From 320a322080557df3cb644c73b00ba2f45ecccf92 Mon Sep 17 00:00:00 2001
From: gka <gka@opencascade.com>
Date: Wed, 26 Oct 2016 19:31:49 +0300
Subject: [PATCH] 0026524: ShapeFix_Face crash when performing fix on an
 invalid face.

Check that method Context() returns not null handle was added.
---
 src/ShapeFix/ShapeFix_Face.cxx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/ShapeFix/ShapeFix_Face.cxx b/src/ShapeFix/ShapeFix_Face.cxx
index b5bc649e17..9ebadf5504 100644
--- a/src/ShapeFix/ShapeFix_Face.cxx
+++ b/src/ShapeFix/ShapeFix_Face.cxx
@@ -2459,7 +2459,12 @@ Standard_Boolean ShapeFix_Face::FixSplitFace(const TopTools_DataMapOfShapeListOf
     for(Standard_Integer i=1; i<=faces.Length(); i++ ) 
       B.Add(Comp,faces(i));
     myResult = Comp;
-    Context()->Replace ( myFace, myResult );
+
+    if(!Context().IsNull())
+    {
+      Context()->Replace ( myFace, myResult );
+    }
+
     for (TopExp_Explorer exp ( myResult, TopAbs_FACE ); exp.More(); exp.Next() ) {
       myFace = TopoDS::Face ( exp.Current() );
       BRepTools::Update(myFace);