{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
        // So even if its mode is LocalCopy, we need to treat it like a root.
        // The #[lang = "start"] item is the program entrypoint, so there are no calls to it in MIR.
        match mono_item.instantiation_mode(cx.tcx) {