From 2cd2b75e0e31d89c8c891e4e746c4f300b55019f Mon Sep 17 00:00:00 2001
From: Keith OHara <k-ohara5a5a@oco.net>
Date: Sun, 21 Jun 2015 09:59:50 -0700
Subject: [PATCH] axis-group-interface: test result of dynamic-cast; issue 4302

---
 lily/axis-group-interface.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lily/axis-group-interface.cc b/lily/axis-group-interface.cc
index eabb81adaf..59d1d6ba24 100644
--- a/lily/axis-group-interface.cc
+++ b/lily/axis-group-interface.cc
@@ -150,6 +150,8 @@ Interval
 Axis_group_interface::part_of_line_pure_height (Grob *me, bool begin, int start, int end)
 {
   Spanner *sp = dynamic_cast<Spanner *> (me);
+  if (!sp)
+    return Interval (0, 0);
   SCM cache_symbol = begin
                      ? ly_symbol2scm ("begin-of-line-pure-height")
                      : ly_symbol2scm ("rest-of-line-pure-height");
-- 
2.39.5