From: yamaoka <yamaoka>
Date: Tue, 4 Nov 2003 04:07:24 +0000 (+0000)
Subject: Synch to Gnus 200311040404.
X-Git-Url: http://git.chise.org/gitweb/?a=commitdiff_plain;h=14387fcd913c81d79f3da77353854c0ed2ab3f87;p=elisp%2Fgnus.git-

Synch to Gnus 200311040404.
---

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 66a0623..9f91ea3 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2003-11-04  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+	* gnus-score.el (gnus-decay-score): Protect against arithmetic
+	errors.  Tiny patch from Norbert Koch <viteno@xemacs.org>.
+
 2003-10-31  Teodor Zlatanov  <tzz@lifelogs.com>
 
 	* spam.el
diff --git a/lisp/gnus-score.el b/lisp/gnus-score.el
index ce255e8..bf5de64 100644
--- a/lisp/gnus-score.el
+++ b/lisp/gnus-score.el
@@ -2953,13 +2953,15 @@ If ADAPT, return the home adaptive file instead."
 
 (defun gnus-decay-score (score)
   "Decay SCORE according to `gnus-score-decay-constant' and `gnus-score-decay-scale'."
-  (floor
-   (- score
-      (* (if (< score 0) -1 1)
-	 (min (abs score)
-	      (max gnus-score-decay-constant
-		   (* (abs score)
-		      gnus-score-decay-scale)))))))
+  (condition-case nil
+      (floor
+       (- score
+	  (* (if (< score 0) -1 1)
+	     (min (abs score)
+		  (max gnus-score-decay-constant
+		       (* (abs score)
+			  gnus-score-decay-scale))))))
+    (arith-error (lsh -1 -1))))
 
 (defun gnus-decay-scores (alist day)
   "Decay non-permanent scores in ALIST."