Static rustc_lint::builtin::RUST_2024_PRELUDE_COLLISIONS

pub static RUST_2024_PRELUDE_COLLISIONS: &'static Lint

The rust_2024_prelude_collisions lint detects the usage of trait methods which are ambiguous with traits added to the prelude in future editions.

Example

#![deny(rust_2024_prelude_collisions)]
trait Meow {
    fn poll(&self) {}
}
impl<T> Meow for T {}

fn main() {
    core::pin::pin!(async {}).poll();
    //                        ^^^^^^
    // This call to try_into matches both Future::poll and Meow::poll as
    // `Future` has been added to the Rust prelude in 2024 edition.
}

{{produces}}

Explanation

Rust 2024, introduces two new additions to the standard library’s prelude: Future and IntoFuture. This results in an ambiguity as to which method/function to call when an existing poll/into_future method is called via dot-call syntax or a poll/into_future associated function is called directly on a type.