sbcl-2.6.5 released

Dear all,

SBCL 2.6.5 is now released!  Notable changes in this release are
summarized below.  As ever, any and all feedback welcome.

Christophe

changes in sbcl-2.6.5 relative to sbcl-2.6.4:
  * minor incompatible change: the condition signalled when an accessed slot
    is missing from an object is no longer a TYPE-ERROR.
  * minor incompatible change: the condition signalled when accessing an
    uninitialized structure slot is no longer a TYPE-ERROR.
  * minor incompatible change: the implementations of standardized functions
    treating lists as sets, such as INTERSECTION and UNION, take more
    advantage of the freedom to return the elements of the result in any
    order.
  * platform support:
    ** add low-level support for floating point state manipulation on
       PPC64/FreeBSD.  (thanks to Piotr Kubaj)
    ** improve the software emulation of displaced instructions on ARM64.
    ** restore building the system using the musl C library.  (lp#2153432,
       reported by Tom Gillespie)
    ** fix some SB-SIMD shifting instructions on AVX2.  (lp#2152791, reported
       by Willem Broekema)
  * enhancement: definition sources for alien callbacks are now findable by
    name in SB-INTROSPECT.
  * bug fix: the SYMBOL restart for finding packages now actually performs a
    non-local exit.  (lp#2153092, reported by Zach Shaftel)
  * bug fix: TYPEP on large disjoint numeric union types compiles faster using
    fewer resources.  (lp#2151818, reported by James McDonald)
  * bug fix: strings of arbitrary size with fill-pointer set to 1 are
    character designators.  (reported by _death)
  * bug fix: the KEEP-OLD restart established by ADD-PACKAGE-LOCAL-NICKNAME
    keeps the old nickname instead of going ahead with the change (and the
    restart report function no longer returns from ADD-PACKAGE-LOCAL-NICKNAME).
  * bug fix: when EXPORT results in a conflict between symbols exported by
    different used packages, the TAKE-NEW restart now shadowing-imports the
    new symbol instead of doing nothing and leaving the package in an
    inconsistent state.
  * bug fix: the SB-EVAL interpreter checks program syntax more thoroughly.
  * bug fix: compiler cross-reference data is decoded correctly for a
    functional with more than one entry for a given name.
  * bug fix: TYPE-ERRORs signalled by SBCL are more likely to have a DATUM
    that is not of the condition's EXPECTED-TYPE.
  * bug fix: the code walker no longer uses the stack to walk PROGN bodies.
  * optimization: in various situations, INTERSECTION and UNION will use
    hash-tables to perform the operation more quickly.