.emit();
} else {
let param_env = self.tcx.param_env(def_id);
- if !can_type_implement_copy(self.tcx, param_env, ty).is_ok() {
+ if can_type_implement_copy(self.tcx, param_env, ty).is_err() {
feature_err(
&self.tcx.sess.parse_sess,
sym::untagged_unions,