{"ast_node_type":"impl","tokens":[{"end":78,"kind":"keyword","start":0,"text":"desc"}]}
        desc { |tcx| "computing `Drop` impl for `{}`", tcx.def_path_str(key) }
    query adt_destructor(key: DefId) -> Option<ty::Destructor> {
        cache_on_disk_if { key.is_local() }