src/Pure/variable.ML

   let
     val declared_outer = is_declared outer;
     val fixes_inner = fixes_of inner;
     val fixes_outer = fixes_of outer;
 
-    val gen_fixes = map #2 ((uncurry take) (length fixes_inner - length fixes_outer, fixes_inner));
+    val gen_fixes = map #2 (take (length fixes_inner - length fixes_outer) fixes_inner);
     val still_fixed = not o member (op =) gen_fixes;
 
     val type_occs_inner = type_occs_of inner;
     fun gen_fixesT ts =
       Symtab.fold (fn (a, xs) =>