Ticket #2387: from_6_bit_subscript.patch

boost/archive/iterators/base64_from_binary.hpp

@@ -43 +43 @@
             "0123456789"
             "+/";
         assert(t < 64);
-        return lookup_table[t];
+        return lookup_table[static_cast<size_t>(t)];
     }
 };