QmlDesigner: Fix crash on shutdown

Change-Id: I95c37a33d7ad346b9d5d031bbfe022527c70e253
Reviewed-by: Henning Gründl <henning.gruendl@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

2 files changed, 3 insertions, 2 deletions

diff --git a/src/plugins/qmldesigner/components/timelineeditor/timelineview.cpp b/src/plugins/qmldesigner/components/timelineeditor/timelineview.cpp
index a8b20f8380..7272735be2 100644
--- a/src/plugins/qmldesigner/components/timelineeditor/timelineview.cpp
+++ b/src/plugins/qmldesigner/components/timelineeditor/timelineview.cpp
@@ -89,7 +89,8 @@ void TimelineView::modelAttached(Model *model)
 
 void TimelineView::modelAboutToBeDetached(Model *model)
 {
-    m_timelineWidget->reset();
+    if (!m_timelineWidget)
+        m_timelineWidget->reset();
     const bool empty = getTimelines().isEmpty();
     if (!empty)
         setTimelineRecording(false);
diff --git a/src/plugins/qmldesigner/components/timelineeditor/timelineview.h b/src/plugins/qmldesigner/components/timelineeditor/timelineview.h
index f1f39b6a35..13efe40ba3 100644
--- a/src/plugins/qmldesigner/components/timelineeditor/timelineview.h
+++ b/src/plugins/qmldesigner/components/timelineeditor/timelineview.h
@@ -100,7 +100,7 @@ public:
 
 private:
     TimelineWidget *createWidget();
-    TimelineWidget *m_timelineWidget = nullptr;
+    QPointer<TimelineWidget> m_timelineWidget;
     bool hasQtQuickTimelineImport();
     void ensureQtQuickTimelineImport();
 };