allow are not applied

[Villosse]

Summary

While trying to do a code with #[allow(unused_variables)] i saw that it shows the warning message even with this line.

Reproducer

I tried this code:

#[allow(unused_variables)]
pub fn main () {
    let a = 4;
    return ()
}

Does the code make use of any (1.49) nightly feature ?

• Nightly

Godbolt link

https://godbolt.org/z/zhW6M4Yv9

Actual behavior

The current behavior is shows unused variables

Expected behavior

I expected to see is not seeing anything

GCC Version

f0558a0