From 5baeb67a02f3c0b3b23270b5a5c5a28b49432a25 Mon Sep 17 00:00:00 2001
From: mpv <mpv@opencascade.com>
Date: Mon, 9 Oct 2017 17:23:35 +0300
Subject: [PATCH] Fix the problem is tangent segments are not intersected.

---
 src/SketcherPrs/SketcherPrs_Tangent.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/SketcherPrs/SketcherPrs_Tangent.cpp b/src/SketcherPrs/SketcherPrs_Tangent.cpp
index 70c96ac10..bf998d812 100644
--- a/src/SketcherPrs/SketcherPrs_Tangent.cpp
+++ b/src/SketcherPrs/SketcherPrs_Tangent.cpp
@@ -80,7 +80,7 @@ bool SketcherPrs_Tangent::updateIfReadyToDisplay(double theStep, bool withColor)
 
   GeomPointPtr aPnt;
   GeomShapePtr aIntPnt = aShp1->intersect(aShp2);
-  if (aIntPnt->isVertex()) {
+  if (aIntPnt.get() && aIntPnt->isVertex()) {
     GeomVertexPtr aVetrex(new GeomAPI_Vertex(aIntPnt));
     aPnt = aVetrex->point();
   }
-- 
2.39.2