--- slot_call_iterator.hpp	2015-07-08 13:07:07.409112605 -0700
+++ boost_1_58_0/boost/signals2/detail/slot_call_iterator.hpp	2015-07-08 13:03:20.439015270 -0700
@@ -84,7 +84,7 @@
             catch(expired_slot &)
             {
               (*iter)->disconnect();
-              boost::throw_exception(expired_slot());
+              throw;
             }
           }
           return cache->result.get();