diff -r 928c5a5bdc93 -r 4ae1d212100f src/Tools/Code/code_haskell.ML
--- a/src/Tools/Code/code_haskell.ML	Thu Sep 02 17:02:00 2010 +0200
+++ b/src/Tools/Code/code_haskell.ML	Thu Sep 02 19:08:48 2010 +0200
@@ -402,7 +402,7 @@
   in
     Code_Target.serialization
       (fn width => fn destination => K () o map (write_module width destination))
-      (fn present => fn width => rpair [] o format present width o Pretty.chunks o map snd)
+      (fn present => fn width => rpair (fn _ => error "no deresolving") o format present width o Pretty.chunks o map snd)
       (map (uncurry print_module) includes
         @ map serialize_module (Symtab.dest hs_program))
   end;