{"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
    let crate_attrs = tcx.hir_attrs(rustc_hir::CRATE_HIR_ID);
    // `no-builtins` attribute to each function to ensure it takes effect in LTO.
    let no_builtins = attr::contains_name(crate_attrs, sym::no_builtins);