From 54d7ede54447e7837b5b697bd919f895649c5e50 Mon Sep 17 00:00:00 2001
From: Erlend Aasland <erlend.aasland@mac.com>
Date: Fri, 11 Jan 2008 02:14:34 +0100
Subject: [PATCH] Fix issue 542: Harden Grob::relative_coordinate()

---
 lily/grob.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lily/grob.cc b/lily/grob.cc
index fbb4683f4a..7f78b5ff60 100644
--- a/lily/grob.cc
+++ b/lily/grob.cc
@@ -265,7 +265,8 @@ Grob::translate_axis (Real y, Axis a)
 Real
 Grob::relative_coordinate (Grob const *refp, Axis a) const
 {
-  if (refp == this)
+  /* eaa - hmmm, should we do a programming_error() here? */
+  if ((this == NULL) || (refp == this))
     return 0.0;
 
   /* We catch PARENT_L_ == nil case with this, but we crash if we did
-- 
2.39.5