From 4c6b4bc75a0e234aa60a64764cb4dca4fbb686f2 Mon Sep 17 00:00:00 2001
From: ibs <ibs@opencascade.com>
Date: Fri, 22 Jul 2016 16:02:30 +0300
Subject: [PATCH] 0027706: Foundation Classes - OSD_Path::DownTrek() crashes on
 empty argument

a required check added
---
 src/OSD/OSD_Path.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/OSD/OSD_Path.cxx b/src/OSD/OSD_Path.cxx
index c434dbe7f6..5ceb3669b1 100644
--- a/src/OSD/OSD_Path.cxx
+++ b/src/OSD/OSD_Path.cxx
@@ -1085,7 +1085,7 @@ void OSD_Path :: DownTrek ( const TCollection_AsciiString& aName ) {
 
  Standard_Integer pos = myTrek.Length ();
 
- if (  aName.Value ( 1 ) != '|'    &&
+ if ( !aName.IsEmpty() && aName.Value ( 1 ) != '|'    &&
        pos                                 &&
        myTrek.Value ( pos ) != '|'
  )