* scripts/convert-ly.py (conv): remove \lyrics from \lyricsto.

[lilypond.git] / lily / stem-engraver.cc

diff --git a/lily/stem-engraver.cc b/lily/stem-engraver.cc
index 3483bab450b3bacfbeb3c6e02f6e313b0149c4f3..bfc7f1fbe64e1a7e5a7d704c5feb500f0a9fd46d 100644 (file)
--- a/lily/stem-engraver.cc
+++ b/lily/stem-engraver.cc
@@ -106,11 +106,15 @@ Stem_engraver::acknowledge_grob (Grob_info gi)
     {
       if (Rhythmic_head::get_stem (gi.grob_))
        return;
+
+      Music * cause = gi.music_cause ();
+      if (!cause)
+       return ;
       
       if (!stem_)
        make_stem (gi);
       
-      int duration_log = gi.music_cause ()->duration_log ();
+      int duration_log = cause->duration_log ();
       if (Stem::duration_log (stem_) != duration_log)
        {
          // FIXME: