From: Marc Fehling <mafehling.git@gmail.com>
Date: Tue, 16 Aug 2022 23:33:40 +0000 (-0600)
Subject: Assert for released handle on Transfer classes.
X-Git-Tag: v9.5.0-rc1~1040^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fde350c9c830258c46db1d1076bff2340509b207;p=dealii.git

Assert for released handle on Transfer classes.
---

diff --git a/include/deal.II/distributed/cell_data_transfer.templates.h b/include/deal.II/distributed/cell_data_transfer.templates.h
index 83dd4fbadb..8cd5508780 100644
--- a/include/deal.II/distributed/cell_data_transfer.templates.h
+++ b/include/deal.II/distributed/cell_data_transfer.templates.h
@@ -104,6 +104,10 @@ namespace parallel
           &(*triangulation));
       Assert(tria != nullptr, ExcInternalError());
 
+      Assert(handle == numbers::invalid_unsigned_int,
+             ExcMessage("You can only add one data container per "
+                        "CellDataTransfer object."));
+
       handle = tria->register_data_attach(
         [this](const typename parallel::distributed::
                  Triangulation<dim, spacedim>::cell_iterator &cell,
@@ -193,6 +197,7 @@ namespace parallel
         post_unpack_action(all_out);
 
       input_vectors.clear();
+      handle = numbers::invalid_unsigned_int;
     }
 
 
diff --git a/source/distributed/solution_transfer.cc b/source/distributed/solution_transfer.cc
index ebae6e3294..3f47b9ab37 100644
--- a/source/distributed/solution_transfer.cc
+++ b/source/distributed/solution_transfer.cc
@@ -157,6 +157,10 @@ namespace parallel
             &dof_handler->get_triangulation())));
       Assert(tria != nullptr, ExcInternalError());
 
+      Assert(handle == numbers::invalid_unsigned_int,
+             ExcMessage("You can only add one solution per "
+                        "SolutionTransfer object."));
+
       handle = tria->register_data_attach(
         [this](
           const typename Triangulation<dim, spacedim>::cell_iterator &cell_,
@@ -287,6 +291,7 @@ namespace parallel
         }
 
       input_vectors.clear();
+      handle = numbers::invalid_unsigned_int;
     }