I'm not sure this is redundant as:

pub use foo::private;

mod foo {
    fn private() {}
}

results in an error.

@Centril
As in https://doc.rust-lang.org/stable/reference/visibility-and-privacy.html#re-exporting-and-visibility

pub use self::implementation::api;

mod implementation {
    pub mod api {
        pub fn f() {}
    }
}

Although fn f has pub vis itself, implementation::api::f is private to extern crates, and reexport makes it accessible to extern crates. I don’t know if this is a public name as mentioned here.

That example is covered by "even a definition with a private canonical path", as far as I can tell.