[Sbcl-announce] sbcl-2.5.10 released

[Christophe R. <cs...@ca...>]

Dear all,

SBCL 2.5.10 is now available from the usual places.  The most pertinent
user-visible changes in this release are summarized below; you might
also wish to know that we have had sporadic reports of garbage
collection instability during the freeze periods -- nothing that was
apparently systematic or reproducible, but you may wish to exercise more
than the usual amount of caution when upgrading.

Christophe

changes in sbcl-2.5.10 relative to sbcl-2.5.9:
  * platform support:
    ** handling of "./" and "../" in pathname functions on Windows is improved.
       (lp#2125908, reported by khbit)
    ** use x29 for the control frame pointer on arm64, improving backtrace
       tooling.
    ** provide a plugin to lldb to display backtraces (contrib/lldb_bt.py).
    ** an experimental option for performing GC without interrupting and
       stopping foreign function calls. Enabled via --with-nonstop-foreign-call
       (for arm64, x86-64 (outside of Windows, where that's already the case.))
  * bug fix: some interactions between TWO-WAY-STREAM (and ECHO-STREAM) and
    user-defined streams have been cleaned up.
  * bug fix: the SB-COVER contributed module can now annotate source files
    containing COMPLEX literals.  (A number of other more minor cosmetic
    issues have also been fixed).
  * bug fix: compiler crash from reoptimizing with some stale type information.
    (lp#2125944)
  * optimization: SLOT-VALUE calls with known slot-name on values which are of
    type (OR NULL <STRUCT>) are transformed to a null check and a structure
    access.
  * optimization: the compiler will apply constraints to the result of calling
    RANDOM.  (lp#2126978, thanks to Vasily Postnicov)
  * optimization: the compiler will perform type derivation on CL:APPLY called
    with a known function.
  * optimization: fusion of type checking and move of 64-bit integers is
    enabled on arm64 and x86-64.
  * optimization: allocation fusion for (PUSH (CONS A B) LIST) on x86-64.
  * optimization: improvements of type derivation for float rounding operations.
  * optimization: constant folding when one of the arguments is
    (if v constant1 constant2)