rust/tests/ui/wf/wf-convert-unsafe-trait-obj-box.rs
2023-01-11 09:32:08 +00:00

19 lines
397 B
Rust

// Check that we do not allow casts or coercions
// to object unsafe trait objects inside a Box
#![feature(object_safe_for_dispatch)]
trait Trait: Sized {}
struct S;
impl Trait for S {}
fn takes_box(t: Box<dyn Trait>) {}
fn main() {
Box::new(S) as Box<dyn Trait>; //~ ERROR E0038
let t_box: Box<dyn Trait> = Box::new(S); //~ ERROR E0038
takes_box(Box::new(S)); //~ ERROR E0038
}