QmlDesigner: Fix crash on mode change

Added model pointer validity checks into a few places.

Fixes: QDS-7191
Change-Id: I94beb134f4d9a0b1c7fc9dc87da1d02ad255beaa
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

2 files changed, 8 insertions, 1 deletions

diff --git a/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp b/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp
index 2a06d5acbc..2d02ba1276 100644
--- a/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp
+++ b/src/plugins/qmldesigner/components/materialbrowser/materialbrowserview.cpp
@@ -290,6 +290,8 @@ void MaterialBrowserView::instancesCompleted(const QVector<ModelNode> &completed
         if (node.isRootNode()) {
             m_puppetResetPending  = false;
             QTimer::singleShot(1000, this, [this]() {
+                if (!model() || !model()->nodeInstanceView())
+                    return;
                 const QList<ModelNode> materials = m_widget->materialBrowserModel()->materials();
                 for (const ModelNode &node : materials)
                     model()->nodeInstanceView()->previewImageDataForGenericNode(node, {});
diff --git a/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp b/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp
index 8b3d693274..d86ef1463b 100644
--- a/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp
+++ b/src/plugins/qmldesigner/components/materialeditor/materialeditorview.cpp
@@ -416,6 +416,8 @@ void MaterialEditorView::handleToolBarAction(int action)
     }
 
     case MaterialEditorContextObject::AddNewMaterial: {
+        if (!model())
+            break;
         executeInTransaction("MaterialEditorView:handleToolBarAction", [&] {
             NodeMetaInfo metaInfo = model()->metaInfo("QtQuick3D.DefaultMaterial");
             ModelNode newMatNode = createModelNode("QtQuick3D.DefaultMaterial", metaInfo.majorVersion(),
@@ -634,7 +636,7 @@ void MaterialEditorView::auxiliaryDataChanged(const ModelNode &node, const Prope
 // request render image for the selected material node
 void MaterialEditorView::requestPreviewRender()
 {
-    if (m_selectedMaterial.isValid())
+    if (model() && model()->nodeInstanceView() && m_selectedMaterial.isValid())
         model()->nodeInstanceView()->previewImageDataForGenericNode(m_selectedMaterial, {});
 }
 
@@ -740,6 +742,9 @@ void MaterialEditorView::duplicateMaterial(const ModelNode &material)
 {
     QTC_ASSERT(material.isValid(), return);
 
+    if (!model())
+        return;
+
     TypeName matType = material.type();
     QmlObjectNode sourceMat(material);