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// issue #101663
use std::fmt::Display;
trait Wf<T> {
type Output;
}
struct NeedsDisplay<T: Display>(T);
trait Uwu {
fn nya() -> impl Wf<Vec<[u8]>>;
//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
fn nya2() -> impl Wf<[u8]>;
//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
fn nya3() -> impl Wf<(), Output = impl Wf<Vec<[u8]>>>;
//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
fn nya4<T>() -> impl Wf<NeedsDisplay<T>>;
//~^ ERROR `T` doesn't implement `std::fmt::Display`
}
fn main() {}
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