| // This test should never pass! |
| |
| #![feature(type_alias_impl_trait)] |
| |
| pub trait Captures<'a> {} |
| impl<T> Captures<'_> for T {} |
| |
| pub struct MyTy<'a, 'b>(Option<*mut &'a &'b ()>); |
| unsafe impl Send for MyTy<'_, 'static> {} |
| |
| pub mod step1 { |
| use super::*; |
| pub type Step1<'a, 'b: 'a> = impl Sized + Captures<'b> + 'a; |
| pub fn step1<'a, 'b: 'a>() -> Step1<'a, 'b> { |
| MyTy::<'a, 'b>(None) |
| } |
| } |
| |
| pub mod step2 { |
| pub type Step2<'a> = impl Send + 'a; |
| |
| // Although `Step2` is WF at the definition site, it's not WF in its |
| // declaration site (above). We check this in `check_opaque_meets_bounds`, |
| // which must remain sound. |
| pub fn step2<'a, 'b: 'a>() -> Step2<'a> |
| where crate::step1::Step1<'a, 'b>: Send |
| { |
| crate::step1::step1::<'a, 'b>() |
| //~^ ERROR hidden type for `Step2<'a>` captures lifetime that does not appear in bounds |
| } |
| } |
| |
| fn step3<'a, 'b>() { |
| fn is_send<T: Send>() {} |
| is_send::<crate::step2::Step2::<'a>>(); |
| } |
| |
| fn main() {} |
