From 6e86fd37508d837f00bbada63ec521d8e173309c Mon Sep 17 00:00:00 2001
From: GaoWei8 <53294385+GaoWei8@users.noreply.github.com>
Date: Wed, 22 Jul 2020 14:43:32 +0800
Subject: [PATCH] fix concat dimension (#25606)

Fix the condition of concat dimension judgment.
---
 paddle/fluid/operators/concat_op.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/paddle/fluid/operators/concat_op.h b/paddle/fluid/operators/concat_op.h
index c9dcda1adb..bb72174be5 100644
--- a/paddle/fluid/operators/concat_op.h
+++ b/paddle/fluid/operators/concat_op.h
@@ -51,7 +51,7 @@ static inline framework::DDim ComputeAndCheckShape(
         }
       } else {
         bool check_shape =
-            is_runtime || (out_dims[j] > 0 && inputs_dims[i][j] > 0);
+            is_runtime || (inputs_dims[0][j] > 0 && inputs_dims[i][j] > 0);
         if (check_shape) {
           // check all shape in run time
           PADDLE_ENFORCE_EQ(inputs_dims[0][j], inputs_dims[i][j],
-- 
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