QGraphicsScene: stabilize stacking order of toplevel items

Removing and adding toplevel items could result in invalid stacking
order (not corresponding to insertion order).

Task-number: QTBUG-19316
Change-Id: Ia8646784a2181cfa936b101e2adaf7e7e73bb83d
Reviewed-by: Andreas Aardal Hanssen <andreas@hanssen.name>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/widgets/graphicsview/qgraphicsscene.cpp b/src/widgets/graphicsview/qgraphicsscene.cpp
index ae3eb1eee7..988152da9d 100644
--- a/src/widgets/graphicsview/qgraphicsscene.cpp
+++ b/src/widgets/graphicsview/qgraphicsscene.cpp
@@ -392,7 +392,7 @@ void QGraphicsScenePrivate::_q_emitUpdated()
 */
 void QGraphicsScenePrivate::registerTopLevelItem(QGraphicsItem *item)
 {
-    item->d_ptr->ensureSequentialSiblingIndex();
+    ensureSequentialTopLevelSiblingIndexes();
     needSortTopLevelItems = true; // ### maybe false
     item->d_ptr->siblingIndex = topLevelItems.size();
     topLevelItems.append(item);