{"ast_node_type":"variable","tokens":[{"end":57,"kind":"keyword","start":0,"text":"let"}]}
        let mut alt_stack: libc::stack_t = mem::zeroed();
        let alt_stack_size: usize = min_sigstack_size() + 64 * 1024;
        alt_stack.ss_sp = alloc(Layout::from_size_align(alt_stack_size, 1).unwrap()).cast();