Ticket #9401: nonblocking.patch

boost/mpi/nonblocking.hpp

@@ -60 +60 @@
   while (true) {
     // Check if we have found a completed request. If so, return it.
     if (current->m_requests[0] != MPI_REQUEST_NULL &&
-        current->m_requests[1] != MPI_REQUEST_NULL &&
-        optional<status> result = current->test())
-      return std::make_pair(*result, current);
+        current->m_requests[1] != MPI_REQUEST_NULL)
+      if (optional<status> result = current->test())
+        return std::make_pair(*result, current);
 
     // Check if this request (and all others before it) are "trivial"
     // requests, e.g., they can be represented with a single