From: Vladislav Sovrasov <sovrasov.vlad@gmail.com>
Date: Mon, 26 Jun 2017 09:30:03 +0000 (+0300)
Subject: core: forbid handling of the case when src=dst in cv::repeat
X-Git-Tag: accepted/tizen/6.0/unified/20201030.111113~908^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4f9871817a97b31eae197a0a1e4e777fcd5b03fc;p=platform%2Fupstream%2Fopencv.git

core: forbid handling of the case when src=dst in cv::repeat
---

diff --git a/modules/core/src/copy.cpp b/modules/core/src/copy.cpp
index ec039d4..87c0b9d 100644
--- a/modules/core/src/copy.cpp
+++ b/modules/core/src/copy.cpp
@@ -856,6 +856,7 @@ void repeat(InputArray _src, int ny, int nx, OutputArray _dst)
 {
     CV_INSTRUMENT_REGION()
 
+    CV_Assert(_src.getObj() != _dst.getObj());
     CV_Assert( _src.dims() <= 2 );
     CV_Assert( ny > 0 && nx > 0 );
 
diff --git a/modules/core/test/test_misc.cpp b/modules/core/test/test_misc.cpp
index e018d74..edbd184 100644
--- a/modules/core/test/test_misc.cpp
+++ b/modules/core/test/test_misc.cpp
@@ -145,3 +145,12 @@ TEST(Core_String, end_method_regression)
     cv::String new_string(old_string.begin(), old_string.end());
     EXPECT_EQ(6u, new_string.size());
 }
+
+TEST(Core_Copy, repeat_regression_8972)
+{
+    Mat src = (Mat_<int>(1, 4) << 1, 2, 3, 4);
+
+    ASSERT_ANY_THROW({
+                         repeat(src, 5, 1, src);
+                     });
+}