Guard against nullptr

qgis · Jan 20, 2019 · ab4b38c · ab4b38c
1 parent 0b248dc
commit ab4b38c
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/analysis/processing/qgsalgorithmpolygonstolines.cpp b/src/analysis/processing/qgsalgorithmpolygonstolines.cpp
@@ -134,7 +134,8 @@ QList<QgsCurve *> QgsPolygonsToLinesAlgorithm::extractRings( const QgsAbstractGe
   }
   else if ( QgsCurvePolygon *polygon = qgsgeometry_cast<QgsCurvePolygon *>( geom ) )
   {
-    rings.append( polygon->exteriorRing()->clone() );
+    if ( auto exteriorRing = polygon->exteriorRing() )
+      rings.append( exteriorRing->clone() );
     for ( int i = 0; i < polygon->numInteriorRings(); ++i )
     {
       rings.append( polygon->interiorRing( i )->clone() );