| //@ edition:2015..2021 | |
| #![feature(associated_type_defaults)] | |
| // This used to cause an ICE because assoc. type defaults weren't properly | |
| // type-checked. | |
| trait Foo<T: Default + ToString> { | |
| type Out: Default + ToString + ?Sized = dyn ToString; //~ ERROR not satisfied | |
| } | |
| impl Foo<u32> for () {} | |
| impl Foo<u64> for () {} | |
| fn main() { | |
| assert_eq!(<() as Foo<u32>>::Out::default().to_string(), "false"); | |
| //~^ ERROR no associated function or constant named `default` found for trait object | |
| } |