Fix null dereference errors

Author: nyalldawson

src/core/pal/util.cpp

@@ -183,25 +183,16 @@ namespace pal
     }
   }
 
-
-
-
-//inline bool ptrGeomEq (const geos::geom::Geometry *l, const geos::geom::Geometry *r){
   inline bool ptrGeomEq( const GEOSGeometry *l, const GEOSGeometry *r )
   {
     return l == r;
   }
 
-//LinkedList<const geos::geom::Geometry*> * unmulti (geos::geom::Geometry *the_geom){
   LinkedList<const GEOSGeometry*> * unmulti( const GEOSGeometry *the_geom )
   {
-
-    //LinkedList<const geos::geom::Geometry*> *queue = new  LinkedList<const geos::geom::Geometry*>(ptrGeomEq);
-    //LinkedList<const geos::geom::Geometry*> *final_queue = new  LinkedList<const geos::geom::Geometry*>(ptrGeomEq);
     LinkedList<const GEOSGeometry*> *queue = new  LinkedList<const GEOSGeometry*> ( ptrGeomEq );
     LinkedList<const GEOSGeometry*> *final_queue = new  LinkedList<const GEOSGeometry*> ( ptrGeomEq );
 
-    //const geos::geom::Geometry *geom;
     const GEOSGeometry *geom;
 
     queue->push_back( the_geom );
@@ -214,9 +205,6 @@ namespace pal
       GEOSContextHandle_t geosctxt = geosContext();
       switch ( GEOSGeomTypeId_r( geosctxt, geom ) )
       {
-          //case geos::geom::GEOS_MULTIPOINT:
-          //case geos::geom::GEOS_MULTILINESTRING:
-          //case geos::geom::GEOS_MULTIPOLYGON:
         case GEOS_MULTIPOINT:
         case GEOS_MULTILINESTRING:
         case GEOS_MULTIPOLYGON:
@@ -233,7 +221,8 @@ namespace pal
           break;
         default:
           delete final_queue;
-          final_queue = NULL;
+          delete queue;
+          return NULL;
       }
     }
     delete queue;

src/core/qgsofflineediting.cpp

@@ -580,11 +580,14 @@ QgsVectorLayer* QgsOfflineEditing::copyVectorLayer( QgsVectorLayer* layer, sqlit
           int index = parentTreeGroup->children().indexOf( layerTreeLayer );
           // Move the new layer from the root group to the new group
           QgsLayerTreeLayer* newLayerTreeLayer = layerTreeRoot->findLayer( newLayer->id() );
-          QgsLayerTreeNode* newLayerTreeLayerClone = newLayerTreeLayer->clone();
-          QgsLayerTreeGroup* grp = qobject_cast<QgsLayerTreeGroup*>( newLayerTreeLayer->parent() );
-          parentTreeGroup->insertChildNode( index, newLayerTreeLayerClone );
-          if ( grp )
-            grp->removeChildNode( newLayerTreeLayer );
+          if ( newLayerTreeLayer )
+          {
+            QgsLayerTreeNode* newLayerTreeLayerClone = newLayerTreeLayer->clone();
+            QgsLayerTreeGroup* grp = qobject_cast<QgsLayerTreeGroup*>( newLayerTreeLayer->parent() );
+            parentTreeGroup->insertChildNode( index, newLayerTreeLayerClone );
+            if ( grp )
+              grp->removeChildNode( newLayerTreeLayer );
+          }
         }
       }
 

src/providers/ogr/qgsogrdataitems.cpp

@@ -252,8 +252,8 @@ QGISEXTERN QgsDataItem * dataItem( QString thePath, QgsDataItem* parentItem )
   bool scanExtSetting = false;
   if (( settings.value( "/qgis/scanItemsInBrowser2",
                         "extension" ).toString() == "extension" ) ||
-      ( settings.value( "/qgis/scanItemsFastScanUris",
-                        QStringList() ).toStringList().contains( parentItem->path() ) ) ||
+      ( parentItem && settings.value( "/qgis/scanItemsFastScanUris",
+                                      QStringList() ).toStringList().contains( parentItem->path() ) ) ||
       (( is_vsizip || is_vsitar ) && parentItem && parentItem->parent() &&
        settings.value( "/qgis/scanItemsFastScanUris",
                        QStringList() ).toStringList().contains( parentItem->parent()->path() ) ) )

src/server/qgswmsserver.cpp

@@ -2989,7 +2989,7 @@ QDomElement QgsWMSServer::createFeatureGML(
     typeNameElement.appendChild( bbElem );
   }
 
-  if ( withGeom )
+  if ( withGeom && geom )
   {
     //add geometry column (as gml)