{"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "computing the variances of `{}`", tcx.def_path_str(def_id) }
    query variances_of(def_id: DefId) -> &'tcx [ty::Variance] {
        cache_on_disk_if { def_id.is_local() }