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: could not evaluate constant pattern --> $DIR/const-eval-overflow-2.rs:15:9 | LL | NEG_NEG_128 => println!("A"), | ^^^^^^^^^^^ error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0080`.