{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"ty::ReErased"}]}
        ty::ReErased => infcx.next_region_var(RegionVariableOrigin::Misc(span)),
    let hidden_ty = fold_regions(tcx, hidden_ty, |re, _dbi| match re.kind() {
        _ => re,