Fix nullptr dereference when opening project with broken mesh provider

qgis · Feb 2, 2020 · e37afc8 · e37afc8
1 parent 89546fc
commit e37afc8
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/src/app/mesh/qgsmeshrendereractivedatasetwidget.cpp b/src/app/mesh/qgsmeshrendereractivedatasetwidget.cpp
@@ -141,8 +141,11 @@ void QgsMeshRendererActiveDatasetWidget::setTimeRange()
 
 void QgsMeshRendererActiveDatasetWidget::enableTimeControls()
 {
-  const int scalarDatesets = mMeshLayer->dataProvider()->datasetCount( mActiveScalarDatasetGroup );
-  const int vectorDatesets = mMeshLayer->dataProvider()->datasetCount( mActiveVectorDatasetGroup );
+  const QgsMeshDataProvider *provider = mMeshLayer->dataProvider();
+  if ( !provider )
+    return;
+  const int scalarDatesets = provider->datasetCount( mActiveScalarDatasetGroup );
+  const int vectorDatesets = provider->datasetCount( mActiveVectorDatasetGroup );
   const bool isTimeVarying = ( scalarDatesets > 1 ) || ( vectorDatesets > 1 );
   mTimeComboBox->setEnabled( isTimeVarying );
   mDatasetSlider->setEnabled( isTimeVarying );