From a35c3cf34137c8a58a35d7e543af9cfa9d4725f6 Mon Sep 17 00:00:00 2001
From: akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 1 Aug 2010 00:46:18 +0000
Subject: * class.c (rb_include_module): don't clear the method cache if the  
 included module has no method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28813 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 class.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'class.c')

diff --git a/class.c b/class.c
index 7e2f40b0a3..9ad8ec8539 100644
--- a/class.c
+++ b/class.c
@@ -659,7 +659,8 @@ rb_include_module(VALUE klass, VALUE module)
 	    }
 	}
 	c = RCLASS_SUPER(c) = include_class_new(module, RCLASS_SUPER(c));
-	changed = 1;
+	if (RMODULE_M_TBL(module) && RMODULE_M_TBL(module)->num_entries)
+	    changed = 1;
       skip:
 	module = RCLASS_SUPER(module);
     }
-- 
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