From: Vladimir Yushutin <vyushut@clemson.edu>
Date: Sun, 19 May 2024 15:35:22 +0000 (-0400)
Subject: The direct operator== is used now.
X-Git-Tag: v9.6.0-rc1~254^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e8a33d8666233d9f4ce8f5d0115b1f680c85ebda;p=dealii.git

The direct operator== is used now.
---

diff --git a/source/lac/sparsity_tools.cc b/source/lac/sparsity_tools.cc
index a57bada4a1..d74fb69036 100644
--- a/source/lac/sparsity_tools.cc
+++ b/source/lac/sparsity_tools.cc
@@ -1022,12 +1022,10 @@ namespace SparsityTools
                               const MPI_Comm          mpi_comm,
                               const IndexSet         &locally_relevant_rows)
   {
-    IndexSet rows_dsp = dsp.row_index_set();
-    rows_dsp.subtract_set(locally_relevant_rows);
     AssertThrow(
-      rows_dsp.n_elements() == 0,
+      dsp.row_index_set() == locally_relevant_rows,
       ExcMessage(
-        "Dynamic Sparsity Pattern must be initialized with locally_relevant_rows."));
+        "The DynamicSparsityPattern must be initialized with an IndexSet that contains locally relevant indices."));
 
     IndexSet requested_rows(locally_relevant_rows);
     requested_rows.subtract_set(locally_owned_rows);