changes in sbcl-1.2.12 relative to sbcl-1.2.11:
* minor incompatible change: the SB-C::*POLICY* variable is no longer
a list. Code which manipulated it as such (including but not limited
to non-bundled releases of ASDF) will need to be revised.
* enhancement: The input stream for COMPILE-FILE implements
STREAM-LINE-COLUMN.
* enhancement: EVAL errors that occur by way of LOAD report the starting
line and column number of the erring toplevel form. (lp#565247)
* optimization: better MAP and MAP-INTO on known vector result types.
* bug fix: Read/modify/write macros accessing a place which is a
composition of CAR+CDR operations, such as (SHIFTF (CADR X) (ELT V 0)),
do not access subforms more than once. (lp#1450968)
* bug fix: short form of DEFSETF no longer allows trailing junk.
* bug fix: DEFINE-MODIFY-MACRO respects the provisions of CLHS 5.1.3
regarding argument evaluation order. (lp#1452539)
* bug fix: POP works as specified in CLHS if the setter for its
argument has a side-effect on the existing CAR value. (lp#1454021)
* bug fix: Reading "#()" with a positive numeric argument signals a
reader error. As specified, reading "#1()" has undefined consequences,
so correct portable code should be indifferent to this. (lp#1252100)
* bug fix: Malformed reader conditionals such as "(#-no-such-feature)"
and "(#+sbcl)" no longer parse as NIL. (lp#1454400)