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Rust errors / Names, paths and imports

Rust compiler error · checked with rustc 1.99.0

Rust error E0252: the name `baz` is defined multiple times

What it meansTwo items of the same name cannot be imported without rebinding one of the items under a new local name.

What rustc prints

error[E0252]: the name `baz` is defined multiple times
 --> main.rs:2:5
  |
1 | use foo::baz;
  |     -------- previous import of the type `baz` here
2 | use bar::baz; // error, do `use bar::baz as quux` instead
  |     ^^^^^^^^ `baz` reimported here
  |
  = note: `baz` must be defined only once in the type namespace of this module
help: you can use `as` to change the binding name of the import
  |
2 | use bar::baz as other_baz; // error, do `use bar::baz as quux` instead
  |              ++++++++++++

Real output of rustc 1.99.0 compiling the official example below (2021 edition). Your names and line numbers will differ; the first line is the part to match.

E0252Names, paths and imports
Activein rustc 1.99.0
8related errors linked below

The compiler team's explanation

Two items of the same name cannot be imported without rebinding one of the items under a new local name.

Erroneous code example:

use foo::baz;
use bar::baz; // error, do `use bar::baz as quux` instead

fn main() {}

mod foo {
    pub struct baz;
}

mod bar {
    pub mod baz {}
}

You can use aliases in order to fix this error. Example:

use foo::baz as foo_baz;
use bar::baz; // ok!

fn main() {}

mod foo {
    pub struct baz;
}

mod bar {
    pub mod baz {}
}

Or you can reference the item with its parent:

use bar::baz;

fn main() {
    let x = foo::baz; // ok!
}

mod foo {
    pub struct baz;
}

mod bar {
    pub mod baz {}
}

From rustc --explain E0252 (1.99.0), part of the Rust project, MIT or Apache-2.0. Official page.

Related errors

All 518 Rust error codes · Rust crate data · Glossary

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