Does it work if you run `cargo clean` and then `cargo clippy` again? Clippy runs it's lints in an early pass of the compiler/checker. Many IDEs/editors will automatically `cargo check` under the hood to grab errors. Then when you run `cargo clippy`, that part of the compilation is already cached and so clippy doesn't give you any output :(

To my knowledge (it's been a while since I looked) fixing this behavior is blocked on cargo stabilizing something and has been for literal years.

That point of frustration aside, it's worth it...Clippy is an absolutely amazing piece of software. Both for pedagogy and normal development.

EDIT: Just dug up the issue. If you're on nightly you can use `cargo clippy -Z unstable-options` to avoid the clean/rebuild. Hopefully stuff gets stabilized soon. Here's the issue for reference: https://github.com/rust-lang/rust-clippy/issues/4612