main()1 fn main() {
2     let cell = once_cell::sync::OnceCell::<u32>::new();
3     cell.get_or_init(|| {
4         cell.get_or_init(|| 1);
5         2
6     });
7 }
8 
9 /// Dummy test to make it seem hang when compiled as `--test`
10 /// See https://github.com/matklad/once_cell/issues/79
11 #[test]
dummy_test()12 fn dummy_test() {
13     std::thread::sleep(std::time::Duration::from_secs(4));
14 }
15