Docs feature banner will not show on top level docs when using glob export

[iamsauravsharma]

I tried this code:

#![feature(doc_cfg)]

mod a {
    #[doc(cfg(feature = "a"))]
    #[cfg(feature = "a")]
    pub struct Test1;
}

pub use a::*;

I expected to see this happen:

Instead, this happened:

This is issue from nightly-2023-12-16. First screenshot is of nightly-2023-12-15 and second is of nightly-2023-12-16

[Nemo157]

Probably #113091, it shouldn't have affected glob re-exports but maybe did (cc @GuillaumeGomez).

[GuillaumeGomez]

Taking a look.

[GuillaumeGomez]

Same issue with a simple reexport:

mod b {
    #[doc(cfg(not(feature = "a")))]
    #[cfg(not(feature = "a"))]
    pub struct Test2;
}

pub use b::Test2;

[Nemo157]

That's what #113091 was meant to do, it wasn't meant to affect globs though.

[GuillaumeGomez]

I think there is another issue with how it's handled because nothing is listed on the item itself too:

[GuillaumeGomez]

Ok so it's the expected output for a non-glob reexport. I wrote the fix for glob reexports, just need to add tests.

[iamsauravsharma]

@GuillaumeGomez Latest nightly fixed the issue for #![feature(doc_cfg)] but it didn't fix the issue for #![feature(doc_auto_cfg)].
In latest nightly below example doesn't work

#![feature(doc_auto_cfg)]

mod a {
    #[cfg(feature = "a")]
    pub struct Test1;
}

pub use a::*;

its last working version was also nightly-2023-12-15.

[GuillaumeGomez]

Noted. Sending a fix for it as well. :)

[GuillaumeGomez]

Fixed in #120548.