From 246f6540a26f14148ef66973775d865f2a7ad6e1 Mon Sep 17 00:00:00 2001
From: heister <heister@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Thu, 31 May 2012 17:03:59 +0000
Subject: [PATCH] step-42: fix deadlock with many CPUs

git-svn-id: https://svn.dealii.org/trunk@25588 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/examples/step-42/step-42.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/deal.II/examples/step-42/step-42.cc b/deal.II/examples/step-42/step-42.cc
index 5683e4af2a..1f434510dd 100644
--- a/deal.II/examples/step-42/step-42.cc
+++ b/deal.II/examples/step-42/step-42.cc
@@ -794,7 +794,7 @@ void Step4<dim>::assemble_nl_system (TrilinosWrappers::MPI::Vector &u)
       };
 
   system_matrix_newton.compress ();
-  system_rhs_newton.compress ();
+  system_rhs_newton.compress (Add);
 }
 
 template <int dim>
-- 
2.39.5