From 21d6e8e8c80d55e4c8bbfd650afb2e1ef3dd664e Mon Sep 17 00:00:00 2001
From: minqiyang <minqiyang@baidu.com>
Date: Thu, 15 Nov 2018 19:52:40 +0800
Subject: [PATCH] Polish code

test=develop
---
 paddle/fluid/operators/expand_op.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/paddle/fluid/operators/expand_op.cc b/paddle/fluid/operators/expand_op.cc
index 526c053b5..eef238302 100644
--- a/paddle/fluid/operators/expand_op.cc
+++ b/paddle/fluid/operators/expand_op.cc
@@ -116,6 +116,10 @@ class ExpandGradOp : public framework::OperatorWithKernel {
 
     size_t start_pos = 0u;
     if (!ctx->IsRuntime()) {
+      PADDLE_ENFORCE_EQ(
+          x_dims[i], out_dims[i],
+          "The first dimension size of Input(Out@GRAD) should be "
+          "equal to the crroresponding dimension size of Input(X)");
       start_pos = 1u;
     }
 
-- 
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