[boost][range] - Ticket 5556 - is_sorted namespace issue under GCC 4.5

[SVN r72101]

test/Jamfile.v2

@@ -157,5 +157,6 @@ test-suite range :
 	[ range-test string ]
 	[ range-test sub_range ]
 	[ range-test ticket_5544_terminate_irange ]
+	[ range-test ticket_5556_is_sorted_namespace ]
     ;
 

test/ticket_5556_is_sorted_namespace.cpp

@@ -0,0 +1,37 @@
+// Boost.Range library
+//
+//  Copyright Neil Groves 2011. 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)
+//
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+
+// Embarrasingly, the mere inclusion of these headers in this order was
+// enough to trigger the defect. 
+#include <boost/range/algorithm.hpp>
+#include <boost/range/algorithm_ext.hpp>
+
+#include <boost/test/test_tools.hpp>
+#include <boost/test/unit_test.hpp>
+
+namespace boost
+{
+    namespace
+    {
+        void test_ticket_5556() {}
+    }
+}
+
+boost::unit_test::test_suite*
+init_unit_test_suite(int argc, char* argv[])
+{
+    boost::unit_test::test_suite* test
+        = BOOST_TEST_SUITE( "RangeTestSuite.ticket_5556" );
+
+    test->add( BOOST_TEST_CASE( &boost::test_ticket_5556 ) );
+
+    return test;
+}