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diff --git a/src/boost/libs/optional/test/optional_test_fail2.cpp b/src/boost/libs/optional/test/optional_test_fail2.cpp
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+// Copyright (C) 2003, Fernando Luis Cacciola Carballal.
+//
+// Use, modification, and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/lib/optional for documentation.
+//
+// You are welcome to contact the author at:
+// fernando_cacciola@hotmail.com
+//
+#include "boost/optional.hpp"
+
+//
+// THIS TEST SHOULD FAIL TO COMPILE
+//
+void test_no_implicit_conversion()
+{
+ boost::optional<int> opt(1) ;
+
+ // You can compare against 0 or against another optional<>,
+ // but not against another value
+ if ( opt == 1 ) ;
+}
+
+