From 69f440cf8c0bd4a9cce1d97cce2ebb54cee6dd0f Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 23 May 2015 16:09:54 +0200
Subject: Test BLOB container is not empty before calling front()

---
 odb/oracle/traits.cxx | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/odb/oracle/traits.cxx b/odb/oracle/traits.cxx
index 3488398..35a3c6c 100644
--- a/odb/oracle/traits.cxx
+++ b/odb/oracle/traits.cxx
@@ -147,7 +147,7 @@ namespace odb
 
       *p = chunk_one;
       *s = static_cast<ub4> (v.size ());
-      *b = &v.front ();
+      *b = v.empty () ? 0 : &v.front ();
 
       return true;
     }
@@ -197,7 +197,7 @@ namespace odb
 
       *p = chunk_one;
       *s = static_cast<ub4> (v.size ());
-      *b = &v.front ();
+      *b = v.empty () ? 0 : &v.front ();
 
       return true;
     }
-- 
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