From b9fc5625fe33b1e3026df96bb611ce52bd12f93b Mon Sep 17 00:00:00 2001
From: Andrew Hundt <ATHundt@gmail.com>
Date: Wed, 29 Mar 2017 12:40:05 -0400
Subject: [PATCH] bugfix: recursive layers, merge_test.py reproduces bug
 (#5972) (#6034)

* merge_test.py reproduces bug (#5972)

* Create copy of inputs if list

* merge_test.py axis order fix + pep8 fix
---
 tests/keras/layers/merge_test.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/keras/layers/merge_test.py b/tests/keras/layers/merge_test.py
index ebbede460..e49948515 100644
--- a/tests/keras/layers/merge_test.py
+++ b/tests/keras/layers/merge_test.py
@@ -107,6 +107,20 @@ def test_merge_concatenate():
     assert out.shape == (2, 8, 5)
     assert_allclose(out, np.concatenate([x1, x2], axis=1), atol=1e-4)
 
+    x3 = np.random.random((1, 1, 1))
+    nb_layers = 4
+    x_i = layers.Input(shape=(None, None))
+    x_list = [x_i]
+    x = x_i
+    for i in range(nb_layers):
+        x_list.append(x)
+        x = layers.concatenate(x_list, axis=1)
+    concat_model = models.Model(x_i, x)
+    concat_out = concat_model.predict([x3])
+    x3 = np.repeat(x3, 16, axis=1)
+    assert concat_out.shape == (1, 16, 1)
+    assert_allclose(concat_out, x3)
+
 
 @keras_test
 def test_merge_dot():