1.1 --- a/src/HOL/Tools/TFL/tfl.ML	Tue Oct 20 16:13:01 2009 +0200
     1.2 +++ b/src/HOL/Tools/TFL/tfl.ML	Wed Oct 21 08:14:38 2009 +0200
     1.3 @@ -531,7 +531,7 @@
     1.4                   then writeln (cat_lines ("Extractants =" ::
     1.5                    map (Display.string_of_thm_global thy) extractants))
     1.6                   else ()
     1.7 -     val TCs = List.foldr (gen_union (op aconv)) [] TCl
     1.8 +     val TCs = List.foldr (union (op aconv)) [] TCl
     1.9       val full_rqt = WFR::TCs
    1.10       val R' = S.mk_select{Bvar=R1, Body=S.list_mk_conj full_rqt}
    1.11       val R'abs = S.rand R'