error: task functions must not be generic
 --> tests/ui/nonstatic_ref_generic.rs:4:1
  |
4 | async fn foo<'a>(_x: &'a u32) {}
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: Arguments for tasks must live forever. Try using the `'static` lifetime.
 --> tests/ui/nonstatic_ref_generic.rs:4:23
  |
4 | async fn foo<'a>(_x: &'a u32) {}
  |                       ^^