{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"PlaceBase::Upvar(upvar_id)"}]}
        PlaceBase::Upvar(upvar_id) => var_name(tcx, upvar_id.var_path.hir_id).to_string(),
    let variable_name = match place.base {
        _ => bug!("Capture_information should only contain upvars"),