Clear the boundary particle indices' container before updating it. (A…

…MReX-Codes#2907) This avoids potential segmentation faults when one grid's particles all move to other grids.
prkkumar · Aug 8, 2022 · 59b0742 · 59b0742
1 parent 103db6e
commit 59b0742
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/Src/Particle/AMReX_NeighborParticlesI.H b/Src/Particle/AMReX_NeighborParticlesI.H
@@ -821,6 +821,11 @@ 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();
+        }
+
         for (MyParIter pti(*this, lev); pti.isValid(); ++pti) {
             PairIndex index(pti.index(), pti.LocalTileIndex());