| #![allow(incomplete_features)] | |
| #![feature(generic_const_exprs)] | |
| #![feature(specialization)] | |
| pub trait Trait { | |
| type Type; | |
| } | |
| impl<T: ?Sized> Trait for T { | |
| default type Type = [u8; 1]; | |
| } | |
| impl<T: Trait> Trait for *const T { | |
| type Type = [u8; std::mem::size_of::<<T as Trait>::Type>()]; | |
| //~^ ERROR: unconstrained generic constant | |
| } | |
| fn main() {} |