// Generate a default `impl` function body for the derived trait.
if let ast::AssocItem::Fn(ref func) = first_assoc_item {
- let _ = gen_trait_fn_body(func, trait_path, adt);
+ let _ = gen_trait_fn_body(func, trait_path, adt, None);
};
Some((impl_def, first_assoc_item))