From 8bfbe195ae597d6b2e2ef50194fd3fbd87205391 Mon Sep 17 00:00:00 2001
From: Matthias Kuhn <matthias@opengis.ch>
Date: Sat, 17 Jun 2017 12:39:29 +0200
Subject: [PATCH] Followup 01b4eeb: Fix crash

---
 src/providers/virtual/qgsvirtuallayersourceselect.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/providers/virtual/qgsvirtuallayersourceselect.cpp b/src/providers/virtual/qgsvirtuallayersourceselect.cpp
index c34124a5534..f13c7f1ad1c 100644
--- a/src/providers/virtual/qgsvirtuallayersourceselect.cpp
+++ b/src/providers/virtual/qgsvirtuallayersourceselect.cpp
@@ -249,8 +249,8 @@ void QgsVirtualLayerSourceSelect::updateLayersList()
     QgsLayerTreeModel *model = qobject_cast<QgsLayerTreeModel *>( mTreeView->model() );
     Q_FOREACH ( QgsLayerTreeLayer *layer, model->rootGroup()->findLayers() )
     {
-      Q_ASSERT( layer->layer() );
-      if ( layer->layer()->type() == QgsMapLayer::VectorLayer && static_cast<QgsVectorLayer *>( layer->layer() )->providerType() == QLatin1String( "virtual" ) )
+      QgsVectorLayer *vl = qobject_cast<QgsVectorLayer *>( layer->layer() );
+      if ( vl && vl->providerType() == QLatin1String( "virtual" ) )
       {
         // store layer's id as user data
         mLayerNameCombo->addItem( layer->layer()->name(), layer->layer()->id() );