Ticket #7651: at_impl.hpp.patch

at_impl.hpp

@@ -35 +35 @@
                 static type
                 call(Sequence& seq)
                 {
+                    BOOST_STATIC_ASSERT(((size_t)N::value < (size_t)Sequence::static_size));
                     return seq[N::value];
                 }
             };