From: David Kastrup <dak@gnu.org>
Date: Mon, 8 Feb 2016 22:47:47 +0000 (+0100)
Subject: Issue 4767: Crash with Completion_heads_engraver and bare durations
X-Git-Tag: release/2.19.37-1~16
X-Git-Url: https://git.donarmstrong.com/lilypond.git?a=commitdiff_plain;h=0ab926218d76fa487f6935fd846796c902261e94;p=lilypond.git

Issue 4767: Crash with Completion_heads_engraver and bare durations

This checks for the existence of a pitch before using it, defaulting
to middle C.
---

diff --git a/lily/completion-note-heads-engraver.cc b/lily/completion-note-heads-engraver.cc
index c88e4cccc1..34a985d32d 100644
--- a/lily/completion-note-heads-engraver.cc
+++ b/lily/completion-note-heads-engraver.cc
@@ -164,7 +164,7 @@ Completion_heads_engraver::make_note_head (Stream_event *ev)
   Item *note = make_item ("NoteHead", ev->self_scm ());
   Pitch *pit = unsmob<Pitch> (ev->get_property ("pitch"));
 
-  int pos = pit->steps ();
+  int pos = pit ? pit->steps () : 0;
   SCM c0 = get_property ("middleCPosition");
   if (scm_is_number (c0))
     pos += scm_to_int (c0);