From 430e25654bf77424d9232b67f68d9175a190c91d Mon Sep 17 00:00:00 2001
From: Guo Sheng <guosheng@baidu.com>
Date: Mon, 27 May 2019 10:29:53 +0800
Subject: [PATCH] Fix the usage of out_grad lod in sequence_slice_op. (#17625)

test=develop
---
 paddle/fluid/operators/sequence_ops/sequence_slice_op.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/paddle/fluid/operators/sequence_ops/sequence_slice_op.h b/paddle/fluid/operators/sequence_ops/sequence_slice_op.h
index 146b5cc9b3..a07fc54090 100644
--- a/paddle/fluid/operators/sequence_ops/sequence_slice_op.h
+++ b/paddle/fluid/operators/sequence_ops/sequence_slice_op.h
@@ -135,7 +135,8 @@ class SequenceSliceGradOpKernel : public framework::OpKernel<T> {
     }
 
     auto lod = in->lod();
-    auto out_lod = out_grad->lod();
+    // to avoid out_grad missing lod, compute lod again
+    auto out_lod = SequenceSliceLoD(*in, offset_data, length_data);
 
     if (x_grad) {
       x_grad->mutable_data<T>(ctx.GetPlace());
-- 
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