* ext/psych/lib/psych/visitors/to_ruby.rb (resolve_klass): fix the

exception message when attempting to load an unknown class.  Thanks
  nobu! [ruby-dev:41399]

* test/psych/test_psych.rb: test for the exception message

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28361 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/psych/lib/psych/visitors/to_ruby.rb

@@ -246,13 +246,13 @@ module Psych
 
         begin
           path2class(name)
-        rescue ArgumentError => ex
-          name    = "Struct::#{name}"
+        rescue ArgumentError, NameError => ex
           unless retried
-            retried = true
+            name    = "Struct::#{name}"
+            retried = ex
             retry
           end
-          raise ex
+          raise retried
         end
       end
     end