mirror of https://github.com/rust-lang/rust
39 lines
1001 B
Rust
39 lines
1001 B
Rust
// 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() {}
|