# HG changeset patch
# User blanchet
# Date 1467733928 -7200
# Node ID 6840e808fe4403c2255a83668185e4b1c0938d01
# Parent  c27edca2d8279050c8bf73e302253b556119521a
tuning

diff -r c27edca2d827 -r 6840e808fe44 src/HOL/Tools/BNF/bnf_gfp_grec_sugar.ML
--- a/src/HOL/Tools/BNF/bnf_gfp_grec_sugar.ML	Tue Jul 05 17:52:08 2016 +0200
+++ b/src/HOL/Tools/BNF/bnf_gfp_grec_sugar.ML	Tue Jul 05 17:52:08 2016 +0200
@@ -1256,7 +1256,7 @@
           let val T = fastype_of1 (bound_Ts, hd args) in
             (case (Option.mapPartial (ctr_sugar_of lthy) (try (fst o dest_Type) T), T <> res_T) of
               (SOME {selss, T = Type (_, Ts), ...}, true) =>
-              (case const_of (fold (curry op @) selss []) fun_t of
+              (case const_of (flat selss) fun_t of
                 SOME sel =>
                 let
                   val args' = args |> map (typ_before explore params);