| // Checks to ensure that we properly detect when a closure constrains an opaque type |
| |
| // revisions: min_tait full_tait |
| #![feature(min_type_alias_impl_trait)] |
| #![cfg_attr(full_tait, feature(type_alias_impl_trait))] |
| //[full_tait]~^ WARN incomplete |
| |
| use std::fmt::Debug; |
| |
| fn main() { |
| type Opaque = impl Debug; |
| fn _unused() -> Opaque { String::new() } |
| let null = || -> Opaque { 0 }; //[min_tait]~ ERROR: not permitted here |
| //~^ ERROR: concrete type differs from previous defining opaque type use |
| println!("{:?}", null()); |
| } |
