QmlDesigner: Fix crash on shutdown

Change-Id: I47e20e14fe22dcad77a65b031cf65bc80bad3490
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/plugins/qmldesigner/components/edit3d/edit3dview.cpp b/src/plugins/qmldesigner/components/edit3d/edit3dview.cpp
index 7206171dc7..ac4cc1947b 100644
--- a/src/plugins/qmldesigner/components/edit3d/edit3dview.cpp
+++ b/src/plugins/qmldesigner/components/edit3d/edit3dview.cpp
@@ -220,8 +220,10 @@ void Edit3DView::modelAboutToBeDetached(Model *model)
     QTC_ASSERT(edit3DWidget()->canvas(), return);
 
     // Hide the canvas when model is detached (i.e. changing documents)
-    m_canvasCache.insert(model, edit3DWidget()->canvas()->renderImage());
-    edit3DWidget()->showCanvas(false);
+    if (edit3DWidget() && edit3DWidget()->canvas()) {
+        m_canvasCache.insert(model, edit3DWidget()->canvas()->renderImage());
+        edit3DWidget()->showCanvas(false);
+    }
 
     AbstractView::modelAboutToBeDetached(model);
 }