Fix various small issues with the multiple-value implementation. lisp/ChangeLog addition: 2009-08-31 Aidan Kehoe <kehoea@parhasard.net> * byte-optimize.el (byte-optimize-form-code-walker): Be careful about discarding multiple values when optimising #'prog1 calls. (byte-optimize-or): Preserve any trailing nil, as this is a supported way to explicitly discard multiple values. (byte-optimize-cond-1): Discard multiple values with a singleton followed by no more clauses. * bytecomp.el (progn): (prog1): (prog2): Be careful about discarding multiple values in the byte-hunk handler of these three forms. * bytecomp.el (byte-compile-prog1, byte-compile-prog2): Don't call #'values explicitly, use `(or ,(pop form) nil) instead, since that compiles to bytecode, not a funcall. * bytecomp.el (byte-compile-values): With one non-const argument, byte-compile to `(or ,(second form) nil), not an explicit #'values call. * bytecomp.el (byte-compile-insert-header): Be nicer in the error message to emacs versions that don't understand our bytecode. src/ChangeLog addition: 2009-08-31 Aidan Kehoe <kehoea@parhasard.net> * eval.c (For, Fand): Don't declare val as REGISTER in these functions, for some reason it breaks the non-DEBUG union build. These functions are only called from interpreted code, the performance implication doesn't matter. Thank you Robert Delius Royar! * eval.c (Fmultiple_value_list_internal): Error on too many arguments. tests/ChangeLog addition: 2009-08-31 Aidan Kehoe <kehoea@parhasard.net> * automated/lisp-tests.el (Assert-rounding): Remove an overly-verbose failure message here. Correct a couple of tests which were buggy in themselves. Add three new tests, checking the behaviour of #'or and #'and when passed zero arguments, and a Known-Bug-Expect-Failure call involving letf and values. (The bug predates the C-level multiple-value implementation.)

--- a/lisp/ChangeLog	Wed Sep 02 20:38:14 2009 -0600
+++ b/lisp/ChangeLog	Sun Sep 06 19:36:02 2009 +0100
@@ -1,3 +1,29 @@
+2009-08-31  Aidan Kehoe  <kehoea@parhasard.net>
+
+	* byte-optimize.el (byte-optimize-form-code-walker): 
+	Be careful about discarding multiple values when optimising
+	#'prog1 calls. 
+	(byte-optimize-or): 
+	Preserve any trailing nil, as this is a supported way to
+	explicitly discard multiple values.
+	(byte-optimize-cond-1):
+	Discard multiple values with a singleton followed by no more
+	clauses.
+	* bytecomp.el (progn): 
+	(prog1):
+	(prog2):
+	Be careful about discarding multiple values in the byte-hunk
+	handler of these three forms. 
+	* bytecomp.el (byte-compile-prog1, byte-compile-prog2):
+	Don't call #'values explicitly, use `(or ,(pop form) nil) instead,
+	since that compiles to bytecode, not a funcall.
+	* bytecomp.el (byte-compile-values): 
+	With one non-const argument, byte-compile to `(or ,(second form)
+	nil), not an explicit #'values call.
+	* bytecomp.el (byte-compile-insert-header): 
+	Be nicer in the error message to emacs versions that don't
+	understand our bytecode.
+
 2009-08-27  Aidan Kehoe  <kehoea@parhasard.net>
 
 	* cl.el (bytecomp-load-hook): New.