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// compile-flags:-Zverbose
#![allow(warnings)]
trait Anything { }
impl<T> Anything for T { }
fn no_region<'a, T>(mut x: T) -> Box<dyn Anything + 'a>
where
T: Iterator,
{
Box::new(x.next())
//~^ ERROR the associated type `<T as Iterator>::Item` may not live long enough
}
fn correct_region<'a, T>(mut x: T) -> Box<dyn Anything + 'a>
where
T: 'a + Iterator,
{
Box::new(x.next())
}
fn wrong_region<'a, 'b, T>(mut x: T) -> Box<dyn Anything + 'a>
where
T: 'b + Iterator,
{
Box::new(x.next())
//~^ ERROR the associated type `<T as Iterator>::Item` may not live long enough
}
fn outlives_region<'a, 'b, T>(mut x: T) -> Box<dyn Anything + 'a>
where
T: 'b + Iterator,
'b: 'a,
{
Box::new(x.next())
}
fn main() {}
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