Merge remote-tracking branch 'origin/3.6'

Change-Id: I68512c775ed25b51c8b0abe1818c9c7c5955874c

src/plugins/projectexplorer/projecttreewidget.cpp

@@ -278,6 +278,7 @@ int ProjectTreeWidget::expandedCount(Node *node)
 void ProjectTreeWidget::rowsInserted(const QModelIndex &parent, int start, int end)
 {
     Node *node = m_model->nodeForIndex(parent);
+    QTC_ASSERT(node, return);
     const QString path = node->path().toString();
     const QString displayName = node->displayName();