Glob import with auto-derive

[truchi]

I tried this code:

#[derive(Copy, Clone)] // Or anything really...
pub enum A {
    A,
    B,
}
pub use A::*; // `A` is ambiguous

I expected this code to work the same as:

pub enum A {
    A,
    B,
}
impl Copy for A {}
impl Clone for A {
    fn clone(&self) -> A { *self }
}
pub use A::*; // No issue here

Instead, this happened: 😢

Meta

rustc --version --verbose: (Same on stable btw)

binary: rustc
commit-hash: 6c8927b0cf80ceee19386026cf9d7fd4fd9d486f
commit-date: 2020-07-26
host: x86_64-unknown-linux-gnu
release: 1.47.0-nightly
LLVM version: 10.0

Backtrace

error[E0659]: `A` is ambiguous (glob import vs macro-expanded name in the same module during import/macro resolution)
 --> src/main.rs:6:9
  |
6 | pub use A::*;
  |         ^ ambiguous name
  |
note: `A` could refer to the enum defined here
 --> src/main.rs:2:1
  |
2 | / pub enum A {
3 | |     A,
4 | |     B,
5 | | }
  | |_^
note: `A` could also refer to the variant imported here
 --> src/main.rs:6:9
  |
6 | pub use A::*;
  |         ^^^^
  = help: consider adding an explicit import of `A` to disambiguate

error: aborting due to previous error

Question on users

Hope this helps!
Below 20 IQ Rust noob
❤️

[SNCPlay42]

This is a duplicate of #62769

[Dylan-DPC]

Closing this as duplicate