From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 29 Mar 2024 19:21:50 +0000 (-0600)
Subject: Fix a second place where particles compute the size of a buffer.
X-Git-Tag: v9.6.0-rc1~427^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f63778cf09ffd05bb3a61c8ff100245d9edfb9ff;p=dealii.git

Fix a second place where particles compute the size of a buffer.
---

diff --git a/include/deal.II/particles/particle_accessor.h b/include/deal.II/particles/particle_accessor.h
index 447af7832d..8e5af0e47b 100644
--- a/include/deal.II/particles/particle_accessor.h
+++ b/include/deal.II/particles/particle_accessor.h
@@ -883,8 +883,9 @@ namespace Particles
   {
     Assert(state() == IteratorState::valid, ExcInternalError());
 
-    std::size_t size = sizeof(get_id()) + sizeof(get_location()) +
-                       sizeof(get_reference_location());
+    std::size_t size = sizeof(get_id()) +
+                       sizeof(double) * spacedim + // get_location()
+                       sizeof(double) * dim;       // get_reference_location()
 
     if (has_properties())
       {
diff --git a/source/particles/particle_handler.cc b/source/particles/particle_handler.cc
index e3ba25194c..7280ba15e2 100644
--- a/source/particles/particle_handler.cc
+++ b/source/particles/particle_handler.cc
@@ -2366,7 +2366,19 @@ namespace Particles
           &(*data_range.begin()) + (data_range.end() - data_range.begin()));
 
         while (data < end)
-          insert_particle(data, cell_to_store_particles);
+          {
+            const void *old_data = data;
+            const auto  x = insert_particle(data, cell_to_store_particles);
+
+            // Ensure that the particle read exactly as much data as
+            // it promised it needs to store its data
+            const void *new_data = data;
+            (void)old_data;
+            (void)new_data;
+            (void)x;
+            AssertDimension((const char *)new_data - (const char *)old_data,
+                            x->serialized_size_in_bytes());
+          }
 
         Assert(data == end,
                ExcMessage(