QmlDesigner: Add extra check for invalid node

Change-Id: Id3cb9b6a2eb8230f0e3403fad30c57a67227fa5e
Reviewed-by: Aleksei German <aleksei.german@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

1 files changed, 9 insertions, 3 deletions

diff --git a/src/plugins/qmldesigner/designercore/model/qmlvisualnode.cpp b/src/plugins/qmldesigner/designercore/model/qmlvisualnode.cpp
index ab9acc25e8..9fa5ef8e42 100644
--- a/src/plugins/qmldesigner/designercore/model/qmlvisualnode.cpp
+++ b/src/plugins/qmldesigner/designercore/model/qmlvisualnode.cpp
@@ -327,17 +327,23 @@ NodeListProperty QmlVisualNode::findSceneNodeProperty(AbstractView *view, qint32
 
 bool QmlVisualNode::isFlowTransition(const ModelNode &node)
 {
-    return node.metaInfo().isValid() && node.metaInfo().isSubclassOf("FlowView.FlowTransition");
+    return node.isValid()
+            && node.metaInfo().isValid()
+            && node.metaInfo().isSubclassOf("FlowView.FlowTransition");
 }
 
 bool QmlVisualNode::isFlowDecision(const ModelNode &node)
 {
-    return node.metaInfo().isValid() && node.metaInfo().isSubclassOf("FlowView.FlowDecision");
+    return node.isValid()
+            && node.metaInfo().isValid()
+            && node.metaInfo().isSubclassOf("FlowView.FlowDecision");
 }
 
 bool QmlVisualNode::isFlowWildcard(const ModelNode &node)
 {
-    return node.metaInfo().isValid() && node.metaInfo().isSubclassOf("FlowView.FlowWildcard");
+    return node.isValid()
+            && node.metaInfo().isValid()
+            && node.metaInfo().isSubclassOf("FlowView.FlowWildcard");
 }
 
 bool QmlVisualNode::isFlowTransition() const