--- qt-creator-opensource-src-3.6.1/src/plugins/coreplugin/variablechooser.cpp	2016-03-08 06:30:19.000000000 -0500
+++ qt-creator-opensource-src-3.6.1/src/plugins/coreplugin/variablechooser.cppb	2016-11-21 21:31:51.568971432 -0500
@@ -408,7 +408,8 @@
  */
 void VariableChooserPrivate::updateDescription(const QModelIndex &index)
 {
-    m_variableDescription->setText(m_model.data(index, Qt::ToolTipRole).toString());
+    if (m_variableDescription)
+        m_variableDescription->setText(m_model.data(index, Qt::ToolTipRole).toString());
 }
 
 /*!