"Foo is ambiguous" even though it's not

[oberien]

playpen

Given the following code:

mod foo {
    pub enum Foo {
        Foo(i32),
    }
}
use foo::*;
use Foo::*;

The compiler claims, that the Foo in use Foo::* could either mean the type foo::Foo imported by use foo::*, or the variant (value) Foo::Foo imported by use Foo::*:

error[E0659]: `Foo` is ambiguous (glob import vs glob import in the same module)
 --> src/lib.rs:7:5
  |
7 | use Foo::*;
  |     ^^^ ambiguous name
  |
note: `Foo` could refer to the enum imported here
 --> src/lib.rs:6:5
  |
6 | use foo::*;
  |     ^^^^^^
  = help: consider adding an explicit import of `Foo` to disambiguate
note: `Foo` could also refer to the variant imported here
 --> src/lib.rs:7:5
  |
7 | use Foo::*;
  |     ^^^^^^
  = help: consider adding an explicit import of `Foo` to disambiguate

How can a name refer to something that's not imported yet?

[petrochenkov]

This is more or less a duplicate of #62769, the root cause (#62769 (comment)) is the same.

[Mark-Simulacrum]

I'm going to close this in favor of #62769 since the root causes and specific issues are so similar.