Bugfix in MGTwoLevelTransfer::interpolate: forgot to copy vector

diff --git a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h
index d38b2eb6e35a602914ef148b18807a5da3cbb894..33c5ab9c6b8489fbd31c3a838d06e4b340de0709 100644 (file)
--- a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h
+++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h
@@ -2535,6 +2535,10 @@ MGTwoLevelTransfer<dim, LinearAlgebra::distributed::Vector<Number>>::
 
   const bool use_src_inplace = this->vec_fine.size() == 0;
   const auto vec_fine_ptr    = use_src_inplace ? &src : &this->vec_fine;
+
+  if (use_src_inplace == false)
+    this->vec_fine.copy_locally_owned_data_from(src);
+
   if (fine_element_is_continuous || use_src_inplace == false)
     vec_fine_ptr->update_ghost_values();