{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
        let mode = match ecx.tcx.static_mutability(cid.instance.def_id()) {
    while let Some((mplace, path)) = ref_tracking.next() {
            _ if cid.promoted.is_some() => CtfeValidationMode::Promoted,