error: unused return value of `anyhow::__private::must_use` that must be used
 --> tests/ui/must-use.rs:8:9
  |
8 |         anyhow!("it failed");
  |         ^^^^^^^^^^^^^^^^^^^^
  |
note: the lint level is defined here
 --> tests/ui/must-use.rs:1:9
  |
1 | #![deny(unused_must_use)]
  |         ^^^^^^^^^^^^^^^
help: use `let _ = ...` to ignore the resulting value
  |
8 |         let _ = anyhow!("it failed");
  |         +++++++