mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-30 02:33:55 +00:00
29 lines
634 B
Rust
29 lines
634 B
Rust
//@ run-pass
|
|
// Regression test for #41677. The local variable was winding up with
|
|
// a type `Receiver<?T, H>` where `?T` was unconstrained, because we
|
|
// failed to enforce the WF obligations and `?T` is a bivariant type
|
|
// parameter position.
|
|
|
|
#![allow(unused_variables, dead_code)]
|
|
|
|
use std::marker::PhantomData;
|
|
|
|
trait Handle {
|
|
type Inner;
|
|
}
|
|
|
|
struct ResizingHandle<H>(PhantomData<H>);
|
|
impl<H> Handle for ResizingHandle<H> {
|
|
type Inner = H;
|
|
}
|
|
|
|
struct Receiver<T, H: Handle<Inner=T>>(PhantomData<H>);
|
|
|
|
fn channel<T>(size: usize) -> Receiver<T, ResizingHandle<T>> {
|
|
let rx = Receiver(PhantomData);
|
|
rx
|
|
}
|
|
|
|
fn main() {
|
|
}
|