tests/ui/traits/next-solver/unsize-good.rs

//@ compile-flags: -Znext-solver
//@ check-pass

trait Foo {}

impl Foo for i32 {}

fn main() {
    // Unsizing via struct
    let _: Box<dyn Foo> = Box::new(1i32);

    // Slice unsizing
    let y = [1, 2, 3];
    let _: &[i32] = &y;

    // Dropping auto traits
    let a: &(dyn Foo + Send) = &1;
    let _: &dyn Foo = a;
}