{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"assert!(!self.tcx.intrinsic(fallback.def_id()).unwrap().must_be_overridden);"}]}
                    assert!(!self.tcx.intrinsic(fallback.def_id()).unwrap().must_be_overridden);
                )? {
                    assert_matches!(fallback.def, ty::InstanceKind::Item(_));