mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-02 07:22:42 +00:00
14 lines
337 B
Rust
14 lines
337 B
Rust
#![feature(dyn_star, trait_upcasting)]
|
|
//~^ WARN the feature `dyn_star` is incomplete and may not be safe to use and/or cause compiler crashes
|
|
|
|
trait A: B {}
|
|
trait B {}
|
|
impl A for usize {}
|
|
impl B for usize {}
|
|
|
|
fn main() {
|
|
let x: Box<dyn* A> = Box::new(1usize as dyn* A);
|
|
let y: Box<dyn* B> = x;
|
|
//~^ ERROR mismatched types
|
|
}
|