{"ast_node_type":"other","tokens":[{"end":80,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "optimizing promoted MIR for `{}`", tcx.def_path_str(key) }
    query promoted_mir(key: DefId) -> &'tcx IndexVec<mir::Promoted, mir::Body<'tcx>> {
        cache_on_disk_if { key.is_local() }