Tags

sbcl_0_7_14

changes in sbcl-0.7.14 relative to sbcl-0.7.13:
  * a better implementation of SXHASH on (simple) bit vectors,
    measured both in execution speed and in distribution of results
    over the positive fixnums, has been installed.  Likewise, a better
    implementation of EQUAL for simple bit vectors is now available.
  * fixed CEILING optimization for a divisor of form 2^k.
  * fixed bug 240 (emitting extra style warnings "using the lexical
    binding of the symbol *XXX*" for &OPTIONAL arguments).  (reported
    by Antonio Martinez)
  * fixed SXHASH, giving different results for NIL depending on type
    declarations (SYMBOL or LIST).  (thanks to Gerd Moellmann)
  * fixed bug in DEFPARAMETER and DEFVAR: they could assign a lexical
    variable.  (found by Rolf Wester)
  * SBCL does not ignore type declarations for special
    variables.  (reported by rif on c.l.l 2003-03-05)
  * some bug fixes in contrib/sb-aclrepl/
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** a bug in the CONS type specifier, whereby the CAR and CDR
       types got intertwined, has been fixed;
    ** the type system is now able to reason about the interaction
       between INTEGER and RATIO types more completely;
    ** APPEND, [N]REVERSE and NRECONC check that those their
       arguments, which must be proper lists, are really so;
    ** An array specialized to be unable to hold elements has been
       implemented, as required -- yes, really -- by ANSI;
    ** GETF and GET-PROPERTIES throw a TYPE-ERROR, not a SIMPLE-ERROR,
       on malformed property lists;

dan.native.threads.3

dan_native_threads_3

sbcl_0_7_13

changes in sbcl-0.7.13 relative to sbcl-0.7.12:
  * incompatible packaging change: in line with Unix convention,
    SBCL now looks for its core file in /usr/{local/,}lib/sbcl/sbcl.core
    if it's not in $SBCL_HOME.  It also sets SBCL_HOME to match.
  * REQUIRE and PROVIDE are now optionally capable of doing something
    useful. See the documentation string for REQUIRE.
  * infrastructure for a managed SBCL contrib system: contributed
    modules in this release include:
    ** the ASDF system definition facility;
    ** an interface to the BSD Sockets API;
    ** an ACL-like convenience interface to the repl;
       (thanks to Kevin Rosenberg)
    ** an implementation of ROTATE-BYTE, with efficient implementation
       on x86 hardware;
  * fixed a bug in LOG, so that LOG of a rational argument near 1 now
    gives a closer approximation to the right answer than previously.
    (thanks to Raymond Toy)
  * fixed bug 157: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE and
    UPGRADED-COMPLEX-PART-TYPE now take (ignored, in all situations)
    optional environment arguments, as required by ANSI.
  * fixed bugs in other functions taking environment objects, allowing
    calls with an explicit NIL environment argument to be compiled
    without error.
  * fixed bug 228: primary return values from
    FUNCTION-LAMBDA-EXPRESSION are either NIL or suitable for input to
    COMPILE or FUNCTION.
  * fixed a bug in DEFSTRUCT: predicates for :NAMED structures with
    :TYPE will no longer signal errors on innocuous objects.
  * fixed bug 231b: SETQ is better at respecting type declarations in
    the lexical environment.
  * fixed a bug in DEFCLASS: classes named by symbols with no or
    unprintable packages can now be defined.
  * fixed a bug in RESTART-BIND: The :TEST-FUNCTION option had been
    carelessly renamed to :TEST-FUN.  (thanks to Robert E. Brown)
  * fixed compiler failure related to checking types of functions.
    (reported by Robert E. Brown)
  * the compiler is now much more consistent in its error-checking
    treatment of bounding index arguments to sequence functions: in
    (SAFETY 3) code, errors will be signalled in almost all cases if
    invalid sequence bounding indices are passed to functions defined
    by ANSI to operate on sequences.
  * fixed a bug in the build procedure: documentation of SBCL-specific
    packages is now preserved and available in the final Lisp image.
  * lifted FDEFINITION lookup out of loops in the implementation of
    many list operations.  (thanks to Robert E. Brown)
  * fixed a bug in the reader: the #n# reader macro now works for
    objects of type STANDARD-OBJECT.  (reported by Tony Martinez)
  * the compiler is now aware that SYMBOL-FUNCTION returns a FUNCTION
    and that READ-DELIMITED-LIST returns a LIST.  (thanks to Robert
    E. Brown and Tony Martinez respectively)
  * PCL is now smarter about SLOT-VALUE, (SETF SLOT-VALUE) and
    SLOT-BOUNDP: in particular, it is now able to optimize them much
    better, and is now not vulnerable to having packages renamed.
    Furthermore, a compliance bug has been fixed: SLOT-MISSING is now
    always called when a slot is not present in an instance.  (thanks
    to Gerd Moellmann)
  * fixed a bug related to CONCATENATED-STREAMs: PEEK-CHAR will no
    longer signal an error on unreading a character following EOF on
    the previous constituent stream.  (thanks to Tony Martinez)
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** ARRAY-IN-BOUNDS-P now allows arbitrary integers as arguments,
       not just nonnegative fixnums;
    ** the logical bit-array operators such as BIT-AND now accept an
       explicit NIL for their "opt-arg" argument (to indicate a
       freshly-consed result bit-array);
    ** ELT now signals an error on an invalid sequence index in safe
       code;
    ** the type system is now cleverer about negations of numeric
       types, and consequently understands the BIGNUM and RATIO types
       better;
    ** the type system is now cleverer about the interaction between
       INTEGER and RATIO types: while bugs still remain, many more
       cases are accurately computed;
    ** in TYPECASE, OTHERWISE now only introduces an otherwise-clause
       if it is in the last clause;
    ** CONSTANTLY now correctly returns a side-effect-free function in
       all cases;
    ** DECLARE is no longer treated as a special-operator; in
       particular, SPECIAL-OPERATOR-P no longer returns T for DECLARE;
  * incremented fasl file version number due to the change in the
    DEFSTRUCT-SLOT-DESCRIPTION structure.

sbcl_0_7_12

changes in sbcl-0.7.12 relative to sbcl-0.7.11:
  * minor incompatible change: code processed by the "interpreter" or
    EVAL now has a compilation optimization policy of (DEBUG 2)
    (changed from (DEBUG 1)) to improve debuggability of interactive
    development, and to allow the use of the debug RETURN command in
    such code.
  * an experimental implementation of the RETURN command for the
    debugger has been included.  (thanks to Frederik Kuivinen)
  * fixed bug 62: constraints were not propagated into a loop.
  * fixed bug in embedded calls of SORT (reported and investigated by
    Wolfgang Jenkner).
  * fixed some bugs revealed by Paul Dietz' test suite:
    ** printing and reading of arrays with some dimensions having
       length 0 (thanks to Gerd Moellmann);
    ** BOA constructor with &AUX argument without a default value does
       not cause a type error;
    ** CONSTANTP now returns true for all self-evaluating objects.

sbcl_0_7_11

changes in sbcl-0.7.11 relative to sbcl-0.7.10:
  * fixed bug 127: DEFSTRUCT now does not clobber old structure
    accessors that are related by inheritance, as specified in the
    :CONC-NAME section of the specification of DEFSTRUCT.  (thanks to
    Valtteri Vuorikoski)
  * The compiler is now able to inline functions that were defined in
    a complex lexical environment (e.g. inside a MACROLET).
  * fixed bug in DESCRIBE, which now works on rank-0 arrays.  (thanks
    to Lutz Euler)
  * Support for the upcoming FreeBSD-5.0 release has been included.
    (thanks to Dag-Erling Smorgrav)
  * fixed bug 219: DEFINE-COMPILER-MACRO no longer has compile-time
    effect when it is not in a toplevel context.
  * fixed bug 222: DEFMETHOD and SYMBOL-MACROLET interactions now
    stand a better chance of being correct.  (thanks to Gerd
    Moellmann)
  * fixed bug in COERCE, which now signals an error on coercing a
    rational to a bounded real type which excludes the expected
    answer.
  * The compiler is now able to derive types more accurately from the
    COERCE and COMPILE functions.
  * fixed bug 223: functional binding is considered to be constant
    only for symbols in the CL package.
  * fixed bug 231: SETQ did not check the type of a variable being set
    (reported by Robert E. Brown)
  * A new optimization for MAKE-INSTANCE has been included, fixing
    various bugs (including relating to :ALLOCATION :CLASS slots and
    :DEFAULT-INITARGS over-eager evalueation).  (thanks to Gerd
    Moellmann)
  * fixed some LOOP bugs revealed by Paul Dietz' test suite:
    ** As required by ANSI, LOOP now disallows anonymous collection
       clauses such as COLLECT I in conjunction with aggregate boolean
       clauses such as THEREIS (= I 1);
    ** LOOP now signals an error when any variable is reused in the
       same loop (including the potentially useful construct analogous
       to WITH A = 1 WITH A = (1+ A);
    ** IT is only a special loop symbol within the first clause of a
       conditional loop clause;
    ** LOOP with a typed iteration variable over a hashtable now
       signals a type error iff it should.
  * fixed some other bugs revealed by Paul Dietz' test suite:
    ** FILE-STREAM now names the class previously known as FD-STREAM;
    ** in DEFSTRUCT, a bare :CONC-NAME (or a :CONC-NAME with no
       argument) no longer signals an error;
    ** likewise in DEFSTRUCT, :CONC-NAME NIL now respects the package
       of the slot symbol, rather than using the current package
       ((:CONC-NAME "") continues to intern the slot's name in the
       current package);
  * incremented fasl file version number, because of the incompatible
    change to the DEFSTRUCT-DESCRIPTION structure, and again because
    of the new implementation of DEFINE-COMPILER-MACRO.

sbcl_0_7_10

changes in sbcl-0.7.10 relative to sbcl-0.7.9:
  * Support for building SBCL for MIPS platforms running in
    little-endian mode has now been checked in, and basic
    functionality on said platforms verified.
  * minor incompatible change: PCL now records the pathname of a file
    in which methods and the like are defined, rather than its
    truename.
  * minor incompatible change: TRUENAME now considers the truename of
    a file naming a directory to be the pathname with :DIRECTORY
    component indicating that directory.
  * minor incompatible change: a NAMED clause in the extended form of
    LOOP no longer causes a BLOCK named NIL to surround the LOOP.  The
    reason for the previous behaviour is unclear.
  * more systematization and improvement of CLOS and MOP conformance
    in PCL (thanks to Gerd Moellman and Pierre Mai):
    ** the standard ANSI CL generic function NO-NEXT-METHOD is now
       implemented;
    ** DEFINE-METHOD-COMBINATION no longer signals an error for
       primary methods with no specializers;
    ** the MOP generic function GENERIC-FUNCTION-DECLARATIONS is now
       implemented;
    ** the Readers for Class Metaobjects methods CLASS-DIRECT-SLOTS
       and CLASS-DIRECT-DEFAULT-INITARGS have been implemented for
       FORWARD-REFERENCED-CLASSes; error reporting on
       CLASS-DEFAULT-INITARGS, CLASS-PRECEDENCE-LIST and CLASS-SLOTS
       has been improved;
    ** SXHASH on CLOS instances now uses a slot internal to the
       instance to return different numbers on distinct instances,
       while preserving the same return value through invocations of
       CHANGE-CLASS;
    ** DEFMETHOD signals errors when methods with longer incongruent
       lambda lists are added to generic functions;
    ** COMPUTE-CLASS-PRECEDENCE-LIST now has a method specialized on
       CLASS, as specified in AMOP;
    ** COMPUTE-SLOTS :AROUND now assigns locations sequentially based
       on the order returned by the primary method for classes of
       class STANDARD-CLASS;
    ** DEFINE-METHOD-COMBINATION now works with the :ARGUMENTS option.
  * fixed some bugs shown by Paul Dietz' test suite:
    ** DOLIST puts its body in TAGBODY;
    ** SET-EXCLUSIVE-OR sends arguments to :TEST function in the
       correct order;
    ** MULTIPLE-VALUE-SETQ evaluates side-effectful places before
       value producing form;
    ** if more variables are given to PROGV than values, extra
       variables are bound and made to have no value;
    ** NSUBSTITUTE on list arguments gets the right answer with
       :FROM-END;
    ** ELT signals an error of type TYPE-ERROR when the index argument
       is not a valid sequence index;
    ** LOOP signals (at macroexpansion time) an error of type
       PROGRAM-ERROR when duplicate variable names are found;
    ** LOOP supports DOWNTO and ABOVE properly; (thanks to Matthew Danish)
    ** FUNCALL of special-operators now cause an error of type
       UNDEFINED-FUNCTION;
    ** PSETQ now works as required in the presence of side-effecting
       symbol-macro places;
    ** NCONC accepts any object as its last argument;
    ** :COUNT argument to sequence functions may be BIGNUM; (thanks to
       Gerd Moellman)
    ** loop-for-as-package does not require a package to be explicitely
       specified;
    ** LOOP WITH now treats NIL in the d-var-spec correctly as an
       ignored binding.
  * fixed bug 166: compiler preserves "there is a way to go"
    invariant when deleting code.
  * fixed bug 172: macro lambda lists with required arguments after
    &REST arguments now cause an error to be signalled.  (thanks to
    Matthew Danish)
  * fixed Entomotomy PEEK-CHAR-WRONGLY-ECHOS-TO-ECHO-STREAM
    bug. (thanks to Matthew Danish)
  * fixed bug 225: STRING-STREAM is now a class. (reported by Gilbert
    Baumann)
  * fixed bug 136: CALL-NEXT-METHOD no longer gets confused when
    arguments are lexically rebound. (thanks to Gerd Moellmann and
    Pierre Mai)
  * fixed bug 194: error messages are now more informative when there
    is no primary method applicable in a call to a generic
    function. (thanks to Gerd Moellmann)
  * fixed bug in command line argument checking (thanks to Julian
    Fondren)
  * fixed bug in COUNT-IF, making it handle :FROM-END correctly
    (thanks to Matthew Danish)
  * incremented fasl file version number, because of the
    SXHASH-related changes in the layout of CLOS data structures

sbcl_0_7_9

changes in sbcl-0.7.9 relative to sbcl-0.7.8:
  * minor incompatible change: The runtime (the Unix executable named
    "sbcl") is now much pickier about the .core files it will load.
    Essentially it now requires .core files to descend from the same
    build (not just the same sources or LISP-IMPLEMENTATION-VERSION)
    as the runtime does. (The intent is to prevent the crashes which
    can occur, and which can even be reported as mysterious failures,
    when people patch the sources or change the build parameters
    without changing LISP-IMPLEMENTATION-VERSION, then mix and match
    sbcl and .core files.)
  * fixed bug: VALUES-LIST is no longer optimized away.
  * fixed bug 142: The FFI conversion of C string values to Lisp
    string values no longer conses excessively. (thanks to Nathan
    Froyd porting Raymond Toy's fix to CMU CL)
  * began to systematize and improve MOP conformance in PCL (thanks to
    Nathan Froyd, Gerd Moellman and Pierre Mai):
    ** SLOT-DEFINITION-ALLOCATION now returns :CLASS, not the class
       itself;
    ** GENERIC-FUNCTION-ARGUMENT-PRECEDENCE-ORDER is now implemented;
    ** FINALIZE-INHERITANCE is now called on class finalization;
    ** DOCUMENTATION and (SETF DOCUMENTATION) now have the correct
       argument precedence order.
  * fixed bug 202: The compiler no longer fails on functions whose
    derived types contradict their declared type.
  * DEFMACRO is implemented via EVAL-WHEN instead of IR1 translation,
    so it can be non-toplevel.
  * The fasl file version number has changed (because of the new
    implementation of DEFMACRO).
  * (mostly) fixed bugs 46b and 46c: sequence functions now check, in
    safe code, that any length requirement by their type-specifier
    argument is valid.  The exceptions to this are described in bug
    213.
  * fixed bugs 46h and 46i: TWO-WAY- and CONCATENATED-STREAM creation
    functions now check the types of their inputs as required by ANSI.
  * fixed bug 48c: SYMBOL-MACROLET signals PROGRAM-ERROR when an
    introduced symbol is DECLAREd to be SPECIAL.
  * fixed reading of (COMPLEX DOUBLE-FLOAT) literals from fasl files
  * fixed bug: :COUNT argument to sequence functions may be negative
  * fixed bug: body of DO-SYMBOLS may contain declarations
  * fixed bug: PUSHNEW now evaluates its arguments from left to right
    (reported by Paul F. Dietz, fixed by Gerd Moellman)
  * fixed bug: PUSH, PUSHNEW and POP now evaluate a place given by a
    symbol macro only once
  * fixed printing of call frame when argument list is unavailable
  * fixed bug: :ALLOW-OTHER-KEYS is an allowed keyword name
  * compiler no longer signals WARNING on unknown keyword
    :ALLOW-OTHER-KEYS

sbcl_0_7_8

changes in sbcl-0.7.8 relative to sbcl-0.7.7:
  * A beta-quality port to the mips architecture running Linux,
    based on the old CMUCL backend, has been made.  It has been tested
    on a big-endian kernel, and works sufficiently well to be able to
    rebuild itself; it has not been tested in little-endian mode.
  * fixed an inconsistency between gencgc.c and purify.c which made
    dumping/loading .core files unreliable
  * fixed bug 120a: The compiler now deals correctly with IFs where
    the consequent is the same as the alternative, instead of
    misderiving the return type. (thanks to Alexey Dejneka)
  * fixed bug 113: Logical pathnames are now dumpable (the logical
    host is resolved at load-time, throwing an error if it is not
    found).
  * fixed bug 174: FORMAT's error message is slightly clearer when a
    non-printing character is used in a format directive.
  * fixed several bugs in compiler checking of type declarations, i.e.
    violations of the Python "declarations are assertions" principle
    (thanks to Alexey Dejneka)
  * fixed several bugs in PCL's error checking (thanks to Gerd
    Moellmann)
  * fixed bug: printing of FILE-ERROR (thanks to Antonio
    Martinez-Shotton)
  * fixed bug in compilation of functions as first class values
    (thanks to Antonio Martinez-Shotton)
  * The compiler's handling TYPE-ERRORs which it can prove will
    inevitably happen at runtime has been cleaned up and corrected
    in several ways. (thanks to Alexey Dejneka)
  * improved argument type checking for various basic arithmetic
    operations (MAX, +, LOGXOR, etc.) which have had so much TLC
    lavished on them in the past that they can be compiled in many
    ways in different special cases
  * fixed bug 181: compiler checks validity of user supplied type
    specifiers
  * cleaned up code flushing in optimization: Function calls which
    should signal errors for safety purposes (e.g. which ANSI says
    should signal errors when their arguments are of incorrect type)
    are no longer optimized away.
  * added new extension: SB-DEBUG:BACKTRACE-AS-LIST
  * incremented fasl file version number, because changes in the
    implementation of sequence functions like COERCE caused
    internal utility functions like COERCE-TO-SIMPLE-VECTOR (used
    in old inline expansions) to become undefined. (Actually these
    changes were later undone, so we might very well be binary
    compatible with 0.7.7 after all, but leaving the version number
    incremented seemed like the simplest and most conservative
    thing to do.)

sbcl_0_7_7

changes in sbcl-0.7.7 relative to sbcl-0.7.6:
  * An alpha-quality port to the parisc architecture running Linux,
    based on the old CMUCL backend, has been made.  This, even more so
    than the other backends, should be considered still a work in
    progress; known problems include that the Linux kernel in 64-bit
    mode does not propagate the correct sigcontext structure to
    userspace, and consequently SBCL on a parisc64 kernel will not
    work yet.
  * fixed bug 189: The compiler now respects NOTINLINE declarations for
    functions declared in FLET and LABELS. (I.e. "LET conversion" is
    suppressed.) Also now that the compiler is looking at declarations
    in the environment, it checks optimization declarations as well,
    and suppresses inlining when (> DEBUG SPEED).
  * More fixes have been made to treatment of floating point exception
    treatment and other Unix signals.  In particular, floating point
    exceptions no longer cause Bus errors on the SPARC/Linux platform.
  * The detection and handling of control stack exhaustion (infinite
    or very deeply nested recursion) has changed.  Stack exhaustion
    detection is now done by write-protecting pages at the OS level
    and applies at all optimization settings; when found, a
    SB-KERNEL:CONTROL-STACK-EXHAUSTED condition (subclass of
    STORAGE-CONDITION) is signalled, so stack exhaustion can no longer
    be caught using IGNORE-ERRORS.
  * Bugs 65, 70, and 109 fixed: The compiler now preserves invariants
    correctly when transforming recursive LABELS functions to LETs.
    (thanks to Alexey Dejneka)
  * Bug 48a./b. fixed: SYMBOL-MACROLET now refuses to bind symbols
    that are names of constants or global variables.
  * Bug fix: DEFINE-ALIEN-ROUTINE now declaims the correct FTYPE for
    alien routines with docstrings.
  * Bug 184 fixed: Division of ratios by the integer 0 now signals an
    error of type DIVISION-BY-ZERO. (thanks to Wolfhard Buss and
    Raymond Toy)
  * Bug fix: Errors in PARSE-INTEGER are now of type PARSE-ERROR.
    (thanks to Eric Marsden)
  * Bug fix: COERCE to (COMPLEX FLOAT) of rationals now returns an
    object of type (COMPLEX FLOAT). (thanks to Wolfhard Buss)
  * Bug fix: The SPARC backend can now compile functions involving
    LOGAND and stack-allocated arguments. (thanks to Raymond Toy)
  * Bug fix: We no longer segfault on passing a non-FILE-STREAM stream
    to a functions expecting a PATHNAME-DESIGNATOR.
  * Bug fix: DEFGENERIC now enforces the ANSI restrictions on its
    lambda lists. (thanks to Alexey Dejneka)
  * Bug fix: changed encoding of PCL's internal MAKE-INSTANCE
    functions so that EXPORTing the name of the class doesn't cause
    MAKE-INSTANCE functions from earlier DEFCLASSes to get lost (thanks
    to Antonio Martinez for reporting this)
  * Bug 192 fixed: The internal primitive DATA-VECTOR-REF can now be
    constant-folded without failing an assertion. (thanks to Einar
    Floystad Dorum for reporting this)
  * Bugs 123 and 165 fixed: array specializations on as-yet-undefined
    types are now dealt with more correctly by the compiler.
  * Minor incompatible change: COMPILE-FILE-PATHNAME now merges its
    OUTPUT-FILE argument with its INPUT-FILE argument, resulting in
    behaviour analogous to RENAME-FILE.  This puts its behaviour more
    in line with ANSI's wording on COMPILE-FILE-PATHNAME. (thanks to
    Marco Antinotti)
  * The fasl file version number has changed again. (because of the
    bug fix involving the names of PCL MAKE-INSTANCE functions)

gc.cleanup.branch.test1

gc_cleanup_branch_test1

sbcl_0_7_6

changes in sbcl-0.7.6 relative to sbcl-0.7.5:
  * bug fix: Floating point exceptions are treated much more
    consistently on the x86/Linux and PPC/Linux platforms.
  * Array initialization with :INITIAL-ELEMENT is now much faster for
    cases when the compiler cannot open code the array creation, but
    does know what the UPGRADED-ARRAY-ELEMENT-TYPE will be. General
    array accesses have also seen a speed increase.
  * bug fix: LOAD :IF-DOES-NOT-EXIST NIL now works when file type is
    specified. (This was at the root of some bad interactions between
    SBCL and ILISP: thanks to Gregory Wright for diagnosing this and
    reporting the bug.)
  * bug fix: Internal error arguments for undefined functions are now
    computed correctly on the PPC/Linux platform.
  * bug fix: Bad &REST syntax is now checked correctly. (thanks to
    Raymond Toy's patch for CMU CL)
  * Support for the Solaris 9 operating environment has been included
    (thanks to Daniel Merritt)
  * A very ugly but hopefully complete draft of the missing FFI chapter
    of the manual has been created by reformatting the corresponding
    CMU CL manual chapter into (currently very ugly and incoherent)
    DocBook and bringing it up to date for SBCL behavior. Thus, the
    manual is now essentially complete, at least by my extreme
    once-and-only-once standards, whereby it's acceptable to refer to
    the doc strings of SB-EXT functions as the primary documentation.
  * The fasl file version number has changed again, due to cleanup of
    (user-invisible) bitrotted stuff. (E.g. *!INITIAL-FDEFN-OBJECTS*
    is no longer a static symbol.)

sbcl_0_7_5

changes in sbcl-0.7.5 relative to sbcl-0.7.4:
  * SBCL now builds with OpenMCL (version 0.12) as the
    cross-compilation host; also, more progress has been made toward
    bootstrapping under CLISP.
  * SBCL now runs on the Tru64 (aka OSF/1) operating system on the
    Alpha architecture.
  * bug 158 fixed: The compiler can now deal with integer loop
    increments different from 1; fixing this turned out also to fix
    bug 164.
  * bug 169 fixed: no more bogus warnings about using lexical bindings
    despite the presence of perfectly good SPECIAL declarations (thanks
    to David Lichteblau)
  * bug 175 fixed: CHANGE-CLASS is now more ANSI-conforming,
    accepting initargs. (thanks to Espen Johnsen and Pierre Mai)
  * bug 179 fixed: DIRECTORY can now deal with filenames with pattern
    characters in them.
  * bug 180 fixed: Method combination specifications no longer ignore
    the :MOST-SPECIFIC-LAST option. (thanks to Pierre Mai)
  * bug fix: Structure type predicate functions now check their argument
    count as they should.
  * bug fix: Classes with :METACLASS STRUCTURE-CLASS now print
    correctly. (thanks to Pierre Mai)
  * minor incompatible change: The --noprogrammer option is deprecated
    in favor of the new --disable-debugger option, which is very similar.
    (The major difference is that it takes effect at a slightly different
    time at startup, causing handling of errors in --sysinit and
    --userinit files will be affected differently.) The
    SB-EXT:DISABLE-DEBUGGER and SB-EXT:ENABLE-DEBUGGER functions have
    been added to allow this functionality to be controlled from ordinary
    Lisp code. (ENABLE-DEBUGGER should help people like the Debian
    maintainers, who might want to run non-interactive scripts to
    build SBCL cores which will later be used interactively.)
  * minor incompatible change: The LOAD function no longer, when given
    a wild pathname to load, loads all files matching that pathname.
    Instead, an error of type FILE-ERROR is signalled.

sbcl_0_7_2

changes in sbcl-0.7.2 relative to sbcl-0.7.1:
  * incompatible change: The compiler is now less aggressive about
    tail call optimization, doing it only when (> SPACE DEBUG) or
    (> SPEED DEBUG). (This is an incompatible change because there are
    programs which relied on the old CMU-CL-style behavior to optimize
    away their unbounded recursion which will now die of stack overflow.)
  * minor incompatible change: The default BYTES-CONSED-BETWEEN-GCS
    for non-GENCGC systems has been increased to 20M (since that
    seems much closer to the likely performance optimum for modern
    systems than the old 4M value was)
  * minor incompatible change: new larger values for *DEBUG-PRINT-LENGTH*
    and *DEBUG-PRINT-LEVEL*
  * SBCL runs on SPARC systems now. (thanks to Christophe Rhodes' port
    of CMU CL's support for SPARC, and various endianness and other
    SBCL portability fixes due to Christophe Rhodes and Dan Barlow)
  * new syntactic sugar for the Unix command line: --load foo.bar is now
    an alternate notation for --eval '(load "foo.bar")'.
  * bug fixes:
    ** The system now detects stack overflow and handles it gracefully,
       at least for (OR (> SAFETY (MAX SPEED SPACE)) (= SAFETY 3))
       optimization settings. (This is a good thing in general, and
       its introduction in this version should be particularly timely
       for anyone whose code fails because of suppression of tail
       recursion!)
    ** The system now hunts for the C variable "environ" in a more
       devious way, to avoid segfaults when the C library version differs
       between compile time and run time. (thanks to Christophe Rhodes)
    ** INTEGER-valued CATCH tags now work. (thanks to Alexey Dejneka,
       and also to Christophe Rhodes for porting the fix to non-X86 CPUs)
    ** The compiler no longer issues bogus style warnings for undefined
       classes in the same source file as the DEFCLASSes which defined
       them. (thanks to Stig E Sandoe for reporting and Martin Atzmueller
       for fixing this)
    ** fixes in CONDITION class precedence list for undefined function
       errors (thanks to Alexei Dejneka)
    ** *DEFAULT-PATHNAME-DEFAULTS* is used more consistently and
       correctly. (thanks to Dan Barlow)
    ** portability fixes aiming at bootstrapping under CLISP (thanks
       to Dave McDonald and Christophe Rhodes)
    ** FORMAT fixes (thanks to Robert Strandh and Dan Barlow)
    ** fixes in type translation and and type inference (thanks to
       Christophe Rhodes)
    ** fixes to optimizer internal errors (thanks to Alexei Dejneka)
    ** various fixes in the new ports (thanks to Dan Barlow)
  * several changes related to debugging:
    ** suppression of tail recursion, as noted above
    ** stack overflow detection, as noted above
    ** The default implementation of TRACE has changed. :ENCAPSULATE T
       is now the default. (For some time encapsulation has been more
       reliable than the breakpoint-based :ENCAPSULATE NIL
       implementation, at least on X86 systems; and I just noticed that
       encapsulation also seems closer to the spirit of the ANSI
       specification.)

sbcl_0_7_1

changes in sbcl-0.7.1 relative to sbcl-0.7.0:
* mostly bug fixes:
  ** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are set
     up properly again. (There was a packaging bug in 0.7.0 which
     left their definitions in SB-SYS::LOAD-FOREIGN and
     SB-SYS::LOAD-1-FOREIGN. LOAD-FOREIGN and LOAD-1-FOREIGN are
     vital for most things which interface to C-level interfaces,
     like extensions working with sockets or databases or
     Perl-compatible regexes or whatever, and the need to fix
     this bug is the main reason that 0.7.1 was released so
     soon after 0.7.0.)
  ** DEFGENERIC is now choosier about the methods it redefines, so that
     reLOADing a previously-LOADed file containing DEFGENERICs does
     the right thing now. Thus, the Lispy edit/reLOAD-a-little/test
     cycle now works as it should. (thanks to Alexey Dejneka)
  ** Bug 106 (types (COMPLEX FOO) where FOO is an obscure type) was
     fixed by Christophe Rhodes. (He actually submitted this patch
     months ago, and I delayed until after 0.7.0.)
  ** Bug 111 (internal compiler confusion about runtime checks on
     FUNCTION types) was fixed by Alexey Dejneka.
* Some internal cleanups (getting rid of variables which aren't
  needed now that the byte interpreter is gone) caused the fasl
  file format number to change again.

sbcl_0_7_0

changes in sbcl-0.7.0 relative to sbcl-0.6.13:
* major incompatible change: The default fasl file extension, i.e. the
  default extension for files produced by COMPILE-FILE, has changed
  to ".fasl", for all architectures. (No longer ".x86f" and ".axpf".)
* compiler changes:
  ** There are many changes in the implementation of the compiler.
     SBCL is now essentially a compiler-only implementation of ANSI
     Common Lisp. EVAL still "interprets" a few special cases, but
     almost all the interesting cases are handled by creating
     a LAMBDA expression, calling COMPILE on it, then calling
     FUNCALL on the result.
  ** The EVAL-WHEN code has been rewritten to be ANSI-compliant, and
     various related bugs (IR1-1, IR1-2, IR1-3, IR1-3a) have gone away.
     Since the code is newer, there might still be some new bugs
     (though not as many as before Martin Atzmueller's fixes:-). But
     the new code is substantially simpler and clearer, and hopefully
     any remaining bugs will be simpler, less fundamental, and more
     fixable then the bugs in the old code.
  ** The revised compiler is still a little unsteady on its feet.
     In particular,
     *** The debugging information it produces (particularly the names
         of FUNCTION objects) is sometimes much less useful than what
         the old compiler produced.
     *** The support for inlining FOO when you (DECLAIM (INLINE FOO))
         then do (DEFUN FOO ..) in a non-null lexical environment (e.g.
         within a MACROLET) has been temporarily weakened.
  ** There are new compiler optimizations for various functions:
     *** the sequence functions FIND, POSITION, FIND-IF, POSITION-IF,
         FIND-IF-NOT, POSITION-IF-NOT, and FILL
     *** the math functions TRUNCATE, FLOOR, and CEILING
     *** the function-of-all-trades COERCE
     Mostly these should be transparent, but there's one
     potentially-annoying problem (bug 117): when the compiler
     inline-expands a function and does type analysis on the result,
     it can create control paths which have type mismatches, and
     when it can't prove that those control paths aren't taken,
     it will issue WARNINGs about the type mismatches. This is
     a particular problem in practice for the new sequence functions.
     It's not clear how this should be fixed, and for now, a
     workaround is given in the entry for 117 in the BUGS file.
  ** (Because of the interaction between the two previous items --
     occasional inlining problems and new inline expansions -- some
     of the new sequence function optimizations won't really kick in
     completely until debugging information, and then inlining, are
     straightened out in some future version.)
* minor incompatible changes:
  ** As part of a bug fix by Christophe Rhodes to DIRECTORY behavior,
     DIRECTORY no longer implicitly promotes NIL slots of its
     pathname argument to :WILD. In particular, when you ask for the
     contents of a directory (which you used to be able to do without
     explicit wildcards, e.g. (DIRECTORY "/tmp/")) you now need to use
     explicit wildcards, e.g. (DIRECTORY "/tmp/*.*").
  ** changes in behavior that ANSI explicitly defines to be
     implementation dependent:
     *** The new compiler-only implementation still conforms with ANSI,
         but acts a little different than before. Besides the obvious
	 changes in performance tradeoffs (that the cost per form passed
	 to EVAL has gone up, and the cost per form executed by EVAL
	 has gone down), the behavior of the system changes a little
	 because there are no longer any interpreted function objects.
         COMPILED-FUNCTION-P is now synonymous with FUNCTIONP, and
         e.g. doing COMPILE on the output of interactive DEFUN is
         now a no-op.
     *** The value of INTERNAL-TIME-UNITS-PER-SECOND has been increased
         from 100 to 1000.
     *** The default for the USE list in MAKE-PACKAGE and DEFPACKAGE
         has changed from (:CL) to NIL.
     *** The CHAR-NAME of unprintable ASCII characters which, unlike
         e.g. #\Newline and #\Tab, don't have names specified in the
         ANSI Common Lisp standard, is now based on their ASCII symbolic
         names (#\Nul, #\Soh, #\Stx, etc.) The old CMU-CL-style names
         (#\Null, #\^a, #\^b, etc.) are still accepted by NAME-CHAR, but
         are no longer used for output.
  ** changes in internal implementation constants:
     *** The default value of *BYTES-CONSED-BETWEEN-GCS* has doubled, to
         4 million. (If your application spends a lot of time GCing and
         you have a lot of RAM, you might want to experiment with
         increasing it even more.)
  ** The SB-C-CALL package has been merged into the SB-ALIEN package.
     However, almost all old code should still continue to work without
     immediate update, as SB-C-CALL is now a (deprecated) nickname
     for SB-ALIEN.
  ** Old operator names in the style DEF-FOO are now deprecated in
     favor of new corresponding names DEFINE-FOO, for consistency with
     the naming convention used in the ANSI standard (DEFSTRUCT, DEFVAR,
     DEFINE-CONDITION, DEFINE-MODIFY-MACRO..). This mostly affects
     internal symbols, but a few supported extensions like
     SB-ALIEN:DEF-ALIEN-FUNCTION are also affected. (So e.g.
     DEF-ALIEN-FUNCTION becomes DEFINE-ALIEN-FUNCTION.)
  ** The debugger prompt sequence now goes "5]", "5[2]", "5[3]",
     etc. as you get deeper into recursive calls to the debugger
     command loop, instead of the old "5]", "5]]", "5]]]"
     sequence. (I was motivated to do this when squabbles between
     ILISP and SBCL left me very deeply nested in the debugger. In the
     short term, this change will probably provoke more ILISP/SBCL
     squabbles, but hopefully it will be an improvement in the long run.)
  ** SB-ALIEN:DEFINE-ALIEN-FUNCTION (also known by the old deprecated
     name DEF-ALIEN-FUNCTION) now does DECLAIM FTYPE for the defined
     function, since declaiming return types involving aliens is
     (1) annoyingly messy to do by hand and (2) vital to efficient
     compilation of code which calls such functions.
  ** SB-ALIEN:LOAD-FOREIGN and SB-ALIEN:LOAD-1-FOREIGN are no
     longer reexported by the SB-EXT package. They're solely useful
     for alien code, so it seems more logical that you should get
     them from the SB-ALIEN package, not in SB-EXT.
  ** :SB-CONSTRAIN-FLOAT-TYPE, :SB-PROPAGATE-FLOAT-TYPE, and
     :SB-PROPAGATE-FUN-TYPE are no longer considered to be optional
     features. Instead, the code that they used to control is always
     built into the system.
* many other bug fixes
  ** DEFSTRUCT and DEFCLASS have been substantially updated to take
     advantage of the new EVAL-WHEN stuff and to clean them up in
     general, and they are now more ANSI-compliant in a number of
     ways. Martin Atzmueller is responsible for a lot of this.
  ** Besides the cleanups discussed above, Martin Atzmueller fixed
     several other bugs:
     *** fixes in READ-SEQUENCE and WRITE-SEQUENCE
     *** correct ERROR type for various file operations
     *** some fixes for Lisp streams
     *** DEFMETHOD syntax checking
     *** changing old weird representation of debug information as
         strings (which, among their other deficiencies, don't transform
         correctly when you rename packages, and don't change their
         print representation when you change things like *PACKAGE*
	 and *PRINT-LENGTH*) to symbols and lists of symbols
     He also made several improvements and fixed several bugs in DESCRIBE.
  ** Alexey Dejneka fixed many bugs, including classic bugs and bugs he
     discovered himself:
     *** misbehavior of WRITE-STRING/WRITE-LINE
     *** LOOP over keys of a hash table, LOOP bugs 49b and 81 and 103,
         and several other LOOP problems as well
     *** DIRECTORY when similar filenames are present
     *** DEFGENERIC with :METHOD options
     *** bug 126, in (MAKE-STRING N :INITIAL-ELEMENT #\SPACE))
     *** bug in the optimization of ARRAY-ELEMENT-TYPE
     *** argument ordering in FIND with :TEST option
     *** mishandled package designator argument in APROPOS-LIST
     *** various problems in the backquote readmacro
     *** a bug in APROPOS
     *** probably some others that I'm not describing very well here,
         since the CVS log documents them by reference to sbcl-devel
         messages, and the SourceForge archives aren't working well.:-(
  ** Dan Barlow improved the Alpha port (and is making progress on the
     PPC port, for those of you who think different).
  ** Besides the DIRECTORY fixes and changes mentioned elsewhere,
     Christophe Rhodes cleaned up the system self-test scripts (in tests/*),
     contributed the optimization of FIND-IF-NOT and POSITION-IF-NOT, and
     continues to work on the SPARC port (for those of you in a position
     to look down upon our little PC-compatible boxes from a great height).
  ** PPRINT-LOGICAL-BLOCK now copies the *PRINT-LINES* value on entry
     and uses that copy, rather than the current dynamic value, when
     it's trying to decide whether to truncate output. Thus e.g.
       (let ((*print-lines* 50))
         (pprint-logical-block (stream nil)
           (dotimes (i 10)
             (let ((*print-lines* 8))
               (print (aref possiblybigthings i) stream)))))
     should now truncate the logical block only at 50 lines, instead of
     often truncating it at 8 lines, as it did before.
* The doc/cmucl/ directory, containing old CMU CL documentation
  from the time of the fork, is no longer part of the base system.
  SourceForge has shut down its anonymous FTP service, and with it
  my original plan for distributing the old CMU CL documentation
  there. For now, if you need these files you can download an old
  SBCL source release and extract them from it.
* The fasl file version number changed again, for dozens of reasons,
  some of which are apparent above.

sbcl_0_6_13

changes in sbcl-0.6.13 relative to sbcl-0.6.12:
* a port to the Compaq/DEC Alpha CPU, thanks to Dan Barlow
* Martin Atzmueller ported Tim Moore's marvellous CMU CL DISASSEMBLE
  patch, so that DISASSEMBLE output is much nicer.
* The code in the SB-PROFILE package now seems reasonably stable.
  I still haven't decided what the final interface should look like
  (I'd like PROFILE to interact cleanly with TRACE, since both
  facilities use function encapsulation) but if you have a need
  for profiling now, you can probably use it successfully with
  the current CMU-CL-style interface.
* Pathnames and *DEFAULT-DIRECTORY-DEFAULTS* are much more
  ANSI-compliant, thanks to various fixes and tests from Dan Barlow.
  Also, at Dan Barlow's suggestion, TRUENAME on a dangling symbolic
  link now returns the dangling link itself, and for similar
  reasons, TRUENAME on a cyclic symbolic link returns the cyclic
  link itself. (In these cases the old code signalled an error and
  looped endlessly, respectively.) Thus, DIRECTORY now works even
  in the presence of dangling and cyclic symbolic links.
* Compiler trace output (the :TRACE-FILE option to COMPILE-FILE)
  is now a supported extension again, since the consensus on
  sbcl-devel was that it can be useful for ordinary development
  work, not just for debugging SBCL itself.
* The default for SB-EXT:*DERIVE-FUNCTION-TYPES* has changed to
  NIL, i.e. ANSI behavior, i.e. the compiler now recognizes
  that currently-defined functions might be redefined later with
  different return types.
* Hash tables can be printed readably, as inspired by CMU CL code
  of Eric Marsden and SBCL code of Martin Atzmueller.
* better error handling in CLOS method combination, thanks to
  Martin Atzmueller porting Pierre Mai's CMU CL patches
* more overflow fixes for >16Mbyte I/O buffers
* A bug in READ has been fixed, so that now a single Ctrl-D
  character suffices to cause end-of-file on character streams.
  In particular, now you only need one Ctrl-D at the command
  line (not two) to exit SBCL.
* fixed bug 26: ARRAY-DISPLACEMENT now returns (VALUES NIL 0) for
  undisplaced arrays.
* fixed bug 107 (reported as a CMU CL bug by Erik Naggum on
  comp.lang.lisp 2001-06-11): (WRITE #*101 :RADIX T :BASE 36) now
  does the right thing.
* The implementation of some type tests, especially for CONDITION
  types, is now tidier and maybe faster, due to CMU CL code
  originally by Douglas Crosher, ported by Martin Atzmueller.
* Some math functions have been fixed, and there are new
  optimizers for deriving the types of COERCE and ARRAY-ELEMENT-TYPE,
  thanks to Raymond Toy's work on CMU CL, ported by Martin Atzmueller.
* (There are also some new optimizers in contrib/*-extras.lisp. Those
  aren't built into sbcl-0.6.13, but are a sneak preview of what's
  likely to be built into sbcl-0.7.0.)
* A bug in COPY-READTABLE was fixed. (Joao Cachopo's patch to CMU
  CL, ported to SBCL by Martin Atzmueller)
* DESCRIBE now gives more information in some cases. (Pierre Mai's
  patch to CMU CL, ported to SBCL by Martin Atzmueller)
* Martin Atzmueller and Bill Newman fixed some bugs in INSPECT.
* There's a new slam.sh hack to shorten the edit/compile/debug
  cycle for low-level changes to SBCL itself, and a new
  :SB-AFTER-XC-CORE target feature to control the generation of
  the after-xc.core file needed by slam.sh.
* minor incompatible change: The ENTRY-POINTS &KEY argument to
  COMPILE-FILE is no longer supported, so that now every function
  gets an entry point, so that block compilation looks a little
  more like the plain vanilla ANSI section 3.2.2.3 scheme.
* minor incompatible change: SB-EXT:GET-BYTES-CONSED now
  returns the number of bytes consed since the system started,
  rather than the number consed since the first time the function
  was called. (The new definition parallels ANSI functions like
  CL:GET-INTERNAL-RUN-TIME.)
* minor incompatible change: The old CMU-CL-style DIRECTORY options,
  i.e. :ALL, :FOLLOW-LINKS, and :CHECK-FOR-SUBDIRS, are no longer
  supported. Now DIRECTORY always does the abstract Common-Lisp-y
  thing, i.e. :ALL T :FOLLOW-LINKS T :CHECK-FOR-SUBDIRS T.
* Fasl file version numbers are now independent of the target CPU,
  since historically most system changes which required version
  number changes have affected all CPUs equally. Similarly,
  the byte fasl file version is now equal to the ordinary
  fasl file version.

sbcl_0_6_12

changes in sbcl-0.6.12 relative to sbcl-0.6.11:
* incompatible change: The old SB-EXT:OPTIMIZE-INTERFACE declaration
  is no longer recognized. I apologize for this, because it was
  listed in SB-EXT as a supported extension, but I found that
  its existing behavior was poorly specified, as well as incorrectly
  specified, and it looked like too much of a mess to straighten it
  out. I have enough on my hands trying to get ANSI stuff to work..
* many patches ported from CMU CL by Martin Atzmueller, with
  half a dozen bug fixes in pretty-printing and the debugger, and
  half a dozen others elsewhere
* fixed bug 13: Floating point infinities are now supported again.
  They might still be a little bit flaky, but thanks to bug reports
  from Nathan Froyd and CMU CL patches from Raymond Toy they're not
  as flaky as they were.
* The --noprogrammer command line option is now supported. (Its
  behavior is slightly different in detail from what the old man
  page claimed it would do, but it's still appropriate under the
  same circumstances that the man page talks about.)
* The :SB-PROPAGATE-FLOAT-TYPE and :SB-PROPAGATE-FUN-TYPE features
  are now supported, and enabled by default. Thus, the compiler can
  handle many floating point and complex operations much less
  inefficiently. (Thus e.g. you can implement a complex FFT
  without consing!)
* The compiler now detects type mismatches between DECLAIM FTYPE
  and DEFUN better, and implements CHECK-TYPE more correctly, and
  SBCL builds under CMU CL again despite its non-ANSI EVAL-WHEN,
  thanks to patches from Martin Atzmueller.
* various fixes to make the cross-compiler more portable to
  ANSI-conforming-but-different cross-compilation hosts (notably
  Lispworks for Windows, following bug reports from Arthur Lemmens)
* A bug in READ-SEQUENCE for CONCATENATED-STREAM, and a gross
  ANSI noncompliance in DEFMACRO &KEY argument parsing, have been
  fixed thanks to Pierre Mai's CMU CL patches.
* fixes to keep the system from overflowing internal counters when
  it tries to use i/o buffers larger than 16M bytes
* fixed bug 45a: Various internal functions required to support
  complex special functions have been merged from CMU CL sources.
  (When I was first setting up SBCL, I misunderstood a compile-time
  conditional #-OLD-SPECFUN, and so accidentally deleted them.)
* improved support for type intersection and union, fixing bug 12
  (e.g., now (SUBTYPEP 'KEYWORD 'SYMBOL)=>T,T) and some other
  more obscure bugs as well
* some steps toward byte-compiling non-performance-critical
  parts of the system, courtesy of patches from Martin Atzmueller
* Christophe Rhodes has made some debian packages of sbcl at
  <http://www-jcsu.jesus.cam.ac.uk/ftp/pub/debian/lisp>.
  From his sbcl-devel e-mail of 2001-04-08 they're not completely
  stable, but are nonetheless usable. When he's ready, I'd be happy
  to add them to the SourceForge "File Releases" section. (And if
  anyone wants to do RPMs or *BSD packages, they'd be welcome too.)
* new fasl file format version number (because of changes in
  internal representation of (OR ..) types to accommodate the new
  support for (AND ..) types, among other things)

sbcl_0_6_11

changes in sbcl-0.6.11 relative to sbcl-0.6.10:
* Martin Atzmueller pointed out that bugs #9 and #25 are gone in
  current SBCL.
* bug 34 fixed by Martin Atzmueller: dumping/loading instances works
  better
* fixed bug 40: TYPEP, SUBTYPEP, UPGRADED-ARRAY-ELEMENT-TYPE,
  and UPGRADED-COMPLEX-PART-TYPE now work better with of compound
  types built from undefined types, e.g. '(VECTOR SOME-UNDEF-TYPE).
* DESCRIBE now works on structure objects again.
* Most function call argument type mismatches are now handled as
  STYLE-WARNINGs instead of full WARNINGs, since the compiler doesn't
  know whether the function will be redefined before the call is
  executed. (The compiler could flag local calls with full WARNINGs,
  as per the ANSI spec "3.2.2.3 Semantic Constraints", but right now
  it doesn't keep track of enough information to know whether calls
  are local in this sense.)
* Compiler output is now more verbose, with messages truncated
  later than before. (There should be some supported way for users
  to override the default verbosity, but I haven't decided how to
  provide it yet, so this behavior is still controlled by the internal
  SB-C::*COMPILER-ERROR-PRINT-FOO* variables in
  src/compiler/ir1util.lisp.)
* Fasl file format version numbers have increased again, because
  support for the Gray streams extension changes the layout of the
  system's STREAM objects.
* The Gray subclassable streams extension now works, thanks to a
  patch from Martin Atzmueller.
* The full LOAD-FOREIGN extension (not just the primitive
  LOAD-FOREIGN-1) now works, thanks to a patch from Martin Atzmueller.
* The default behavior of RUN-PROGRAM has changed. Now, unlike CMU CL
  but like most other programs, it defaults to copying the Unix
  environment from the original process instead of starting the
  new process in an empty environment.
* Extensions which manipulate the Unix environment now support
  an :ENVIRONMENT keyword option which doesn't smash case or
  do other bad things. The CMU-CL-style :ENV option is retained
  for porting convenience.
* LOAD-FOREIGN (and LOAD-1-FOREIGN) now support logical pathnames,
  as per Daniel Barlow's suggestion and Martin Atzmueller's patch