src/Pure/pattern.ML

                      val Hty = type_of_G env (Fty,length is,map (idx is) ks)
                      val (env',H) = Envir.genvar a (env,Hty)
                      fun lam(is) = mkabs(binders,is,app(H,map (idx is) ks));
                  in Envir.update (((G, Gty), lam js), Envir.update (((F, Fty), lam is), env'))
                  end;
-  in if TermOrd.indexname_ord (G,F) = LESS then ff(F,Fty,is,G,Gty,js) else ff(G,Gty,js,F,Fty,is) end
+  in if Term_Ord.indexname_ord (G,F) = LESS then ff(F,Fty,is,G,Gty,js) else ff(G,Gty,js,F,Fty,is) end
 
 fun unify_types thy (T, U) (env as Envir.Envir {maxidx, tenv, tyenv}) =
   if T = U then env
   else
     let val (tyenv', maxidx') = Sign.typ_unify thy (U, T) (tyenv, maxidx)