#![allow(elided_lifetimes_in_paths)] doesn't work in submodules

[alexcrichton]

Given code such as:

#![crate_type = "rlib"]
#![cfg_attr(crate_level, allow(elided_lifetimes_in_paths))]
#![cfg_attr(crate_level_warnings, allow(warnings))]

mod foo {
    #![allow(elided_lifetimes_in_paths)]
    #![allow(warnings)]

    use std::fmt::*;

    struct A;

    impl Debug for A {
        fn fmt(&self, _f: &mut Formatter) -> Result {
            Ok(())
        }
    }
}

When compiled this generates a warning:

$ rustc +nightly foo.rs -W elided_lifetimes_in_paths 
warning: hidden lifetime parameters in types are deprecated
...

I'm not entirely sure why the directives inside mod foo aren't taking effect. The crate-level ones do take effect, as can be seen with:

$ rustc +nightly foo.rs -W elided_lifetimes_in_paths --cfg crate_level
$ rustc +nightly foo.rs -W elided_lifetimes_in_paths --cfg crate_level_warnings

(no warnings)

[ehuss]

I think this is a duplicate of #71957.

[ehuss]

Also, a warning for this was recently added in #73300, but I think it is circumvented in your example by #![allow(warnings)].

[alexcrichton]

Ah yep that looks like the same issue!