// check-pass pub trait Trait<'a, 'b> { fn method(self, _: &'static &'static ()) where 'a: 'b; } impl<'a> Trait<'a, 'static> for () { // On first glance, this seems like we have the extra implied bound that // `'a: 'static`, but we know this from the trait method where clause. fn method(self, _: &'static &'a ()) {} } fn main() {}