X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fgrob-scheme.cc;h=1bbc53212ab2b04fa3280fcbd1639d3b2b4a1182;hb=c39d188d28fdc84cef8cbaea7b8d6e2fb718c30f;hp=e5976a569b799b4db7a4fa6562afe6ee4953cb0f;hpb=a27aa206869ce9f5520de3a825b72c71070f5077;p=lilypond.git

diff --git a/lily/grob-scheme.cc b/lily/grob-scheme.cc
index e5976a569b..1bbc53212a 100644
--- a/lily/grob-scheme.cc
+++ b/lily/grob-scheme.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1998--2012 Jan Nieuwenhuizen <janneke@gnu.org>
+  Copyright (C) 1998--2014 Jan Nieuwenhuizen <janneke@gnu.org>
   Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
@@ -25,6 +25,7 @@
 #include "paper-score.hh"
 #include "simple-closure.hh"
 #include "system.hh"
+#include "unpure-pure-container.hh"
 #include "warn.hh"              // error ()
 
 LY_DEFINE (ly_grob_property_data, "ly:grob-property-data",
@@ -450,7 +451,7 @@ LY_DEFINE (ly_grob_chain_callback, "ly:grob-chain-callback",
   Grob *gr = unsmob_grob (grob);
 
   LY_ASSERT_SMOB (Grob, grob, 1);
-  LY_ASSERT_TYPE (ly_is_procedure, proc, 2);
+  SCM_ASSERT_TYPE (ly_is_procedure (proc) || is_unpure_pure_container (proc), proc, SCM_ARG2, __FUNCTION__, "procedure or unpure pure container");
   LY_ASSERT_TYPE (ly_is_symbol, sym, 3);
 
   chain_callback (gr, proc, sym);