From 98535688fe0898e70d1e80dfcee17cdd1c0ce60e Mon Sep 17 00:00:00 2001
From: qiuxin2012 <qiuxin2012cs@gmail.com>
Date: Wed, 14 Jun 2017 19:27:52 +0800
Subject: [PATCH] fix concat return incorrect result when output is 1D