async-recursion 1.1.1

Recursion for async functions
Documentation 
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error: unused pinned boxed `Future` trait object that must be used
 --> tests/ui/must_use.rs:9:5
  |
9 |     apples(3);
  |     ^^^^^^^^^
  |
  = note: futures do nothing unless you `.await` or poll them
note: the lint level is defined here
 --> tests/ui/must_use.rs:1:9
  |
1 | #![deny(unused_must_use)]
  |         ^^^^^^^^^^^^^^^

error: unused return value of `apples` that must be used
 --> tests/ui/must_use.rs:9:5
  |
9 |     apples(3);
  |     ^^^^^^^^^
  |
help: use `let _ = ...` to ignore the resulting value
  |
9 |     let _ = apples(3);
  |     +++++++