From bdf9cf3e752254a4c8172031d8a493955a9fca9c Mon Sep 17 00:00:00 2001
From: Martin Stamm <martin.stamm@camunda.com>
Date: Fri, 18 Feb 2022 11:58:54 +0100
Subject: [PATCH] fix(drilldown): ignore elements without BusinessObject

---
 lib/features/drilldown/SubprocessCompatibility.js     | 5 +++++
 test/spec/features/drilldown/legacy-subprocesses.bpmn | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/lib/features/drilldown/SubprocessCompatibility.js b/lib/features/drilldown/SubprocessCompatibility.js
index 5d8d2eee..0064be68 100644
--- a/lib/features/drilldown/SubprocessCompatibility.js
+++ b/lib/features/drilldown/SubprocessCompatibility.js
@@ -68,6 +68,11 @@ SubprocessCompatibility.prototype.createNewDiagrams = function(plane) {
 
   plane.get('planeElement').forEach(function(diElement) {
     var bo = diElement.bpmnElement;
+
+    if (!bo) {
+      return;
+    }
+
     var parent = bo.$parent;
 
     if (is(bo, 'bpmn:SubProcess') && !diElement.isExpanded) {
diff --git a/test/spec/features/drilldown/legacy-subprocesses.bpmn b/test/spec/features/drilldown/legacy-subprocesses.bpmn
index 777823e0..02fa3ac0 100644
--- a/test/spec/features/drilldown/legacy-subprocesses.bpmn
+++ b/test/spec/features/drilldown/legacy-subprocesses.bpmn
@@ -50,6 +50,9 @@
       <bpmndi:BPMNShape id="Activity_1hpaeri_di" bpmnElement="emptyProcess">
         <dc:Bounds x="960" y="50" width="100" height="80" />
       </bpmndi:BPMNShape>
+      <bpmndi:BPMNShape id="ignored_di">
+        <dc:Bounds x="0" y="0" width="100" height="80" />
+      </bpmndi:BPMNShape>
     </bpmndi:BPMNPlane>
   </bpmndi:BPMNDiagram>
 </bpmn:definitions>
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