From 8ee069e649941921694a507982755f9e7755c39a Mon Sep 17 00:00:00 2001
From: ptv <ptv@opencascade.com>
Date: Thu, 10 Nov 2005 12:58:02 +0000
Subject: [PATCH] add protection to avoid exception

---
 src/GLViewer/GLViewer_Viewer2d.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/GLViewer/GLViewer_Viewer2d.cxx b/src/GLViewer/GLViewer_Viewer2d.cxx
index 74114b3f4..c7a1d297d 100644
--- a/src/GLViewer/GLViewer_Viewer2d.cxx
+++ b/src/GLViewer/GLViewer_Viewer2d.cxx
@@ -230,6 +230,8 @@ void GLViewer_Viewer2d::activateDrawers( QValueList<GLViewer_Object*>& theObject
                 aDrawer = (*oit)->getDrawer();
             }
         }
+        if ( !aDrawer )
+          continue;
         aDrawer->addObject( (*oit) );
 
         int aPriority = aDrawer->getPriority();
-- 
2.39.2