Check if boundary particles container has been created before clearan…

…ce. (AMReX-Codes#2935) This fixes a segmentation fault when using more GPUs for updating particles than fluid.
Thierry992 · Sep 6, 2022 · 8f8198c · 8f8198c
1 parent fb0b31e
commit 8f8198c
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/Src/Particle/AMReX_NeighborParticlesI.H b/Src/Particle/AMReX_NeighborParticlesI.H
@@ -822,8 +822,10 @@ selectActualNeighbors (CheckPair&& check_pair, int num_cells)
     for (int lev = 0; lev < this->numLevels(); ++lev)
     {
         // clear previous neighbor particle ids
-        for (auto& keyval: m_boundary_particle_ids[lev]) {
-          keyval.second.clear();
+        if (!m_boundary_particle_ids.empty()) {
+          for (auto& keyval: m_boundary_particle_ids[lev]) {
+            keyval.second.clear();
+          }
         }
 
         for (MyParIter pti(*this, lev); pti.isValid(); ++pti) {