From 171eb3cfd1ec69cb6ff72da3ca41a1a4caa74eef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20G=C3=B6rner?= <me@v4hn.de>
Date: Tue, 12 May 2020 16:44:03 +0200
Subject: [PATCH] PropertyTree: set custom SelectionModel only with valid model
 (#1504)

---
 src/rviz/properties/property_tree_widget.cpp | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/rviz/properties/property_tree_widget.cpp b/src/rviz/properties/property_tree_widget.cpp
index 28c25a16d7..c284af5453 100644
--- a/src/rviz/properties/property_tree_widget.cpp
+++ b/src/rviz/properties/property_tree_widget.cpp
@@ -103,11 +103,12 @@ void PropertyTreeWidget::setModel(PropertyTreeModel* model)
   }
   model_ = model;
   QTreeView::setModel(model_);
-  QItemSelectionModel* m = selectionModel();
-  setSelectionModel(new PropertySelectionModel(model_));
-  m->deleteLater();
   if (model_)
   {
+    QItemSelectionModel* m = selectionModel();
+    setSelectionModel(new PropertySelectionModel(model_));
+    m->deleteLater();
+
     connect(model_, SIGNAL(propertyHiddenChanged(const Property*)), this,
             SLOT(propertyHiddenChanged(const Property*)), Qt::QueuedConnection);
     connect(model_, SIGNAL(expand(const QModelIndex&)), this, SLOT(expand(const QModelIndex&)));