Misleading error message for "use self::submodule" when "pub mod submodule;" is in the same file

[mukilan]

Example:

top.rs

use self::submodule;  // "error: unresolved import use self::submodule;"
pub mod submodule;

pub type Dummy = ();

and submodule.rs in the same directory

pub type Dummy2 = ();

The "use self::submodule" is declaring the same item name as "pub mod submodule" and should be illegal. The error message is misleading and needs to be changed.

[nrc]

slightly reduced test case with one file:

use self::submodule;  // "error: unresolved import use self::submodule;"
mod submodule {}

fn main() {}

[mukilan]

The bug also appears when an absolute path is used to import the submodule

mod top {
    use top::submodule;  // "error: unresolved import use top::submodule;"
    mod submodule {}
}

fn main() {}