diff -rup B-Utils-0.25-K2jkIx-orig/t/utils/40walk.t B-Utils-0.25-K2jkIx/t/utils/40walk.t
--- B-Utils-0.25-K2jkIx-orig/t/utils/40walk.t	2014-11-22 17:16:24.000000000 -0800
+++ B-Utils-0.25-K2jkIx/t/utils/40walk.t	2014-11-22 17:16:34.000000000 -0800
@@ -10,7 +10,7 @@ my $callback = sub
 {
   my $op = shift;
   if ('COP' eq B::class($op) and  $op->file eq __FILE__) {
-    push @lines, $op->line;
+    push @lines, $op->line unless $op->name eq 'null';
   }
 };