From 8d9a978e9f6030193c34a35f7ca7813de4409202 Mon Sep 17 00:00:00 2001
From: Matthias Kuhn <matthias@opengis.ch>
Date: Mon, 9 Apr 2018 11:20:22 +0200
Subject: [PATCH] Properly initialize filter configuration table

---
 src/gui/processing/qgsprocessingconfigurationwidgets.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gui/processing/qgsprocessingconfigurationwidgets.cpp b/src/gui/processing/qgsprocessingconfigurationwidgets.cpp
index 14c105c5529..59357aaca4b 100644
--- a/src/gui/processing/qgsprocessingconfigurationwidgets.cpp
+++ b/src/gui/processing/qgsprocessingconfigurationwidgets.cpp
@@ -143,6 +143,7 @@ void QgsFilterAlgorithmConfigurationWidget::addOutput()
   int rowIndex = mOutputExpressionWidget->rowCount();
   mOutputExpressionWidget->setRowCount( rowIndex + 1 );
   QgsExpressionLineEdit *expressionBuilder = new QgsExpressionLineEdit();
+  mOutputExpressionWidget->setItem( rowIndex, 0, new QTableWidgetItem( QString() ) );
   mOutputExpressionWidget->setCellWidget( rowIndex, 1, expressionBuilder );
   mOutputExpressionWidget->setCellWidget( rowIndex, 2, new QCheckBox() );
 }