trace!("registering opaque type with id {:#?}", opaque_ty_id);
let opaque_ty_item = hir::Item {
def_id: opaque_ty_id,
- ident: Ident::invalid(),
+ ident: Ident::empty(),
kind: opaque_ty_item_kind,
vis: respan(self.lower_span(span.shrink_to_lo()), hir::VisibilityKind::Inherited),
span: self.lower_span(opaque_ty_span),