From 4f93349381bc0882f14988a873683b2a23f02066 Mon Sep 17 00:00:00 2001
From: pdn <pdn@opencascade.com>
Date: Mon, 22 Sep 2014 17:36:31 +0400
Subject: [PATCH] 0025254: Protection on null pcurves in tgtfaces BRepLib

Check is pcurves are present is implemented.
---
 src/BRepLib/BRepLib.cxx | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/BRepLib/BRepLib.cxx b/src/BRepLib/BRepLib.cxx
index f339ab5828..1ff393d404 100644
--- a/src/BRepLib/BRepLib.cxx
+++ b/src/BRepLib/BRepLib.cxx
@@ -1484,6 +1484,16 @@ static Standard_Boolean tgtfaces(const TopoDS_Edge& Ed,
   const Standard_Real ta,
   const Standard_Boolean couture)
 {
+  // Check if pcurves exist on both faces of edge
+  Standard_Real aFirst,aLast;
+  Handle(Geom2d_Curve) aCurve;
+  aCurve = BRep_Tool::CurveOnSurface(Ed,F1,aFirst,aLast);
+  if(aCurve.IsNull())
+    return Standard_False;
+  aCurve = BRep_Tool::CurveOnSurface(Ed,F2,aFirst,aLast);
+  if(aCurve.IsNull())
+    return Standard_False;
+
   Standard_Real u;
   TopoDS_Edge E = Ed;
   BRepAdaptor_Surface aBAS1(F1,Standard_False);