error[E0080]: evaluation of constant value failed
  --> $DIR/const-eval-overflow-2.rs:11:25
   |
LL | const NEG_NEG_128: i8 = -NEG_128;
   |                         ^^^^^^^^ attempt to negate `i8::MIN`, which would overflow

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0080`.