From fc8be5326092931dc12303b9d533e8fe6e95b8fb Mon Sep 17 00:00:00 2001
From: Grahame Grieve <grahameg@gmail.ccom>
Date: Thu, 14 Mar 2024 16:46:03 +1100
Subject: [PATCH] fix NPE in kindling

---
 .../main/java/org/hl7/fhir/r5/context/ContextUtilities.java    | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/ContextUtilities.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/ContextUtilities.java
index f00ae4f6d..57fbb2693 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/ContextUtilities.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/ContextUtilities.java
@@ -388,7 +388,8 @@ public class ContextUtilities implements ProfileKnowledgeProvider {
 
   public List<String> getConcreteResources() {
     if (concreteResourceNames == null) {
-      concreteResourceNames.addAll(Utilities.sorted(concreteResourceNameSet));
+      concreteResourceNames =  new ArrayList<>();
+      concreteResourceNames.addAll(Utilities.sorted(getConcreteResourceSet()));
     }
     return concreteResourceNames;
   }