From: Joe Neeman <joeneeman@gmail.com>
Date: Fri, 16 Jan 2009 17:54:17 +0000 (-0800)
Subject: Fix segfault in Rest_collision_engraver if there is no NoteColumn.
X-Git-Tag: release/2.12.2-1~4^2~19
X-Git-Url: https://git.donarmstrong.com/?a=commitdiff_plain;h=42ecccb1b2e20346ae6a99c690e1a29fae006d4c;p=lilypond.git

Fix segfault in Rest_collision_engraver if there is no NoteColumn.
---

diff --git a/lily/rest-collision-engraver.cc b/lily/rest-collision-engraver.cc
index 7156409d51..4720368c90 100644
--- a/lily/rest-collision-engraver.cc
+++ b/lily/rest-collision-engraver.cc
@@ -10,6 +10,7 @@
 
 #include "duration.hh"
 #include "engraver.hh"
+#include "international.hh"
 #include "item.hh"
 #include "moment.hh"
 #include "note-column.hh"
@@ -53,6 +54,11 @@ Rest_collision_engraver::process_acknowledged ()
       if (Rhythmic_head::has_interface (g) && (*m) > now)
 	{
 	  Grob *column = g->get_parent (X_AXIS);
+	  if (!column)
+	    {
+	      g->warning (_ ("rhythmic head is not part of a rhythmic column"));
+	      continue;
+	    }
 
 	  // Only include rests that start now. Include notes that started any time.
 	  Paper_column *paper_column = dynamic_cast<Item*> (column)->get_column ();