From: nds <nds@opencascade.com>
Date: Tue, 24 Sep 2019 09:56:18 +0000 (+0300)
Subject: 0030995: Visualization - crash in angle computation between curvilinear faces
X-Git-Url: http://git.dev.opencascade.org/gitweb/?a=commitdiff_plain;h=428db9e53d0ef88982951a3206663efbe6186b74;p=occt-copy.git

0030995: Visualization - crash in angle computation between curvilinear faces
---

diff --git a/src/AIS/AIS.cxx b/src/AIS/AIS.cxx
index 60b6067de3..f2b74f2e45 100644
--- a/src/AIS/AIS.cxx
+++ b/src/AIS/AIS.cxx
@@ -1052,6 +1052,8 @@ Standard_Boolean AIS::InitAngleBetweenCurvilinearFaces (const TopoDS_Face&
   }
 
   aFirstLine = Handle(Geom_Line)::DownCast (aFirstSurf->UIso (aFirstU));
+  if (aFirstLine.IsNull())
+    return Standard_False;
 
   if (theSecondSurfType == AIS_KOS_Cylinder)
   {