rust/src/test/ui/regions/regions-close-object-into-object-4.rs

// revisions: base nll
// ignore-compare-mode-nll
//[nll] compile-flags: -Z borrowck=mir

trait A<T> { }

struct B<'a, T:'a>(&'a (dyn A<T> + 'a));

trait X { }
impl<'a, T> X for B<'a, T> {}

fn i<'a, T, U>(v: Box<dyn A<U>+'a>) -> Box<dyn X + 'static> {
    Box::new(B(&*v)) as Box<dyn X>
    //[base]~^ ERROR E0759
    //[nll]~^^ ERROR the parameter type `U` may not live long enough [E0310]
    //[nll]~| ERROR the parameter type `U` may not live long enough [E0310]
    //[nll]~| ERROR the parameter type `U` may not live long enough [E0310]
    //[nll]~| ERROR lifetime may not live long enough
    //[nll]~| ERROR cannot return value referencing local data `*v` [E0515]
    //[nll]~| ERROR the parameter type `U` may not live long enough [E0310]

}

fn main() {}