message: Fix compilation in debug mode
diff: @@ -121,7 +121,7 @@ void Executor::ScheduleChildPipeline(Pipeline *parent, const shared_ptr<Pipeline
  auto child_ptr = pipeline.get();
  auto dependencies = child_dependencies.find(child_ptr);
  - D_ASSERT(union_pipelines.find(child_ptr) == union_pipelines.end());
  + D_ASSERT(event_data.union_pipelines.find(child_ptr) == event_data.union_pipelines.end());
  D_ASSERT(dependencies != child_dependencies.end());
  // create the pipeline event and the event stack
  auto pipeline_event = make_shared<PipelineEvent>(pipeline);
  