From 691f69115046218b0faa6541404aa2839d9ae0c6 Mon Sep 17 00:00:00 2001
From: Timo Heister <timo.heister@gmail.com>
Date: Mon, 27 Nov 2017 12:04:38 -0500
Subject: [PATCH] check Trilinos compress() argument

---
 source/lac/trilinos_vector.cc | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/source/lac/trilinos_vector.cc b/source/lac/trilinos_vector.cc
index d566f9863c..db03f38913 100644
--- a/source/lac/trilinos_vector.cc
+++ b/source/lac/trilinos_vector.cc
@@ -547,6 +547,15 @@ namespace TrilinosWrappers
           else if (given_last_action==::dealii::VectorOperation::insert)
             mode = Insert;
         }
+      else
+        {
+          Assert(
+            ((last_action == Add) && (given_last_action==::dealii::VectorOperation::add))
+            ||
+            ((last_action == Insert) && (given_last_action==::dealii::VectorOperation::insert)),
+            ExcMessage("The last operation on the Vector and the given last action in the compress() call do not agree!"));
+        }
+
 
 #ifdef DEBUG
 #  ifdef DEAL_II_WITH_MPI
-- 
2.39.5