From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Mon, 30 Apr 2018 16:35:24 +0000 (+0200)
Subject: Guard accessing values in Vector<Number>::zero_out_ghosts
X-Git-Tag: v9.0.0-rc1~54^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1e91943c4867bec6474d4c4024d0810a3e633ac0;p=dealii.git

Guard accessing values in Vector<Number>::zero_out_ghosts
---

diff --git a/include/deal.II/lac/la_parallel_vector.templates.h b/include/deal.II/lac/la_parallel_vector.templates.h
index c3619ddc60..fd40922872 100644
--- a/include/deal.II/lac/la_parallel_vector.templates.h
+++ b/include/deal.II/lac/la_parallel_vector.templates.h
@@ -517,9 +517,10 @@ namespace LinearAlgebra
     void
     Vector<Number>::zero_out_ghosts () const
     {
-      std::fill_n (&values[partitioner->local_size()],
-                   partitioner->n_ghost_indices(),
-                   Number());
+      if (values != nullptr)
+        std::fill_n (&values[partitioner->local_size()],
+                     partitioner->n_ghost_indices(),
+                     Number());
       vector_is_ghosted = false;
     }