1 files changed, 6 insertions, 0 deletions
diff --git a/src/qquicktreemodeladaptor.cpp b/src/qquicktreemodeladaptor.cpp
index 5a231af..08b8dbf 100644
--- a/src/qquicktreemodeladaptor.cpp
+++ b/src/qquicktreemodeladaptor.cpp
@@ -258,6 +258,9 @@ bool QQuickTreeModelAdaptor::childrenVisible(const QModelIndex &index)
 
 QModelIndex QQuickTreeModelAdaptor::mapToModel(const QModelIndex &index) const
 {
+    if (!index.isValid())
+        return QModelIndex();
+
     const int row = index.row();
     if (row < 0 || row > m_items.count() - 1)
         return QModelIndex();
@@ -268,6 +271,9 @@ QModelIndex QQuickTreeModelAdaptor::mapToModel(const QModelIndex &index) const
 
 QModelIndex QQuickTreeModelAdaptor::mapFromModel(const QModelIndex &index) const
 {
+    if (!index.isValid())
+        return QModelIndex();
+
     int row = -1;
     for (int i = 0; i < m_items.count(); ++i) {
         const QModelIndex proxyIndex = m_items[i].index;