(stop_translation_timestep): robustness for ambiti.

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

diff --git a/lily/tie-engraver.cc b/lily/tie-engraver.cc
index a6204b035cc60f5a2f2183ab61046f0a3655cbeb..11f534cdec8af2d792dbb205b55127420a979a19 100644 (file)
--- a/lily/tie-engraver.cc
+++ b/lily/tie-engraver.cc
@@ -190,6 +190,13 @@ Tie_engraver::stop_translation_timestep ()
       Stream_event *left_ev
        = unsmob_stream_event (head->get_property ("cause"));
 
+      if (!left_ev)
+       {
+         // may happen for ambituses
+         continue;
+       }
+           
+      
       SCM left_articulations = left_ev->get_property ("articulations");
 
       Music *tie_event = 0;