update

paddle/fluid/operators/reader/create_double_buffer_reader_op.cc

@@ -25,7 +25,7 @@ class CreateDoubleBufferReaderOp : public framework::OperatorBase {
  private:
   void RunImpl(const framework::Scope& scope,
                const platform::Place& dev_place) const override {
-    auto* out = scope.Var(Output("Out"))
+    auto* out = scope.FindVar(Output("Out"))
                     ->template GetMutable<framework::ReaderHolder>();
     if (out->Get() != nullptr) {
       return;