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//@ 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() {
}
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