From: ibs <ibs@opencascade.com>
Date: Fri, 22 Jul 2016 13:02:30 +0000 (+0300)
Subject: 0027706: Foundation Classes - OSD_Path::DownTrek() crashes on empty argument
X-Git-Tag: V7_1_0_beta~236
X-Git-Url: http://git.dev.opencascade.org/gitweb/?a=commitdiff_plain;h=4c6b4bc75a0e234aa60a64764cb4dca4fbb686f2;p=occt.git

0027706: Foundation Classes - OSD_Path::DownTrek() crashes on empty argument

a required check added
---

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 ) != '|'
  )