From 8e243eede497bc81b69c3c16d832003bace5a357 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Wed, 9 Feb 2022 20:34:23 -0700
Subject: [PATCH] Make a variable 'const'.

---
 include/deal.II/lac/affine_constraints.templates.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/deal.II/lac/affine_constraints.templates.h b/include/deal.II/lac/affine_constraints.templates.h
index e12b30cc99..6e06aea6ce 100644
--- a/include/deal.II/lac/affine_constraints.templates.h
+++ b/include/deal.II/lac/affine_constraints.templates.h
@@ -149,7 +149,7 @@ AffineConstraints<number>::is_consistent_in_parallel(
         }
     }
 
-  std::map<unsigned int, std::vector<ConstraintLine>> received =
+  const std::map<unsigned int, std::vector<ConstraintLine>> received =
     Utilities::MPI::some_to_some(mpi_communicator, to_send);
 
   unsigned int inconsistent = 0;
-- 
2.39.5