From: peterrum <peterrmuench@gmail.com>
Date: Sat, 20 Jul 2019 09:37:54 +0000 (+0200)
Subject: Add assert to Utilities::MPI::compute_index_owner to check the equality of the size... 
X-Git-Tag: v9.2.0-rc1~1370^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F8397%2Fhead;p=dealii.git

Add assert to Utilities::MPI::compute_index_owner to check the equality of the size of the index sets on all processes
---

diff --git a/source/base/mpi.cc b/source/base/mpi.cc
index 986d4007a3..63c6a010e3 100644
--- a/source/base/mpi.cc
+++ b/source/base/mpi.cc
@@ -1724,6 +1724,10 @@ namespace Utilities
       Assert(owned_indices.size() == indices_to_look_up.size(),
              ExcMessage("IndexSets have to have the same sizes."));
 
+      Assert(
+        owned_indices.size() == Utilities::MPI::max(owned_indices.size(), comm),
+        ExcMessage("IndexSets have to have the same size on all processes."));
+
       std::vector<unsigned int> owning_ranks(indices_to_look_up.n_elements());
 
       // Step 1: setup dictionary