{"ast_node_type":"other","tokens":[{"end":15,"kind":"keyword","start":0,"text":"debug!("}]}
        debug!(
        let upvar_span = tcx.hir_span(upvar_hir_id);
            "get_upvar_name_and_span_for_region: upvar_name={upvar_name:?} upvar_span={upvar_span:?}",