Fix crash when trying to render polygon with no exterior ring

Should only occur with very badly corrupted layers, but we shouldn't crash in this case
qgis · Nov 7, 2016 · 54522fd · 54522fd
1 parent d783c73
commit 54522fd
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/core/symbology-ng/qgssymbol.cpp b/src/core/symbology-ng/qgssymbol.cpp
@@ -767,6 +767,11 @@ void QgsSymbol::renderFeature( const QgsFeature& feature, QgsRenderContext& cont
         break;
       }
       const QgsPolygonV2& polygon = dynamic_cast<const QgsPolygonV2&>( *segmentizedGeometry.geometry() );
+      if ( !polygon.exteriorRing() )
+      {
+        QgsDebugMsg( "cannot render polygon with no exterior ring" );
+        break;
+      }
       _getPolygon( pts, holes, context, polygon, !tileMapRendering && clipFeaturesToExtent() );
       static_cast<QgsFillSymbol*>( this )->renderPolygon( pts, ( !holes.isEmpty() ? &holes : nullptr ), &feature, context, layer, selected );