Issue 5052: Information preserving parts of issue 4342

[lilypond.git] / lily / grob-pq-engraver.cc

diff --git a/lily/grob-pq-engraver.cc b/lily/grob-pq-engraver.cc
index 174b93c26aee235b01b554371729ef082bc35b3c..a9fa75eda51d9708252519adc7f7e34b89ad9927 100644 (file)
--- a/lily/grob-pq-engraver.cc
+++ b/lily/grob-pq-engraver.cc
@@ -145,7 +145,7 @@ Grob_pq_engraver::start_translation_timestep ()
       busy = scm_cdr (busy);
     }
 
-  if (start_busy != busy)
+  if (!scm_is_eq (start_busy, busy))
     context ()->set_property ("busyGrobs", busy);
 }