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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// 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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