1 files changed, 3 insertions, 1 deletions
diff --git a/src/widgets/widgets/qcombobox.cpp b/src/widgets/widgets/qcombobox.cpp
index cc4c3416f0..2958d662c7 100644
--- a/src/widgets/widgets/qcombobox.cpp
+++ b/src/widgets/widgets/qcombobox.cpp
@@ -546,7 +546,8 @@ void QComboBoxPrivateContainer::setItemView(QAbstractItemView *itemView)
         disconnect(view, SIGNAL(destroyed()),
                    this, SLOT(viewDestroyed()));
 
-        delete view;
+        if (isAncestorOf(view))
+            delete view;
         view = 0;
     }
 
@@ -2265,6 +2266,7 @@ void QComboBox::insertItems(int index, const QStringList &list)
     // construct a QStandardItem, reducing the number of expensive signals from the model
     if (QStandardItemModel *m = qobject_cast<QStandardItemModel*>(d->model)) {
         QList<QStandardItem *> items;
+        items.reserve(insertCount);
         QStandardItem *hiddenRoot = m->invisibleRootItem();
         for (int i = 0; i < insertCount; ++i)
             items.append(new QStandardItem(list.at(i)));