{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
        let arg_argc = bx.const_int(bx.cx().type_int(), 0);
        // The Rust start function doesn't need `argc` and `argv`, so just pass zeros.
        let arg_argv = bx.const_null(bx.cx().type_ptr());