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use std::mem;
trait Trait1<T> {}
trait Trait2<'a> {
type Ty;
}
fn _ice(param: Box<dyn for <'a> Trait1<<() as Trait2<'a>>::Ty>>) {
//~^ ERROR the trait bound `for<'a> (): Trait2<'a>` is not satisfied
let _e: (usize, usize) = unsafe{mem::transmute(param)};
}
trait Lifetime<'a> {
type Out;
}
impl<'a> Lifetime<'a> for () {
type Out = &'a ();
}
fn foo<'a>(x: &'a ()) -> <() as Lifetime<'a>>::Out {
x
}
fn takes_lifetime(_f: for<'a> fn(&'a ()) -> <() as Lifetime<'a>>::Out) {
}
fn main() {
takes_lifetime(foo);
}
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