From 537d0cab1dadb52c738d9e688147bb66c88d9164 Mon Sep 17 00:00:00 2001
From: mame <mame@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 22 Jul 2010 12:31:27 +0000
Subject: [PATCH] merges r28698 from trunk into ruby_1_9_2. -- * lib/cmath.rb
 (CMath#cbrt): cbrt should accept a negative real   numbers. 
 [ruby-core:31234]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@28718 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 b1cfa903cc..7803c5edcf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Jul 21 12:39:15 2010  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* lib/cmath.rb (CMath#cbrt): cbrt should accept a negative real
+	  numbers.  [ruby-core:31234]
+
 Thu Jul 15 21:43:35 2010  Yusuke Endoh  <mame@tsg.ne.jp>
 
 	* numeric.c (fix_divide): must not use rb_rational_new1 for coercion
diff --git a/lib/cmath.rb b/lib/cmath.rb
index b23dac239c..976f269299 100644
--- a/lib/cmath.rb
+++ b/lib/cmath.rb
@@ -85,7 +85,7 @@ module CMath
   end
 
   def cbrt(z)
-    if z.real? and z >= 0
+    if z.real?
       cbrt!(z)
     else
       Complex(z) ** (1.0/3)