From: David Wells <wellsd2@rpi.edu>
Date: Sat, 5 May 2018 23:15:10 +0000 (-0400)
Subject: Fix compute_local_to_global_vertex_index_map.
X-Git-Tag: v9.1.0-rc1~1210^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f10afcc2ef2ab97c22cfa50bd326bc5b6fdcfaaa;p=dealii.git

Fix compute_local_to_global_vertex_index_map.

The MPI_Allgather call should have the same value inputs for the second
and fifth arguments.
---

diff --git a/source/grid/grid_tools.cc b/source/grid/grid_tools.cc
index 1bdc4a4401..a38f743fda 100644
--- a/source/grid/grid_tools.cc
+++ b/source/grid/grid_tools.cc
@@ -2140,8 +2140,10 @@ next_cell:
     const unsigned int n_cpu = Utilities::MPI::n_mpi_processes(triangulation.get_communicator());
     std::vector<types::global_vertex_index> indices(n_cpu);
     int ierr = MPI_Allgather(&next_index, 1, DEAL_II_DOF_INDEX_MPI_TYPE, indices.data(),
-                             indices.size(), DEAL_II_DOF_INDEX_MPI_TYPE, triangulation.get_communicator());
+                             1, DEAL_II_DOF_INDEX_MPI_TYPE, triangulation.get_communicator());
     AssertThrowMPI(ierr);
+    Assert(indices.begin() + triangulation.locally_owned_subdomain() < indices.end(),
+           ExcInternalError());
     const types::global_vertex_index shift = std::accumulate(indices.begin(),
                                                              indices.begin()+triangulation.locally_owned_subdomain(),
                                                              types::global_vertex_index(0));