be sure that layer exists

qgis · Apr 8, 2016 · 31e6d28 · 31e6d28
1 parent 54cc56f
commit 31e6d28
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/app/qgsvectorlayerproperties.cpp b/src/app/qgsvectorlayerproperties.cpp
@@ -1262,11 +1262,12 @@ void QgsVectorLayerProperties::updateSymbologyPage()
 
 void QgsVectorLayerProperties::setPbnQueryBuilderEnabled()
 {
-  pbnQueryBuilder->setEnabled( mLayer->dataProvider() &&
+  pbnQueryBuilder->setEnabled( mLayer &&
+                               mLayer->dataProvider() &&
                                mLayer->dataProvider()->supportsSubsetString() &&
                                !mLayer->isEditable() );
 
-  if ( mLayer->isEditable() )
+  if ( mLayer && mLayer->isEditable() )
   {
     pbnQueryBuilder->setToolTip( tr( "Stop editing mode to enable this." ) );
   }