Allowing a lint fails on let binding.

[vi]

Example with cost_err:

fn main() {
    #[allow(const_err)]
    let _x = 42 / 0;
}

#[allow(const_err)]
fn main() {
    let _x = 42 / 0;
}

Expected: the same. Actual: warning in the first case.

[oli-obk]

This is not just a const_err thing. This issue exists for all lints.

[ehuss]

I believe this is fixed via #69185 (nightly-2020-02-21). allow(unconditional_panic) works on let _x = 42 / 0;. And more convoluted lints also work (tested up to nightly-2021-05-12):

#[allow(const_err, unconditional_panic)]
let _x = [1; {const CONST: usize = 1/0; 1}];

I'm not sure what lints the previous comment is referring to. In my tests, other lint controls seem to work (back to 1.16, 1.15 seemed to ignore them). I'll close, but if there is something else, please reopen with more information on what is not working.