All News

New SBCL versions are usually released at the end of each month: check the Sourceforge File List to see the current version. The new features of all SBCL releases are listed below.

• 1.0.18
• 1.0.17
• 1.0.16
• 1.0.15
• 1.0.14
• 1.0.13
• 1.0.12
• 1.0.11
• 1.0.10
• 1.0.9
• 1.0.8
• 1.0.7
• 1.0.6
• 1.0.5
• 1.0.4
• 1.0.3
• 1.0.2
• 1.0.1
• 1.0
• 0.9.18
• 0.9.17
• 0.9.16
• 0.9.15
• 0.9.14
• 0.9.13
• 0.9.12
• 0.9.11
• 0.9.10
• 0.9.9
• 0.9.8
• 0.9.7
• 0.9.6
• 0.9.5
• 0.9.4
• 0.9.3
• 0.9.2
• 0.9.1
• 0.9.0
• 0.8.21
• 0.8.20
• 0.8.19
• 0.8.18
• 0.8.17
• 0.8.16
• 0.8.15
• 0.8.14
• 0.8.13
• 0.8.12
• 0.8.11
• 0.8.10
• 0.8.9
• 0.8.8
• 0.8.7
• 0.8.6
• 0.8.5
• 0.8.4
• 0.8.3
• 0.8.2
• 0.8.1
• 0.8.0
• 0.8alpha.0
• 0.7.14
• 0.7.13
• 0.7.12
• 0.7.11
• 0.7.10
• 0.7.9
• 0.7.8
• 0.7.7
• 0.7.6
• 0.7.5
• 0.7.4
• 0.7.3
• 0.7.2
• 0.7.1
• 0.7.0
• 0.6.13
• 0.6.12
• 0.6.11
• 0.6.10
• 0.6.9
• 0.6.8
• 0.6.7
• 0.6.6
• 0.6.5
• 0.6.4
• 0.6.3
• 0.6.2
• 0.6.1
• 0.6.0

New in version 1.0.18

• minor incompatible change: SB-SPROF:WITH-PROFILING now by default profiles only the current thread.
• minor incompatible change: changes to SYMBOL-VALUE of constants defined with DEFCONSTANT now signal an error.
• enhancement: SB-SPROF now has support for wallclock profiling, and is also able to profile specific threads. REPORT output has also additional sorting options.
• enhancement: better pretty-printing of DEFPACKAGE forms. (Thanks to Michael Weber)
• optimization: structure allocation has been improved
  • constructors created by non-toplevel DEFSTRUCTs are ~40% faster.
  • out of line constructors are ~10% faster.
  • inline constructors are ~15% faster.
  • inline constructors are capable of dynamic extent allocation (generally on x86 and x86-64, in some cases on other platforms as well.)
• optimization: simple uses of HANDLER-CASE and HANDLER-BIND no longer cons.
• optimization: file compiler is now able to coalesce non-circular lists, non-base strings, and bit-vectors. Additionally, constants are never referenced through SYMBOL-VALUE at runtime.
• optimization: code defining methods on PRINT-OBJECT (and other generic functions in the COMMON-LISP package) now loads faster.
• bug fix: EAI_NODATA is deprecated since RFC 3493. Stop using it in sb-bsd-sockets.
• bug fix: if COMPILE-FILE aborts due to an unwind, the partial fasl is now deleted. (reported by Attila Lendvai)
• bug fix: READ-LINE always returned NIL for the last line in files. (reported by Yoshinori Tahara)
• bug fix: more accurate disassembly annotations of foreign function calls. (thanks to Andy Hefner)
• bug fix: trimming non-simple strings and non-string string designators when the there is nothing to trim works properly. (thanks to James Knight)
• new feature: SB-POSIX bindings for mlockall, munlockall, and setsid. (thanks to Travis Cross)
• fixed some bugs revealed by Paul Dietz' test suite:
  • NIL is a valid function name (regression at 1.0.13.38)
  • FILL on lists was missing its return value (regression at 1.0.12.27)
  • STRING-TRIM, STRING-LEFT-TRIM, and STRING-RIGHT-TRIM did not respect fill pointers properly (regression at 1.0.12.23)
  • STRING-TRIM, STRING-LEFT-TRIM, and STRING-RIGHT-TRIM did not respect displacement indices properly (regression at 1.0.12.23)

New in version 1.0.17

• temporary regression: user code can no longer allocate closure variable storage on stack, due to bug 419 without explicitly requesting it. Please consult sbcl-devel for advice if you need to use this feature in the meanwhile.
• new feature: runtime argument --control-stack-size can be used to adjust thread default control stack size.
• enhancement: improved TIME output
  • all times are reported using the measured accuracy (milliseconds for real and GC times, microseconds for everything else.)
  • processor cycle counts on x86 and x86-64.
  • interpreted forms are counted for both evaluator modes.
  • number of lambdas converted by the compiler is reported.
  • CPU percentage report (computed from real and total run time.)
  • more comprehensive run time reporting, using a condenced format
  • interperted form, lambda, and page fault counts are omitted when zero.
• optimization: ADJOIN and PUSHNEW are upto ~70% faster in normal SPEED policies.
• optimization: APPEND is upto ~10% faster in normal SPEED policies.
• optimization: two argument forms of LAST are upto ~10% faster in normal SPEED policies.
• optimization: NCONC no longer needs to heap cons its &REST list in normal SPEED policies.
• bug fix: SB-FLUID build feature no longer breaks the build. (thanks to Sidney Markowitz)
• bug fix: UNION and NUNION work with :TEST-NOT once more, regression since 1.0.9.1. (thanks to Eric Marsden)
• bug fix: result of MAKE-ARRAY can be stack allocated - regression since 1.0.15.36. (thanks to Paul Khuong)
• bug fix: LAST when always returned the whole list when given a bignum as the second argument.
• bug fix: dynamic extent allocation of nested lists and vectors could leak to otherwise accessible parts.
• bug fix: invalid optimization of heap-allocated alien variable reference.
• bug fix: fasl header checking is less vulnerable to different platform word lengths.
• bug fix: more correct assembler syntax for GNU binutils 2.18.50.0.4 support. (thanks to Marijn Schouten)
• bug fix: fix ECASE warnings from CMUCL-as-xc-host. (reported by Andreas Franke)
• bug fix: the fopcompiler can handle LOCALLY forms (with no declarations) successfully. (reported by Attila Lendvai)

New in version 1.0.16

• minor incompatible change: revert the changes to sb-posix's error signaling added in 1.0.14.
• minor incompatible change: change PROBE-FILE back to returning NIL whenever we can't get a truename, as was the case before 1.0.14.
• minor incompatible change: SB-BSD-SOCKETS:NAME-SERVICE-ERROR now inherits from ERROR instead of just CONDITION.
• new feature: SB-INTROSPECT can provide source locations for instances as well. (thanks to Tobian Ritterweiler)
• optimization: binding special variables now generates smaller code on threaded platforms.
• optimization: MEMBER and ASSOC are over 50% faster for :TEST #'EQ and cases where no :TEST is given but the compiler can infer that the element to search is of type (OR FIXNUM (NOT NUMBER)).
• optimization: better LOGNOT on fixnums.
• optimization: modular arithmetic for a particular requested width is implemented using a tagged representation unless a better representation is available.
• fixed bug 423: TRULY-THE and *CHECK-CONSISTENCY* interaction.
• bug fix: SB-BSD-SOCKETS:MAKE-INET-ADDRESS checks the input string for wellformedness and returns a specialized vector. (reported by Francois-Rene Rideau)
• bug fix: FIND-CLASS was not thread-safe. (reported by Attila Lendvai)
• bug fix: ~R was broken for vigtillions. (thanks to Luis Oliveira)
• bug fix: attempt to obtain *SCHEDULER-LOCK* recursively when unscheduling timer at the same time as another timer fires.
• bug fix: don't reschedule timers for dead threads.
• bug fix: periodic polling was broken. (thanks to Espen S Johnsen)
• bug fix: copying output from RUN-PROGRAM to a stream signalled bogus errors if select() was interrupted.
• enhancement: add support for fcntl's struct flock to SB-POSIX.

New in version 1.0.15

• enhancement: cleaner backtraces for interactive interrupts, as well as other cases where the interesting frames used to be obscured by interrupt handling frames.
• enhancement: untracing a whole package using (UNTRACE "FOO") is now supported, and tracing a whole package using (TRACE "FOO") now traces SETF-functions as well.
• enhancement: implement SB-POSIX:MKTEMP and SB-POSIX:MKDTEMP.
• SB-DEBUG:PRINT-FRAME-CALL now prints the entry-point kind even when SB-DEBUG:*SHOW-ENTRY-POINT-DETAILS* is NIL.
• unreadably printed representation of hash-tables now includes weakness if any.
• bug fix: partially fixed #188: type propagation from assignments is now more efficient.
• bug fix: fixed #407: (COERCE X 'SINGLE-FLOAT) and (COERCE X 'DOUBLE-FLOAT) are not flushable.
• bug fix: on x86 and x86-64 pointer based EQ-hashing now uses the full address of the object, and none of the tag bits.
• bug fix: readably printing hash-tables now respects other printer control variables. (reported by Cedric St-Jean)
• bug fix: compiler gave a bogus STYLE-WARNING for the :SYNCHRONIZED keyword with MAKE-HASH-TABLE.
• bug fix: export SB-POSIX:MKSTEMP.
• bug fix: SORT was not interrupt safe.
• bug fix: XREF accounts for the last node of each basic-block as well.
• bug fix: MAKE-INSTANCE optimizations interacted badly with non-keyword :DEFAULT-INITARGS in the presence of :BEFORE/:AFTER methods on SHARED-INITIALIZE. (thanks to Matt Marjanovic)
• bug fix: the CTOR optimization for MAKE-INSTANCE should no longer create obsolete instances in the case of redefinition or obsoletion of a superclass. (thanks to Andy Hefner)
• bug fix: Support for the Alpha architecture has been revived; it had suffered somewhat from lack of maintenance since sbcl-1.0.
• improvements to the Windows port:
  • The system detects the codepage to use at startup, instead of using the value from the saved core. (thanks to Kei Suzuki)

New in version 1.0.14

• new feature: SB-EXT:*EXIT-HOOKS* are called when the process exits (see documentation for details.)
• revived support for OpenBSD (contributed by Josh Elsasser)
• partially fixed bug #108: ROOM no longer suffers from occasional (AVER (SAP= CURRENT END)) failures.
• fixed bug #402: proclaimed non-standard declarations in DEFMETHOD bodies no longer cause a WARNING to be signalled. (reported by Vincent Arkesteijn)
• bug fix: (TRUNCATE X 0) when X is a bignum now correctly signals DIVISION-BY-ZERO. Similarly for MOD and REM (which suffered due to the bug in TRUNCATE.) (reported by Michael Weber)
• bug fix: SB-SPROF:REPORT no longer signals an error if there are no samples. (reported by Andy Hefner)
• bug fix: functions compiled using (COMPILE NIL '(LAMBDA ...)) no longer appear as (NIL ...) frames in backtraces.
• bug fix: RESOLVE-CONFLICT (and the other name conflict machinery) is now actually exported from SB-EXT as documented. (reported by Maciej Katafiasz)
• bug fix: sb-aclrepl now correctly understands how to inspect single-floats on 64-bit platforms where single-floats are not boxed.
• bug fix: SB-MOP:CLASS-SLOTS now signals an error if the class has not yet been finalized. (reported by Levente Meszaros)
• bug fix: CLOSE :ABORT T behaves more correctly on Windows.
• DESCRIBE and (DOCUMENTATION ... 'OPTIMIZE) describe meaning of SBCL-specific optimize qualities.

New in version 1.0.13

• minor incompatible change: RUN-PROGRAM now uses execvp(3) to find an executable in the search path, and does so in the child process's PATH. The function FIND-EXECUTABLE-IN-SEARCH-PATH has been removed; it can be found in the CVS history, for somebody who needs that search behavior (see the manual).
• minor incompatible change: compiler policy re. weakening type checks has changed: now type checks are weakened only if SAFETY < 2 and SAFETY < SPEED.
• SB-EXT:NATIVE-NAMESTRING takes a new keyword AS-FILE, forcing unparsing of directory pathnames as files. Analogously, SB-EXT:PARSE-NATIVE-NAMESTRING takes an AS-DIRECTORY, forcing a filename to parse into a directory pathname.
• enhancement: implicit generic function creation now signals a specific style-warning IMPLICIT-GENERIC-FUNCTION-WARNING, which users can bind handlers for and muffle around calls to LOAD.
• enhancement: RUN-PROGRAM allows unicode arguments and environments to be used (using the default stream external format), and allows non-simple strings to be used. (thanks to Harald Hanche-Olsen)
• optimization: COPY-SEQ, FILL, and SUBSEQ are 30-80% faster for strings and vectors whose element-type or simplicity is not fully known at compile-time.
• optimization: STRING-TRIM and related functions no longer allocate a new string when no trimming needs to be performed. These functions are also faster than before when the input string has been declared as a simple-string.
• optimization: READ-SEQUENCE on simple-strings is up to 80% faster.
• optimization: READ-LINE is significantly faster for files containing long lines.
• optimization: non-open coded uses of character comparison operators (e.g. char=) no longer cons when called with more than one parameter on platforms supporting dynamic-extent allocation.
• bug fix: READ-SEQUENCE on composite stream wrapping a Gray stream with STREAM-ELEMENT-TYPE (UNSIGNED-BYTE 8) signalled an error.
• bug fix: COPY-SEQ on lists did not signal a type-error on improper lists in safe code.
• bug fix: some sequence functions elided bounds checking when SPEED > SAFETY.
• bug fix: too liberal weakening of union-type checks when SPEED > SAFETY.
• bug fix: more bogus fixnum declarations in ROOM implementation have been fixed.

New in version 1.0.12

• new feature: MAKE-HASH-TABLE now experimentally accepts a :SYNCHRONIZED argument, which makes the hash-table safe for concurrent accesses (but not iteration.) See also: SB-EXT:WITH-LOCKED-HASH-TABLE, and SB-EXT:HASH-TABLE-SYNCHRONIZED-P.
• optimization: CONCATENATE on strings is an order of magnitude faster in code compiled with (> SPEED SPACE).
• optimization: SUBSEQ is ~50% faster on lists.
• bug fix: bug 417 fixed -- source location reporting is now more robust.
• bug fix: SUBSEQ on a list will now correctly signal an error if if END is smaller then START.
• bug fix: SB-PROFILE will no longer report extra consing for nested calls to profiled functions.
• bug fix: ROOM implementation had bogus fixnum declarations which could cause type-errors when calling ROOM on large images.
• bug fix: if file compilation is aborted, the partial fasl is now deleted, and COMPILE-FILE returns NIL as the primary value.
• bug fix: number of thread safety issues relating to SBCL's internal hash-table usage have been fixed.
• bug fix: SB-SYS:WITH-PINNED-OBJECTS could cause garbage values to be returned from its body when the values were being returned using unknown-values return convection and the W-P-O was wrapped inside an UNWIND-PROTECT.
• bug fix: sb-posix should now compile again under Windows, enabling slime to work again.

New in version 1.0.11

• incompatible change: hash-table accessor functions are no longer automatically protected by locks. Concurrent accesses on the same hash-table from multiple threads can give inconsistent results or even corrupt the hash-table completely. Multi-threaded applications should do their own locking at the correct granularity. In the current implementation it is still safe to have multiple readers access the same table, but it's not guaranteed that this property will be maintained in future releases.
• minor incompatible change: (SETF MUTEX-VALUE) is not longer supported, and will signal an error at runtime.
• enhancement: SB-THREAD package now exports a semaphore interface.
• enhancement: CONS can now stack-allocate on x86 and x86-64. (Earlier LIST and LIST* supported stack-allocation, but CONS did not.)
• enhancement: nested lists can now be stack allocated on platforms providing stack allocation support.
• enhancement: dynamic-extent support has been extended to support cases where there are multiple possible sources for the stack allocated value.
• optimization: RELEASE-MUTEX no longer needs to perform a syscall if the mutex is uncontested on Linux.
• bug fix: symbol-macro expansion now uses the *MACROEXPAND-HOOK* as specified by the CLHS. (thanks to Tobias Rittweiler)
• bug fix: NaN comparison now works on x86-64.
• bug fix: CLOSE :ABORT T on a stream with pending output now works.
• bug fix: instances of non-standard metaclasses using standard instance structure protocol sometimes missed the slot type checks in safe code.
• bug fix: known functions can be inlined in high-debug code.

New in version 1.0.10

• minor incompatible change: the MSI installer on Windows no longer associates .lisp and .fasl files with the installed SBCL.
• minor incompatible change: :UNIX is no longer present in *FEATURES* on Windows. (thanks to Luis Oliviera)
• new feature: SB-CLTL2 contrib module now implements FUNCTION-INFORMATION. (thanks to Larry D'Anna)
• optimization: scavenging weak pointers is now more efficient, requiring O(1) instead of O(N) per weak pointer to identify scanvenged vs. unscavenged pointers. (thanks to Paul Khuong)
• optimization: typechecking (SETF SLOT-VALUE) is now ~5x faster in method bodies using constant slot-names when the first argument is a specializer parameter for the method.
• optimization: SLOT-VALUE &co are now ~50% faster for variable slot names, when the class of the instance is a direct instance STANDARD-CLASS or FUNCALLABLE-STANDARD-CLASS (making them only 3x as slow as the constant slot-name case.)
• optimization: member type construction is now O(N) instead of O(N^2).
• optimization: UNION and NUNION are now O(N+M) for large inputs as long as the :TEST function is one of EQ, EQL, EQUAL, or EQUALP.
• enhancement: DEFINE-MODIFY-MACRO lambda-list information is now more readable in environments like Slime which display it. (thanks to Tobias C. Rittweiler)
• bug fix: SB-EXT:COMPARE-AND-SWAP was non-atomic unless the compiler was able to infer the correct argument type for the object on which the CAS operation was being performed.
• bug fix: copy propagation interfered with parallel assignment semantics in local calls. (reported by Paul Khuong)
• bug fix: the signed modular fixnum shift compiled to wrong code on x86 and x86-64. (spotted by a slight modification to some of PFD's random tests)

New in version 1.0.9

• minor incompatible change: SB-SYS:OUTPUT-RAW-BYTES is deprecated.
• enhancement: SB-EXT:FINALIZE accepts a :DONT-SAVE keyword argument, indicating the finalizer should be cancelled when SAVE-LISP-AND-DIE is called.
• enhancement: default PRINT-OBJECT methods for classes, slot-definitions, and generic function now print the object identity for anonymous instances. (thanks to Attila Lendvai)
• enhancement: as an extension to MOP, SBCL now supports SETF of STANDARD-INSTANCE-ACCESS and FUNCALLABLE-STANDARD-INSTANCE-ACCESS. (thanks to Attila Lendvai)
• enhancement: sb-cover has an alternate annotation mode which puts the form annotations at the car of the form, instead of annotating it completely. The benefit of this mode is that it shows better which forms were instrumented by the compiler.
• bug fix: new compiler transforms for MEMBER and ASSOC were affected by printer control variables. (reported by Dan Corkill)
• bug fix: system leaked memory when delayed output was performed by the OS in smaller chunks then expected. (thanks to David Smith)
• bug fix: system leaked memory when file streams were not closed properly.
• bug fix: large objects written to slow streams that were modified after the write could end up with the modified state written to the underlying file descriptor.
• bug fix: multiple threads operating in parallel on the same stream could cause buffer-overflows.
• bug fix: source location information is stored correctly (broken since 1.0.6). This bug would generally show up as the Slime debugger highlighting the wrong form when the sldb-show-source command was used.
• bug fix: Branch forms are again annotated as branches in the sb-cover annotations.
• bug fix: GCD on MOST-NEGATIVE-FIXNUM no longer causes an infinite loop on x86-64. (reported by Gregory Vanuxem)
• bug fix: EQUALP could return wrong results for structures with raw slots (slots with a :TYPE of SINGLE-FLOAT, DOUBLE-FLOAT, or a machine word). (reported by Vjacheslav Fyodorov)
• bug fix: sb-sprof sampling didn't work on non-x86oid platforms. (patch by Pierre Mai)

New in version 1.0.8

• enhancement: experimental macro SB-EXT:COMPARE-AND-SWAP provides atomic compare-and-swap operations on threaded platforms.
• enhancement: experimental function SB-EXT:RESTRICT-COMPILER-POLICY allows assigning a global minimum value to optimization qualities (overriding proclamations and declarations).
• enhancement: closed over variables can be stack-allocated on x86 and x86-64.
• performance bug fix: GETHASH and (SETF GETHASH) are once again non-consing.
• optimization: slot definition lookup is now O(1). This speeds up eg. SLOT-VALUE and (SETF SLOT-VALUE) with variable slot names.
• optimization: STRING-TO-OCTETS is now up to 60% faster for UTF-8.
• optimization: ASSOC and MEMBER can now be open-coded for all combinations of keyword arguments when second argument is constant and SPEED >= SPACE. In other cases a specialized version is selected.
• bug fix: using obsoleted structure instances with TYPEP and generic functions now signals a sensible error.
• bug fix: threads waiting on GET-FOREGROUND can be interrupted. (reported by Kristoffer Kvello)
• bug fix: backtrace construction is now more careful when making lisp-objects from pointers on the stack, to avoid creating bogus objects that can be seen by the GC.
• bug fix: defaulting of values in contexts expecting more than 7 variables now works on x86-64. (reported by Christopher Laux)
• bug fix: modifications to packages (INTERN, EXPORT, etc) are now thread safe.
• bug fix: (SETF SYMBOL-PLIST) no longer allows assigning a non-list as the property-list of a symbol.
• bug fix: DEFMETHOD forms with CALL-NEXT-METHOD in the method body, in EVAL-WHEN forms with both :COMPILE-TOPLEVEL and :LOAD-TOPLEVEL situations requested, are once again file-compileable. (reported by Sascha Wilde)

New in version 1.0.7

• MOP improvement: support for user-defined subclasses of SB-MOP:SPECIALIZER has been enhanced. The experimental interface function SB-PCL:MAKE-METHOD-SPECIALIZERS-FORM, called as part of the expansion of DEFMETHOD, is responsible for generating a form which creates a list of specializers when evaluated. Additional functions SB-PCL:[UN]PARSE-SPECIALIZER-USING-CLASS provide debugging and introspective support.
• minor incompatible change: the (unsupported) spinlock interface has changed: free spinlock now has the value NIL, and a held spinlock has the owning thread as its value.
• enhancement: WITHOUT-INTERRUPTS now binds ALLOW-WITH-INTERRUPTS and WITH-LOCAL-INTERRUPTS as local macros. Refer to documentation string for details.
• enhancement: name of a socket-stream is now "a socket" instead of "a constant string".
• enhancement: SB-POSIX now supports lockf(). (Thanks to Zach Beane.)
• enhancement: SB-POSIX now supports getcwd(). (Thanks to Tassilo Horn.)
• enhancement: SB-INTROSPECT:FUNCTION-ARGLIST shows nicer argument lists for generic functions. (Thanks to Tobias C. Rittweiler)
• optimization: bignum printing speed has been improved by 20-40% (depending on the bignum size.)
• bug fix: WITH-MUTEX and WITH-RECURSIVE-LOCK are now interrupt safe on Linux.
• bug fix: the cache used by the CLOS to store precomputed effective methods, slot offsets, and constant return values is now thread and interrupt safe.
• bug fix: generic function dispatch function updating is now thread and interrupt safe (in the sense that the known issues have been fixed.)
• bug fix: ADD/REMOVE-METHOD is now thread and interrupt safe.
• bug fix: interning EQL-specializers is now thread and interrupt safe.
• bug fix: asdf systems with dependencies to the SB-POSIX or SB-BSD-SOCKETS contribs can be loaded with :FORCE T.
• bug fix: interrupt safety of applicable method computation has been improved.

New in version 1.0.6

• new contrib: sb-cover, an experimental code coverage tool, is included as a contrib module.
• optimization: STRING-TO-OCTETS for unibyte encodings and UTF-8 is significantly faster.
• optimization: calls of the form (AREF FOO (+ INDEX <constant>)) now produce more efficient code on x86-64 if the compiler can determine that (+ INDEX <constant>) does not require a bounds check and FOO has an element type at least 8 bits wide.
• enhancement: a new, experimental synchronous timeout facility is provided. Refer to SB-SYS:WITH-DEADLINE for details.
• enhancement: when a symbol name conflict error arises, the conflicting symbols are always printed with a package prefix. (thanks to Kevin Reid)
• enhancement: stepping is now once again supported on the SPARC and MIPS platforms. (It is also now more likely to work on CheneyGC builds on the PPC.)
• enhancement: sb-sprof can now also track and report accurate call counts.
• bug fixes: the treatment of non-standard subclasses of SB-MOP:SPECIALIZER is more correct.
• incompatible change: PURIFY no longer copies the data from the dynamic space into the static and read-only spaces on platforms that use the generational garbage collector
• bug fix: GETHASH, (SETF GETHASH), CLRHASH and REMHASH are now interrupt safe.
• bug fix: GC race condition occasionally resulting in crashes with the error message "SIG_STOP_FOR_GC blocked at a bad place" has been fixed.
• bug fix: &ENVIRONMENT variables in macro lambda lists can now be declared ignored.
• bug fix: DEFSETF lambda lists without &ENVIRONMENT no longer cause a STYLE-WARNING to be signalled (regression from 1.0.4.)
• bug fix: an asynchronous interrupt could previously leave the system running with GC inhibited.
• bug fix: a DECLARE form evaluated at top-level now causes an error rather than silently (or verbosely) returning NIL.
• bug fix: trying to dissassemble functions compiled at high DEBUG could result in a error being signalled due to source form lookup errors. (reported by Peter Graves)

New in version 1.0.5

• incompatible change: removed writer methods for host-ent-name, host-ent-addresses -- changing the values did not update the DNS information anyway.
• minor incompatible change: changed experimental JOIN-THREAD interface
• documentation: the manual now lists reader and writer methods in class slot documentation sections. (thanks to Richard M Kreuter)
• documentation: unwinding from asyncronous events has been documented as unsafe.
• documentation: SB-SYS:WITHOUT-GCING has been documented as unsafe in multithreaded application code.
• optimization: GET-INTERNAL-REAL-TIME has been optimized on POSIX platforms. (thanks to James Anderson for the optimization hint)
• optimization: REPLACE, SUBSEQ, and COPY-SEQ are now optimized in more cases.
• optimization: STRING-{EQUAL,LESSP,GREATER-P} and their NOT- variants no longer cons.
• optimization: Direct calls to CHAR-{EQUAL,LESSP,GREATERP} and their NOT- variants no longer cons.
• optimization: EQUAL hash tables no longer use SXHASH for objects of all data types, but instead use an EQL hash for types for which EQUAL is the same as EQL.
• optimization: the non-inlined generic versions of AREF and (SETF AREF) are significantly faster.
• optimization: new STRING-OUTPUT-STREAM implementation is much faster for large outputs and conses 30% less on average.
• enhancement: XREF information is now collected for references made to global variables using SYMBOL-VALUE and a constant argument.
• enhancement: SIGINT now causes a specific condition SB-SYS:INTERACTIVE-INTERRUPT to be signalled.
• bug fix: FILE-POSITION used to signal an error in some cases where ANSI requires it to return NIL.
• bug fix: ADJUST-ARRAY is now interrupt-safe.
• bug fix: adding and removing fd-handlers is now interrupt-safe.
• bug fix: inlined calls to C now ensure 16byte stack alignment on x86/Darwin.
• bug fix: bad type declaration in the CLOS implementation has been fixed. (reported by James Anderson)
• bug fix: incorrect ROOM reporting on x86-64 has been fixed. (thanks to Lutz Euler)
• bug fix: DEFSETF now allows &ENVIRONMENT and disallows &AUX as required by the CLHS. (reported by Samium Gromoff)
• bug fix: dead unbound variable references now signal an error. (reported by Marco Monteiro)
• bug fix: / with an unused value was being deleted in safe code. (thanks to Marco Monteiro and Kevin Reid)
• bug fix: number of characters that can be written onto a single line in a file is unlimited.
• bug fix: some GC deadlocks caused by asynchronous interrupts have been fixed by inhibiting interrupts for when GC is disabled.
• bug fix: some interrupt safety issues with GETHASH, (SETF GETHASH), CLRHASH and REMHASH have been fixed.
• bug fix: binding *BREAK-ON-SIGNALS* to a value that is not a type specifier no longer causes infinite recursion.
• bug fix: SB-EXT:MUFFLE-CONDITIONS declarations no longer trigger a bogus warning in DEFMETHOD bodies. (reported by Kevin Reid)
• bug fix: an &environment argument with the correct variable information is passed to macros that are expanded during byte compilation. (reported by Samium Gromoff)
• bug fix: a logic error was causing the hash function for bignums to have excessive amounts of collisions. (reported by Faré Rideau)
• bug fix: modifying the contents of an array could change the return value of SXHASH on that array, which is only allowed for strings and bit vectors. (bug introduced in 0.9.16)
• improvement: the x86-64/darwin port now passes all tests (except for the debugger tests) but should still be considered experimental until this is fixed.
• improvement: a style-warning is signaled for CASE (etc) clauses with duplicate keys. (thanks to Kevin Reid)
• improvement: macos/x86 and macos/x86-64 now use mach exception handlers for dealing with illegal instructions (for trapping and error handling) and memory protection violations (for GC).

New in version 1.0.4

• new platform: experimental support for x86-64/darwin (MacOS).
• incompatible change: the thread-safe (on most platforms) getaddrinfo and getnameinfo sockets functions are used instead of gethostbyaddr and gethostbyname, on platforms where the newer functions are available. As a result, the ALIASES field of HOST-ENT will always be NIL on these platforms.
• change: runtimes with embedded cores (i.e. saved with :EXECUTABLE T) don't print the startup banner, but behave as if --noinform was passed as a command line argument. (thanks to Kevin Reid)
• new experimental feature: added JOIN-THREAD (by NIIMI Satoshi)
• optimization: code using alien values with undeclared types is much faster.
• optimization: the compiler is now able to open code SEARCH in more cases.
• optimization: more compact typechecks on x86-64 (thanks to Lutz Euler)
• bug fix: using standardized COMMON-LISP special variables as loop variables no longer signals bogus package lock violations. (reported by Eric Marsden)
• bug fix: declaring local loop variables to be of a range-limited type such as (SINGLE-FLOAT 1.0 2.0) no longer causes a compile-time error. (reported by Andras Simon)
• bug fix: >= and <= gave wrong results when used with NaNs. (Some NaN bugs remain on x86-64.)
• bug fix: the #= and ## reader macros now interact reasonably with funcallable instances.
• bug fix: type-checks for function arguments were compiled using the compiler policy settings of the wrong lexical environment (in 1.0.2 and 1.0.3).
• bug fix: SHADOW accepts characters as string designators, as required by the spec (thanks to Eric Marsden)
• bug fix: fixed GC safety issues when foreign functions are called with non-base strings as arguments
• bug fix: more consistent error output for fatal-compiler-warnings, like reader errors
• bug fix: functions with proper names were showing up as NIL in backtraces (reported by Edi Weitz, regression in 1.0.2)

New in version 1.0.3

• new platform: NetBSD/PPC. (thanks to Aymeric Vincent)
• optimization: calls of the form (AREF FOO (+ INDEX <constant>)) now produce more efficient code on the x86 if the compiler can determine that (+ INDEX <constant>) does not require a bounds check and FOO has an element type at least 8 bits wide.
• bug fix: references to undefined variables are handled the same way in toplevel forms as in the normal compiler
• bug fix: the build scripts again work with non-bash /bin/sh (thanks to Magnus Henoch)
• bug fix: use "gtar" as the asdf-install *TAR-PROGRAM* on NetBSD (thanks to Jon Buller)
• improvement: faster compilation times for complex functions
• improvement: added readlink support to SB-POSIX (thanks to Richard M Kreuter)

New in version 1.0.2

• improvement: experimental support for mach exception handling on x86/macos. requires building with :MACH-EXCEPTION-HANDLER feature to use.
• improvement: support for GBK external format. (thanks to Chun Tian (binghe))
• improvement: the debugger now displays variables that have been closed over, in code compiled with (DEBUG 2) or higher
• improvement: support for executable cores on NetBSD (thanks to Richard Kreuter)
• new feature: added a RESTART-FRAME debugger command
• new feature: new generic function SB-GRAY:STREAM-FILE-POSITION can be used to provide an implementation for FILE-POSITION on Gray streams (thanks to Eric Marsden)
• new feature: add syslog, openlog and closelog support to SB-POSIX (thanks to Richard Kreuter)
• optimization: the function call overhead in code compiled with a high DEBUG optimization setting is significantly
• bug fix: an error is signaled for attempts to use READ-SEQUENCE for a (SIGNED-BYTE 8) stream and (UNSIGNED-BYTE 8) vector, or vice versa. (thanks to Tony Martinez)
• bug fix: the initforms for DEFMETHOD &AUX parameters are only evaluated once (reported by Kevin Reid)
• bug fix: the :SHOW-PROGRESS keyword parameter to SB-SPROF:WITH-PROFILING works again (thanks to Kilian Sprotte)
• bug fix: an error is signaled for tagbodies with duplicate tags (thanks to Stephen Wilson)
• bug fix: NIL can be used as a tagbody tag (thanks to Stephen Wilson)
• bug fix: Win32 port can now handle foreign code unwinding Lisp stack frames from alien callbacks.
• bug fix: ATANH returned incorrect results on win32 (thanks to Pierre Mai)
• bug fix: SBCL works on Linux/ppc systems with a kernel configured to use 65k pages (thanks to David Woodhouse)
• bug fix: fix SB-POSIX dirent and socket on NetBSD (thanks to Richard Kreuter)

New in version 1.0.1

• new platform: FreeBSD/x86-64, including support for threading.
• new feature: the compiler stores cross-referencing information about function calls (who-calls), macroexpansion (who-macroexpands) and special variables (who-binds, who-sets, who-references) for code compiled with (< SPACE 3). This information is available through the sb-introspect contrib.
• new feature: users may subclass SEQUENCE, and have instances of these classes interoperate with standard Common Lisp functions if a number of methods are defined. (This feature is experimental and the interface subject to change based on feedback from SBCL users and the general community)
• improvement: sb-sprof traces call stacks to an arbitrary depth on x86/x86-64, rather than the previous fixed depth of 8
• improvement: another pthread back-end of mutex "pthread-futex".
• bug fix: non-ascii command-line arguments are processed correctly (thanks to Yaroslav Kavenchuk)
• bug fix: non-required arguments were not passed correctly when a method defined using DEFMETHOD was called from a mop-generated method using CALL-NEXT-METHOD (reported by Pascal Costanza)
• bug fix: recursion is now permitted in accessors through SLOT-UNBOUND. (reported by Pascal Costanza)
• bug fix: an error was signaled at startup if the HOME environment variable was defined, but had an empty value (reported by Peter Van Eynde)
• bug fix: non ordinary lambda-list keyword in ordinary lambda lists signal a PROGRAM-ERROR, not a BUG.
• bug fix: SB-POSIX:READDIR works when built with large file support.
• bug fix: ENOUGH-NAMESTRING works relative to #p"/" as well. (thanks to Marco Monteiro)
• enhancement: DESTRUCTURING-BIND lambda-list uses &BODY instead of &REST for better automatic indentation support. (thanks to Matt Pillsbury)
• optimization: loading generic functions no longer takes O(n^2) time, proportional to the amount of methods in the generic function (reported by Todd Sabin and Jeremy Brown)
• optimization: the FIND and POSITION family of sequence functions are significantly faster on arrays whose element types have been declared.
• improvements to the Windows port:
  • Intermittent heap corruption problems have been fixed. (thanks to Alastair Bridgewater)
  • TRACE :ENCAPSULATE NIL (and function end breakpoints) work on Windows.
  • Lisp is able to unwind foreign exception frames from alien callbacks. (thanks to Alastair Bridgewater)

New in version 1.0

• improvement: experimental support for threading on FreeBSD/x86. (thanks to NIIMI Satoshi)
• improvement: runtime option --dynamic-space-size can be used to set the size of the dynamic space reserved on startup.
• improvement: floating point modes in effect are now saved in core, and restored on startup.
• improvement: GET-INTERNAL-REAL-TIME now reports the time since startup, not time since first call to GET-INTERNAL-REAL-TIME.
• improvement: SAVE-LISP-AND-DIE explicitly checks that multiple threads are not running after *SAVE-HOOKS* have run.
• improvement: writes to CLOS instance slots are type-checked in code compiled with (SAFETY 3)
• improvement: floating-point exception handling on FreeBSD (thanks to NIIMI Satoshi)
• improvement: SB-POSIX supports time(2), utime(2) and utimes(2) (thanks to Zach Beane)
• improvement: support for files larger than 2GB for CL streams and SB-POSIX on Linux/x86
• improvement: added support for the Shift-JIS external format. (contributed by NIIMI Satoshi)
• improvement: callbacks are supported on Linux/PPC. (thanks to Joshua Ross)
• bug fix: compiler bug triggered by a (non-standard) VALUES declaration in a LET* was fixed. (reported by Kaersten Poeck)
• bug fix: file compiler no longer confuses validated and already dumped structurres. (reported by Kaersten Poeck)
• bug fix: ADJUST-ARRAY :FILL-POINTER T on an array without a fill-pointer signals a type-error as required. (thanks to Lars Brinkhoff)
• bug fix: disassemly of funcallable instances works.
• bug fix: single stepping on PPC.
• bug fix: fix thread-safety problems in the type system (generally manifesting as nonsensical errors like "STRING is a bad type specifier for sequences" or "The value 1 is not of type FIXNUM")
• bug fix: version components are handled correctly in TRANSLATE-PATHNAME (reported by Josip Gracin)
• bug fix: an error is signaled for attempts to displace arrays with incompatible element types (thanks to Mario Mommer)
• bug fix: more correct handling of wide characters in debug info (bug reported by Attila Lendvai and fixed by Juho Snellman)
• optimization: method calls with &OPTIONAL or &KEY arguments are faster and don't cause extra consing
• optimization: MAP and MAP-INTO are significantly faster on vectors whose elements types have been declared.
• Improvements to SB-SPROF:
  • Support for allocation profiling
  • Reduced profiling overhead, especially for long profiling runs
• Improvements to the Windows port:
  • floating point exceptions are now reported correctly.
  • stack exhaustion detection works partially.
  • more accurate GET-INTERNAL-REAL-TIME.
  • better RUN-PROGRAM behaviour in case of errors in the child process.
  • PROBE-FILE now simplifies pathnames correctly.
  • DIRECTORY now works correctly with :WILD-INFERIORS.
  • DECODE-UNIVERSAL-TIME works on times before 00:00:00 January 1st 1970 (although time timezone data will be unreliable).
  • Hyperbolic functions TANH, ASINH, ACOSH, and ATANH work.

New in version 0.9.18

• enhancement: SB-POSIX now supports cfsetispeed(3), cfsetospeed(3), cfgetispeed(3), cfgetospeed(3), and related constants. (thanks to Max-Gerd Retzlaff)
• bug fix: two potential GC deadlocks affecting threaded builds.
• bug fix: (TYPEP #\A '(NOT (MEMBER #\" #\{ #\:))) now correctly returns T (reported by Anton Kazennikov)
• bug fix: the STORE-VALUE restart of CHECK-TYPE works correctly with non-variable places
• bug fix: remove a race condition in the setting of funcallable-instance functions, this should make threaded CLOS code more stable against memory faults.
• bug fix: corruption of specials when unbinding is interrupted by an asynchronous unwind (reported by Hannu Koivisto)
• improvement: the debugger will now also display local variables that are only used once, for code compiled with a DEBUG optimization quality of 2 or higher.

New in version 0.9.17

• feature: weak hash tables, see MAKE-HASH-TABLE documentation
• incompatible change: External-format support for FFI calls. The SB-ALIEN:C-STRING no longer implies an ASCII external-format. Instead the string is subject to external-format conversion. Additionally return values of type SB-ALIEN:C-STRING are by default of type (SIMPLE-ARRAY CHARACTER), not SIMPLE-BASE-STRING. For an alien type that behaves like the old SB-ALIEN:C-STRING type, use (SB-ALIEN:C-STRING :EXTERNAL-FORMAT :ASCII :ELEMENT-TYPE BASE-CHAR). (thanks to Yaroslav Kavenchuk)
• incompatible change: SB-EXT package no longer contains the following unused symbols: *GC-NOTIFY-AFTER*, *GC-NOTIFY-BEFORE*, *GC-NOTIFY-STREAM*, *ERROR-PRINT-LENGTH*, *ERROR-PRINT-LEVEL*, *ERROR-PRINT-LINES*
• incompatible change: the single-stepper is no longer available on Alpha, Mips and Sparc platforms.
• minor incompatible change: the direct superclasses of SB-MOP:FUNCALLABLE-STANDARD-OBJECT are (FUNCTION STANDARD-OBJECT), not (STANDARD-OBJECT FUNCTION). This makes the class-precedence-lists of GENERIC-FUNCTION and STANDARD-GENERIC-FUNCTION comply with the requirement of ANSI 1.4.4.5.
• minor incompatible change: the default stream external format on non-unicode SBCL is no longer detected from the locale, but is always ISO-8859-1
• new feature: Add a version of evaluator that uses an interpreter instead of the compiler. EVAL still uses the compiler by default, to switch it to use the interpreter, set the value of the variable SB-EXT:*EVALUATOR-MODE* to :INTERPRET.
• minor incompatible change: the single-stepper REPL has been merged with the normal debugger (see the "Stepping" heading of the debugger help for more details). The debugger command STEP will no longer switch to the single-stepper REPL.
• bug fix: ENOUGH-NAMESTRING on pathnames with no name and a pattern for a type now works.
• bug fix: loading of default sysinit file works. (thanks to Leonid Slobodov)
• bug fix: better detection of circularities in the file-compiler. (reported by Marco Monteiro)
• bug fix: the CL pathname functions now work with files that have non-ASCII characters in their names (thanks to Yaroslav Kavenchuk)
• bug fix: The :PTY argument for RUN-PROGRAM will now work on systems with Unix98 pty semantics.
• bug fix: ASDF-INSTALL will now work with bsd tar.
• bug fix: ASDF-INSTALL uses GNU tar on Solaris (thanks to Josip Gracin).
• bug fix: timers expiring in dead threads no longer cause a type-error (reported by Paul "Nonny Mouse").
• bug fix: thanks to more lightweight single-stepper instrumentation, code compiled with (DEBUG 3) will compile and execute significantly faster, and will have more accurate type-inferencing than before
• bug fix: SLOT-VALUE optimizations are no longer done on method parameters whose bindings are modified
• improvements to the win32 port (thanks to Yaroslav Kavenchuk):
  • bug fix: arguments to RUN-PROGRAM are escaped correctly
  • replace dummy implementations of CL:MACHINE-INSTANCE and CL:SOFTWARE-VERSION with proper version

New in version 0.9.16

• feature: implemented the READER-METHOD-CLASS and WRITER-METHOD-CLASS portion of the Class Initialization Protocol as specified by AMOP.
• incompatible change: variable SB-EXT:*USE-IMPLEMENTATION-TYPES* no longer exists.
• optimization: faster LOGCOUNT implementation on x86 and x86-64 (thanks to Lutz Euler)
• optimization: hashing of general arrays and vectors has been improved. (reported by Any Fingerhut)
• enhancement: SB-INTROSPECT is now able to find definitions of profiled functions. (thanks to Troels Henriksen)
• enhancement: compiler-macro expansion applies now to FUNCALL forms as well, allowing compiler-macros for SETF-functions to expand.
• enhancement: step-instrumentation no longer wraps known single-value functions with multiple-value context, allowing better type inference.
• fixed bug #337: use of MAKE-METHOD in method combination now works even in the presence of user-defined method classes. (reported by Bruno Haible and Pascal Costanza)
• fixed bug #339(c): if there are applicable methods not part of any long-form method-combination group, call INVALID-METHOD-ERROR. (reported by Bruno Haible)
• fixed bug #361: the :FUNCTION initarg in the protocol for initialization of methods can now be used to override internally-produced optimized functions. (reported by Bruno Haible)
• bug fix: extensions of MAKE-METHOD-LAMBDA which wrap the system-provided lambda expression no longer cause warnings about unbound #:|pv-table| symbols.
• bug fix: improved the handling of type declarations and the detection of violations for keyword arguments with non-constant defaults.
• bug fix: potentially erronous calls to PATHNAME and MERGE-PATHNAMES were being flushed in some cases. (reported by Richard Kreuter)
• bug fix: compiled calls to TYPEP were mishandling obsolete instances. (reported by James Bielman and Attila Lendvai)
• bug fix: format strings with ~> without matching ~< no longer trigger an AVER, but signal an understandable error instead. (reported by Antonio Martinez)
• bug fix: specifying an output-file without a pathname-type for COMPILE-FILE or COMPILE-FILE-PATHNAME resulted in using the type of input-file instead of "fasl". (reported by Robert Dodier)
• bug fix: compiler-macro lambda-list parsing of FUNCALL forms. (reported by James Y Knight).
• bug fix: compiler-macros-function did not consider the environment argument for shadowing by local functions.
• bug fix: compiler-macros expansion was inhibited by local INLINE declarations.
• bug fix: inline expansions of known functions were subject to step-instrumentation in high debug policies, leading to problems with type-inference.
• bug fix: compiler failed to differentiate between different CONS types in some cases.
• bug fix: fixed input, output and error redirection in RUN-PROGRAM for win32. (thanks to Mike Thomas and Yaroslav Kavenchuk)
• bug fix: #368: incorrect use of expressed vs. upgraded array element type.
• bug fix: #306a: more precise unions of array types.
• thread-safety improvements:
  • CONDITION-WAIT could return early on Linux, if the thread was interrupted and subsequently continued with SIGCONT.
  • STABLE-SORT and ADJUST-ARRAY were not reentrant.

New in version 0.9.15

• added support for the ucs-2 external format. (contributed by Ivan Boldyrev)
• minor incompatible change: pretty printing of objects of type (cons symbol) is, in the default pprint-dispatch-table, now sensitive to whether the symbol satisfies FBOUNDP. (thanks to Marcus Pearce)
• minor incompatible change: SB-MOP:FINALIZE-INHERITANCE is now called later in a class's lifetime, possibly as late as when the first instance of the class is created. Previously, SB-MOP:FINALIZE-INHERITANCE was called by the system as soon as a class became finalizeable.
• fixed bug: FILE-POSITION sometimes returned inconsistent results for multibyte external-format streams. (thanks to "vbzoli")
• fixed bug: CHANGE-CLASS would fail to preserve the values of slots with :ALLOCATION :CLASS inherited from superclasses of the original class.
• fixed bug: anonymous classes can now be created using the :NAME initarg and MAKE-INSTANCE / REINITIALIZE-INSTANCE, as specified by AMOP. (reported by Leonid Slobodov on comp.lang.lisp)
• fixed bug: core-files saved with :EXECUTABLE T can again be executed when SBCL_HOME isn't set. (reported by James Knight)
• fixed bug: toplevel LOCALLY forms with declarations could occasionally get miscompiled. (reported by Yaroslav Kavenchuk)
• fixed bug: printing from several different threads using different values of *print-case* could cause invalid output, due to some internal special variables of the printer not being bound thread-locally (reported by Max Mikhanosha)
• fixed bug: SPECIALIZER metaobjects (including anonymous classes and EQL-SPECIALIZERs) can be used as specializers to DEFMETHOD. (reported by Pascal Costanza)
• fixed bug: FINALIZE-INHERITANCE is called from REINITIALIZE-INSTANCE on classes when the class has previously been finalized, as required by AMOP.
• minor code generation optimizations:
  • better register allocation in CLOS dispatching functions
  • overflow detection when coercing signed bytes to fixnums on x86-64
  • is now implemented with one IMUL instruction instead of three shifts
  • more efficient bit-vector access on x86 and x86-64
  • more efficient access to raw structure slots on x86 and x86-64
• fixed some bugs revealed by Paul Dietz' test suite:
  • ENSURE-DIRECTORIES-EXIST.8: ENSURE-DIRECTORIES-EXIST must return its argument.

New in version 0.9.14

• feature: thread support on Solaris/x86, and experimental thread support on OS X/x86.
• feature: SBCL now tries to signal a STORAGE-CONDITION when running out of heap.
• feature: SBCL now provides USE-VALUE and STORE-VALUE restarts in the default method for SLOT-UNBOUND.
• minor incompatible change: prevent the user from specializing the new-value argument to SB-MOP:SLOT-VALUE-USING-CLASS. It's somewhat counter to the intent of the protocol, I (CSR) think, and additionally it just doesn't work in SBCL as currently implemented, thanks to optimizations (that are always valid for the other three SLOT-VALUEish functions, but not for the setter).
• minor incompatible change: the :SB-LDB feature is now enabled by default, and DISABLE-DEBUGGER and ENABLE-DEBUGGER also affect the low-level debugger.
• enchancement: RUN-PROGRAM is now able to extract the file-descriptor from SYNONYM-STREAM and TWO-WAY-STEAMS provided they can be decomposed down to an SB-SYS:FD-STREAM, allowing direct communication in more cases. Temporary files and pipes are still used as a fallback strategy.
• thread-safety: DECODE-UNIVERSAL-TIME & GET-DECODED-TIME depended on the non-reentrant C functions localtime(3) and gmtime(3).
• bug fix: global optimization policy was not visible in LOCALLY and MACROLET forms.
• bug fix: class objects can be used as specializers in methods. (reported by Pascal Costanza)
• bug fix: native unparsing of pathnames with :DIRECTORY NIL failed with a type error. (reported by blitz_ on #lisp)
• bug fix: unparsing logical pathnames with :NAME :WILD :TYPE NIL failed with a type error. (reported by Pascal Bourguignon)
• bug fix: merging pathnames against defaults with :DIRECTORY starting with '(:RELATIVE :BACK) should preserve the :BACK. (reported by James Y Knight)
• bug fix: saving large (>2GB) cores on x86-64 now works
• bug fix: a x86-64 backend bug when compiling (setf aref) with a constant index and a (simple-array (signed-byte 32)) array
• bug fix: NAME-CHAR on an invalid symbol no longer signals an error (patch by Robert J. Macomber)
• feature: TIME now displays the amount of run-time spent in GC
• bug fix: The debugger now does a better job of respecting (PUSH '(*PRINT-CIRCLE* . T) SB-DEBUG:*DEBUG-PRINT-VARIABLE-ALIST*) when printing SB-DEBUG:*DEBUG-CONDITION*. (This is a debugger-only workaround for bug 403.)
• bug fix: floating point exception handling now works on FreeBSD (thanks to NIIMI Satoshi)
• fixed some bugs revealed by Paul Dietz' test suite:
  • MISC.641: LET-conversion were not supposed to work in late compilation stages.
• improvements to the Win32/x86 port:
  • GET-INTERNAL-RUN-TIME implemented, thanks to Frank Buss.
  • improved SB-BSD-SOCKETS support, thanks to Timothy Ritchey.

New in version 0.9.13

• new feature: source path information is generated for macro-expansion errors for use in IDE's like Slime (thanks to Helmut Eller)
• bug fix: calls to the compiler no longer modify *RANDOM-STATE*
• bug fix: compiler does not loop forever on an invalid type in TYPEP.
• improvement: compilation of most CLOS applications is significantly faster
• optimization: added a limited bytecode compiler for simple toplevel forms, speeding up compilation and FASL loading
• bug fix: the statistical profiler now properly distinguishes anonymous functions

New in version 0.9.12

• minor incompatible change: in sbcl-0.9.11 (but not earlier versions) SB-MOP:FINALIZE-INHERITANCE would recursively descend into subclasses of the finalized class. Now user calls to FINALIZE-INHERITANCE finalize just the one class, and calls by the system return before any subclasses are finalized.
• minor incompatible change: The reader no longer ignores errors regarding non-existent packages in #+ and #- feature tests.
• new feature: command line options --no-sysinit, --no-userinit to inhibit loading the corresponding init files
• new feature: add a generic function SOCKET-SEND to SB-BSD-SOCKETS, for sending data through UDP sockets (thanks to François-René Rideau)
• minor incompatible change: SIGPIPE is ignored and "Broken pipe" error is signalled instead (thanks to François-René Rideau)
• minor incompatible change: Error signalling behaviour of lexical operations violating package locks has changed slightly. Refer to documentation on package locks for details.
• enhancement: EVAL can process IF-expressions without resorting to the compiler.
• bug fix: Some operations involving SIN, COS, or TAN weren't being constant-folded properly due to missing out-of-line functions. (reported by Mika Pihlajamäki)
• bug fix: LISTEN sometimes returned T even in cases where no data was immediately available from the stream
• fixed bug: types of the last two arguments to SET-SYNTAX-FROM-CHAR were reversed. (reported by Levente Mészáros)
• fixed bug: Tests for the (VECTOR T) type gave the wrong answer when given a vector displaced to an adjustable array. (reported by Utz-Uwe Haus)
• bug fix: derivation of float boundaries from numbers outside the appropriate float range (reported by John Wiseman)
• bug fix: MAKE-LOAD-FORM-SAVING-SLOTS accepts en empty slot name list.
• bug fix: precomputing cache entries for generic functions with some subclasses of specializers as yet invalid does not attempt to fill a cache line with a negative offset. (reported by Levente Mészároz)
• improvements to DOCUMENTATION for TYPE and STRUCTURE doc-types: allow condition class objects as arguments to DOCUMENTATION and (SETF DOCUMENTATION); only find and set documentation for structure names for the STRUCTURE doc-type. (suggested by Gary King)
• improvements to the Win32/x86 port:
  • (user-homedir-pathname) and default initialization file locations now know about the user's "Documents and Settings" directory (thanks to Yaroslav Kavenchuk)
  • run-program is implemented (thanks to Mike Thomas)
  • sockets support (thanks to Timothy Ritchey)
  • better backtrace support (thanks to Alastair Bridgewater)
  • sb-grovel supported
  • asdf-install and sb-posix work somewhat
  • capable of running Slime using SWANK:*COMMUNICATION-STYLE* NIL
• improvements to the Solaris/x86 port:
  • works on Solaris 11/Solaris Express
  • floating-point exception handling support
  • support for the breakpoint-based TRACE :ENCAPSULATE NIL facility
• fixed some bugs revealed by Paul Dietz' test suite:
  • REMOVE-METHOD returns its generic function argument even when the method is not one of the generic functions' methods.
  • objects declared as MEMBER types can be admissible arguments to structure accessors.
  • printing characters should simply be printed by the FORMAT ~:C directive.
  • compiler failure when compiling functions with hairy constant defaults for optional parameters.
  • compiler produces wrong code when MAYBE-INLINE-expanding a function, which is already optimized.

New in version 0.9.11

• new platform: experimental support for SBCL x86/Darwin, including MacOS X 10.4.5 on Intel.
• new feature: Unicode character names are now known to the system (through CHAR-NAME and NAME-CHAR).
• new feature: the filesystem location of SBCL's core file is exposed to lisp through the variable SB-EXT:*CORE-PATHNAME*.
• minor incompatible change: the contrib modules SB-POSIX and SB-BSD-SOCKETS no longer depend on stub C libraries; the intent of this change is to make it easier to distribute location-independent binaries.
• bug fix: as implied by AMOP, standardized classes no longer have slots named by external symbols of public packages. (reported by Pascal Costanza)
• optimization: calling functions via constant symbols -- as in (FUNCALL 'FOO) -- is now roughly as efficient as calling them via the function object as in (FUNCALL #'FOO).
• optimization: on x86 and x86-64, the calling convention for the case of dealing with an unknown number of values has been altered to be friendlier to the prediction heuristics implemented, particularly with reference to CALL and RET pairing. (thanks to Alastair Bridgewater)
• optimization: on x86, the code for access to thread-local symbol values and binding/unbinding of thread-local symbols is smaller. (thanks to Alastair Bridgewater)
• enhancement: CONSTANTP is now able to determine constantness of more complex forms, including calls to constant-foldable standardized functions and some special forms beyond QUOTE.
• fixed bug: occasional GC crashes on Solaris/x86
• optimization: x86-64 supports stack allocation of results of simple calls of MAKE-ARRAY, bound to variables, declared DYNAMIC-EXTENT
• enchancement: the PROCESS-INPUT and -OUTPUT streams created by SB-EXT:RUN-PROGRAM can be used for both character and byte IO (thanks to James Knight)
• fixed bug: CL:LISTEN always returns NIL at end of file, as required by the standard (thanks to Stephen Compall)

New in version 0.9.10

• new feature: new SAVE-LISP-AND-DIE keyword argument :EXECUTABLE can be used for bundling the runtime and the core file into one executable binary. This feature is not currently supported on all SBCL platforms. (thanks to James Bielman and NIIMI Satoshi)
• new feature: a generational or ephemeral garbage collector is now the default on the PowerPC platform (both Linux and Darwin). The old Cheney (stop and copy) collector is a build-time option. (thanks to Cyrus Harmon, after Raymond Toy)
• minor incompatible change: the method by which SBCL finds its contributed modules has changed; it no longer relies on symbolic links from an $SBCL_HOME/systems directory, but searches directly in the subdirectories of $SBCL_HOME.
• enhancement: the dynamic heap size on the Linux/PPC platform is markedly larger, even using the older Cheney garbage collector.
• fixed bug #399: full call to DATA-VECTOR-REF in accesses to certain complicated string types. (reported by Gary King)
• fixed bug: STRING-TO-OCTETS and OCTETS-TO-STRING did not convert character codes. (thanks to Yaroslav Kavenchuk and Ivan Boldyrev)
• fixed bug: DOCUMENTATION on structures no longer signals an error if no structure type of the right name exists. (reported by Glenn Ehrlich)
• fixed bug: compiled calls to MAKE-INSTANCE where there is an applicable non-standard primary or :AROUND method on INITIALIZE-INSTANCE or SHARED-INITIALIZE and a non-keyword initarg no longer cause unbound variable errors. (reported by Kevin Reid)
• fixed bug: metacircle resolution in cases where methods have slots added before the slots from STANDARD-METHOD. (reported by Jean Bresson)
• fixed bug: the Power PC assembly code for calling into lisp sometimes computed its return address wrongly (depending on the 15th bit of the address, fixed at link time). This used to manifest itself in a segmentation violation while building PCL. (reported by Kevin Rosenberg, Eric Marsden, Lars Brinkhoff and many others over the years)
• fixed bug: ROOM no longer reports silly numbers for stack usage if the stack pointer (treated as a signed integer) is negative. (thanks to Peter van Eynde)

New in version 0.9.9

• new platform: experimental support for the Windows operating system has been added. (thanks to Alastair Bridgewater)
• fixed several bugs in and robustified the PPC FFI (including callbacks). (thanks to Cyrus Harmon and Heiner Schwarte)
• bug fix: allow non-simple string symbol names (reported by Paul Dietz)
• bug fix: interrupt handling on NetBSD (thanks to Richard M Kreuter)
• bug fix: saving a core corrupted callbacks on x86/x86-64
• bug fix: closed a loophole in metacircularity detection and grounding in the PCL implementation of CLOS.
• bug fix: TRUENAME on "/" no longer returns a relative pathname. (reported by tomppa on #lisp)
• bug fix: clear the direction flag on Lisp -> C transitions, as required by the x86-64 ABI. Fixes mysterious GC crashes on SuSE. (reported by Andrej Grozin and Hendrik Maryns)
• optimization: major improvements to GC efficiency on GENCGC platforms
• optimization: faster implementation of EQUAL
• optimization: emit more efficient opcodes for some common immediate->register MOV instructions on x86-64. (thanks to Lutz Euler)
• optimization: several other minor code-generation improvements on x86-64
• fixed segfaults on x86 FreeBSD 7-current. (thanks to NIIMI Satoshi)

New in version 0.9.8

• minor incompatible change: (SETF CLASS-NAME) and (SETF GENERIC-FUNCTION-NAME) are generic functions once more (reverting the change in the 0.9.7 release). (SETF CLASS-NAME) is specified by ANSI as a generic function, and for consistency (SETF GENERIC-FUNCTION-NAME) is treated likewise.
• fixed bug #233.b: make constraint propagation notice when a variable value is changed after it is referenced but before it is used
• fixed bug #296: no more arbitrary behaviour from filenames with odd characters as --load arguments. (reported by Adam Warner)
• fixed bug #390: :CHARACTER-SET pathname components now work as expected. (reported by Tim Daly Jr)
• fixed bug #391: complicated :TYPE intersections in slot definitions no longer cause an error in PCL internals.
• fixed bug #392: plugged a hole in the obsolete-instance protocol.
• bug fix: FILE-STRING-LENGTH is now external-format sensitive, returning the number of octets which would be written to the file-stream. (thanks to Robert J. Macomber)
• bug fix: the SB-SIMPLE-STREAMS contrib passes external-format arguments to the internal stream functions. (thanks to David Lichteblau)
• bug fix: stack exhaustion is now handled on the x86/SunOS platform. (thanks to Daisuke Homma)
• bug fix: more accurate ROOM results on GENCGC platforms
• optimization: improved type inference for arithmetic-for index variables in LOOP
• optimization: faster floating-point SQRT on x86-64
• fixed some bugs revealed by Paul Dietz' test suite:
  • DOCUMENTATION returns NIL instead of "" for method combinations that don't have a docstring 

New in version 0.9.7

• minor incompatible change: (SETF CLASS-NAME) and (SETF GENERIC-FUNCTION-NAME) are no longer generic functions, and therefore are not customizeable by user code (as seems to be at least permitted and maybe required by AMOP). As a consolation, however, the SBCL implementation of these functions now calls REINITIALIZE-INSTANCE as specified by AMOP.
• bug fix: slot-definition documentation is propagated as per ANSI 7.6.2 to EFFECTIVE-SLOT-DEFINITIONS. COMPUTE-EFFECTIVE-SLOT-DEFINITION now receives a :DOCUMENTATION argument, as do eslotd initialization methods. (from Pascal Costanza's "Closer" project)
• bug fix: REINITIALIZE-INSTANCE on generic functions calls COMPUTE-DISCRIMINATING-FUNCTION (almost) unconditionally, as specified by AMOP.
• bug fix: it is now possible to have more than one subclass of STANDARD-GENERIC-FUNCTION without causing stack overflow. (reported by Bruno Haible, Pascal Costanza and others)
• bug fix: the dependent update protocol now works for generic functions. (thanks to Gerd Moellmann; reported by Bruno Haible and Pascal Costanza)
• bug fix: condition-class instances corresponding to DEFINE-CONDITION forms are now created eagerly. (reported by Kalle Olavi Niemitalo on comp.lang.lisp)
• bug fix: floating point printing is more accurate in some circumstances. (thanks to Simon Alexander)
• bug fix: *COMPILE-FILE-PATHNAME* now contains the user's pathname merged with *DEFAULT-PATHNAME-DEFAULTS*.
• bug fix: callbacks on OS X now preserve stack-alignment. (thanks to Cyrus Harmon)
• enhancement: the x86-64 disassembler is much better at disassembling SSE instructions. (thanks to Lutz Euler)
• enhancement: CHECK-TYPE on a variable now allows type-inference (thanks to Vincent Arkesteijn)
• optimization: improved performance of EUC-JP external format. (thanks to NIIMI Satoshi)
• optimization: performance improvements to IO on file streams of :ELEMENT-TYPE CHARACTER
• optimization: much faster memory allocation on x86-64
• optimization: faster garbage collections (latency and throughput) on gencgc
• optimization: faster bignum subtraction and division on x86 and x86-64 (thanks to Lutz Euler)
• optimization: more accurate type-inference for loops that use a floating point index variable or a negative step.

New in version 0.9.6

• bug fix: add a workaround to SBCL looping infinitely at startup on Linux kernels with apparently buggy implementations of personality(). (thanks to Svein Ove Aas)
• bug fix: Unicode symbols are correctly printed in LDB backtraces (thanks to David Lichteblau)
• bug fix: local bindings shadow global symbol macros for macroexpansion. (reported by Matthew D Swank on comp.lang.lisp)
• optimization: non-open coded uses of numeric comparison operators (e.g. >) no longer cons when called with more than one parameter on platforms supporting dynamic-extent allocation.
• enhancement: saving cores with foreign code loaded is now supported on MIPS/Linux in addition to the previously supported platforms.
• bug fix: FIND-RESTART now tests for activity, not applicability when given a restart object as identifier. (reported by Helmut Eller for CMUCL)
• bug fix: division by zero in sb-sprof when no samples were collected
• bug fix: a race when a slow to arrive sigprof signal killed sbcl
• bug fix: asdf-install uses CRLF as required by the HTTP spec. (thanks to Alexander Kjeldaas)
• new feature: ignoring the return values of destructive functions like NREVERSE signals a compile-time style-warning. (thanks to Kevin Reid)
• new feature: the alignment of alien structure fields can be explicitly specified. (thanks to Cyrus Harmon)
• bug fix: run cleanup forms (in all threads) when receiving a SIGTERM and dump core on SIGQUIT
• threads
  • incompatible change: threads do not inherit values of specials from their parents (see manual)
  • bug fix: threads stacks belonging to dead threads are freed by the next exiting thread, no need to gc to collect thread stacks anymore
  • minor incompatible change: INTERRUPT-THREAD-ERROR-ERRNO removed
  • WITH-RECURSIVE-LOCK can be nested in a WITH-MUTEX for the same lock
  • bug fix: dynamic variable and thread start related gc lossage
  • bug fix: job control (SIGSTOP/SIGCONT) no longer confuses threads suspended for gc
• fixed some bugs revealed by Paul Dietz' test suite:
  • SUBTYPEP is slightly more accurate on heinously complicated CONS types where some of the members have uncertain (in the NIL, NIL sense) type relationships to each other.
• GENCGC
  • Cores produced by SAVE-LISP-AND-DIE on GENCGC platforms are no longer purified unless :PURIFY T is explicitly specified.
  • Non-purified cores are significantly smaller than before

New in version 0.9.5

• new feature: timers based on Zach Beane's excellent timer package
• added support for the following external formats: koi8-u, x-mac-cyrillic, cp437, cp850, cp852, cp855, cp857, cp860, cp861, cp862, cp863, cp864, cp865, cp866, cp869, cp874, iso-8859-2, iso-8859-3, iso-8859-4, iso-8859-5, iso-8859-6, iso-8859-7, iso-8859-8, iso-8859-9, iso-8859-10, iso-8859-11, iso-8859-13, iso-8859-14, cp1250, cp1251, cp1252, cp1253, cp1254, cp1255,cp1256, cp1257, cp1258 (contributed by Ivan Boldyrev)
• incompatible change: a threaded SBCL will no longer revert to non-threaded mode on non-NPTL systems, but refuse to start entirely.
• bug fix: interrupts are disabled until startup is complete; no more sigsegvs when receiving a signal to soon
• optimization: faster 32-bit SB-ROTATE-BYTE:ROTATE-BYTE on non-x86/ppc platforms
• bug fix: add a workaround for the memory randomization features in Linux kernels >= 2.6.12 that interfere with SBCL's memory maps. This workaround will only be in effect on systems with the proc filesystem mounted.
• bug fix: printing objects of type HASH-TABLE signals a PRINT-NOT-READABLE error when *READ-EVAL* is NIL. (reported by Faré Rideau)
• bug fix: GET-INTERNAL-REAL-TIME now works even for processes that have been running for over 50 days. (reported by Gilbert Baumann)
• bug fix: the logic for getting names of functions gets less confused when confronded with alternate-metaclass funcallable-instances. (reported by Cyrus Harmon)
• bug fix: FUNCTIONP and (LAMBDA (X) (TYPEP X 'FUNCTION)) are now consistent, even on internal alternate-metaclass objects.
• bug fix: flush closure information collected by physical environment analysis prepass before the main pass. (bug reported by Vasile Rotaru)
• bug fix: compiler pack phase does not modify a hashtable, which is iterated. (reported by Bryan O'Connor, fixed by Rob MacLachlan)
• bug fix: backquote does not optimize (LIST* x y) to CONS when x may be expanded. (reported by Alexander <malishev> on c.l.l)
• bug fix: no more style-warnings when compiling code using LAST under high-SPEED low-SPACE settings. (reported by David Wallin aka froog on #lisp)
• fixed some incompatibilities between SBCL's MOP and the MOP specified by AMOP:
  • the METAOBJECT class is now implemented;
  • FUNCALLABLE-STANDARD-OBJECT is now a subclass of STANDARD-OBJECT, as required;
  • the classes STANDARD-CLASS and FUNCALLABLE-STANDARD-CLASS are now compatible (as required by VALIDATE-SUPERCLASS); there remains a consistency requirement over the presence or absence of the FUNCTION class in the superclass list of finalized classes; see the manual for more details;
  • the :AROUND method for COMPUTE-SLOTS on FUNCALLABLE-STANDARD-CLASS now honours the primary method's requested slot ordering.
• threads
  • bug fix: parent thread now can be gc'ed even with a live child thread
  • bug fix: binding a special with PROGV to no value is not the same as that symbol not having been bound (thanks to Hannu Koivisto)
  • bug fix: binding specials is thread safe (thanks to Hannu Koivisto)
  • bug fix: interrupt handlers are now per-process, RUN-PROGRAM and SB-SPROF do not die with 'no handler for signal XX in interrupt_handle_now(..)' anymore
  • bug fix: WITH-TIMEOUT works with multiple running threads
• fixed some bugs revealed by Paul Dietz' test suite:
  • ENSURE-GENERIC-FUNCTION should take a method class object for the :method-class keyword argument.

New in version 0.9.4

• new port: the Solaris operating system on x86 processors is now mostly supported, though some rough edges in the environment remain. (thanks to Daisuke Homma)
• enhancement: SBCL on MIPS platforms now has a much larger dynamic space for its heap. (thanks to Thiemo Seufer)
• optimization: SBCL on MIPS platforms now supports dynamic-extent closures. (thanks to Thiemo Seufer)
• minor incompatible change: eof selects abort in the debugger.
• minor incompatible change: *INVOKE-DEBUGGER-HOOK* is run before *DEBUGGER-HOOK* => *DEBUGGER-HOOK* is not run when the debugger is disabled.
• minor incompatible change: SB-KERNEL:INSTANCE-LAMBDA is deprecated, and will go away in a future revision of SBCL.
• minor incompatible change: GC-ON and GC-OFF are no longer implemented with a counter, it does not matter how many times gc is switched on or off
• bug fix: discriminating functions for generic function classes with non-standard methods for COMPUTE-APPLICABLE-METHODS no longer make invalid assumptions about method precedence order. (reported by Bruno Haible)
• bug fix: TRUNCATE now correctly signals division by zero on MIPS platforms. (thanks to Thiemo Seufer)
• bug fix: degree sign (<U00B0>) could not be encoded in KOI8-R.
• bug fix: correct pathname printing with printer escaping is on. (thanks to Kevin Reid)
• bug fix: complex VOP definitions in "user-space" no longer trigger package locks. (reported by Zach Beane)
• fixed bug 343: SB-KERNEL:INSTANCE-LAMBDA is no longer necessary for funcallable-instance functions, and is no different from regular LAMBDA.
• bug fix: PARSE-INTEGER no longer depends on the whitespaceness of characters in the current readtable. (reported by Nicholas Neuss)
• bug fix: SUBTYPEP on various CONS types returns more a more accurate acknowledgment of its certainty.
• optimizations: REMOVE-DUPLICATES now runs in linear time on lists in some cases. This partially fixes bug 384.
• flush all standard streams before prompting in the REPL and the debugger.
• bug fix: signal handling and triggering gc do not conflict directly anymore, in particular a high frequency sb-sprof does not prevent gc from running
• bug fix: DECODE-UNIVERSAL-TIME now uses a more reasonable approximation for timezone and DST information between the universal time epoch and the smallest negative 32-bit time_t.
• bug fix: ENCODE-UNIVERSAL-TIME no longer errors when passed the year 1899 so long as the encoded time is non-negative.
• bug fix: on the x86 platform, SB-ROTATE-BYTE:ROTATE-BYTE returns the correct answer for non-constant rotate amounts when performing an inline 32-bit rotation.
• threads
  • bug fix: RELEASE-FOREGROUND doesn't choke on session lock if there is only one thread in the session
  • bug fix: memory leak for streams created in one thread and written to in another
  • bug fix: lockup when compiled with gcc4
  • bug fix: race that allows the gc to be triggered when gc is inhibited
  • bug fix: one less memory fault in INTERRUPT-THREAD, again
  • bug fix: gc and INTERRUPT-THREAD don't hang when the RT signal queue is full
  • bug fix: finished threads are gc'ed properly
• fixed some bugs revealed by Paul Dietz' test suite:
  • CALL-NEXT-METHOD signals an error (in safe code) when the call has arguments with a different set of applicable methods from the orignal arguments.
  • The type error thrown by MAP now has a correct expected-type cell.
  • DISASSEMBLE now throws a TYPE-ERROR when its argument does not name a compiled function.
  • Three MISC tests where a large bignum was improperly coerced to a float that couldn't represent that bignum during type derivation were fixed.
  • SUBTYPEP can now handle types involving the negation of a list-form FUNCTION type.
  • SUBTYPEP also now handles certain COMPLEX type specifiers such as (COMPLEX (AND RATIO (NOT FIXNUM))).
  • READ-BYTE and WRITE-BYTE no longer take stream designators.

New in version 0.9.3

• New feature: Experimental support for bivalent streams: streams opened with :element-type :default now allow character and binary (unsigned-byte 8) I/O
• Support for the koi8-r external format. (thanks to Ivan Boldyrev)
• Bug fix: OPEN no longer fails when *PRINT-READABLY* is T. (thanks to Zach Beane)
• bug fix: no more highly sporadic "couldn't check whether ~S is readable" when reading a stream and an interrupt hits in the middle of a select system call
• compiler better recognizes complex arrays (reported by Eduardo Muñoz)
• bug fix: out-of-line SB-SYS:FOREIGN-SYMBOL-ADDRESS did not work for variables on SBCL built with linkage-tables. (reported by Luis Oliveira)
• various error reporting improvements.
• optimizations: LOGNOR on fixnums is improved in the MIPS backend. (Thanks to Thiemo Seufer)
• bug fix: nested reader invokations work correctly
• bug fix: it is possible to have simultaneous references to foreign code and foreign data with the same name.
• threads
  • added x86-64 support
  • incompatible change: the threading api now works with thread objects instead of thread ids
  • bug fix: threads are protected from signals and interruption when starting up or going down
  • bug fix: a race where an exiting thread could lose its stack to gc
  • bug fix: don't halt on infinite error in threads if possible
  • fixed numerous gc deadlocks introduced in the pthread merge
  • bug fix: fixed thread safety issues in read and print
  • bug fix: debugger doesn't hang on session lock if interrupted at an inappropriate moment
  • bug fix: run-program is now thread safe(r)
  • bug fix: inner with-recursive-lock no longer releases the mutex
• fixed a bug in (DECODE-UNIVERSAL-TIME 0) (reported by Paul Dietz)
• fixed some bugs revealed by Paul Dietz' test suite:
  • TYPE-ERRORs from signalled by COERCE now have DATUM and EXPECTED-TYPE slots filled.
  • MULTIPLE-VALUE-SETQ always returns the primary value of the values form.
  • MAKE-CONDITION accepts classes as type-designators.
  • COMPILE may never return NIL.
  • ENCODE-UNIVERSAL-TIME now guards against times out of Unix's range before calling Unix time functions

New in version 0.9.2

• numerous signal handling fixes to increase stability
• Support for EUC-JP external format. (thanks to NIIMI Satoshi)
• minor incompatible change: we now correctly canonize default initargs, making them be a list of (INITARG INITFORM INITFUNCTION) as per the MOP, rather than the historical (INITARG INITFUNCTION INITFORM). (reported by Bruno Haible)
• new feature: WITH-COMPILATION-UNIT now accepts a non-standard :SOURCE-PLIST option. See (DOCUMENTATION #'WITH-COMPILATION-UNIT T) for more information.
• TRUENAME and PROBE-FILE now correctly resolve symlinks even if the pathname is a directory pathname.
• SB-SPROF now works (more) reliably on non-GENCGC platforms.
• dynamic space size on PPC has been increased to 768Mb. (thanks to Cyrus Harmon)
• SB-MOP:ENSURE-CLASS-USING-CLASS now accepts a class as the :METACLASS argument in addition to a class name. (reported by Bruno Haible for CMUCL, patch for CMUCL by Gerd Moellmann)
• RESTART-CASE can now be wrapped around CALL-METHOD forms. (reported by Bruno Haible; patch from Gerd Moellmann)
• bug fix: sbcl runtime can now be compiled with gcc4 (thanks to Sascha Wilde)
• bug fix: more cleanups to the floating point exception handling on x86-64 (thanks to James Knight)
• bug fix: the compiler does not try to constant fold calls of COERCE and BIT-* functions when they return freshly constructed objects. (reported by Nikodemus Siivola and Paul Dietz)
• optimization: improved the MIPS versions of generic (in the generic sense) arithmetic routines. (thanks to Thiemo Seufer)
• optimization: direct conversion of (unsigned-byte 32) to floats on the PowerPC platform.
• optimization: structure instances with raw slots now use less memory, and probably show better memory locality. (thanks to David Lichteblau)
• optimization: DYNAMIC-EXTENT declarations for lists and closures are treated as requests for stack allocation on the x86-64, Alpha-32, PPC and SPARC platforms.
• contrib improvement: it's harder to cause SOCKET-CLOSE to close() the wrong file descriptor; implementation of SOCKET-OPEN-P. (thanks to Tony Martinez)
• threads
  • gcing a dead thread can no longer lead to lockups
  • threads block signals until they are set up properly
  • errno is no longer shared by threads
  • interrupt-thread restores the eflags register on x86
  • fixed some lockups due to gc/thread interaction
• fixed some bugs revealed by Paul Dietz' test suite:
  • invalid dotted lists no longer raise a read error when *READ-SUPPRESS* is T
  • signal an error if a symbol that names a declaration is used as the name of a type, or vice versa
  • allow using the (declare (typespec var*)) abbreviation for (declare (type typespec var*)) with all type specifiers
  • circularity detection works properly with PPRINT-LOGICAL-BLOCK
  • always return NIL from PPRINT-POP when OBJECT is NIL
  • don't signal errors when pretty-printing malformed LABELS, FLET or MACROLET forms
  • declarations in a DOLIST body are also in scope for the DOLIST return-form
  • COMPILE-FILE accepts all pathname designators as INPUT-FILE and OUTPUT-FILE
  • the ELEMENT-TYPE keyword argument to WITH-OUTPUT-STREAM is always evaluated

New in version 0.9.1

• fixed cross-compiler leakages that prevented building a 32-bit target with a 64-bit host compiler.
• fixed a bug in CLOSE :ABORT T: no longer attempts to remove files opened with :IF-EXISTS :OVERWRITE.
• fixed bug 281: error for an invalid qualifier in a short-form method combination method is not signalled until the faulty method is called.
• bug fix: iteration variable type inferrer failed to deal with open intervals. (reported by Alan Shields)
• bug fix: dynamically loading (via LOAD-SHARED-OBJECT or similar) "frameworks" on Mac OS X no longer causes an EXC_BAD_ACCESS if two or more runtime options were provided to the sbcl binary.
• compiled code is not steppable if COMPILATION-SPEED >= DEBUG.
• contrib improvement: implement SB-POSIX:MKSTEMP (Yannick Gingras)
• optimization: there's now a fast-path for fixnum arguments in the generic subtraction routines on x86/x86-64. (Thanks to Lutz Euler)
• optimization: the code generated on x86-64 is more compact thanks to not outputting unneccessary prefix bytes. (Thanks to Lutz Euler)
• bug fix: floating-point exception handling now partly works on x86-64. (Thanks to James Knight)
• improvement to the MIPS backend from Thiemo Seufer: C-style 64-bit long long arguments and return values to alien functions are now supported.
• fixed some bugs revealed by Paul Dietz' test suite:
  • the type-error signalled from WARN has a filled-in DATUM slot.
  • the type-error required when a stream is not associated with a file has the stream as its datum.
  • type-errors on single-floats on x86-64 no longer have :INVALID-OBJECT as the datum
  • the type-errors signalled for invalid function names now have a correct expected type
  • (SETF (DOCUMENTATION ... 'STRUCTURE)) no longer signals an error for structures defined with a :TYPE. Documentation strings for typed structures are no longer immediately discarded
  • FILE-STRING-LENGTH and STREAM-EXTERNAL-FORMAT now work on broadcast streams and synonym streams. FILE-LENGTH now also works on broadcast streams.

New in version 0.9.0

• incompatible change: the --noprogrammer option, deprecated since version 0.7.5, has been removed. Please use the equivalent --disable-debugger option instead.
• incompatible change: finalizers and *AFTER-GC-HOOKS* are now run with interrupts enabled.
• incompatible change: support for *BEFORE-GC-HOOKS* (that have been inoperational for a while now) has been completely removed.
• null lexical environments are now printed as #<NULL-LEXENV>, significantly reducing the amount of clutter in typical backtraces.
• documentation on weak pointers, finalization, and after GC hooks has been added to the manual.
• optimization: REPLACE on declared (UNSIGNED-BYTE 8) vectors, as well as other specialized array types, is much faster. SUBSEQ and COPY-SEQ on such arrays have also been sped up.
• optimization: EQL is now more efficient when at least other argument is known to be of type (OR FIXNUM (NOT NUMBER)).
• fixed bug: the runtime is now less vulnerable to changes in the size of the SBCL object on OS X, and virtual memory is reserved for all spaces that need to be at a fixed address.
• fixed bug: finalizers are now thread-safe. (thanks to Gabor Mellis)
• fixed bug: finalizers and after GC hooks that cause consing are now safe.
• fixed bug: compiler error messages and summaries are now printed to *ERROR-OUTPUT*, not *STANDARD-OUTPUT*.
• fixed inference of the upper bound of an iteration variable. (reported by Rajat Datta).
• fixed bug 211e: calling local functions with duplicated constant keyword argument no longer causes a bogus style warning about an unused variable.
• fixed bug 305: INLINE/NOTINLINE declaration no longer causes local ftype declaration to be disregarded. (reported by Dave Roberts)
• fixed bug 373: caused by erronous compilation of references to alien variables in the runtime on ppc/darwin.
• fixed bug 376: CONJUGATE type deriver.
• fixed infinite looping of ALIEN-FUNCALL, compiled with high DEBUG. (reported by Baughn on #lisp)
• a cross-compiler bug on non-x86 platforms has been identified and fixed. (thanks to Bruno Haible)
• improvements to the MIPS runtime code for increased stability. (thanks to Thiemo Seufer)
• increased the maximimum compact environment size to allow purify on images with large amounts of functions. (thanks to Cyrus Harmon)
• partial workaround for bug 135: don't name the function we're calling for hairy cases of EVAL, so as not to accumulate one environment entry per call to EVAL. (reported by Kevin Reid)
• improvements to the x86-64 disassembler. (thanks to Lutz Euler)
• optimization: type testing for non-vector arrays should be faster.
• fixed TRACE :ENCAPSULATE NIL, added support for :ENCAPSULATE NIL on x86-64
• bug fix: setting 31st element of a bit vector to zero did not work on Alpha-32.
• bug fix: redefining a class definition which failed due to a previous accessor / function clash now works (but see BUGS entry #380 for more problems in this area). (thanks to Zach Beane)
• the long form of DEFINE-METHOD-COMBINATION disables method group checking when given a single method group with pattern *. (thanks to Wendall Marvel)
• on x86 compiler supports stack allocation of results of simple calls of MAKE-ARRAY, bound to variables, declared DYNAMIC-EXTENT.
• support for building and running on Mac OS X 10.4 "Tiger" has been added
  • Binaries built on Tiger will not run on 10.2 "Jaguar" currently
• fixed some bugs related to Unicode integration:
  • the restarts for recovering from input and output encoding errors only appear when there is in fact such an error to handle.
• fixed some bugs revealed by Paul Dietz' test suite:
  • MISC.549 and similar: late transformation of unsafe type assertions into derived types caused unexpected code transformations.
  • SCALE-FLOAT type deriver is less wrong.
  • type derivers for EXP, LOG and similar functions compute result types for complex arguments better.
  • (MISC.563) CONJUGATE type deriver works for very restricted complex types.
  • out-of-line type testers for character strings are available.
  • EQUAL compiler transform understands specialness of objects of type BIT-VECTOR.
  • accessing double-floats stored on the stack now works on x86-64.
  • debugger internals could sometimes create invalid lispobjs, resulting in GC crashes.
  • MISC.548: type check weakening can convert required type into optional.
  • initialization forms for bindings are not in scope of free special declarations.

New in version 0.8.21

• incompatible change: thread support for non-NPTL systems has been removed - locking is buggy and unreliable. A threaded SBCL build will now warn at startup and refuse to create new threads, unless futex support is detected in the kernel
• incompatible change: the top level REPL now has only an ABORT restart associated with it, not TOPLEVEL and ABORT as it used to. TOP and TOPLEVEL are now available as debugger commands for returning to the top level.
• incompatible change: forms evaluated in the REPL now use the global optimization policy.
• incompatible change: user- and system-initialization files are no longer processed with LOAD, but by READ and EVAL; hence the global optimization policy, startup package, readtable, etc, can be set by them.
• The .fasl file format number has been incremented because of various incompatible changes.
• internal entry point details and argument counts no longer appear in backtraces unless explicitly requested by setting SB-DEBUG:*SHOW-ENTRY-POINT-DETAILS*.
• built-in and standard functions no longer have names like "top level local call to FOO".
• fixed bug 32: functions defined in non-null lexical environments now have more legible printed representation
• fixed bug 33: functions defined in non-null lexical environemnts are now more amenable to inspection by INSPECT.
• workaround for bug 354: XEPs no longer appear in backtraces unless explicitly requested.
• fixed bug: receiving the signal which results from attempting to write to mprotect()ed memory (SIGSEGV on Linux and some *BSDs, SIGBUS on other *BSDs) on architectures where the C stack is also the Lisp stack (x86 and x86-64) from foreign code no longer leads to debugger confusion or wild instability. (reported by Cheuksan Wang)
• fixed bug: COUNT and EQUAL no longer issue compiler efficiency notes when operating on objects known to be SIMPLE-BIT-VECTORs. (reported by Lutz Euler)
• fixed bug: (TYPEP X '(MEMBER ...)) no longer returns a list in compiled code. (reported by Paul Dietz)
• fixed bug 276b: mutating with MULTIPLE-VALUE-SETQ a binding of a specialized parameter to a method to something that is not TYPEP the specializer is now possible.
• fixed bug: the MAKE-INSTANCE optimization is now correct in the face of package deletion.
• fixed bug: LOAD should bind *LOAD-PATHNAME* to the merged pathname. (reported by David Tolpin on c.l.l)
• contrib improvement: the SB-SIMPLE-STREAMS contrib now defines STRING-SIMPLE-STREAM and FILE-SIMPLE-STREAM as subclasses of STRING-STREAM and FILE-STREAM, respectively.
• contrib improvement: SB-INTROSPECT handles more of SLIME's needs than previously; in addition, its test suite is now run on build. (thanks to Luke Gorrie)
• a more robust x86-64 disassembler. (thanks to Lutz Euler)
• optimization: added a immediate representation for single-floats on x86-64
• fixed some bugs revealed by Paul Dietz' test suite:
  • MISC.564: defined out-of-line version of %ATAN2 on x86.
  • attempting to create a package with a colliding nickname causes correctable errors to be signalled.
  • MISC.572-574: :START1 and :START2 broken for simple-base-strings.
  • several x86-64 backend bugs related to sign-extension of immediate operands.

New in version 0.8.20

• fixed inspection of specialized arrays. (thanks to Simon Alexander)
• fixed disassembly of SHLD and SHRD on x86. (thanks to David Lichteblau)
• fixed loading of multiply forward-referenced layouts. (thanks to Cheuksan Wang)
• fixed bug 7: less verbose COMPILE-FILE output. Additionally, the output is now directed to *STANDARD-OUTPUT* as specified by ANSI. (see COMPILE-FILE documentation for details of :PRINT option)
• fixed bugs 19 and 317: fixed-format floating point printing is more accurate. This also fixes a bug reported by Adam Warner related to the ~@F format directive.
• fixed bug 371: bignum print/read inconsistency. (thanks to Harald Hanche-Olsen)
• fixed bug: SET-SYNTAX-FROM-CHAR correctly shallow-copies a dispatch table if the from-char is a dispatch macro character.
• fixed bug: COUNT and EQUAL on bit vectors with lengths divisible by the wordsize no longer ignore the last word. (reported by Lutz Euler)
• fixed bug in type checking of dynamic-extent variables. (reported by Svein Ove Aas)
• optimization: sequence traversal functions use their freedom to coerce function designators to functions.
• optimization: code with many calls to CLOS methods specialized on CLOS classes has had redundant type checks removed.
• optimization: added declarations to speed up operations that access the internal character database (for example STRING-UPCASE)
• optimization: comparison operations between floats and sufficiently small fixnums no longer create extra rationals
• fixed some bugs related to Unicode integration:
  • portions of multibyte characters at the end of buffers for character-based file input are correctly transferred to the start of the buffer at the next read.
  • COMPILE-FILE now respects any EXTERNAL-FORMAT argument given, passing it through to OPEN.
  • LOAD on source files likewise passes any EXTERNAL-FORMAT argument given to internal calls to OPEN.
  • the built-in comment readers (introduced by character sequences ";" and "#|") are more forgiving to encoding errors; they will STYLE-WARN and then attempt to resync the stream at a character boundary. (thanks to Teemu Kalvas)
• fixed some bugs in the x86-64 port:
  • Negative short int return values from c-calls are sign-extended correctly.
  • The stack is aligned to 16-bytes for c-calls, as required by the ABI. (thanks to Cheuksan Wang)
  • The disassembler understands more x86-64. (thanks to Cheuksan Wang)
  • The regression tests use SB-ALIEN:INT instead of SB-ALIEN:INTEGER for enums. (thanks to Vincent Arkesteijn)
  • Multiple small optimizations and bugfixes for floating point operations.
• fixed some bugs revealed by Paul Dietz' test suite:
  • Space, Tab, Linefeed, Return and Page have the invalid secondary constituent character trait.
  • SET-SYNTAX-FROM-CHAR correctly copies multiple-escape character syntax.
  • WITH-INPUT-FROM-STRING should only update the index place on normal termination.
  • Pretty-printing backquoted forms when *PRINT-CIRCLE* is true works more reliably.
  • Bit-array operations (BIT-AND and similar) worked incorrectly with one-dimensional arrays with fill pointers.
  • TYPE-OF failed on a complex with an integer realpart and a RATIO imagpart.
  • compiler failure during type inference for the code of form (IF (EQL X (THE ...)) ...) (MISC.535).

New in version 0.8.19

• new port: SBCL now works in native 64-bit mode on x86-64/Linux platform. The port supports 61-bit fixnums, large memory spaces and reloading shared object files.
• enhancement: saving cores with foreign code loaded is now supported on ppc/Darwin in addition to the previously supported platforms.
• enhancement: the statistical profiler now walks deeper into the call stack for more meaningful call-graphs and accrued time reports (x86/x86-64 only). It also now reports time spent in foreign functions.
• enhancement: it is now possible to trace most individual methods of a generic function in addition to tracing the generic function itself.
• bug fix: invalid :DEFAULT-INITARGS are detected in compiled calls to MAKE-INSTANCE.
• bug fix: defaulted initargs are passed to INITIALIZE-INSTANCE and SHARED-INITIALIZE methods from compiled calls to MAKE-INSTANCE.
• bug fix: COERCE to (COMPLEX FLOAT) of a complex number no longer produces an error. (thanks to Vincent Arkesteijn)
• bug fix: NAMESTRING on pathnames with :WILD components in their directories works correctly. (thanks to Artem V. Andreev)
• fixed bug 125: compiler preserves identity of closures. (reported by Gabe Garza)
• bug fixed: functions with &REST arguments sometimes failed with "Undefined function" when compiled with (DEBUG 3). (reported by Robert J. Macomber)
• bug fix: overflow during compiling of setting element of a bit vector with constant index and value. (reported by Timmy Douglas)
• build fix: fixed the dependence on *LOAD-PATHNAME* and *COMPILE-FILE-PATHNAME* being absolute pathnames.
• on x86 compiler partially supports stack allocation of dynamic-extent closures.
• GO and RETURN-FROM do not check the extent of their exit points when compiled with SAFETY 0.
• fixed some bugs related to Unicode integration:
  • encoding and decoding errors are now much more robustly handled; it should now be possible to recover even from invalid input or output to the terminal. (thanks to Teemu Kalvas)
  • provided a first cut at implementing STRING-TO-OCTETS and OCTETS-TO-STRING. (thanks to Robert J. Macomber)
  • altered the SB-MD5 contributed module slightly, changing the interface just enough for it to be supportable for builds where lisp characters are not eight bits.
• fixed some bugs revealed by Paul Dietz' test suite:
  • the FORMATTER-generated functions for ~V[ conditionals require the correct number of arguments.
  • READ-FROM-STRING returns the mandated seco