X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/0ec122a780b6dd27347cca4d240de563e607f349..3fab894cbce7d5bdd43a6fc9aa647b3809d63507:/src/smpi/smpi_topo.cpp

diff --git a/src/smpi/smpi_topo.cpp b/src/smpi/smpi_topo.cpp
index 1e5f55d56f..16b8cfa1c3 100644
--- a/src/smpi/smpi_topo.cpp
+++ b/src/smpi/smpi_topo.cpp
@@ -150,7 +150,7 @@ int smpi_mpi_cart_create(MPI_Comm comm_old, int ndims, int dims[], int periods[]
     } else {
         if (rank == 0) {
             newCart = smpi_cart_topo_create(ndims);
-            *comm_cart = smpi_comm_new(smpi_comm_group(MPI_COMM_SELF), newCart);
+            *comm_cart = smpi_comm_new(smpi_group_copy(smpi_comm_group(MPI_COMM_SELF)), newCart);
         } else {
             *comm_cart = MPI_COMM_NULL;
         }
@@ -203,8 +203,8 @@ int smpi_mpi_cart_coords(MPI_Comm comm, int rank, int maxdims, int coords[]) {
 
 int smpi_mpi_cart_get(MPI_Comm comm, int maxdims, int* dims, int* periods, int* coords) {
     MPI_Topology topo = smpi_comm_topo(comm);
-
-    for(int i = 0 ; i < maxdims ; i++) {
+    int ndims=topo->topo.cart->ndims < maxdims ? topo->topo.cart->ndims : maxdims;
+    for(int i = 0 ; i < ndims ; i++) {
         dims[i] = topo->topo.cart->dims[i];
         periods[i] = topo->topo.cart->periodic[i];
         coords[i] = topo->topo.cart->position[i];