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changes in sbcl-1.0.49 relative to sbcl-1.0.48:
  * minor incompatible change: WITH-LOCKED-HASH-TABLE no longer disables
    interrupts for its body.
  * enhancement: source locations are now available for files loaded as
    source, compile-time-too evaluation, and initialization files.
  * enhancement: WITH-COMPILATION-UNIT :SOURCE-NAMESTRING allows providing
    virtual source-file information, eg. overriding input-file of COMPILE-FILE
    when a temporary file is used for compilation.
  * enhancement: ASDF has been updated to version 2.015.3.
  * enhancement: backtraces involving frames from the default evaluator are
    more readable.
  * enhancement: RUN-PROGRAM works with user-defined binary input and output
    streams.
  * enhancement: more informative compile-time warnings and runtime errors for
    type-errors detected at compile-time.
  * enhancement: deadlock detection for mutexes and spinlocks.
  * enhancement: dynamic-extent for &rest lists stack allocate only their
    spines, not their argumets. While portable code should not rely on this,
    particularly in combination with inlining, it should make dynamic-extent
    easier to use safely.
  * enhancement: SB-POSIX improvements:
    ** WNOHANG and WUNTRACED are exported.
    ** SYSCALL-ERROR now also provides the name of the failing system call.
  * enhancement: --script improvements:
    ** errors on standard input, output, and error streams are handled and
       cause scripts to exit silently, making them easier to use in shell
       pipelines.
    ** backtraces from scripts now go to standard error instead of the
       terminal even if one is available.
    ** --script can be an argument, causing the script to be loaded from
       standard input.
  * enhancement: MAKE-ALIEN-STRING provides an easy way to transport lisp
    strings to foreign memory.
  * enhancement: (SETF GC-LOGFILE) allows logging garbage collections to
    a file, making it easier to understand heap dynamics.
  * optimization: using a &REST argument only in APPLY or VALUES-LIST calls
    allows the compiler to automatically elide rest-list allocation so long as
    the call sites are in functions that the compiler knows cannot escape.
    (lp#504575)
  * optimization: CALL-NEXT-METHOD using explicit arguments is faster,
    especially in safe code when none of the required arguments have changed
    their identities.
  * bug fix: blocking reads from FIFOs created by RUN-PROGRAM were
    uninterruptible, as well as blocking reads from socket streams created
    with for which :SERVE-EVENTS NIL. (regression from 1.0.42.43)
  * bug fix: SET-SYNTAX-FROM-CHAR now removes dispatch-macro character syntax
    from the to-char if the from-char is not a dispatch-macro character.
  * bug fix: references to undefined variables in function calls that are
    optimized away now signal a runtime error. (lp#722734)
  * bug fix: miscompilation of MULTIPLE-VALUE-CALL when asserting derived
    types from a function defined in the same file. (regression from
    1.0.43.57)
  * bug fix: TRULY-THE forms are now macroexpandable and setf-expandable.
    (lp#771673)
  * bug fix: spurious errors during QUIT when standard streams were closed.

changes in sbcl-1.0.48 relative to sbcl-1.0.47:
  * incompatible change: SB!KERNEL:INSTANCE-LAMBDA, deprecated for over five
    years, is now no longer supported.
  * enhancement: read() and write() have been added to SB-POSIX.
  * enhancement: types of DEFSTRUCT constructors are proclaimed more
    accurately, allowing better typechecking of call-sites.
  * enhancement: errors during compile-time-too processing (i.e. EVAL-WHEN)
    are no longer caught. (reverted to pre 1.0.34 behaviour)
  * optimization: slightly faster ISQRT. (lp#713343)
  * bug fix: better support for Solaris /bin/sh in sh-based tests.
  * bug fix: TRACE behaves better when attempting to trace undefined
    functions. (lp#740717)
  * bug fix: missed optimizations for (FUNCALL (LAMBDA ...) ...) in comparison
    to (FUNCALL #'(LAMBDA ...) ...).
  * bug fix: ((LAMBDA ...) ...) forms with invalid argument counts resulted in
    a compile-time error. (lp#720382)
  * bug fix: forms such as (FUNCALL (FUNCTION NAME OOPS) ...) were compiled
    without complaints.
  * bug fix: less verbose source forms for functions from EVAL. (lp#747485)
  * bug fix: sense of SLOT-BOUNDP-USING-CLASS was inverted in a MAKE-INSTANCE
    optimization. (regression from 1.0.45.18/1.0.46.15)
  * bug fix: package locks did not protects against compile-time side-effects
    of DEFUN. (lp#675584)
  * bug fix: --dynamic-space-size argument is validated more carefully.
    (lp#721457)
  * bug fix: memory fault from printing a malformed simple-condition.
    (lp#705690)
  * bug fix: redefining classes so that slot-definition classes change now
    engages the obsolete instance protocol. (lp#766271)
  * bug fix: constant improper lists could break source coverage recording.
    (lp#767959)
  * bug fix: compiling calls to eg. MEMBER with massive constant list arguments
    could exhaust stack.

changes in sbcl-1.0.47 relative to sbcl-1.0.46:
  * bug fix: fix mach port rights leaks in mach exception handling code on
    darwin/x86 and /x86-64. (thanks to Willem Oudshoorn for motivation and the
    initial patch)
  * enhancement: --script muffles style-warnings and compiler notes. (lp#677779)
  * enhancement: redefinition warnings for macros from different files. (lp#434657)
  * enhancement: better MACHINE-VERSION on Darwin x86 and x86-64. (lp#668332)
  * enhancement: (FORMAT "foo" ...) and similar signal a compile-time warning. (lp#327223)
  * enhancement: no more "in: LAMBDA NIL" messages from the compiler for forms
    processed using EVAL -- now the appropriate toplevel form is reported instead.
  * enhancement: more legible style-warnings for inappropriate IGNORE and IGNORABLE
    declarations. (lp#726331)
  * enhancement: :NOT-NULL option has been added to alien C-STRING type to indicate
    that NIL/NULL is excluded from the type.
  * enhancement: SB-INTROSPECT:MAP-ROOT allows mapping over pointers contained in
    arbitrary objects.
  * optimization: SLOT-VALUE &co are faster in the presence of SLOT-VALUE-USING-CLASS
    and its compatriots.
  * optimization: core startup time is reduced by 30% on x86-64. (lp#557357)
  * bug fix: SB-DEBUG:BACKTRACE-AS-LIST guards against potentially leaking
    stack-allocated values out of their dynamic-extent. (lp#310175)
  * bug fix: attempts to use SB-SPROF for wallclock profiling on threaded
    x86-64 builds caused a type-error.
  * bug fix: calling COMPILE with something else than a lambda-expression as the
    second argument reports a more sensible error. (lp#718905)
  * bug fix: invalid combinations of :PREDICATE and :TYPE options in DEFSTRUCT
    are detected. (lp#520607)
  * bug fix: constant keyword argument checking didn't take :ALLOW-OTHER-KEYS
    into account.
  * bug fix: SLOT-BOUNDP information is correct during MAKE-INSTANCE in the
    presence of (SETF SLOT-VALUE-USING-CLASS) and SLOT-BOUNDP-USING-CLASS
    methods. (regression from 1.0.45.18)
  * bug fix: INITIALIZE-INSTANCE :AROUND methods supplying initargs via
    CALL-NEXT-METHOD work correctly. (regression from 1.0.45.19)
  * bug fix: several foreign functions accepting string also accepted NIL and
    consequently caused a memory fault at 0 now signal a type-error instead.
    (lp#721087)
  * bug fix: under rare circumstances, constraint propagation could rewrite a
    variable reference to refer to a variable not in scope, causing an error
    during physical environment analysis when attempting to close over the
    variable. (lp#551227)
  * bug fix: SIMPLE-CONDITION :FORMAT-CONTROL defaults to NIL.

changes in sbcl-1.0.46 relative to sbcl-1.0.45:
  * enhancement: largefile support on Solaris.
  * enhancement: SB-PROFILE:REPORT now supports :LIMIT and :PRINT-NO-CALL-LIST
    arguments (lp#710017)
  * enhancement: SB-PCL:+SLOT-UNBOUND+ is exported, making it possible to
    distinguish unbound instance slots when using STANDARD-INSTANCE-ACCESS
    &co. (lp#718039)
  * optimization: ERROR and CERROR are approximately 5 times faster.
  * optimization: optimized constructors are used for MAKE-INSTANCE of classes
    with applicable non-standard (SETF SLOT-VALUE-USING-CLASS),
    SLOT-BOUNDP-USING-CLASS, and INITIALIZE-INSTANCE :AROUND methods, speeding
    up instance creation in those cases.
  * optimization: arithmetic operations with multiple constant arguments in now
    have them reduced at compile-time. (lp#676414)
  * optimization: determining current character position on string-streams for
    pretty-printing was overly slow.
  * bug fix: local tail calls to DYNAMIC-EXTENT functions can no longer cause
    lifetime analysis to overwrite closed-over variables (lp#681092).
  * bug fix: encoding errors from some multibyte external formats such as EUC-JP
    were not handled correctly (lp#713063).
  * bug fix: printing waitqueue objects without setting *PRINT-CIRCLE* to T is now
    safe (lp#673630).
  * bug fix: Solaris/x86-64 wasn't getting built with lutex support by
    mistake. (lp#667297).
  * bug fix: CONSTANTLY generated functions had bogus lambda-lists. (lp#713626)
  * bug fix: RUN-PROGRAM :PTY option was racy on OpenBSD. (lp#669485)
  * bug fix: UNINTERN takes a symbol, not a symbol designator -- could previously
    unintern the wrong symbol with the same name. (lp#693796)
  * bug fix: COPY-PPRINT-DISPATCH always has access to a pristine table,
    making it possible to restore the initial table if it has been messed up.
    (lp#678409)

changes in sbcl-1.0.45 relative to sbcl-1.0.44:
  * enhancement: ~/ and ~user/ are treated specially in pathnames.
    Refer to documentation for details.
  * enhancement: ASDF has been updated to version 2.010.
  * optimization: mutated closed-over variables that are only accessed by
    DYNAMIC-EXTENT closures (currently only FLET and LABELS functions
    declared to be DYNAMIC-EXTENT) are stored directly in their containing
    stack frame, rather than allocating a VALUE-CELL (lp#586103).
  * optimization: UNWIND-PROTECT cleanup functions are now declared
    DYNAMIC-EXTENT.
  * bug fix: backtracing function with &REST arguments now shows the full
    argument list. (lp#310173)
  * bug fix: return types for functions with complex lambda-lists are now
    derived properly (lp#384892)
  * bug fix: when SPEED > SPACE compiling CONCATENATE 'STRING with constant
    long string arguments slowed the compiler down to a crawl.
  * bug fix: closure VALUE-CELLs are no longer stack-allocated (lp#308934).
  * bug fix: non-standard MAKE-METHOD-LAMBDA methods could break RETURN-FROM
    in the DEFMETHOD body.
  * bug fix: #<SB-C::DEFINED-FUN ...> should no longer appear in compiler
    messages, being instead replaced with the corresponding function name.
  * bug fix: don't derive overly complex unions of numeric types for arithmetic
    operators. (lp#309448)

changes in sbcl-1.0.44 relative to sbcl-1.0.43:
  * enhancement: RUN-PROGRAM accepts :EXTERNAL-FORMAT argument to select the
    external-format for its :INPUT, :OUTPUT, AND :ERROR :STREAMs.
  * enhancement: ALLOCATION-INFORMATION also provides the page the object
    resides on.
  * enhancement: default dynamic-space size can be configured at build-time
    without touching source, using the --dynamic-space-size argument to make.sh.
  * enhancement: DESCRIBE recognizes symbols naming optimization policy
    qualities, and mentions ALWAYS-BOUND declarations.
  * enhancement: ATOMIC-INCF now supports AREF of (SIMPLE-ARRAY SB-EXT:WORD (*))
    as a place.
  * enhancement: ASDF has been updated to 2.009.
  * enhancement: the system detects known type-erros in calls better,
    signalling a full warning about violated proclaimed FTYPEs and violations
    of derived FTYPEs within the same file, including self-calls.
  * enhancement: new function: SB-EXT:DELETE-DIRECTORY is now provided.
  * optimization: constant-folding exploits numeric and character types, in
    addition member types.
  * optimization: numeric, character and member types that are inhabited by
    exactly one value are tested with EQL.
  * optimization: more conditional branches are eliminated during IR1.
    Branches are simplified before performing if/if-conversion, and simple
    equivalent branches (that only read the same constant or variable) are
    merged.
  * improvements to the Windows port:
    ** change: canonical unparsing form for pathname namestrings now uses / as
       directory separator. NATIVE-NAMESTRING still uses \ as the separator.
    ** bug fix: stackoverwriting due to incorrect usage of PeekConsoleInput
       on Windows. (thanks to Kalyanov Dmitry)
    ** bug fix: build now works on cygwin with GCC 4.x installed. (thanks to
       Kalyanov Dmitry)
    ** bug fix: run-sbcl.sh now works on Cygwin. (thanks to Kalyanov Dmitry)
  * bug fix: compiler failed to derive the result-type of MAKE-ARRAY as
    (AND VECTOR (NOT SIMPLE-ARRAY)) when appropriate. (lp#309130)
  * bug fix: (THE (VALUES ...)) in LOAD-TIME-VALUE caused a compiler-error.
    (lp#646796)
  * bug fix: interrupts arriving during CL:OPEN caused an error.
  * bug fix: overeager character buffering could cause input to block
    spuriously when reading from a pipe (lp#643686)
  * bug fix: more efficient timer expiry should avoid starvation on systems
    where number of SIGALRMs per second is restricted. (lp#375515)
  * bug fix: non-unicode builds no longer fail (broken since 1.0.36.15).
  * bug fix: compile-times no longer scale linearly with the size of
    quoted lists in source-code. (lp#654289)
  * bug fix: better errors for unknown external-formats in OPEN. (lp#561974)
  * bug fix: DEBUG>SPEED no longer degrades ALIEN-FUNCALL performance quite
    so badly. (lp#654485)
  * bug fix: SB-INTROSPECT:FIND-DEFINITION-SOURCES-BY-NAME no longer signals
    an error for eg. STRUCTURE. (lp#458015)
  * bug fix: LOOP WITH NIL = ... signalled an unused variable style-warning.
    (lp#613871, thanks to Roman Marynchak)
  * bug fix: more reliable &REST list type derivation. (lp#655203)
  * bug fix: PPRINT-LOGICAL-BLOCK multiply-evaluated :PER-LINE-PREFIX,
    and issued pointles code-deletion notes for it, :PREFIX, and :SUFFIX.
  * bug fix: the compiler didn't utilize the proclaimed ftype for functions
    also declared NOTINLINE. (lp#655581)
  * bug fix: the compiler could attempt to emit constant left shifts of
    greater value than n-word-bits. (lp#309063)
  * bug fix: (SETF SYMBOL-FUNCTION) and (SETF FDEFINITION) clear derived
    type information for the function being set. (lp#659220)
  * bug fix: the system used to signal bogus STYLE-WARNINGs when functions
    containing self-calls were recompiled with a new signature, and failed
    to warn when a self-call using the old signature was left in. (lp#655126)
  * bug fix: incorrect FILE-POSITION on streams opened using :EXTERNAL-FORMAT
    :DEFAULT when the default external had character size other than 8 bits.
    (lp#657183)
  * bug fix: derived types of functions in the same file were implicitly
    trusted, leading to potential heap corruption when those function were
    defined incompatibly. (lp#657499)
  * bug fix: existing ASDF source registries are ignored when building
    contribs (lp#659105)
  * bug fix: short-form DEFSETF checks that the second argument is a symbol
    (lp#655824, thanks to Roman Marynchak)
  * bug fix: (SETF MACRO-FUNCTION) clobbered macro-definitions before
    package-lock violation was detected. (lp#660752)
  * bug fix: the system can store different docstrings for a single function
    under different names. (lp#661631, regression from 1.0.29.24)
  * bug fix: source-locations of DEFGENERIC forms weren't getting recorded
    properly. (lp#384801)
  * bug fix: (COERCE X '(SIMPLE-VECTOR 5)) and similar coercions to vectors
    of specified length could confuse the type derivation in unsafe code.
    (lp#655872)
  * bug fix: SB-POSIX:FORK now signals an error if an attempt to
    fork with multiple Lisp threads running is made on every platform,
    not just Darwin. (lp#451111)
  * bug fix: SB-BSD-SOCKETS and SB-SIMPLE-STREAMS could leave stale finalizers
    around when core was saved, which could cause undefined behaviour when the
    core was reified.
  * bug fix: Allow UNTRACE of functions that are no longer defined
    (lp#667657, thanks to Attila Lendvai)
  * bug fix: MAKE-ARRAY calls with invalid keyword argument lists now signal a
    compile-time warning (lp#664373, thanks to Stas Boukarev)