From 47b6b5664aa3b91bc987fdae53b63b7583b93a71 Mon Sep 17 00:00:00 2001
From: Jefferson Amstutz <jamstutz@nvidia.com>
Date: Tue, 17 Oct 2023 19:40:14 -0500
Subject: [PATCH] fix missing null handle check in volume mapper

---
 vtkm/interop/anari/ANARIMapperVolume.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/vtkm/interop/anari/ANARIMapperVolume.cxx b/vtkm/interop/anari/ANARIMapperVolume.cxx
index 593674f84..11ad9068f 100644
--- a/vtkm/interop/anari/ANARIMapperVolume.cxx
+++ b/vtkm/interop/anari/ANARIMapperVolume.cxx
@@ -171,6 +171,9 @@ void ANARIMapperVolume::ConstructArrays(bool regenerate)
 
 void ANARIMapperVolume::UpdateSpatialField()
 {
+  if (!this->Handles->SpatialField)
+    return;
+
   auto d = this->GetDevice();
 
   anari_cpp::unsetParameter(d, this->Handles->SpatialField, "origin");