From: David Wells <drwells@email.unc.edu>
Date: Sun, 19 Nov 2023 22:04:57 +0000 (-0500)
Subject: Fix two warnings in the test suite.
X-Git-Tag: relicensing~291^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c1c5421036a5544876f2968f0a722ae69a30094;p=dealii.git

Fix two warnings in the test suite.

These don't compile for me with -Werror.
---

diff --git a/tests/lac/tensor_product_matrix_08.cc b/tests/lac/tensor_product_matrix_08.cc
index 250b0c8996..fbb41b2b86 100644
--- a/tests/lac/tensor_product_matrix_08.cc
+++ b/tests/lac/tensor_product_matrix_08.cc
@@ -204,7 +204,7 @@ do_test()
     std::tuple<unsigned int, bool, bool>{0, false, true} // deformed hyper-cube
   };
 
-  for (const auto setting : settings)
+  for (const auto &setting : settings)
     {
       Triangulation<dim> tria;
 
diff --git a/tests/multigrid/constrained_dofs_05.cc b/tests/multigrid/constrained_dofs_05.cc
index b6fab7929f..16849b7c67 100644
--- a/tests/multigrid/constrained_dofs_05.cc
+++ b/tests/multigrid/constrained_dofs_05.cc
@@ -95,7 +95,7 @@ check()
 
       // Print faces that connect to coarser DoF
       deallog << "  Faces neighboring coarser cells:" << std::endl;
-      for (const auto level_cell : dof_handler.cell_iterators_on_level(level))
+      for (const auto &level_cell : dof_handler.cell_iterators_on_level(level))
         {
           // Iterate over all faces
           for (const unsigned int i_face : GeometryInfo<dim>::face_indices())
@@ -128,7 +128,7 @@ check()
       // Print faces that have periodic neighbors
       deallog << "  Faces having periodic neighbors of same level:"
               << std::endl;
-      for (const auto level_cell : dof_handler.cell_iterators_on_level(level))
+      for (const auto &level_cell : dof_handler.cell_iterators_on_level(level))
         {
           // Iterate over all faces
           for (const unsigned int i_face : GeometryInfo<dim>::face_indices())