error[E0308]: mismatched types
  --> $DIR/const-eval-overflow-3b.rs:16:22
   |
LL |     = [0; (i8::MAX + 1u8) as usize];
   |                      ^^^ expected `i8`, found `u8`

error[E0277]: cannot add `u8` to `i8` in const contexts
  --> $DIR/const-eval-overflow-3b.rs:16:20
   |
LL |     = [0; (i8::MAX + 1u8) as usize];
   |                    ^ no implementation for `i8 + u8`
   |
   = help: the trait `~const Add<u8>` is not implemented for `i8`
   = help: the following other types implement trait `Add<Rhs>`:
             <&'a f32 as Add<f32>>
             <&'a f64 as Add<f64>>
             <&'a i128 as Add<i128>>
             <&'a i16 as Add<i16>>
             <&'a i32 as Add<i32>>
             <&'a i64 as Add<i64>>
             <&'a i8 as Add<i8>>
             <&'a isize as Add<isize>>
           and 48 others

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.