From 50c1da22df2f499647bc52daab162f2aa0256fbc Mon Sep 17 00:00:00 2001
From: tadf <tadf@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 11 Dec 2008 14:49:54 +0000
Subject: 	* lib/cmath.rb (sqrt): should pass nan or infinity to the
 original 	  method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@20646 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog    | 5 +++++
 lib/cmath.rb | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 1533043dfb..370eed3ff6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec 11 23:48:00 2008  Tadayoshi Funaba  <tadf@dotrb.org>
+
+	* lib/cmath.rb (sqrt): should pass nan or infinity to the original
+	  method.
+
 Thu Dec 11 21:04:04 2008  Kouhei Sutou  <kou@cozmixng.org>
 
 	* lib/rss/maker.rb, lib/rss/maker/0.9.rb, lib/rss/maker/base.rb:
diff --git a/lib/cmath.rb b/lib/cmath.rb
index 00bcc9087f..9705b277b0 100644
--- a/lib/cmath.rb
+++ b/lib/cmath.rb
@@ -57,7 +57,7 @@ module CMath
 
   def sqrt(z)
     if z.real?
-      if z >= 0
+      if z >= 0 || (Float === z && (z.nan? || z.infinite?))
 	sqrt!(z)
       else
 	Complex(0, sqrt!(-z))
-- 
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