From 386a0289bda362edd6e7c85e69775ecc6156eba6 Mon Sep 17 00:00:00 2001
From: Peng Li <lipeng17@baidu.com>
Date: Mon, 16 Oct 2017 14:50:04 +0800
Subject: [PATCH] Ensure name is not set in bias_attr in gru_step_naive_layer

---
 python/paddle/trainer_config_helpers/layers.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/python/paddle/trainer_config_helpers/layers.py b/python/paddle/trainer_config_helpers/layers.py
index 5043fb811d..962545093c 100644
--- a/python/paddle/trainer_config_helpers/layers.py
+++ b/python/paddle/trainer_config_helpers/layers.py
@@ -3679,6 +3679,11 @@ def gru_step_naive_layer(input,
     if size is None:
         size = input.size / 3
 
+    if bias_attr and bias_attr.attr.get("parameter_name", None) is not None:
+        raise ValueError("You should not specify the name of bias parameters. "
+                         "Otherwise, the three bias will share the same "
+                         "parameter matrix.")
+
     def __gate__(gate_name, offset):
         with mixed_layer(
                 name=name + "_" + gate_name,
-- 
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