From 3e567a2e27e447b5a09291fde136964fc76807d3 Mon Sep 17 00:00:00 2001
From: yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 25 Dec 2008 09:53:31 +0000
Subject: merges r20938 from trunk into ruby_1_9_1. * lib/mathn.rb:
 Math.sqrt(NaN) should be NaN. [ruby-dev:37537]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@21012 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/mathn.rb | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'lib')

diff --git a/lib/mathn.rb b/lib/mathn.rb
index 48cb99f8c..0241f578e 100644
--- a/lib/mathn.rb
+++ b/lib/mathn.rb
@@ -134,6 +134,8 @@ module Math
       else
 	Complex(x, -y)
       end
+    elsif a.respond_to?(:nan?) and a.nan?
+      a
     elsif a >= 0
       rsqrt(a)
     else
-- 
cgit