rust/tests/ui/issues/issue-14399.rs
2024-02-16 20:02:50 +00:00

19 lines
413 B
Rust

//@ run-pass
// #14399
// We'd previously ICE if we had a method call whose return
// value was coerced to a trait object. (v.clone() returns Box<B1>
// which is coerced to Box<A>).
//@ pretty-expanded FIXME #23616
#[derive(Clone)]
struct B1;
trait A { fn foo(&self) {} } //~ WARN method `foo` is never used
impl A for B1 {}
fn main() {
let v: Box<_> = Box::new(B1);
let _c: Box<dyn A> = v.clone();
}