From 612ebca01568bc1b323855071ddabd48ae3d54e1 Mon Sep 17 00:00:00 2001
From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 8 Feb 2024 11:25:45 -0700
Subject: [PATCH] Work around an issue with types only forward declared.

---
 source/lac/trilinos_tpetra_communication_pattern.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/lac/trilinos_tpetra_communication_pattern.cc b/source/lac/trilinos_tpetra_communication_pattern.cc
index 9a462334a3..a797c628ab 100644
--- a/source/lac/trilinos_tpetra_communication_pattern.cc
+++ b/source/lac/trilinos_tpetra_communication_pattern.cc
@@ -49,7 +49,7 @@ namespace LinearAlgebra
                                  const IndexSet &ghost_indices,
                                  const MPI_Comm  communicator)
     {
-      comm = Teuchos::rcpFromRef(communicator);
+      comm = Teuchos::rcpFromUndefRef(communicator);
 
       auto vector_space_vector_map =
         locally_owned_indices.make_tpetra_map_rcp(*comm, false);
-- 
2.39.5