From 15837b43cad5f68aaba71e98714f0265481e58c3 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.a.alekhin@gmail.com>
Date: Sat, 7 Apr 2018 12:59:10 +0000
Subject: [PATCH] imgproc: don't call .unlock() on non-holded mutex in
 houghCircles()

---
 modules/imgproc/src/hough.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/imgproc/src/hough.cpp b/modules/imgproc/src/hough.cpp
index 1266724cbe..68dfabef5b 100644
--- a/modules/imgproc/src/hough.cpp
+++ b/modules/imgproc/src/hough.cpp
@@ -1329,7 +1329,7 @@ public:
         CV_Assert(nzSz > 0);
     }
 
-    ~HoughCircleEstimateRadiusInvoker() {_lock.unlock();}
+    ~HoughCircleEstimateRadiusInvoker() {}
 
 protected:
     inline int filterCircles(const Point2f& curCenter, float* ddata) const;