set number_cache.n_global_dofs to the right size in MultiGrid scenario

diff --git a/source/dofs/dof_handler_policy.cc b/source/dofs/dof_handler_policy.cc
index c3fae7123800f7927df0d8de300f208b9ed79510..c1c2ba7aaaf803645e2a255311a41920ddee2c9d 100644 (file)
--- a/source/dofs/dof_handler_policy.cc
+++ b/source/dofs/dof_handler_policy.cc
@@ -4561,7 +4561,7 @@ namespace internal
 
         NumberCache number_cache;
         number_cache.locally_owned_dofs = index_set;
-        number_cache.n_global_dofs      = dof_handler->n_dofs();
+        number_cache.n_global_dofs      = dof_handler->n_dofs(level);
         number_cache.n_locally_owned_dofs =
           number_cache.locally_owned_dofs.n_elements();
         return number_cache;