From b68bf40ecc611a75f3b204fada4471e9af92ce40 Mon Sep 17 00:00:00 2001
From: Aaron Patterson <aaron.patterson@gmail.com>
Date: Wed, 1 Dec 2010 09:11:30 -0800
Subject: make sure we raise type errors with unknown classes

---
 lib/arel/visitors/visitor.rb | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lib/arel/visitors')

diff --git a/lib/arel/visitors/visitor.rb b/lib/arel/visitors/visitor.rb
index 8cea42028e..055acf9765 100644
--- a/lib/arel/visitors/visitor.rb
+++ b/lib/arel/visitors/visitor.rb
@@ -18,6 +18,7 @@ module Arel
         superklass = object.class.ancestors.find { |klass|
           respond_to?(DISPATCH[klass], true)
         }
+        raise(TypeError, "Cannot visit #{object.class}") unless superklass
         DISPATCH[object.class] = DISPATCH[superklass]
         retry
       end
-- 
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