From 95911166f3056af12529faf6d52d68b59a282149 Mon Sep 17 00:00:00 2001
From: Wojciech Piekutowski <wojciech@piekutowski.net>
Date: Sun, 20 Feb 2011 17:01:57 +0100
Subject: [PATCH] Avoid using instance_variable_get on objects of other class

---
 lib/bson/types/object_id.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/bson/types/object_id.rb b/lib/bson/types/object_id.rb
index fcb0e3a..5d72b72 100644
--- a/lib/bson/types/object_id.rb
+++ b/lib/bson/types/object_id.rb
@@ -84,9 +84,9 @@ module BSON
 
     # Check equality of this object id with another.
     #
-    # @param [Mongo::ObjectId] object_id
+    # @param [BSON::ObjectId] object_id
     def eql?(object_id)
-      @data == object_id.instance_variable_get("@data")
+      object_id.kind_of?(BSON::ObjectId) and self.data == object_id.data
     end
     alias_method :==, :eql?