changes in sbcl-2.4.6 relative to sbcl-2.4.5:
* enhancement: name conflicts resulting from colliding symbols in IMPORT and
USE-PACKAGE are resolved once for each name, rather than between pairwise
colliding symbols.
* enhancement: calls to structure constructors with type mismatches in
default initforms cause compile-time warnings.
* platform support:
** fix constant-folding of %log1p and %log2 on 32-bit x86.
** fix the encoding of popcntd on ppc64
* bug fix: EXPORT could be tricked into exporting two distinct symbols of
the same name from the same package.
* bug fix: two-argument calls to LOG with arguments of different precision
do not lose accuracy through insufficiently-precise intermediate values.
* bug fix: :NEWLINE options in *DEFAULT-EXTERNAL-FORMAT* are respected when
opening files. (reported by Marco Antoniotti)
* bug fix: extend type declarations for the iteration variable of DOLIST
with NULL during the evaluation of the result clause. (lp#942237)
* bug fix: #\uE0 (LATIN CAPITAL LETTER A WITH GRAVE) was incorrectly not
downcased with STRING-DOWNCASE. (lp#2067841, reported by Matt Kaufmann)
* bug fix: backquoted lists as arguments to MAKE-ARRAY were miscompiled.
(lp#2069345, reported by Dan Bothell)
* bug fix: resolve the circularity between the type system and the CLOS
metaobject protocol more robustly. (lp#2069502, reported by Jan Moringen)
* bug fix: misplaced tilde in a logical pathname error message.
(lp#2069995, thanks to Marco Heisig)
* optimization: various speedups to UTF-8 based external format streams and
other stream routines.