changes in sbcl-1.3.15 relative to sbcl-1.3.14:

  * minor incompatible change: the reader will when feasible create
    new symbols using a BASE-STRING for the print name.  Additionally,
    string literals can favor the base-string type if desired, though
    the default is to always return UTF-32 strings for compatibility.
    A preference for base-string does not disable reading Unicode.
    The choice is controlled via (SETF READTABLE-BASE-CHAR-PREFERENCE).
    If Unicode was disabled at build time, this setting does nothing.
  * enhancement: SBCL generates more debug information by default.
  * enhancement: type errors provide context information, such as which
    variable is being bound, which slot of which structure is being set.
  * enhancement: if #+immobile-symbols is in build-time *FEATURES* (not
    enabled by default), then symbols will never be moved in memory
    except by SAVE-LISP-AND-DIE. Immobility has helpful implications for
    code generation as well as interaction with foreign routines.
    This feature can only be enabled if #+immobile-space is enabled.
  * enhancement: undefined function errors can be restarted on x86-64, to
    either retry calling the function again or call a user supplied function.
  * enhancement: sb-ext:restrict-compiler-policy accepts an upper bound in
    addition to a lower bound.
  * enhancement: #+immobile-code improves the speed of function calling.
    Some delay may be noticed when redefining an existing function
    from a saved core file however.
  * defaults change: sb-ext:*disassemble-annotate* default to NIL, due to its
    poor reliability.
  * new feature: SB-LINKABLE-RUNTIME, allowing linking with extra object
    files to help with delivery of executables.  (Thanks to François-René
    Rideau)
  * bug fix: data race in GENTEMP fixed - it can no longer return the
    same interned symbol to multiple threads if called concurrently
  * bug fix: interrupting LOADing of FASLs does not leave functions without
    source locations. (lp#540276)
  * bug fix: DYNAMIC-EXTENT-declared results of NOTINLINE local functions were
    treated as if they were actually stack allocated (lp#1659964)
  * bug fix: correctly handle the case of a non-local exit within a function
    terminating the extent of dynamic-extent, dynamic-bound variables in the
    presence of multiple-values (lp#1655011)
  * bug fix: handling of SB-SYS:WITH-PINNED-OBJECTS in the interpreters (both
    sb-eval and sb-fasteval) now actually pins objects on gencgc.
  * bug fix: AVX registers are preserved during exceptions on x86-64 macOS.
  * bug fix: (directory "SOMETHING/*/**/MORE") is no longer equivalent to
    (directory "SOMETHING/**/MORE")
  * bug fix: better console IO on Windows (lp#1660906)

changes in sbcl-1.3.14 relative to sbcl-1.3.13:

  * minor incompatible change: the SB-PCL walker no longer recognizes
    macros expanding into a DECLARE expression. This is not a language change,
    since ANSI forbids such usage (X3J13 issue DECLARE-MACROS:FLUSH).
  * enhancement: for several macros such as MULTIPLE-VALUE-{BIND,SETQ}, COND,
    DO{,*,LIST}, {RESTART,HANDLER}-{BIND,CASE}, *CASE, conditions signaled
    during macroexpansion point to the form that caused the problem more
    accurately.
  * enhancement: the "--noinform" command-line option inhibits output from
    save-lisp-and-die in addition to removing the startup banner.
  * bug fix: PROCESS-KILL failed to return errno if the system call failed
  * optimization: slightly more comprehensive treatment of the keyword
    arguments to MAKE-ARRAY in compiler transformations.

changes in sbcl-1.3.13 relative to sbcl-1.3.12:

  * enhancement: SET triggers package locks on undefined variables.
    (lp#1645152)
  * enhancement: new Windows specific option to run-program, :escape-arguments
    (lp#1503496)
  * enhancement: recompiling a MAKE-INSTANCE form with an initarg :INITARG
    CONSTANT where CONSTANT names a constant variable picks up the new value
    of CONSTANT in case it has been redefined. (lp#1644944)
  * optimization: faster TYPEP on undefined at compile-time types and upcoming
    class definitions. (lp#1082967)
  * optimization: memory consumption of each STANDARD-OBJECT instance is
    reduced by 2 words if the compact-instance-header feature is enabled.
  * optimization: CONDITION instances are quicker to allocate.
  * optimization: unoptimized calls to FILL on specialized vectors are now
    just as fast as T vectors.
  * bug fix: get-timezone returns corret DST on 64-bit Windows. (lp#1641058)
  * bug fix: cross reference information in fasls is no longer incompatible
    between different cores (lp#1648186)

changes in sbcl-1.3.12 relative to sbcl-1.3.11:

  * enhancement: on x86-64, compiled functions loaded from fasl files
    can not be moved, but can be freed, by GC. Additionally, COMPILE will
    produce immobile code if SB-C::*COMPILE-TO-MEMORY-SPACE* is set to
    :IMMOBILE. (Caution: the flag is experimental and subject to change.)
    The benefits are better physical separation of code from data,
    and potentially easier examination of live images by external tools.
  * enhancement: the docstring for SAVE-LISP-AND-DIE has been amended to
    say that the :ROOT-STRUCTURES parameter is not meaningless on gencgc,
    depending on the platform.
  * bug fix: calling a named function (e.g. a DEFUN) concurrently with
    redefining that same function could lead to execution of random bytes.
  * bug fix: yes-or-no-p accepts formatter functions (lp#1639490)
  * bug fix: better handling of exceptions on macOS.

changes in sbcl-1.3.11 relative to sbcl-1.3.10:

  * minor incompatible change: SB-EXT:*INTEXP-MAXIMUM-EXPONENT* is removed.
  * enhancement: TRACE ... :REPORT {TRACE,NIL} now work as advertised in the
    documentation string (based on patch by Patrick Stein)
  * enhancement: support unboxed signed-word structure slots on x86, x86-64
    and ARM64. (lp#377616)
  * optimization: faster logical bit-array operations on multidimensional
    arrays.
  * optimization: better GC performance in the presence of many threads.
    (patch by Ilya Perminov, lp#1339924)
  * optimization: multiple-value-call is optimized with multiple argument
    forms, not just one. (lp#753803)
  * bug fix: MAKE-ALIEN-STRING returns the number of allocated bytes as a
    second value as advertised (reported by Johann 'Myrkraverk' Oskarsson)
  * bug fix: when TO-READTABLE is supplied to COPY-READTABLE, it will
    contain only the macros in FROM-READTABLE and no others. (lp#1631506)
  * enhancement: gencgc has been modified for x86-64 on Linux and macOS
    to a support mark-and-sweep as well as the traditional copying strategy.
    It is conceivable that some applications might be adversely affected.
    Please see ':immobile-space' in 'base-target-features.lisp-expr'
    for further details, and possible reasons to disable this feature.
  * enhancement: x86-64 supports shrinking the fixed overhead in a structure
    from 2 words to 1 word, reducing memory consumption in applications
    which create many small structures.

changes in sbcl-1.3.10 relative to sbcl-1.3.9:

  * enhancement: more compact low-level error signaling code
  * enhancement: more compact encoding of cross-reference information
  * optimization: faster out of line fixnum-float comparisons.
  * optimization: filling a known simple-vector with a constant value
    is about as fast in unoptimized code as in code compiled with (SPEED 3),
    and the x86-64 implementation is able to use SSE instructions.
  * bug fix: correctly handle the case of a non-local exit within a function
    terminating the extent of dynamic-extent functions and variables in the
    presence of multiple-values (lp#1563127)
  * bug fix: restore builds on the latest OSX with the latest Xcode
    (lp#1470996)

changes in sbcl-1.3.9 relative to sbcl-1.3.8:

  * minor incompatible change: NAMESTRING prefers to return a BASE-STRING
    instead of (ARRAY CHARACTER (*)) when possible.
  * enhancement: cached make-instance/allocate-instance constructors can now
    get garbage collected.
  * optimization: better performance for some unoptimized operations on
    complex numbers.
  * bug fix: using the options :LOCAL-NICKNAMES and :LOCK in the same
    DEFPACKAGE form no longer signals a bogus error

changes in sbcl-1.3.8 relative to sbcl-1.3.7:

  * minor incompatible change: the system now understands that the CONDITION
    type is disjoint with many other system types.
  * minor incompatible change: argument types in condition report functions
    are now declared (in combination with the above change, this can result in
    early detection of erroneous code).
  * enhancement: simple arrays of any rank can be stack-allocated
    on platforms supporting stack allocation of vectors.
  * optimization: improved type derivation for FIND, POSITION, COUNT, SEARCH,
    MISMATCH and other array and sequence functions.
  * optimization: ALLOCATE-INSTANCE is now as fast as MAKE-INSTANCE.
  * optimization: more efficient CHANGE-CLASS.
  * bug fix: versions of getresuid() and getresgid() in SB-POSIX no longer
    cause memory faults, and should work properly (lp#1603806, reported by
    Kieran Grant)
  * bug fix: handle ENOENT from getprotobyname() (lp#1596043, reported by
    Stephen Hassard)

changes in sbcl-1.3.7 relative to sbcl-1.3.6:

  * bug fix: preserve the name of the destructive function for the destroyed
    constant and important result warnings, even when declared NOTINLINE.
  * optimization: faster operations on list-sets.
  * optimization: better type derivation of set functions.
    (lp#1592152)
  * optimization: load-time TLS-INDEX assignment, and other
    microoptimizations, on x86.
  * optimizations in:
    ** APPEND;
    ** ECASE/ETYPECASE;
    ** ARRAY-DIMENSIONS;
    ** ARRAY-TOTAL-SIZE;
    ** REMOVE, REMOVE-DUPLICATES, DELETE and DELETE-DUPLICATES on lists.

changes in sbcl-1.3.6 relative to sbcl-1.3.5:

  * bug fix: do not insert conditional newlines in print-unreadable-object
    (lp#1398290). This reverses a change made in lp#488979 which reversed
    a fix advertised in release 0.8.14 to pass the GCL ANSI Test Suite.
  * bug fix: constant negative rotations of 32-bit quantites are compiled
    correctly on x86-64 and arm.  (lp#1586614, reported by Guillaume Le
    Vaillant)