* The grand 2005-2006 replace.

[lilypond.git] / lily / paper-score.cc

diff --git a/lily/paper-score.cc b/lily/paper-score.cc
index b7568416793f3dbc0b3e7c06858aef087d9bb233..c34e80c50287afcd3071e159823f8d5256ef5db6 100644 (file)
--- a/lily/paper-score.cc
+++ b/lily/paper-score.cc
@@ -3,7 +3,7 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1996--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1996--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
 */
 
 #include "paper-score.hh"
@@ -35,10 +35,11 @@ Paper_score::Paper_score (Paper_score const &s)
   assert (false);
 }
 
-
 void
 Paper_score::derived_mark () const
 {
+  if (layout_)
+    scm_gc_mark (layout_->self_scm ());
   scm_gc_mark (systems_);
   scm_gc_mark (paper_systems_);
 }
@@ -51,8 +52,8 @@ Paper_score::typeset_system (System *system)
 
   systems_ = scm_cons (system->self_scm (), systems_);
   system->pscore_ = this;
-
-  scm_gc_unprotect_object (system->self_scm ());
+  system->layout_ = layout_;
+  system->unprotect ();
 }
 
 Array<Column_x_positions>
@@ -106,7 +107,6 @@ Paper_score::layout () const
 {
   return layout_;
 }
-  
 
 SCM
 Paper_score::get_paper_systems () const