From: Timo Heister <timo.heister@gmail.com>
Date: Fri, 23 Jan 2015 14:34:01 +0000 (-0500)
Subject: fix tests/mpi/step-39
X-Git-Tag: v8.3.0-rc1~519^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F467%2Fhead;p=dealii.git

fix tests/mpi/step-39

And yes, making a copy of the matrix was indeed a mistake here.
---

diff --git a/tests/mpi/step-39.cc b/tests/mpi/step-39.cc
index f9ee1d0ee1..9180b959cf 100644
--- a/tests/mpi/step-39.cc
+++ b/tests/mpi/step-39.cc
@@ -563,7 +563,7 @@ namespace Step39
     SolverControl coarse_solver_control (1000, 1e-10, false, false);
     SolverCG<TrilinosWrappers::MPI::Vector> coarse_solver(coarse_solver_control);
     PreconditionIdentity identity;
-    TrilinosWrappers::SparseMatrix coarse_matrix = mg_matrix[0];
+    TrilinosWrappers::SparseMatrix & coarse_matrix = mg_matrix[0];
     MGCoarseGridLACIteration<SolverCG<TrilinosWrappers::MPI::Vector>,TrilinosWrappers::MPI::Vector>
     coarse_grid_solver(coarse_solver, coarse_matrix, identity);