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1 ========================== C M U C L 19 a =============================
2
3 [--- WORK IN PROGRESS --- DO NOT DISTRIBUTE ---]
4
5 The CMUCL project is pleased to announce the release of CMUCL 19a.
6 This is a major release which contains numerous enhancements and
7 bugfixes from the 18e release.
8
9 CMUCL is a free, high performance implementation of the Common Lisp
10 programming language which runs on most major Unix platforms. It
11 mainly conforms to the ANSI Common Lisp standard. CMUCL provides a
12 sophisticated native code compiler; a powerful foreign function
13 interface; an implementation of CLOS, the Common Lisp Object System,
14 which includes multimethods and a metaobject protocol; a source-level
15 debugger and code profiler; and an Emacs-like editor implemented in
16 Common Lisp. CMUCL is maintained by a team of volunteers collaborating
17 over the Internet, and is mostly in the public domain.
18
19 New in this release:
20
21 * Feature enhancements:
22 - Stack overflow checking added for FreeBSD/x86, Linux/x86 and
23 Solaris. Code that makes the control stack overflow (for
24 example due to unbounded recursion) will lead to a
25 STORAGE-ERROR being signaled, instead of making CMUCL crash.
26 - LISP:FIND-CLASS and LISP:CLASS-OF now return CLOS classes. The
27 symbols LISP:STANDARD-CLASS, LISP:BUILT-IN-CLASS, and
28 LISP:STRUCTURE-CLASS name CLOS classes. It is no longer
29 necessary to SHADOWING-IMPORT these from PCL when doing MOP
30 programming, and it fixes some non-compliances as well.
31 - Package locks: a package whose EXT:PACKAGE-LOCK is enabled
32 non-NIL is protected against changes in its structure (list of
33 exported symbols, use-list etc). Symbols in a package whose
34 EXT:PACKAGE-DEFINITION-LOCK is enabled are protected against
35 redefinition.
36 - Weak hash tables have been added for x86 systems.
37 - Local functions are now named (FLET <name> ...) or
38 (LABELS <name> ...).
39 - Compiler checking control string and number of args to FORMAT,
40 ERROR and WARN.
41 - TRACE automatically using encapsulation when function-end
42 breakpoints cannot be used.
43 - INSPECT working on CLOS instances.
44 - Callbacks from foreign code to Lisp. Implemented for x86 and
45 sparc.
46 - Functions like GETHASH that are used in the implementation of
47 TRACE can now be traced. See also
48 DEBUG:*TRACE-ENCAPSULATE-PACKAGE-NAMES*.
49 - New facility for encapsulating functions, FWRAPPERS;
50 see also the CMUCL User Manual.
51 - TRACE and PROFILE have been reimplemented using fwrappers,
52 with the effect of tracing and profiling now working more
53 nicely together.
54 - When a profiled function is redefined, it is re-profiled.
55 - A basic implementation of simple-streams added. Some
56 functionality may be missing.
57 - UNIX:UNIX-LSEEK working with files > 2G on BSDs.
58 - Type declarations on local bindings of special variables no
59 longer being ignored.
60 - DISASSEMBLE disassembling closure/funcallable instance
61 functions.
62 - (SETF EXT:WEAK-POINTER-VALUE) has been added.
63 - CMUCL no longer entering an infinite loop when dumping
64 circular constant lists to fasl files.
65 - COMPILE-FILE-PATHNAME's BYTE-COMPILE keyword arg defaulting
66 to *BYTE-COMPILE-DEFAULT* like COMPILE-FILE.
67 - Added VOPs for CHAR=, CHAR<, and CHAR> when the second arg is a
68 constant character.
69 - Added missing VOPs for Sparc for array refs with a constant
70 index.
71 - Lisp binary will also look at the PATH envvar to find out it's
72 own location which is used to find other needed files.
73 - Byte-compiled code being executed ca. 1/3 faster.
74 - Heap overflow checking for x86 and solaris with gencgc. When
75 the heap is close to overflowing, a heap-overflow condition is
76 signaled. If an overflow happens again while debugging the
77 condition, the user is returned to top-level without warning.
78 Use lisp::*reserved-heap-pages* to set the number of pages to
79 reserve.
80
81 * Numerous ANSI compliance fixes:
82 - Many bugs in CMUCL's type system detected by Paul Dietz'
83 ANSI test suite have been fixed.
84 - Non-keyword keyword names in lambda lists are now accepted.
85 - Condition slot initialization fixed for the case that two
86 or more slots have the same :INITARG.
87 - Initforms are now evaluated once only during condition slot
88 initialization.
89 - USE-VALUE, STORE-VALUE, CONTINUE behavior corrected in presence
90 of multiple restarts having the same name.
91 - RESTART-CASE's interaction with local macros fixed.
92 - Interaction of COMPUTE-RESTARTS and RESTART-CASE fixed in
93 presence of multiple restarts having the same name.
94 - Condition slot readers/writers are generic functions.
95 - &WHOLE, &REST, &BODY in macro lambda lists can be followed
96 by destructuring patterns. The previous behavior of &BODY
97 when followed by (<body> <declarations> <doc>) is available
98 through the new lambda-list keyword EXT:&PARSE-BODY.
99 - ELT now signals an error in safe code when used on lists
100 with an out-of-bounds index.
101 - Accessing arrays in compiled code with out-of-bounds indices
102 now signals a TYPE-ERROR.
103 - DECLARE no longer being a special operator.
104 - DEFINE-CONDITION accepts slot option :DOCUMENTATION.
105 - Behavior of (... &KEY &ALLOW-OTHER-KEYS) fixed for
106 DESTRUCTURING-BIND and macros.
107 - Stricter checking of keyword argument list in CLOS methods.
108 - &ENVIRONMENT variable bound bound before other vars, regardless
109 of where it appears in a lambda-list.
110 - VALUES types no longer accepting &KEY or &ALLOW-OTHER-KEYS.
111 - THE conforming to ANSI.
112 - SLOT-EXISTS-P can be used with conditions.
113 - REMOVE-METHOD always returning the generic function passed to it.
114 - Standard methods for STANDARD-OBJECT and STRUCTURE-OBJECT
115 defined on MAKE-LOAD-FORM.
116 - Compliant MAKE-LOAD-FORM-SAVING-SLOTS.
117 - DEFSTRUCT recording slot-names as specified by users.
118 - Generic function call keyword argument checking according to
119 ANSI 7.6.5.
120 - CALL-NEXT-METHOD without arguments being called with original
121 arguments when method parameters are changed with SETQ.
122 - When CALL-NEXT-METHOD is called with arguments, an error is
123 signaled in safe code when the set of methods applicable to
124 CALL-NEXT-METHOD's arguments is different from the set of
125 methods applicable to the original method arguments.
126 - FIND-METHOD signaling an error when called with specializers
127 not corresponding to the number of required arguments of the
128 supplied generic function.
129 - TYPE-OF returning KEYWORD for keywords, STANDARD-CHAR for
130 standard characters, BOOLEAN for T, (INTEGER <N> <N>) for
131 integers N, non-list types for functions, and CLOS classes for
132 instances whose class doesn't have a proper name.
133 - Class precedence list of NULL not having SYMBOL before LIST,
134 precedence list of STANDARD-METHOD not having METHOD before
135 STANDARD-OBJECT.
136 - ADD-METHOD returning its first argument, the generic function.
137 - DEFCLASS redefining a class with the given name only if the
138 name is the proper name of an existing class.
139 - KEYWORD package no longer having nickname "".
140 - COMMON-LISP-USER package no longer having nickname USER.
141 - COMMON-LISP package no longer having nickname LISP; LISP
142 and COMMON-LISP are now separate packages.
143 - SLOT-VALUE, (SETF SLOT-VALUE), SLOT-BOUNDP, SLOT-MAKUNBOUND
144 returning values specified by the standard when SLOT-UNBOUND
145 or SLOT-MISSING are called and return.
146 - NTH and NTHCDR accepting bignums as first argument.
147 - First arg of CERROR may be a function.
148 - Lambda-lists of the form (X . Y) in DESTRUCTURING-BIND and macros
149 are now equivalent to (X &REST Y).
150 - LAST, BUTLAST, NBUTLAST accepting bignum counts.
151 - WITH-OUTPUT-TO-STRING accepting :ELEMENT-TYPE.
152 - FIXNUM no longer naming a function.
153 - MAKE-STRING-OUTPUT-STREAM accepts :ELEMENT-TYPE.
154 - Numerous LOOP fixes.
155 - On FreeBSD, CLtS-required floating-point conditions are signaled.
156 - PARSE-INTEGER skipping over whitespace after a number.
157
158 * Numerous bugfixes:
159 - NSET-EXCLUSIVE-OR returns the same results as SET-EXCLUSIVE-OR
160 wrt to duplicate elements.
161 - Forms like (MULTIPLE-VALUE-BIND 'LIST) no longer trapping
162 an internal compiler error when compiled.
163 - PARSE-INTEGER signaling PARSE-ERROR.
164 - Compiler eliminating some type checks in safe code.
165 - Byte-compiler and -interpreter not handling C:&MORE.
166 - Some TYPE-ERRORs being signaled with unbound slots, which
167 made them undisplayable.
168 - Structure predicates no longer signaling an error when applied
169 to obsolete instances.
170 - A DEFTRANSFORM for array bounds checking had an off-by-1 error.
171 - Compiler was not properly deriving the type of FTRUNCATE in all
172 cases.
173 - Fixed error wherein certain uses of 2 arg ATAN caused a
174 compiler error on x86.
175 - Compiler wrongly signaling a type error in VOLATILE-INFO-LOOKUP or
176 COMPACT-INFO-LOOKUP for hash values equal to MOST-POSITIVE-FIXNUM.
177 - FFLOOR and FCEILING return types sometimes being inferred as
178 being the nil type.
179 - PARSE-TIME accepting GMT offsets with a leading plus sign.
180 - UNIX-MMAP not accepting a null fd, preventing anonymous
181 mappings.
182 - SIGPROF having the wrong value on GNU/Linux.
183 - Wrong byte-code being generated for (APPLY #'+ <X> <Y>) and
184 similar cases.
185 - GCD sometimes returning a negative value.
186 - LCM sometimes returning a negative value, or signaling division-by-zero.
187 - FLOAT in sometimes returning a float of the wrong type.
188 - ROOM should handle the large heaps now without overflowing
189 internal counters or signaling type errors. Columns should
190 line up better too.
191 - READ-SEQUENCE was returning too soon when reading from files
192 into simple-strings even though there were data available.
193
194 * Other changes:
195 - CREATE-REQUEST-SERVER has an additional :reuse-address keyword
196 argument.
197 - Removed obsolete alias from MAKE-VECTOR to MAKE-ARRAY
198 - the signature of *COMPILER-NOTIFICATION-FUNCTION* has changed;
199 it now has an extra argument that describes the nature of the
200 error or warning.
201 - File versioning occurs when the version component is :NEWEST,
202 and Emacs style file versions are created: foo.bar.~N~, where
203 the larger N is newer. foo.bar is the newest version.
204 - Converting namestrings to pathnames now get a version component
205 of NIL instead of :NEWEST.
206 - *DEFAULT-PATHNAME-DEFAULTS* has a version component of
207 :UNSPECIFIC instead of :NEWEST so versioning is disabled by
208 default to preserve current behavior. Set the version to
209 :NEWEST to create versions.
210 - LDB backtrace on x86.
211 - DYNAMIC-EXTENT support on x86 and sparc. Stack-allocation can
212 be controlled by the setting of
213 EXT:*TRUST-DYNAMIC-EXTENT-DECLARATIONS*. See also the CMU User
214 Manual. Be warned that all bets are off if a stack-allocated
215 object or parts of it escape; CMUCL might crash or format your
216 hard disk.
217 - Generational GC (gencgc) available for Sparc/Solaris on an
218 experimental basis. Despite the name and feature, it is not
219 conservative.
220 - Search in /usr/lib/cmucl for the lisp core file as well, to
221 support x86/Linux
222 - The trap for floating-point underflow is turned off by default
223 for all platforms now.
224
225 * Numerous improvements to the PCL implementation of CLOS:
226 - Gerd's PCL has been added, which fixes numerous bugs and ANSI/
227 AMOP non-compliances, and adds various new optimizations (also
228 see the CMU User Manual).
229 - PCL's class hierarchy has been changed to conform to AMOP, for
230 instance, GENERIC-FUNCTION is now a subclass of
231 STANDARD-OBJECT.
232 - ENSURE-CLASS-USING-CLASS's argument list has been changed
233 to conform to AMOP.
234 - COMPUTE-EFFECTIVE-SLOT-DEFINITION now takes a slot name as
235 argument, for AMOP compliance.
236 - SUBTYPEP works in presence of forward-referenced classes.
237 - Accessing slots of specialized parameters in (SETF
238 SLOT-VALUE-USING-CLASS) methods works.
239 - DIRECT-SLOT-DEFINITION-CLASS and EFFECTIVE-SLOT-DEFINITION-CLASS
240 AMOP compliant.
241 - ALLOCATE-INSTANCE working with structures defined with DEFSTRUCT.
242 - With (DEFGENERIC FOO (&REST X &KEY)) (DEFMETHOD FOO (&REST X) X),
243 (FOO 1) now signals an error.
244 - Methods with &OPTIONAL arguments detecting too many args.
245 - DEFMETHOD and DEFGENERIC detecting doubled lambda variables.
246 - DEFGENERIC :ARGUMENT-PRECEDENCE-ORDER option checking.
247 - SLOT-VALUE, (SETF SLOT-VALUE), SLOT-BOUNDP working with conditions.
248 - (SETF SLOT-VALUE) working on read-only structure slots like
249 in other implementations.
250 - The declaration identifiers SLOTS, AUTO-COMPILE,
251 NOT-AUTO-COMPILE have been moved from PCL to EXT.
252 - Support for inlineing methods in effective methods; see the
253 CMU User Manual.
254 - Wrong results could be returned from generic functions when
255 all methods returned constant values, and some methods were
256 qualified, or the generic function didn't use the standard
257 method combination.
258 - For standard method combination and method combinations defined
259 with the short form of DEFINE-METHOD-COMBINATION: If there are
260 no applicable primary methods when a generic function is
261 called, the generic function PCL:NO-PRIMARY-METHOD is called.
262 The default method of this generic function signals a
263 continuable error of type PCL:NO-PRIMARY-METHOD-ERROR.
264 - Effective methods are no longer precomputed at method load
265 time, if the generic function has more than
266 PCL:*MAX-EMF-PRECOMPUTATION-METHODS* methods (default 100).
267 - The loading of methods with invalid qualifiers no longer
268 signals an error, for standard's conformance. Instead, a
269 warning is printed at method load time. An error is
270 signaled if the generic function is called with arguments such
271 that the method is used.
272 - Redefining a generic function with a different method
273 combination now recomputes effective methods.
274
275 * Improvements to Hemlock, the Emacs-like editor:
276
277 * Changes to rebuilding procedure:
278 - When rebuilding CMUCL, *features* do not need to be set by
279 hand. As files are loaded, the appropriate *features* are set
280 so that the resulting build has the same set of *features*.
281 There should also be fewer warnings about internals.h changing,
282 since that now just contains things in sys:*runtime-features*.
283 Use sys:register-lisp-feature and
284 sys:register-lisp-runtime-feature to set *features* and
285 sys:*runtime-features*, respectively.
286 - Pierre Mai's build-tools have been incorporated. The scripts
287 are in the src/tools directory. These are slightly modified
288 versions of his scripts. Should make building CMUCL easier.
289 * Deprecated features:
290 - EXT:ENCAPSULATE and associated functions; use fwrappers instead.
291
292 This release is not binary compatible with code compiled using CMUCL
293 18e; you will need to recompile FASL files.
294
295 See <URL:http://www.cons.org/cmucl/> for download information,
296 guidelines on reporting bugs, and mailing list details.
297
298
299 We hope you enjoy using this release of CMUCL!
300

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