[3d] Fix crash when line feature cannot be buffered

E.g. when it has only one vertex (cherry picked from commit f6eed85)
qgis · Oct 11, 2020 · d4c963e · d4c963e
1 parent aa014d9
commit d4c963e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/3d/symbols/qgsline3dsymbol_p.cpp b/src/3d/symbols/qgsline3dsymbol_p.cpp
@@ -115,6 +115,8 @@ void QgsBufferedLine3DSymbolHandler::processFeature( QgsFeature &f, const Qgs3DR
 
   QgsGeos engine( g );
   QgsAbstractGeometry *buffered = engine.buffer( mSymbol.width() / 2., nSegments, endCapStyle, joinStyle, mitreLimit ); // factory
+  if ( !buffered )
+    return;
 
   if ( QgsWkbTypes::flatType( buffered->wkbType() ) == QgsWkbTypes::Polygon )
   {