X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/e709643ef0c5b61c6c878016c418bffa2b1b20cd..563f95bdac3609c1d784e3efa21cb3976d6abedd:/src/smpi/bindings/smpi_pmpi_op.cpp

diff --git a/src/smpi/bindings/smpi_pmpi_op.cpp b/src/smpi/bindings/smpi_pmpi_op.cpp
index 8c14f06d5b..e90a6ba99b 100644
--- a/src/smpi/bindings/smpi_pmpi_op.cpp
+++ b/src/smpi/bindings/smpi_pmpi_op.cpp
@@ -1,4 +1,4 @@
-/* Copyright (c) 2007-2020. The SimGrid Team. All rights reserved.          */
+/* Copyright (c) 2007-2021. 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. */
@@ -22,6 +22,8 @@ int PMPI_Op_free(MPI_Op * op)
 {
   CHECK_NULL(1, MPI_ERR_ARG, op)
   CHECK_MPI_NULL(1, MPI_OP_NULL, MPI_ERR_OP, *op)
+  if((*op)->is_predefined())
+    return MPI_ERR_OP;
   simgrid::smpi::Op::unref(op);
   *op = MPI_OP_NULL;
   return MPI_SUCCESS;