changes in sbcl-2.3.6 relative to sbcl-2.3.5:
* platform support:
** restore building contribs on riscv; (lp#2002930)
** shorter constant-loading sequences on riscv;
** on OpenBSD, map the stack without executable permission (thanks to
Sébastien Marie)
** Restore OpenBSD/arm64 for OpenBSD 7.3 (lp#2024003, reported by Robert
Palm)
* bug fix: AREF on multidimensional arrays with the wrong number of indices
now signals an error. (lp#2022327, reported by EU)
* bug fix: the nature of NIL as both STRING and SEQUENCE is correctly handled
in the compiler's handling of string functions. (lp#2023118, reported by
Patrick Poitras)
* bug fix: the sb-bsd-sockets tests no longer fail on systems configured
without IPv6. (reported by Will Senn)
* bug fix: the compiler no longer transforms into incompletely-known functions
(lp#1824351)
* optimization: better (the word-sized-type (ASH word-sized word-sized))
when the result can overflow. For arm64 and x86-64.
* optimization: better unoptimized calls to CEILING, FLOOR.
* optimization: functions that involve coercing floats now cons less.
For arm64 and x86-64.
* optimization: array displacement to simple arrays is slightly faster.
(reported by Shubhamkar Ayare)