| // 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() { |
| } |
