changes in sbcl-2.1.7 relative to sbcl-2.1.6:
* incompatible change: on certain platforms (currently just x86-64),
dynamic-extent arrays specialized on character and numeric types and
created without either :INITIAL-ELEMENT or :INITIAL-CONTENTS will reflect
previous contents of the stack instead of #\null (or 0) in all elements.
* minor incompatible change: SB-SPROF:START-PROFILING no longer silently
does nothing if the clock is already running. It instead stop and restarts
with the newly provided options, and warns.
* minor incompatible change: the system attempts to refer to the supplied
pathname in compiler diagnostics, if relevant, rather than the truename.
* enhancement: new contrib module sb-graph producing graphical
visualizations of Intermediate Representations of SBCL compilation data
structures.
* platform support:
** improved code generation for unary minus in modular contexts on arm64.
** make the disassembler annotations slightly more robust on arm64.
** release space back to the Operating System on Windows.
** improve the test for whether pages need to be committed on Windows.
** fix a bug in the use of the VPCMPEQD opcode on x86-64. (lp#1928516,
thanks to Marco Heisig)
* optimization: the type of (LOOP ... COLLECT ...), and the type of COLLECT
INTO variables, is derived as LIST. (lp#1934577, reported by SATO
shinichi)