From 957e182a900eca91343fb03cc6adeda880e578b1 Mon Sep 17 00:00:00 2001
From: hong <43953930+phlrain@users.noreply.github.com>
Date: Fri, 20 Dec 2019 15:06:48 +0800
Subject: [PATCH] revert a+b axis change; test=develop (#21821)

---
 python/paddle/fluid/layers/math_op_patch.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/python/paddle/fluid/layers/math_op_patch.py b/python/paddle/fluid/layers/math_op_patch.py
index 5a9f7705369..3a164a2fd0c 100644
--- a/python/paddle/fluid/layers/math_op_patch.py
+++ b/python/paddle/fluid/layers/math_op_patch.py
@@ -225,13 +225,15 @@ def monkey_patch_variable():
                 other_var = tmp
 
             out = create_new_tmp_var(current_block(self), dtype=lhs_dtype)
-
+            axis = -1
+            if other_var.shape[0] == -1:
+                axis = 0
             current_block(self).append_op(
                 type=op_type,
                 inputs={'X': [self],
                         'Y': [other_var]},
                 outputs={'Out': out},
-                attrs={'axis': -1})
+                attrs={'axis': axis})
             return out
 
         comment = OpProtoHolder.instance().get_op_proto(op_type).comment
-- 
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