naruse	2011-06-13 16:41:20 +0900 (Mon, 13 Jun 2011)

  New Revision: 32048

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=32048

  Log:
    Fix: r32043  may raise NameError.

  Modified files:
    trunk/ext/syck/lib/syck/rubytypes.rb

Index: ext/syck/lib/syck/rubytypes.rb
===================================================================
--- ext/syck/lib/syck/rubytypes.rb	(revision 32047)
+++ ext/syck/lib/syck/rubytypes.rb	(revision 32048)
@@ -10,7 +10,7 @@
 class Object
     yaml_as "tag:ruby.yaml.org,2002:object"
     def to_yaml_style; end
-    undef to_yaml_properties
+    undef to_yaml_properties rescue nil
     def to_yaml_properties; instance_variables.sort; end
 	def to_yaml( opts = {} )
 		YAML::quick_emit( self, opts ) do |out|

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