Fixed #1427 - memory leak when overwriting feature with a new feature.

Changed grass provider to avoid copying (reuse QgsFeature instance as in other providers)


git-svn-id: http://svn.osgeo.org/qgis/trunk@9985 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: wonder

src/core/qgsfeature.cpp

@@ -61,9 +61,14 @@ QgsFeature & QgsFeature::operator=( QgsFeature const & rhs )
   mAttributes =  rhs.mAttributes;
   mValid =  rhs.mValid;
   mTypeName = rhs.mTypeName;
+
+  // make sure to delete the old geometry (if exists)
+  if (mGeometry && mOwnsGeometry)
+    delete mGeometry;
+  
   mGeometry = 0;
   mOwnsGeometry = false;
-
+  
   if ( rhs.mGeometry )
     setGeometry( *rhs.mGeometry );
 

src/providers/grass/qgsgrassprovider.cpp

@@ -293,7 +293,7 @@ bool QgsGrassProvider::nextFeature( QgsFeature& feature )
   int cat, type, id;
   unsigned char *wkb;
   int wkbsize;
-
+  
   QgsDebugMsgLevel( "entered.", 3 );
 
   if ( isEdited() || isFrozen() || !mValid )
@@ -318,7 +318,7 @@ bool QgsGrassProvider::nextFeature( QgsFeature& feature )
   QgsDebugMsg( QString( "cat = %1 type = %2 id = %3" ).arg( cat ).arg( type ).arg( id ) );
 #endif
 
-  feature = QgsFeature( id );
+  feature.setFeatureId(id);
 
   // TODO int may be 64 bits (memcpy)
   if ( type & ( GV_POINTS | GV_LINES ) ) /* points or lines */