From 06217ffce0e98eca57efec12125bb5286bcd904e Mon Sep 17 00:00:00 2001
From: Will Bainbridge <http://cfd.direct>
Date: Tue, 13 Dec 2022 16:05:04 +0000
Subject: [PATCH] MPPIC: IsotropyModel: Prevent null pointer access on copy
 construct

---
 .../MPPIC/IsotropyModels/IsotropyModel/IsotropyModel.C     | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/lagrangian/parcel/submodels/MPPIC/IsotropyModels/IsotropyModel/IsotropyModel.C b/src/lagrangian/parcel/submodels/MPPIC/IsotropyModels/IsotropyModel/IsotropyModel.C
index 577bba3813..ed8992b540 100644
--- a/src/lagrangian/parcel/submodels/MPPIC/IsotropyModels/IsotropyModel/IsotropyModel.C
+++ b/src/lagrangian/parcel/submodels/MPPIC/IsotropyModels/IsotropyModel/IsotropyModel.C
@@ -63,7 +63,12 @@ Foam::IsotropyModel<CloudType>::IsotropyModel
 )
 :
     CloudSubModelBase<CloudType>(cm),
-    timeScaleModel_(cm.timeScaleModel_->clone())
+    timeScaleModel_
+    (
+        cm.timeScaleModel_.valid()
+      ? cm.timeScaleModel_->clone().ptr()
+      : nullptr
+    )
 {}