@ -169,7 +169,7 @@ class RequestPrefetch final : public RequestBase {
auto scope = request_->GetMutableLocalScope();
auto invar = scope->FindVar(in_var_name);
framework::Variable* outvar = scope->FindVar(out_var_name);
framework::Variable* outvar = scope->Var(out_var_name);
request_handler_->Handle(in_var_name, scope, invar, &outvar, out_var_name);