From 211ac8fc12c113b3d9d3a855d2df474d5845b804 Mon Sep 17 00:00:00 2001
From: Grahame Grieve <grahameg@gmail.com>
Date: Tue, 2 Jun 2020 18:21:09 +1000
Subject: [PATCH] fix bug processing profiles for v1.4.0

---
 .../main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java  | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java
index 29e141bd9..c30565bf9 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/context/BaseWorkerContext.java
@@ -309,7 +309,9 @@ public abstract class BaseWorkerContext extends I18nBase implements IWorkerConte
     for (ElementDefinition ed : sd.getDifferential().getElement()) {
       if (ed.getPath().equals("Extension.url") || ed.getPath().endsWith(".extension.url") ) {
         ed.setMin(1);
-        ed.getBase().setMin(1);
+        if (ed.hasBase()) {
+          ed.getBase().setMin(1);
+        }
       }
       if ("extension".equals(ed.getSliceName())) {
         ed.setSliceName(null);