http://bugs.gentoo.org/210636
http://sourceware.org/ml/gdb-patches/2007-11/msg00136.html

2007-11-07  Vladimir Prus  <vladimir@codesourcery.com>

	Fix crash when a variable object being deleted
	has any of its children deleted previously.
	
	* varobj.c (delete_variable_1): Don't recurse
	into deleted children.

Index: varobj.c
===================================================================
RCS file: /cvs/src/src/gdb/varobj.c,v
retrieving revision 1.96
retrieving revision 1.97
diff -u -p -r1.96 -r1.97
--- gdb/varobj.c	27 Sep 2007 18:04:12 -0000	1.96
+++ gdb/varobj.c	7 Nov 2007 20:06:29 -0000	1.97
@@ -1292,6 +1292,8 @@ delete_variable_1 (struct cpstack **resu
   for (i = 0; i < VEC_length (varobj_p, var->children); ++i)
     {   
       varobj_p child = VEC_index (varobj_p, var->children, i);
+      if (!child)
+	continue;
       if (!remove_from_parent_p)
 	child->parent = NULL;
       delete_variable_1 (resultp, delcountp, child, 0, only_children_p);