Add assert to prevent floating point exception

diff --git a/include/deal.II/base/mpi_compute_index_owner_internal.h b/include/deal.II/base/mpi_compute_index_owner_internal.h
index ba3b542c25625b3fa9eec0179964bfdf5be7fd9d..973dd377abc7b9c28ac9e5e2db5e9877c98a79aa 100644 (file)
--- a/include/deal.II/base/mpi_compute_index_owner_internal.h
+++ b/include/deal.II/base/mpi_compute_index_owner_internal.h
@@ -499,7 +499,10 @@ namespace Utilities
             const unsigned int n_procs = n_mpi_processes(comm);
             const unsigned int my_rank = this_mpi_process(comm);
 
-            size             = owned_indices.size();
+            size = owned_indices.size();
+
+            Assert(size > 0, ExcNotImplemented());
+
             dofs_per_process = (size + n_procs - 1) / n_procs;
             if (dofs_per_process < range_minimum_grain_size)
               {