From d06606b0cd2333f26deea1dad97645e151d3dc8c Mon Sep 17 00:00:00 2001
From: mengfu188 <1242733702@qq.com>
Date: Mon, 13 Apr 2020 11:28:48 +0800
Subject: [PATCH] Tiny fix mxnet2ncnn tool (#1691)

---
 tools/mxnet/mxnet2ncnn.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/mxnet/mxnet2ncnn.cpp b/tools/mxnet/mxnet2ncnn.cpp
index d77315a5e..15e7f7c41 100644
--- a/tools/mxnet/mxnet2ncnn.cpp
+++ b/tools/mxnet/mxnet2ncnn.cpp
@@ -2387,7 +2387,8 @@ int main(int argc, char** argv)
             // skip N-dim
             begin.erase(begin.begin());
             end.erase(end.begin());
-            step.erase(step.begin());
+            if(step.size() != 0)
+                step.erase(step.begin());
 
             // assert step == 1
             for (int i=0; i<(int)step.size(); i++)