X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/befbbbe1fbb31663a8f91e24ce12df271cf4ae79..f36bb244f8e4874b90572ecb44ed6e2f3fa9592b:/src/smpi/colls/smpi_default_selector.cpp

diff --git a/src/smpi/colls/smpi_default_selector.cpp b/src/smpi/colls/smpi_default_selector.cpp
index d674e4ad56..41fe01a7cd 100644
--- a/src/smpi/colls/smpi_default_selector.cpp
+++ b/src/smpi/colls/smpi_default_selector.cpp
@@ -1,13 +1,13 @@
 /* selector with default/naive Simgrid algorithms. These should not be trusted for performance evaluations */
 
-/* Copyright (c) 2009-2010, 2013-2017. The SimGrid Team.
+/* Copyright (c) 2009-2018. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
  * under the terms of the license (GNU LGPL) which comes with this package. */
 
-#include "colls_private.h"
-#include "src/smpi/smpi_process.hpp"
+#include "colls_private.hpp"
+#include "smpi_process.hpp"
 
 namespace simgrid{
 namespace smpi{
@@ -213,6 +213,8 @@ int Coll_reduce_default::reduce(void *sendbuf, void *recvbuf, int count, MPI_Dat
 
   int rank = comm->rank();
   int size = comm->size();
+  if (size <= 0)
+    return MPI_ERR_COMM;
   //non commutative case, use a working algo from openmpi
   if (op != MPI_OP_NULL && not op->is_commutative()) {
     return Coll_reduce_ompi_basic_linear::reduce(sendtmpbuf, recvbuf, count, datatype, op, root, comm);