structure.rb in structure-0.28.0 vs structure.rb in structure-0.28.1

@@ -12,9 +12,10 @@
   def attribute_names
     self.class.attribute_names
   end
 
   def ==(other)
+    return false unless other.respond_to?(:attributes)
     attributes == other.attributes
   end
 
   def inspect
     class_name = self.class.name || self.class.to_s.gsub(/[^\w:]/, '')