From 5bd2d1080a904b9171ccf67520f5a172a8c3014b Mon Sep 17 00:00:00 2001
From: Han-Wen Nienhuys <hanwen@xs4all.nl>
Date: Sat, 15 Dec 2007 21:40:12 -0200
Subject: [PATCH] Fix #527.

Don't generate rods for spanner without bounds.
---
 lily/spanner.cc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/lily/spanner.cc b/lily/spanner.cc
index 53d6693654..b5b8a933a2 100644
--- a/lily/spanner.cc
+++ b/lily/spanner.cc
@@ -358,11 +358,14 @@ Spanner::set_spacing_rods (SCM smob)
     {
       Rod r;
       Spanner *sp = dynamic_cast<Spanner *> (me);
-      
-
       System *root = get_root_system (me);
-      vector<Item*> cols (root->broken_col_range (sp->get_bound (LEFT)->get_column (),
-						  sp->get_bound (RIGHT)->get_column ()));
+      Drul_array<Item*> bounds (sp->get_bound (LEFT),
+				sp->get_bound (RIGHT));
+      if (!bounds[LEFT] || !bounds[RIGHT])
+	return SCM_UNSPECIFIED;
+      
+      vector<Item*> cols (root->broken_col_range (bounds[LEFT]->get_column (),
+						  bounds[RIGHT]->get_column ()));
 
       if (cols.size ())
 	{
-- 
2.39.5