diff --git a/paddle/framework/grad_op_builder.cc b/paddle/framework/grad_op_builder.cc
index 6235be75f27dadb65de663ff1b3caf26a649f6cb..6d9d174eeabe49b081a79acda3d454e4f0a59481 100644
--- a/paddle/framework/grad_op_builder.cc
+++ b/paddle/framework/grad_op_builder.cc
@@ -109,7 +109,7 @@ void GradOpBuilder::CompleteGradOp(OperatorBase* grad_op) const {
   }
   grad_op->attrs_["input_format"] = in_format;
   grad_op->attrs_["output_format"] = out_format;
-  grad_op->in_out_idxs_.reset(grad_varmap);
+  grad_op->in_out_idxs_.resect(grad_varmap);
 }
 
 }  // namespace framework
diff --git a/paddle/operators/CMakeLists.txt b/paddle/operators/CMakeLists.txt
index 0a14dc21144153f9a45d5227e54102983c6c2659..6d4f8046136f77ce1516820c37da340949a45652 100644
--- a/paddle/operators/CMakeLists.txt
+++ b/paddle/operators/CMakeLists.txt
@@ -54,3 +54,4 @@ op_library(fc_op SRCS fc_op.cc DEPS mul_op rowwise_add_op sigmoid_op
         softmax_op net)
 
 op_library(sgd_op SRCS sgd_op.cc sgd_op.cu)
+cc_test(fc_op_test SRCS fc_op_test.cc DEPS fc_op)
diff --git a/paddle/operators/fc_op_test.cc b/paddle/operators/fc_op_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..796b149afef0dbc76fabeac36023e6425f55e8f5
--- /dev/null
+++ b/paddle/operators/fc_op_test.cc
@@ -0,0 +1,26 @@
+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License. */
+
+#include <gtest/gtest.h>
+#include "paddle/framework/op_registry.h"
+namespace f = paddle::framework;
+
+USE_OP_WITHOUT_KERNEL(fc);
+
+TEST(FC, create) {
+  for (size_t i = 0; i < 1000000; ++i) {
+    auto tmp = f::OpRegistry::CreateOp("fc", {"X", "W", "B"}, {"O"}, {});
+    ASSERT_NE(tmp, nullptr);
+  }
+}
\ No newline at end of file