Fix infinite loop in Completion_heads_engraver at invalid measure position (issue...

[lilypond.git] / lily / tuplet-bracket.cc

diff --git a/lily/tuplet-bracket.cc b/lily/tuplet-bracket.cc
index d211dcae38f55b39c91cb9095791816eb07396cc..f4b4456812d0c45130a446d894cba119be12903f 100644 (file)
--- a/lily/tuplet-bracket.cc
+++ b/lily/tuplet-bracket.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2012 Jan Nieuwenhuizen <janneke@gnu.org>
+  Copyright (C) 1997--2014 Jan Nieuwenhuizen <janneke@gnu.org>
   Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
@@ -92,8 +92,10 @@ Tuplet_bracket::parallel_beam (Grob *me_grob, vector<Grob *> const &cols,
 {
   Spanner *me = dynamic_cast<Spanner *> (me_grob);
 
-  if (me->get_bound (LEFT)->break_status_dir ()
-      || me->get_bound (RIGHT)->break_status_dir ())
+  Item *left = me->get_bound (LEFT);
+  Item *right = me->get_bound (RIGHT);
+  if (!left || left->break_status_dir ()
+      || !right || right->break_status_dir ())
     return 0;
 
   Drul_array<Grob *> stems (Note_column::get_stem (cols[0]),