lisp. EVAL still "interprets" a few special cases, but
1613 almost all the interesting cases are handled by creating
1614 a LAMBDA expression, calling COMPILE on it, then calling
1615 FUNCALL on the result.
1616 ** The EVAL-WHEN code has been rewritten to be ANSI-compliant, and
1617 various related bugs (IR1-1, IR1-2, IR1-3, IR1-3a) have gone away.
1618 Since the code is newer, there might still be some new bugs
1619 (though not as many as before Martin Atzmueller's fixes:-). But
1620 the new code is substantially simpler and clearer, and hopefully
1621 any remaining bugs will be simpler, less fundamental, and more
1622 fixable then the bugs in the old code.
1623 ** The revised compiler is still a little unsteady on its feet.
1625 *** The debugging information it produces (particularly the names
1626 of FUNCTION objects) is sometimes much less useful than what
1627 the old compiler produced.
1628 *** The support for inlining FOO when you (DECLAIM (INLINE FOO))
1629 then do (DEFUN FOO ..) in a non-null lexical environment (e.g.
1630 within a MACROLET) has been temporarily weakened.
1631 ** There are new compiler optimizations for various functions:
1632 *** the sequence functions FIND, POSITION, FIND-IF, POSITION-IF,
1633 FIND-IF-NOT, POSITION-IF-NOT, and FILL
1634 *** the math functions TRUNCATE, FLOOR, and CEILING
1635 *** the function-of-all-trades COERCE
1636 Mostly these should be transparent, but there's one
1637 potentially-annoying problem (bug 117): when the compiler
1638 inline-expands a function and does type analysis on the result,
1639 it can create control paths which have type mismatches, and
1640 when it can't prove that those control paths aren't taken,
1641 it will issue WARNINGs about the type mismatches. This is
1642 a particular problem in practice for the new sequence functions.
1643 It's not clear how this should be fixed, and for now, a
1644 workaround is given in the entry for 117 in the BUGS file.
1645 ** (Because of the interaction between the two previous items --
1646 occasional inlining problems and new inline expansions -- some
1647 of the new sequence function optimizations won't really kick in
1648 completely until debugging information, and then inlining, are
1649 straightened out in some future version.)
1650 * minor incompatible changes:
1651 ** As part of a bug fix by Christophe Rhodes to DIRECTORY behavior,
1652 DIRECTORY no longer implicitly promotes NIL slots of its
1653 pathname argument to :WILD. In particular, when you ask for the
1654 contents of a directory (which you used to be able to do without
1655 explicit wildcards, e.g. (DIRECTORY "/tmp/")) you now need to use
1656 explicit wildcards, e.g. (DIRECTORY "/tmp/*.*").
1657 ** changes in behavior that ANSI explicitly defines to be
1658 implementation dependent:
1659 *** The new compiler-only implementation still conforms with ANSI,
1660 but acts a little different than before. Besides the obvious
1661 changes in performance tradeoffs (that the cost per form passed
1662 to EVAL has gone up, and the cost per form executed by EVAL
1663 has gone down), the behavior of the system changes a little
1664 because there are no longer any interpreted function objects.
1665 COMPILED-FUNCTION-P is now synonymous with FUNCTIONP, and
1666 e.g. doing COMPILE on the output of interactive DEFUN is
1668 *** The value of INTERNAL-TIME-UNITS-PER-SECOND has been increased
1670 *** The default for the USE list in MAKE-PACKAGE and DEFPACKAGE
1671 has changed from (:CL) to NIL.
1672 *** The CHAR-NAME of unprintable ASCII characters which, unlike
1673 e.g. #\Newline and #\Tab, don't have names specified in the
1674 ANSI Common Lisp standard, is now based on their ASCII symbolic
1675 names (#\Nul, #\Soh, #\Stx, etc.) The old CMU-CL-style names
1676 (#\Null, #\^a, #\^b, etc.) are still accepted by NAME-CHAR, but
1677 are no longer used for output.
1678 ** changes in internal implementation constants:
1679 *** The default value of *BYTES-CONSED-BETWEEN-GCS* has doubled, to
1680 4 million. (If your application spends a lot of time GCing and
1681 you have a lot of RAM, you might want to experiment with
1682 increasing it even more.)
1683 ** The SB-C-CALL package has been merged into the SB-ALIEN package.
1684 However, almost all old code should still continue to work without
1685 immediate update, as SB-C-CALL is now a (deprecated) nickname
1687 ** Old operator names in the style DEF-FOO are now deprecated in
1688 favor of new corresponding names DEFINE-FOO, for consistency with
1689 the naming convention used in the ANSI standard (DEFSTRUCT, DEFVAR,
1690 DEFINE-CONDITION, DEFINE-MODIFY-MACRO..). This mostly affects
1691 internal symbols, but a few supported extensions like
1692 SB-ALIEN:DEF-ALIEN-FUNCTION are also affected. (So e.g.
1693 DEF-ALIEN-FUNCTION becomes DEFINE-ALIEN-FUNCTION.)
1694 ** The debugger prompt sequence now goes "5]", "5[2]", "5[3]",
1695 etc. as you get deeper into recursive calls to the debugger
1696 command loop, instead of the old "5]", "5]]", "5]]]"
1697 sequence. (I was motivated to do this when squabbles between
1698 ILISP and SBCL left me very deeply nested in the debugger. In the
1699 short term, this change will probably provoke more ILISP/SBCL
1700 squabbles, but hopefully it will be an improvement in the long run.)
1701 ** SB-ALIEN:DEFINE-ALIEN-FUNCTION (also known by the old deprecated
1702 name DEF-ALIEN-FUNCTION) now does DECLAIM FTYPE for the defined
1703 function, since declaiming return types involving aliens is
1704 (1) annoyingly messy to do by hand and (2) vital to efficient
1705 compilation of code which calls such functions.
1706 ** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are no
1707 longer reexported by the SB-EXT package. They're solely useful
1708 for alien code, so it seems more logical that you should get
1709 them from the SB-ALIEN package, not in SB-EXT.
1710 ** :SB-CONSTRAIN-FLOAT-TYPE, :SB-PROPAGATE-FLOAT-TYPE, and
1711 :SB-PROPAGATE-FUN-TYPE are no longer considered to be optional
1712 features. Instead, the code that they used to control is always
1713 built into the system.
1714 * many other bug fixes
1715 ** DEFSTRUCT and DEFCLASS have been substantially updated to take
1716 advantage of the new EVAL-WHEN stuff and to clean them up in
1717 general, and they are now more ANSI-compliant in a number of
1718 ways. Martin Atzmueller is responsible for a lot of this.
1719 ** Besides the cleanups discussed above, Martin Atzmueller fixed
1721 *** fixes in READ-SEQUENCE and WRITE-SEQUENCE
1722 *** correct ERROR type for various file operations
1723 *** some fixes for Lisp streams
1724 *** DEFMETHOD syntax checking
1725 *** changing old weird representation of debug information as
1726 strings (which, among their other deficiencies, don't transform
1727 correctly when you rename packages, and don't change their
1728 print representation when you change things like *PACKAGE*
1729 and *PRINT-LENGTH*) to symbols and lists of symbols
1730 He also made several improvements and fixed several bugs in DESCRIBE.
1731 ** Alexey Dejneka fixed many bugs, including classic bugs and bugs he
1733 *** misbehavior of WRITE-STRING/WRITE-LINE
1734 *** LOOP over keys of a hash table, LOOP bugs 49b and 81 and 103,
1735 and several other LOOP problems as well
1736 *** DIRECTORY when similar filenames are present
1737 *** DEFGENERIC with :METHOD options
1738 *** bug 126, in (MAKE-STRING N :INITIAL-ELEMENT #\SPACE))
1739 *** bug in the optimization of ARRAY-ELEMENT-TYPE
1740 *** argument ordering in FIND with :TEST option
1741 *** mishandled package designator argument in APROPOS-LIST
1742 *** various problems in the backquote readmacro
1743 *** a bug in APROPOS
1744 *** probably some others that I'm not describing very well here,
1745 since the CVS log documents them by reference to sbcl-devel
1746 messages, and the SourceForge archives aren't working well.:-(
1747 ** Dan Barlow improved the Alpha port (and is making progress on the
1748 PPC port, for those of you who think different).
1749 ** Besides the DIRECTORY fixes and changes mentioned elsewhere,
1750 Christophe Rhodes cleaned up the system self-test scripts (in tests/*),
1751 contributed the optimization of FIND-IF-NOT and POSITION-IF-NOT, and
1752 continues to work on the SPARC port (for those of you in a position
1753 to look down upon our little PC-compatible boxes from a great height).
1754 ** PPRINT-LOGICAL-BLOCK now copies the *PRINT-LINES* value on entry
1755 and uses that copy, rather than the current dynamic value, when
1756 it's trying to decide whether to truncate output. Thus e.g.
1757 (let ((*print-lines* 50))
1758 (pprint-logical-block (stream nil)
1760 (let ((*print-lines* 8))
1761 (print (aref possiblybigthings i) stream)))))
1762 should now truncate the logical block only at 50 lines, instead of
1763 often truncating it at 8 lines, as it did before.
1764 * The doc/cmucl/ directory, containing old CMU CL documentation
1765 from the time of the fork, is no longer part of the base system.
1766 SourceForge has shut down its anonymous FTP service, and with it
1767 my original plan for distributing the old CMU CL documentation
1768 there. For now, if you need these files you can download an old
1769 SBCL source release and extract them from it.
1770 * The fasl file version number changed again, for dozens of reasons,
1771 some of which are apparent above.
1773 changes in sbcl-0.6.13 relative to sbcl-0.6.12:
1774 * a port to the Compaq/DEC Alpha CPU, thanks to Dan Barlow
1775 * Martin Atzmueller ported Tim Moore's marvellous CMU CL DISASSEMBLE
1776 patch, so that DISASSEMBLE output is much nicer.
1777 * The code in the SB-PROFILE package now seems reasonably stable.
1778 I still haven't decided what the final interface should look like
1779 (I'd like PROFILE to interact cleanly with TRACE, since both
1780 facilities use function encapsulation) but if you have a need
1781 for profiling now, you can probably use it successfully with
1782 the current CMU-CL-style interface.
1783 * Pathnames and *DEFAULT-DIRECTORY-DEFAULTS* are much more
1784 ANSI-compliant, thanks to various fixes and tests from Dan Barlow.
1785 Also, at Dan Barlow's suggestion, TRUENAME on a dangling symbolic
1786 link now returns the dangling link itself, and for similar
1787 reasons, TRUENAME on a cyclic symbolic link returns the cyclic
1788 link itself. (In these cases the old code signalled an error and
1789 looped endlessly, respectively.) Thus, DIRECTORY now works even
1790 in the presence of dangling and cyclic symbolic links.
1791 * Compiler trace output (the :TRACE-FILE option to COMPILE-FILE)
1792 is now a supported extension again, since the consensus on
1793 sbcl-devel was that it can be useful for ordinary development
1794 work, not just for debugging SBCL itself.
1795 * The default for SB-EXT:*DERIVE-FUNCTION-TYPES* has changed to
1796 NIL, i.e. ANSI behavior, i.e. the compiler now recognizes
1797 that currently-defined functions might be redefined later with
1798 different return types.
1799 * Hash tables can be printed readably, as inspired by CMU CL code
1800 of Eric Marsden and SBCL code of Martin Atzmueller.
1801 * better error handling in CLOS method combination, thanks to
1802 Martin Atzmueller porting Pierre Mai's CMU CL patches
1803 * more overflow fixes for >16Mbyte I/O buffers
1804 * A bug in READ has been fixed, so that now a single Ctrl-D
1805 character suffices to cause end-of-file on character streams.
1806 In particular, now you only need one Ctrl-D at the command
1807 line (not two) to exit SBCL.
1808 * fixed bug 26: ARRAY-DISPLACEMENT now returns (VALUES NIL 0) for
1810 * fixed bug 107 (reported as a CMU CL bug by Erik Naggum on
1811 comp.lang.lisp 2001-06-11): (WRITE #*101 :RADIX T :BASE 36) now
1812 does the right thing.
1813 * The implementation of some type tests, especially for CONDITION
1814 types, is now tidier and maybe faster, due to CMU CL code
1815 originally by Douglas Crosher, ported by Martin Atzmueller.
1816 * Some math functions have been fixed, and there are new
1817 optimizers for deriving the types of COERCE and ARRAY-ELEMENT-TYPE,
1818 thanks to Raymond Toy's work on CMU CL, ported by Martin Atzmueller.
1819 * (There are also some new optimizers in contrib/*-extras.lisp. Those
1820 aren't built into sbcl-0.6.13, but are a sneak preview of what's
1821 likely to be built into sbcl-0.7.0.)
1822 * A bug in COPY-READTABLE was fixed. (Joao Cachopo's patch to CMU
1823 CL, ported to SBCL by Martin Atzmueller)
1824 * DESCRIBE now gives more information in some cases. (Pierre Mai's
1825 patch to CMU CL, ported to SBCL by Martin Atzmueller)
1826 * Martin Atzmueller and Bill Newman fixed some bugs in INSPECT.
1827 * There's a new slam.sh hack to shorten the edit/compile/debug
1828 cycle for low-level changes to SBCL itself, and a new
1829 :SB-AFTER-XC-CORE target feature to control the generation of
1830 the after-xc.core file needed by slam.sh.
1831 * minor incompatible change: The ENTRY-POINTS &KEY argument to
1832 COMPILE-FILE is no longer supported, so that now every function
1833 gets an entry point, so that block compilation looks a little
1834 more like the plain vanilla ANSI section 3.2.2.3 scheme.
1835 * minor incompatible change: SB-EXT:GET-BYTES-CONSED now
1836 returns the number of bytes consed since the system started,
1837 rather than the number consed since the first time the function
1838 was called. (The new definition parallels ANSI functions like
1839 CL:GET-INTERNAL-RUN-TIME.)
1840 * minor incompatible change: The old CMU-CL-style DIRECTORY options,
1841 i.e. :ALL, :FOLLOW-LINKS, and :CHECK-FOR-SUBDIRS, are no longer
1842 supported. Now DIRECTORY always does the abstract Common-Lisp-y
1843 thing, i.e. :ALL T :FOLLOW-LINKS T :CHECK-FOR-SUBDIRS T.
1844 * Fasl file version numbers are now independent of the target CPU,
1845 since historically most system changes which required version
1846 number changes have affected all CPUs equally. Similarly,
1847 the byte fasl file version is now equal to the ordinary
1850 changes in sbcl-0.6.12 relative to sbcl-0.6.11:
1851 * incompatible change: The old SB-EXT:OPTIMIZE-INTERFACE declaration
1852 is no longer recognized. I apologize for this, because it was
1853 listed in SB-EXT as a supported extension, but I found that
1854 its existing behavior was poorly specified, as well as incorrectly
1855 specified, and it looked like too much of a mess to straighten it
1856 out. I have enough on my hands trying to get ANSI stuff to work..
1857 * many patches ported from CMU CL by Martin Atzmueller, with
1858 half a dozen bug fixes in pretty-printing and the debugger, and
1859 half a dozen others elsewhere
1860 * fixed bug 13: Floating point infinities are now supported again.
1861 They might still be a little bit flaky, but thanks to bug reports
1862 from Nathan Froyd and CMU CL patches from Raymond Toy they're not
1863 as flaky as they were.
1864 * The --noprogrammer command line option is now supported. (Its
1865 behavior is slightly different in detail from what the old man
1866 page claimed it would do, but it's still appropriate under the
1867 same circumstances that the man page talks about.)
1868 * The :SB-PROPAGATE-FLOAT-TYPE and :SB-PROPAGATE-FUN-TYPE features
1869 are now supported, and enabled by default. Thus, the compiler can
1870 handle many floating point and complex operations much less
1871 inefficiently. (Thus e.g. you can implement a complex FFT
1873 * The compiler now detects type mismatches between DECLAIM FTYPE
1874 and DEFUN better, and implements CHECK-TYPE more correctly, and
1875 SBCL builds under CMU CL again despite its non-ANSI EVAL-WHEN,
1876 thanks to patches from Martin Atzmueller.
1877 * various fixes to make the cross-compiler more portable to
1878 ANSI-conforming-but-different cross-compilation hosts (notably
1879 Lispworks for Windows, following bug reports from Arthur Lemmens)
1880 * A bug in READ-SEQUENCE for CONCATENATED-STREAM, and a gross
1881 ANSI noncompliance in DEFMACRO &KEY argument parsing, have been
1882 fixed thanks to Pierre Mai's CMU CL patches.
1883 * fixes to keep the system from overflowing internal counters when
1884 it tries to use i/o buffers larger than 16M bytes
1885 * fixed bug 45a: Various internal functions required to support
1886 complex special functions have been merged from CMU CL sources.
1887 (When I was first setting up SBCL, I misunderstood a compile-time
1888 conditional #-OLD-SPECFUN, and so accidentally deleted them.)
1889 * improved support for type intersection and union, fixing bug 12
1890 (e.g., now (SUBTYPEP 'KEYWORD 'SYMBOL)=>T,T) and some other
1891 more obscure bugs as well
1892 * some steps toward byte-compiling non-performance-critical
1893 parts of the system, courtesy of patches from Martin Atzmueller
1894 * Christophe Rhodes has made some debian packages of sbcl at
1895 <http://www-jcsu.jesus.cam.ac.uk/ftp/pub/debian/lisp>.
1896 From his sbcl-devel e-mail of 2001-04-08 they're not completely
1897 stable, but are nonetheless usable. When he's ready, I'd be happy
1898 to add them to the SourceForge "File Releases" section. (And if
1899 anyone wants to do RPMs or *BSD packages, they'd be welcome too.)
1900 * new fasl file format version number (because of changes in
1901 internal representation of (OR ..) types to accommodate the new
1902 support for (AND ..) types, among other things)
1904 changes in sbcl-0.6.11 relative to sbcl-0.6.10:
1905 * Martin Atzmueller pointed out that bugs #9 and #25 are gone in
1907 * bug 34 fixed by Martin Atzmueller: dumping/loading instances works
1909 * fixed bug 40: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE,
1910 and UPGRADED-COMPLEX-PART-TYPE now work better with of compound
1911 types built from undefined types, e.g. '(VECTOR SOME-UNDEF-TYPE).
1912 * DESCRIBE now works on structure objects again.
1913 * Most function call argument type mismatches are now handled as
1914 STYLE-WARNINGs instead of full WARNINGs, since the compiler doesn't
1915 know whether the function will be redefined before the call is
1916 executed. (The compiler could flag local calls with full WARNINGs,
1917 as per the ANSI spec "3.2.2.3 Semantic Constraints", but right now
1918 it doesn't keep track of enough information to know whether calls
1919 are local in this sense.)
1920 * Compiler output is now more verbose, with messages truncated
1921 later than before. (There should be some supported way for users
1922 to override the default verbosity, but I haven't decided how to
1923 provide it yet, so this behavior is still controlled by the internal
1924 SB-C::*COMPILER-ERROR-PRINT-FOO* variables in
1925 src/compiler/ir1util.lisp.)
1926 * Fasl file format version numbers have increased again, because
1927 support for the Gray streams extension changes the layout of the
1928 system's STREAM objects.
1929 * The Gray subclassable streams extension now works, thanks to a
1930 patch from Martin Atzmueller.
1931 * The full LOAD-FOREIGN extension (not just the primitive
1932 LOAD-FOREIGN-1) now works, thanks to a patch from Martin Atzmueller.
1933 * The default behavior of RUN-PROGRAM has changed. Now, unlike CMU CL
1934 but like most other programs, it defaults to copying the Unix
1935 environment from the original process instead of starting the
1936 new process in an empty environment.
1937 * Extensions which manipulate the Unix environment now support
1938 an :ENVIRONMENT keyword option which doesn't smash case or
1939 do other bad things. The CMU-CL-style :ENV option is retained
1940 for porting convenience.
1941 * LOAD-FOREIGN (and LOAD-1-FOREIGN) now support logical pathnames,
1942 as per Daniel Barlow's suggestion and Martin Atzmueller's patch
1944 changes in sbcl-0.6.10 relative to sbcl-0.6.9:
1946 * A patch from Martin Atzmueller seems to have solved the SIGINT
1947 problem, and as far as we know, signal-handling now works cleanly.
1948 (If you find any new bugs, please report them!)
1949 * The system no longer defaults Lisp source file names to types
1950 ".l", ".cl", or ".lsp", but only to ".lisp".
1951 * The compiler no longer uses special default file extensions for
1952 byte-compiled code. (The ANSI definition of COMPILE-FILE-PATHNAME
1953 seems to expect a single default extension for all compiled code,
1954 and there's no compelling reason to try to stretch the standard
1955 to allow two different extensions.) Instead, byte-compiled files
1956 default to the same extension as native-compiled files.
1957 * Fasl file format version numbers have increased again, because
1958 a rearrangement of internal implementation packages made some
1959 dumped symbols in old fasl files unreadable in new cores.
1960 * DECLARE/DECLAIM/PROCLAIM logic is more nearly ANSI in general, with
1961 many fewer weird special cases.
1962 * Bug #17 (differing COMPILE-FILE behavior between logical and
1963 physical pathnames) has been fixed, and some related misbehavior too,
1964 thanks to a patch from Martin Atzmueller.
1965 * Bug #30 (reader problems) is gone, thanks to a CMU CL patch
1966 by Tim Moore, ported to SBCL by Martin Atzmueller.
1967 * Martin Atzmueller fixed several filesystem-related problems,
1968 including bug #36, in part by porting CMU CL patches, which were
1969 written in part by Paul Werkowski.
1970 * More compiler warnings in src/runtime/ are gone, thanks to
1971 more patches from Martin Atzmueller.
1972 * Martin Atzmueller pointed out that bug 37 was fixed by his patches
1975 changes in sbcl-0.6.9 relative to sbcl-0.6.8:
1977 * DESCRIBE now works on CONDITION objects.
1978 * The debugger now handles errors which arise when trying to print
1979 *DEBUG-CONDITION*, so that it's less likely to fall into infinite
1981 * The build system now uses an additional file, customize-target-features.lisp,
1982 to allow local modifications to the target *FEATURES* list. (The point of
1983 this is that now I can set up a custom configuration, e.g. with :SB-SHOW
1984 debugging features enabled, without having to worry about propagating it
1985 into everyone's system when I do a "cvs update".) When no
1986 customize-target-features.lisp file exists, the target *FEATURES* list
1987 should be constructed the same way as before.
1988 * fixed bugs in DEFCONSTANT ANSI-compatibility:
1989 ** DEFCONSTANT now tests reassignments using EQL, not EQUAL, in order to
1990 warn about behavior which is undefined under the ANSI spec. Note: This
1991 is specified by ANSI, but it's not very popular with programmers.
1992 If it causes you problems, take a look at the new SB-INT:DEFCONSTANT-EQX
1993 macro in the SBCL sources for an example of a workaround which you
1994 might use to make portable ANSI-standard code which does what you want.
1995 ** DEFCONSTANT's implementation is now based on EVAL-WHEN instead of on
1996 pre-ANSI IR1 translation magic, so it does the ANSI-specified thing
1997 when it's used as a non-toplevel form. (This is required in order
1998 to implement the DEFCONSTANT-EQX macro.)
1999 ** (DEFCONSTANT X 1) (DEFVAR X) (SETF X 2) no longer "works".
2000 ** Unfortunately, non-toplevel DEFCONSTANT forms can still do some
2001 funny things, due to bugs in the implementation of EVAL-WHEN
2002 (bug #IR1-3). This probably won't be fixed until 0.7.x. (Fortunately,
2003 non-toplevel DEFCONSTANTs are uncommon.)
2004 * The core file version number and fasl file version number have been
2005 incremented, because the old noncompliant DEFCONSTANT behavior involved
2006 calling functions which no longer exist, and because I also took the
2007 opportunity to chop an unsupported slot out of the DEBUG-SOURCE structure.
2008 * fixed bug 1 (error handling before read-eval-print loop starts), and
2009 redid debugger restarts and related debugger commands somewhat while
2011 ** The QUIT debugger command is gone, since it did something
2012 rather different than the SB-EXT:QUIT command, and since it never
2013 worked properly outside the main toplevel read/eval/print loop.
2014 Invoking the new TOPLEVEL restart provides the same functionality.
2015 ** The GO debugger command is also gone, since you can just invoke
2016 the CONTINUE restart directly instead.
2017 ** The TOP debugger command is also gone, since it's redundant with the
2018 FRAME 0 command, and since it interfered with abbreviations for the
2020 * The system now recovers better from non-PACKAGE values of the *PACKAGE*
2022 * The system now understands compound CONS types (e.g. (CONS FIXNUM T))
2023 as required by ANSI. (thanks to Douglas Crosher's CMU CL patches, with
2024 some porting work by Martin Atzmueller)
2025 * Martin Atzmueller reviewed the CMU CL mailing lists and came back
2026 with a boatload of patches which he ported to SBCL. Now that those
2028 ** The system tries to make sure that its low-priority messages
2029 are prefixed by semicolons, to help people who like to use
2030 syntax highlighting in their ILISP buffer. (This patch
2031 was originally due to Raymond Toy.)
2032 ** The system now optimizes INTEGER-LENGTH better, thanks to more
2033 patches originally written by Raymond Toy.
2034 ** The compiler understands coercion between single-value and
2035 multiple-VALUES type expressions better, getting rid of some very
2036 weird behavior, thanks to patches originally by Robert MacLachlan
2037 and Douglas Crosher.
2038 ** The system understands ANSI-style non-KEYWORD &KEY arguments in
2039 lambda lists, thanks to a patch originally by Pierre Mai.
2040 ** The system no longer bogusly warns about "abbreviated type
2042 ** The compiler gets less confused by inlining and RETURN-FROM,
2043 thanks to some patches originally by Tim Moore.
2044 ** The system no longer hangs when dumping circular lists to fasl
2045 files, thanks to a patch originally from Douglas Crosher.
2046 * Martin Atzmueller also fixed ROOM, so that it no longer fails with an
2047 undefined function error.
2048 * gave up on fixing bug 3 (forbidden-by-ANSI warning for type mismatch
2049 in structure slot initforms) for now, documented workaround instead:-|
2050 * fixed bug 4 (no WARNING for DECLAIM FTYPE of slot accessor function)
2051 * fixed bug 5: added stubs for various Gray stream functions called
2052 in the not-a-CL:STREAM case, so that even when Gray streams aren't
2053 installed, at least appropriate type errors are generated
2054 * fixed bug 8: better reporting of various PROGRAM-ERRORs
2055 * fixed bug 9: IGNORE and IGNORABLE now work reasonably and more
2056 consistently in DEFMETHOD forms.
2057 * removed bug 21 from BUGS, since Martin Atzmueller points out that
2058 it doesn't seem to affect SBCL after all
2059 * The C runtime system now builds with better optimization and many
2060 fewer warnings, thanks to lots of cleanups by Martin Atzmueller.
2062 changes in sbcl-0.6.8 relative to sbcl-0.6.7:
2064 * The system is now under CVS at SourceForge (instead of the
2065 CVS repository on my home machine).
2066 * The new signal handling code has been tweaked to treat register
2067 contents as (UNSIGNED-BYTE 32), as the old CMU CL code did,
2068 instead of (SIGNED-BYTE 32), as the C header files have it. (Code
2069 downstream, e.g. in debug-int.lisp, has implicit dependencies
2070 on the unsignedness of integer representation of machine words,
2071 and that caused the system to bomb out with infinite regress
2072 when trying to recover from type errors involving signed values,
2073 e.g. (BUTLAST '(1 2 3) -1).)
2074 * (BUTLAST NIL) and (NBUTLAST NIL) now return NIL as they should.
2075 (This was one of the bugs Peter Van Eynde reported back in July.)
2076 * The system now uses code inspired by Colin Walters' O(N)
2077 implementation of MAP (from the cmucl-imp@cons.org mailing
2078 list, 2 September 2000) when it can't use a DEFTRANSFORM to
2079 inline the MAP operation, and there is more than one
2080 sequence argument to the MAP call (so that it can't just
2081 do ETYPECASE once and for all based on the type of the
2082 single sequence argument). (The old non-inline implementation
2083 of the general M-argument sequence-of-length-N case required
2084 O(M*N*N) time when any of the sequence arguments were LISTs.)
2085 * The QUIT :UNIX-CODE keyword argument has been renamed to
2086 QUIT :UNIX-STATUS. (The old name still works, but is deprecated.)
2087 * Raymond Wiker's patches to port RUN-PROGRAM from CMU CL to SBCL
2089 * Raymond Wiker's patches to port dynamic loading from Linux to
2090 FreeBSD have been added.
2091 * The BUGS file is now more nearly up to date, thanks in large part
2092 to Martin Atzmueller's review of it.
2093 * The debugger now flushes standard output streams before it begins
2094 its output ("debugger invoked" and so forth).
2095 * The core version number and fasl file version number have both
2096 been incremented, because of incompatible changes in the layout
2098 * FINISH-OUTPUT is now called more consistently on QUIT. (It
2099 used to not be called for a saved Lisp image.)
2100 * Martin Atzmueller's version of a patch to fix a compiler crash,
2101 as posted on sbcl-devel 13 September 2000, has been installed.
2102 * Instead of installing Martin Atzmueller's patch for the
2103 compiler transform for SUBSEQ, I deleted the compiler transform,
2104 and transforms for some similar consing operations.
2105 * A bug in signal handling which kept TRACE from working on OpenBSD
2107 * added enough DEFTRANSFORMs to allow (SXHASH 'FOO) to be optimized
2108 away by constant folding
2109 * The system now defines its address space constants in one place
2110 (in the Lisp sources), and propagates them automatically elsewhere
2111 (through GENESIS and the sbcl.h file). Therefore, patching the
2112 address map is less unnecessarily tedious and error-prone. The
2113 Lisp names of address space constants have also been systematized.
2114 * CVS tags like dollar-Header-dollar have been removed from
2115 the sources, because they have never saved me trouble and
2116 they've been source of trouble working with patches and other
2117 diff-related operations.
2118 * fixed the PROG1-vs.-PROGN bug in HANDLER-BIND (reported by
2119 ole.rohne@cern.ch on cmucl-help@cons.org 2000-10-25)
2121 changes in sbcl-0.6.7 relative to sbcl-0.6.6:
2123 * The system has been ported to OpenBSD.
2124 * The system now compiles with a simple "sh make.sh" on the systems
2125 that it's supported on. I.e., now you no longer need to tweak
2126 text in the target-features.lisp-expr and symlinks in src/runtime/
2127 by hand, the make.sh takes care of it for you.
2128 * The system is no longer so grossly inefficient when compiling code
2129 involving vectors implemented as general (not simple) vectors (VECTOR T),
2130 so code which dares to use VECTOR-PUSH-EXTEND and FILL-POINTER, or
2131 which dares to use the various sequence functions on non-simple
2132 vectors, takes less of a performance hit.
2133 * There is now a primitive type predicate VECTOR-T-P
2134 to test for the (VECTOR T) type, so that e.g.
2135 (DEFUN FOO (V) (DECLARE (TYPE (VECTOR T) V)) (AREF V 3))
2136 can now be compiled with some semblance of efficiency. (The old code
2137 turned the type declaration into a full call to %TYPEP at runtime!)
2138 * AREF on (VECTOR T) is still not fast, since it's still compiled
2139 as a full call to SB-KERNEL:DATA-VECTOR-REF, but at least the
2140 ETYPECASE used in DATA-VECTOR-REF is now compiled reasonably
2141 efficiently. (The old version made full calls to SUBTYPEP at runtime!)
2142 * (MAKE-ARRAY 12 :FILL-POINTER T) is now executed less inefficiently,
2143 without making full calls to SUBTYPEP at runtime.
2144 (Some analogous efficiency issues for non-simple vectors specialized to
2145 element types other than T, or for non-simple multidimensional arrays,
2146 have not been addressed. They could almost certainly be handled the
2147 same way if anyone is motivated to do so.)
2148 * The changes in array handling break binary compatibility, so
2149 *BACKEND-FASL-FILE-VERSION* has been bumped to 4.
2150 * (TYPEP (MAKE-ARRAY 12 :FILL-POINTER 4) 'VECTOR) now returns (VALUES T)
2151 instead of (VALUES T T).
2152 * By following the instructions that Dan Barlow posted to sbcl-devel
2153 on 2 July 2000, I was able to enable primitive dynamic object
2154 file loading code for Linux. The full-blown CMU CL LOAD-FOREIGN
2155 functionality is not implemented (since it calls ld to resolve
2156 library references automatically, requiring RUN-PROGRAM for its
2157 implementation), but a simpler SB-EXT:LOAD-1-FOREIGN (which doesn't
2158 try to resolve library references) is now supported.
2159 * The system now flushes the standard output streams when it terminates,
2160 unless QUIT is used with the RECKLESSLY-P option set. It also flushes
2161 them at several other probably-convenient times, e.g. in each pass of
2162 the toplevel read-eval-print loop, and after evaluating a form given
2163 as an "--eval" command-line option. (These changes were motivated by a
2164 discussion of stream flushing issues on cmucl-imp in August 2000.)
2165 * The source transform for TYPEP of array types no longer assumes
2166 that an array whose element type is a not-yet-defined type
2167 is implemented as an array of T, but instead punts, so that the
2168 type will be interpreted at runtime.
2169 * There is now some support for cross-compiling in make.sh: each of
2170 the phases of make.sh has its own script. (This should be transparent
2171 to people doing ordinary, non-cross-compile builds.)
2172 * Since my laptop doesn't have hundreds of megabytes of memory like
2173 my desktop machine, I became more motivated to do some items on
2174 my to-do list in order to reduce the size of the system a little:
2175 ** Arrange for various needed-only-at-cold-init things to be
2176 uninterned after cold init. To support this, those things have
2177 been renamed from FOO and *FOO* to !FOO and *!FOO* (i.e., all
2178 symbols with such names are now uninterned after cold init).
2179 ** Bind SB!C::*TOP-LEVEL-LAMBDA-MAX* to a nonzero value when building
2180 fasl files for cold load.
2181 ** Remove the old compiler structure pooling code (which used to
2182 be conditional on the target feature :SB-ALLOC) completely.
2183 ** Redo the representation of some data in cold init to be more compact.
2184 (I also looked into supporting byte compiled code at bootstrap time,
2185 which would probably reduce the size of the system a lot, but that
2186 looked too complicated, so I punted for now.)
2187 * The maximum signal nesting depth in the src/runtime/ support code has
2188 been reduced from 4096 to 256. (I don't know any reason for the very
2189 large old value. If the new smaller value turns out to break something,
2190 I'll probably just bump it back up.)
2191 * PPRINT-LOGICAL-BLOCK is now pickier about the types of its arguments,
2193 * Many, many bugs reported by Peter Van Eynde have been added to
2194 the BUGS list; some have even been fixed.
2195 * While enabling dynamic object file loading, I tried to make the
2196 code easier to understand, renaming various functions and variables
2197 with less ambiguous names, and changing some function calling
2198 conventions to be Lispier (e.g. returning NIL instead of 0 for failure).
2199 * While trying to figure out how to do the OpenBSD port, I tried to
2200 clean up some of the code in src/runtime/. In particular, I dropped
2201 support for non-POSIX signal handling, added various comments,
2202 tweaked the code to reduce the number of compilation warnings, and
2203 renamed some files to increase consistency.
2204 * To support the new automatic configuration functionality in make.sh,
2205 the source file target-features.lisp-expr has been replaced with the
2206 source file base-target-features.lisp-expr and the machine-generated
2207 file local-target-features.lisp-expr.
2208 * fixed a stupid quoting error in make.sh so that using CMU CL
2209 "lisp -batch" as cross-compilation host works again
2211 changes in sbcl-0.6.6 relative to sbcl-0.6.5:
2213 * DESCRIBE no longer tries to call itself recursively to describe
2214 bound/fbound values, so that it no longer fails on symbols which are
2215 bound to themselves (like keywords, T, and NIL).
2216 * DESCRIBE now works on generic functions.
2217 * The printer now prints less-screwed-up representations of closures
2218 (not naively trying to bogusly use the %FUNCTION-NAME accessor on them).
2219 * A private symbol is used instead of the :EMPTY keyword previously
2220 used to mark empty slots in hash tables. Thus
2221 (DEFVAR *HT* (MAKE-HASH-TABLE))
2222 (SETF (GETHASH :EMPTY *HT*) :EMPTY)
2223 (MAPHASH (LAMBDA (K V) (FORMAT T "~&~S ~S~%" K V)))
2224 now does what ANSI says that it should. (You can still get
2225 similar noncompliant behavior if bang on the hash table
2226 implementation with all the symbols you get back from
2227 DO-ALL-SYMBOLS, but at least that's a little harder to do.)
2228 This breaks binary compatibility, since tests for equality to
2229 :EMPTY are wired into things like the macroexpansion of
2230 WITH-HASH-TABLE-ITERATOR in FASL files produced by earlier
2232 * There's now a minimal placeholder implementation for CL:STEP,
2233 as required by ANSI.
2234 * An obscure bug in the interaction of the normal compiler, the byte
2235 compiler, inlining, and structure predicates has been patched
2236 by setting the flags for the DEFTRANSFORM of %INSTANCE-TYPEP as
2237 :WHEN :BOTH (as per Raymond Toy's suggestion on the cmucl-imp@cons.org
2239 * Missing ordinary arguments in a macro call are now detected even
2240 when the macro lambda list contains &KEY or &REST.
2241 * The debugger no longer complains about encountering the top of the
2242 stack when you type "FRAME 0" to explicitly instruct it to go to
2243 the top of the stack. And it now prints the frame you request even
2244 if it's the current frame (instead of saying "You are here.").
2245 * As specified by ANSI, the system now always prints keywords
2246 as #\: followed by SYMBOL-NAME, even when *PACKAGE* is the
2248 * The default initial SIZE of HASH-TABLEs is now smaller.
2249 * Type information from CLOS class dispatch is now propagated
2250 into DEFMETHOD bodies, so that e.g.
2251 (DEFMETHOD FOO ((X SINGLE-FLOAT))
2253 is now basically equivalent to
2254 (DEFMETHOD FOO ((X SINGLE-FLOAT))
2255 (DECLARE (TYPE SINGLE-FLOAT X))
2257 and the compiler can compile (+ X 123.0) as a SINGLE-FLOAT-only
2258 operation, without having to do run-time type dispatch.
2259 * The macroexpansion of DEFMETHOD has been tweaked so that it has
2260 reasonable behavior when arguments are declared IGNORE or IGNORABLE.
2261 * Since I don't seem to be making big file reorganizations very often
2262 any more (and since my archive of sbcl-x.y.zv.tar.bz2 snapshots
2263 is overflowing my ability to conveniently back them up), I've finally
2264 checked the system into CVS. (The CVS repository is on my home system,
2265 not at SourceForge -- putting it on SourceForge might come later.)
2266 * SB-EXT:*GC-NOTIFY-STREAM* has been added, to control where the
2267 high-level GC-NOTIFY-FOO functions send their output. (There's
2268 still very little control of where low-level verbose GC functions
2269 send their output.) The SB-EXT:*GC-VERBOSE* variable now controls
2270 less than it used to -- the GC-NOTIFY-FOO functions are now under
2271 the control of *GC-NOTIFY-STREAM*, not *GC-VERBOSE*.
2272 * The system now stores the version string (LISP-IMPLEMENTATION-VERSION)
2273 in only one place in the source code, and propagates it automatically
2274 everywhere that it's needed. Thus e.g. when I bump the version from
2275 0.6.6 to 0.6.7, I'll only need to modify the sources in one place.
2276 * The C source files now include boilerplate legalese and documentation
2277 at the head of each file (just as the Lisp source files already did).
2278 * At Dan Barlow's suggestion, the hyperlink from the SBCL website
2279 to his page will be replaced with a link to his new CLiki service.
2281 changes in sbcl-0.6.5 relative to sbcl-0.6.4:
2283 * Raymond Wiker's patches to port the system to FreeBSD have been merged.
2284 * The build process now looks for GNU make under the default name "gmake",
2285 instead of "make" as it used to. If GNU make is not available as "gmake"
2286 on your system, you can change this default behavior by setting the
2287 GNUMAKE environment variable.
2288 * Replace #+SB-DOC with #!+SB-DOC in seq.lisp so that the system
2289 can build without error under CMU CL.
2291 changes in sbcl-0.6.4 relative to sbcl-0.6.3:
2293 * There is now a partial SBCL user manual (with some new text and some
2294 text cribbed from the CMU CL manual).
2295 * The beginnings of a profiler have been added (starting with the
2296 CMU CL profiler and simplifying and cleaning up). Eventually the
2297 main interface should be through the TRACE macro, but for now,
2298 it's still accessed through vaguely CMU-CL-style functions and macros
2299 exported from the package SB-PROFILE.
2300 * Some problems left over from porting CMU CL to the new
2301 cross-compilation bootstrap process have been cleaned up:
2302 ** DISASSEMBLE now works. (There was a problem in using DEFMACRO
2303 instead of SB!XC:DEFMACRO, compounded by an oversight on my
2304 part when getting rid of the compiler *BACKEND* stuff.)
2305 ** The value of *NULL-TYPE* was screwed up, because it was
2306 being initialized before the type system knew the final
2307 definition of the 'NULL type. This screwed up several key
2308 optimizations in the compiler, causing inefficiency in all sorts
2309 of places. (I found it because I wanted to understand why
2310 GET-INTERNAL-RUN-TIME was consing.)
2311 * fixed a bug in DEFGENERIC which was causing it to overwrite preexisting
2312 PROCLAIM FTYPE information. Unfortunately this broke binary
2313 compatibility again, since now the forms output by DEFGENERIC
2314 to refer to functions which didn't exist in 0.6.3.
2315 * added declarations so that SB-PCL::USE-CACHING-DFUN-P
2316 can use the new (as of 0.6.3) transform for SOME into MAP into
2318 * changed (MOD 1000000) type declarations for Linux timeval.tv_usec slot
2319 values to (INTEGER 0 1000000), so that the time code will no longer
2320 occasionally get blown up by Linux returning 1000000 microseconds
2321 * PRINT-UNREADABLE-OBJECT has been tweaked to make the spacing of
2322 its output conform to the ANSI spec. (Alas, this makes its output
2323 uglier in the :TYPE T :IDENTITY NIL case, but them's the breaks.)
2324 * A full call to MAP NIL with a single sequence argument no longer conses.
2325 * fixes to problems pointed out by Martin Atzmueller:
2326 * The manual page no longer talks about multiprocessing as though
2327 it were currently supported.
2328 * The ILISP support patches have been removed from the distribution,
2329 because as of version 5.10.1, ILISP now supports SBCL without us
2330 having to maintain patches.
2331 * added a modified version of Raymond Toy's recent CMU CL patch for
2332 EQUALP comparison of HASH-TABLE
2334 changes in sbcl-0.6.3 relative to sbcl-0.6.2:
2336 * The system still can't cross-compile itself with
2337 *TYPE-SYSTEM-INITIALIZED* (and all the consistency checks that
2338 entails), but at least it can compile more of itself that way
2339 than it used to be able to, and various buglets which were uncovered
2340 by trying to cross-compile itself that way have now been fixed.
2341 * This release breaks binary compatibility again. This time
2342 at least I've incremented the FASL file format version to 2, so that the
2343 problem can be detected reliably instead of just causing weird errors.
2344 * various new style warnings:
2345 ** using DEFUN, DEFMETHOD, or DEFGENERIC to overwrite an old definition
2346 ** using the deprecated EVAL/LOAD/COMPILE situation names in EVAL-WHEN
2347 ** using the lexical binding of a variable named in the *FOO* style
2348 * DESCRIBE has been substantially rewritten. It now calls DESCRIBE-OBJECT
2349 as specified by ANSI.
2350 * *RANDOM-STATE* is no longer automatically initialized from
2351 (GET-UNIVERSAL-TIME), but instead from a constant seed. Thus, the
2352 default behavior of the system is to repeat its behavior every time
2353 it's run. If you'd like to change this behavior, you can always
2354 explicitly set the seed from (GET-UNIVERSAL-TIME); whereas under the
2355 old convention there was no comparably easy way to get the system to
2356 repeat its behavior every time it was run.
2357 * Support for the pre-CLTL2 interpretation of FUNCTION declarations as
2358 FTYPE declarations has been removed, in favor of their ANSI
2359 interpretation as TYPE FUNCTION declarations. (See p. 228 of CLTL2.)
2360 * The quantifiers SOME, EVERY, NOTANY, and NOTEVERY no longer cons when
2361 the types of their sequence arguments can be determined at compile time.
2362 This is done through a new open code expansion for MAP which eliminates
2363 consing for (MAP NIL ..), and reduces consing otherwise, when sequence
2364 argument types can be determined at compile time.
2365 * The optimizer now transforms COERCE into an identity operation when it
2366 can prove that the coerced object is already of the correct type. (This
2367 can be a win for machine generated code, including the output of other
2368 optimization transforms, such as the MAP transform above.)
2369 * Credit information has been moved from source file headers into CREDITS.
2370 * Source file headers have been made more standard.
2371 * The CASE macro now compiles without complaining even when it has
2374 changes in sbcl-0.6.2 relative to sbcl-0.6.1:
2376 * (Note that the way that the PCL macroexpansions were rewritten
2377 to accommodate the change in DEFGENERIC below breaks binary
2378 compatibility. That is, fasl files compiled under sbcl-0.6.1 may
2379 not run under sbcl-0.6.2. Once we get out of alpha releases,
2380 i.e. hit release 1.0.0, we'll probably try to maintain binary
2381 compatibility between maintenance releases, e.g. between sbcl-1.4.3
2382 and sbcl-1.4.4. Until then, however, it might be fairly common
2383 for maintenance releases to break binary compatibility.)
2384 * A bug in the calculation of WARNINGS-P and FAILURE-P in COMPILE-FILE
2386 * The reporting of unhandled signals has been changed to print some
2387 explanatory text as well as the report form. (Previously only
2388 the report form was printed.)
2389 * The macroexpansion for DEFGENERIC now DECLAIMs the function that
2390 it defines, so that the compiler no longer issues undefined function
2391 warnings for compiled-but-not-yet-loaded generic functions.
2392 * The CLTL-style "LISP" and "USER" nicknames for the "COMMON-LISP"
2393 and "COMMON-LISP-USER" packages have been removed. Now only the "CL"
2394 and "CL-USER" standard nicknames from the "11.1.2 Standardized Packages"
2395 section of the ANSI spec are supported.
2396 * The "" nickname for the "KEYWORD" package has been removed.
2397 The reader still handles symbol tokens which begin with a package marker
2398 as keywords, but it doesn't expose its mechanism for doing so in the
2399 (PACKAGE-NICKNAMES (FIND-PACKAGE "KEYWORD")) list.
2400 * The system now issues STYLE-WARNINGs for contradictory TYPE
2401 proclamations. (Warnings for contradictory FTYPE proclamations would
2402 be nice too, but those can't be done usefully unless the type system
2403 is made smarter about FUNCTION types.)
2404 * The names of source files "*host-*.lisp" and "*target-*.lisp" have been
2405 systematized, so that "*target-*.lisp is supposed to exist only on the
2406 target and imply that there's a related file which exists on the
2407 host, and *host-*.lisp is supposed to exist only on the host and imply
2408 that there's a related file which exists on the target. This involves a
2409 lot of renaming. Hopefully the acute confusion caused by the renaming
2410 will be justified by the reduction in chronic confusion..
2411 ** runtime-type.lisp -> early-target-type.lisp
2412 ** target-type.lisp -> late-target-type.lisp
2413 ** early-host-format.lisp -> early-format.lisp
2414 ** late-host-format.lisp -> late-format.lisp
2415 ** host-error.lisp -> misc-error.lisp
2416 ** early-error.lisp -> early-target-error.lisp
2417 ** late-error.lisp -> late-target-error.lisp
2418 ** host-defboot.lisp -> early-defboot.lisp
2419 ** code/misc.lisp -> code/target-misc.lisp
2420 ** code/host-misc.lisp -> code/misc.lisp
2421 ** code/numbers.lisp -> code/target-numbers.lisp
2422 ** code/early-numbers.lisp -> numbers.lisp
2423 ** early-host-type.lisp -> early-type.lisp
2424 ** late-host-type.lisp -> late-type.lisp
2425 ** host-typep.lisp -> typep.lisp
2426 ** load.lisp -> target-load.lisp
2427 ** host-load.lisp -> load.lisp
2428 ** host-disassem.lisp -> disassem.lisp
2429 ** host-insts.lisp -> insts.lisp
2430 ** byte-comp.lisp -> target-byte-comp.lisp
2431 ** host-byte-comp.lisp -> byte-comp.lisp
2432 ** host-signal.lisp -> signal.lisp
2433 ** host-defstruct.lisp -> defstruct.lisp
2434 ** late-target-type.lisp -> deftypes-for-target.lisp
2435 Furthermore, several other previously target-only files foo.lisp (e.g.
2436 hash-table.lisp and random.lisp) have been split into a target-and-host
2437 foo.lisp file and a target-only target-foo.lisp file, with their key type
2438 definitions in the target-and-host part, so that the cross-compiler will
2439 know more about target types.
2440 * DEFSTRUCT BACKEND, and the BACKEND-valued *BACKEND* variable, have
2441 gone away. In their place are various *BACKEND-FOO* variables
2442 corresponding to the slots of the old structure.
2443 * A bug which caused the SB-COLD bootstrap-time package to be propagated
2444 into the target SBCL has been fixed.
2445 * The chill.lisp system for loading cold code into a running SBCL
2447 * Support for the CMU CL "scavenger hook" extension has been removed.
2448 (It was undocumented and unused in the CMU CL sources that SBCL was
2449 derived from, and stale in sbcl-0.6.1.)
2450 * Various errors in the cross-compiler type system were detected
2451 by running the cross-compiler with *TYPE-SYSTEM-INITIALIZED*
2452 (enabling various consistency checks). Many of them were fixed,
2453 but some hard problems remain, so the compiler is back to
2454 running without *TYPE-SYSTEM-INITIALIZED* for now.
2455 * As part of the cross-compiler type system cleanup, I implemented
2456 DEF!TYPE and got rid of early-ugly-duplicates.lisp.
2457 * I have started adding UNCROSS calls throughout the type system
2458 and the INFO database. (Thus perhaps eventually the blanket UNCROSS
2459 on cross-compiler input files will be able to go away, and various
2461 * CONSTANTP now returns true for quoted forms (as explicitly required
2464 changes in sbcl-0.6.1 relative to sbcl-0.6.0:
2466 * changed build optimization from (SAFETY 1) to (SAFETY 3) as a short-term
2467 fix for various type-unsafety bugs, e.g. failures with (LENGTH 123) and
2468 (MAKE-LIST -1). In the longer term, it ought to become true
2469 that declarations are assertions even at SAFETY 1. For now, it's not
2470 quite true even at SAFETY 3, but it's at least more nearly true..
2471 (Note that this change seems to increases the size of the system by
2472 O(5%) and to decrease the speed of the compiler by 20% or more.)
2473 * changed ALIEN printing to be much more abbreviated, as a short-term fix
2474 for the problem of printing dozens of lines of distracting information
2475 about low-level system machinery as part of the top stack frame
2476 on entry to the debugger when an undefined function was called.
2477 * tweaked the debugger's use of WITH-STANDARD-IO-SYNTAX so that *PACKAGE*
2478 is not reset to COMMON-LISP-USER.
2479 * Compilation of stuff related to dyncount.lisp has been made conditional
2480 on the :SB-DYNCOUNT target feature, so that the ordinary core system is
2481 smaller. The various dyncount-related symbols have been moved into
2482 a new "SB-DYNCOUNT" package.
2483 * tty-inspect.lisp has been renamed to inspect.lisp.
2484 * unix-glibc2.lisp has been renamed to unix.lisp, and the :GLIBC2
2485 feature has gone away. (When we eventually port to other flavors of
2486 libc and/or Unix, we'll try to make the differences between flavors
2487 invisible at the user level.)
2488 * Various other *FEATURES* tags, and/or their associated conditionals,
2489 have been removed if obsolescent, or given better documentation, or
2490 sometimes given more-mnemonic names.
2492 changes in sbcl-0.6.0 relative to sbcl-0.5.0:
2494 * tidied up "make.sh" script
2495 * tidied up system directory structure
2496 * better "clean.sh" behavior
2497 * added doc/FOR-CMUCL-DEVELOPERS
2498 * many many small tweaks to output format, e.g. removing possibly-confusing
2499 trailing #\. character in DESCRIBE-INSTANCE
2500 * (EQUALP #\A 'A) no longer signals an error.
2501 * new hashing code, including EQUALP hashing
2502 * tidied up Lisp initialization and toplevel
2503 * initialization files (e.g. /etc/sbclrc and $HOME/.sbclrc)
2504 * command line argument processing
2505 * added POSIX-GETENV function to deal with Unix-ish environment variables
2506 * more-Unixy handling of *STANDARD-INPUT* and other Lisp streams, e.g.
2507 terminating SBCL on EOF
2508 * non-verbose GC by default
2509 * There is no more "sbcl" shell script; the sbcl file is now the C
2510 runtime executable (just like CMU CL).
2511 * removed some unused fops, e.g. FOP-UNIFORM-VECTOR, FOP-CHARACTER, and
2513 * tweaked debug-info.lisp and debug-int.lisp to make the debugger store
2514 symbol and package information as Lisp native symbol and package objects
2515 instead of strings naming symbols and strings naming packages. This way,
2516 whenever packages are renamed (as in warm init), debug information is
2517 transformed along with everything else.
2518 * tweaked the optimization policy declarations which control the building
2519 of SBCL itself. Now, among other things, the system no longer saves
2520 source location debugging information. (This helps two problems at once
2521 by reducing SBCL size and by keeping SBCL from trying to look for its
2522 sources -- which may not exist -- when reporting errors.)
2523 * added src/cold/chill.lisp, to let SBCL read its own cold sources for
2524 debugging and testing purposes
2525 * cleaned up printing, making the printer call PRINT-OBJECT for
2526 instances, and using PRINT-UNREADABLE-OBJECT for most PRINT-OBJECT
2527 methods, giving nearly-ANSI behavior
2528 * converted almost all special variables to use *FOO* naming convention
2529 * deleted PARSE-TIME functionality, since it can be done portably
2530 * moved some files out of cold init into warm init
2531 * deleted DEFUN UNDEFINED-VALUE, replaced (UNDEFINED-VALUE) forms
2533 * regularized formatting of source files
2534 * added an install.sh script
2535 * fixed ridiculous memory usage of cross-compiler by making
2536 compiler/alloc.lisp not try to do pooling unless it can hook
2537 itself into the GC of the cross-compilation host. Now the system
2538 builds nicely on my old laptop.
2539 * added :SB-ALLOC in target-features.lisp-expr
2540 * deleted mention of :ANSI-DOC from target-features.lisp-expr (since it
2541 was not implemented)
2542 * re-did condition handling and note reporting in the compiler. Notes
2543 are no longer handled by signalling conditions. Style warnings
2544 and warnings are handled more correctly and reported in such a way
2545 that it's easy to find one or the other in your output (so that you
2546 can e.g. figure out which of many problems caused COMPILE-FILE to
2548 * changed the severity of several compiler warnings from full WARNING
2549 to STYLE-WARNING in order to conform with the ANSI spec; also changed
2550 compiler note reporting so that it doesn't use the condition system
2551 at all (and hence affects neither FAILURE-P nor WARNINGS-P in the
2552 COMPILE-FILE command)
2553 * made PROCLAIM and DECLAIM conform to ANSI. PROCLAIM is now an ordinary
2554 function. As a consequence, START-BLOCK and END-BLOCK declarations are
2555 no longer supported, since their implementation was deeply intertwingled
2556 with the magical, non-ANSI treatment that PROCLAIM received in CMU CL.
2557 * removed bogus "support" for compiler macros named (SETF FOO), and
2558 removed the compiler macro for SETF INFO (but only after making a fool
2559 of myself on the cmucl-imp mailing list by posting a bogus patch for
2560 DEFINE-COMPILER-MACRO..)
2561 * Compiled files containing forms which have side effects on the Lisp
2562 reader (such as DEFPACKAGE forms) are now handled more correctly.
2563 (Compiler queuing of top level lambdas has been suppressed by setting
2564 *TOP-LEVEL-LAMBDA-MAX* to 0. )
2565 * deleted various currently-unused source files, e.g. gengc.lisp. They
2566 may be added back at some point e.g. when porting to other architectures,
2567 but until they are it's distracting to distribute them and to try to
2569 * deleted "UNCROSS couldn't recurse through.." style warnings, since
2570 there were so many of them they're just distractions, and UNCROSS is
2571 known to be able to handle the current sources
2572 * moved PROFILE functionality into TRACE, so that it will be clear
2573 how the wrapping and unwrapping of functions when you profile them
2574 interacts with the wrapping and unwrapping of functions when you
2575 trace them. (Actually, the functionality isn't there yet, but at least
2576 the interface specification is there. Hopefully, the functionality will
2577 arrive with some future maintenance release.)
2578 * removed host-oops.lisp
2579 * changed signature of QUIT function to allow UNIX-CODE argument
2580 * fixed READ-SEQUENCE bug
2581 * tweaked verbose GC output so that it looks more like the progress
2582 output that ANSI specifies for functions like LOAD
2583 * set up the system on sourceforge.com, with home pages, mailing lists, etc.
2584 * added <http://sbcl.sourceforge.com> to the banner information printed by