From ee97a5e7573e292ea0d029a257fea0542c38e4a5 Mon Sep 17 00:00:00 2001
From: Roman Donchenko <roman.donchenko@itseez.com>
Date: Fri, 17 Jan 2014 14:13:21 +0400
Subject: [PATCH] Re-fix bug #3319 with less side effects.

---
 modules/core/src/copy.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/core/src/copy.cpp b/modules/core/src/copy.cpp
index 894776b..b87d080 100644
--- a/modules/core/src/copy.cpp
+++ b/modules/core/src/copy.cpp
@@ -286,6 +286,7 @@ void Mat::copyTo( OutputArray _dst, InputArray _mask ) const
 
     if( dims <= 2 )
     {
+        CV_Assert( size() == mask.size() );
         Size sz = getContinuousSize(*this, dst, mask, mcn);
         copymask(data, step, mask.data, mask.step, dst.data, dst.step, sz, &esz);
         return;
-- 
2.7.4