fn main() { let cell = once_cell_serde::sync::OnceCell::::new(); cell.get_or_init(|| { cell.get_or_init(|| 1); 2 }); } /// Dummy test to make it seem hang when compiled as `--test` /// See https://github.com/matklad/once_cell/issues/79 #[test] fn dummy_test() { std::thread::sleep(std::time::Duration::from_secs(4)); }