error: cacheable_loader requires key
 --> tests/cacheable/fail_missing_key.rs:5:19
  |
5 |       let _future = cacheable_loader!(
  |  ___________________^
6 | |         cache = cache,
7 | |         load = || async { Ok::<_, std::io::Error>(1_u64) },
8 | |     );
  | |_____^
  |
  = note: this error originates in the macro `cacheable_loader` (in Nightly builds, run with -Z macro-backtrace for more info)
