From 7c51ab6d9c8c0351f7617e391d55849ae4d168d4 Mon Sep 17 00:00:00 2001
From: Edoardo Zoni <59625522+EZoni@users.noreply.github.com>
Date: Tue, 24 Aug 2021 21:21:54 -0700
Subject: WarpXComm.cpp: Fix Bug (Uninitialized MultiFabs) (#2230)

---
 Source/Parallelization/WarpXComm.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'Source/Parallelization/WarpXComm.cpp')

diff --git a/Source/Parallelization/WarpXComm.cpp b/Source/Parallelization/WarpXComm.cpp
index 0fb0eb170..09d84f210 100644
--- a/Source/Parallelization/WarpXComm.cpp
+++ b/Source/Parallelization/WarpXComm.cpp
@@ -178,6 +178,9 @@ WarpX::UpdateAuxilaryDataStagToNodal ()
                     Btmp[i] = std::make_unique<MultiFab>(cnba, dm, 1, ngtmp);
                 }
             }
+            Btmp[0]->setVal(0.0);
+            Btmp[1]->setVal(0.0);
+            Btmp[2]->setVal(0.0);
             // ParallelCopy from coarse level
             for (int i = 0; i < 3; ++i) {
                 IntVect ng = Btmp[i]->nGrowVect();
@@ -232,6 +235,9 @@ WarpX::UpdateAuxilaryDataStagToNodal ()
                         cnba, dm, 1, ngtmp);
                 }
             }
+            Etmp[0]->setVal(0.0);
+            Etmp[1]->setVal(0.0);
+            Etmp[2]->setVal(0.0);
             // ParallelCopy from coarse level
             for (int i = 0; i < 3; ++i) {
                 IntVect ng = Etmp[i]->nGrowVect();
-- 
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