Lint error when needlessly supressing a lint

[lopopolo]

Rubocop (a Ruby linter) can suppress lints via a magic comment in a similar way that you can #[allow(clippy::...)]. Rubocop also has a lint that triggers if one of these comments appears and is not suppressing a lint error.

One common thing I've run into is to have many #[allow(clippy::module_name_repetitions)] and then rename the module in a refactoring, which makes these properties not required and they will remain as noise.

Is such a lint feasible?

[flip1995]

Sadly this can hardly be done in Clippy and needs to be implemented in rustc.

Is such a lint feasible?

But yes, of course this is very feasible! There even is an RFC about this feature. Also see the tracking issue: rust-lang/rust#54503.

TL;DR: The plan is to introduce an expect attribute into the compiler, that does just that.