error[E0080]: evaluation of `test::<0>::{constant#0}` failed --> $DIR/simple_fail.rs:9:10 | LL | [u8; N - 1]: Sized, | ^^^^^ attempt to compute `0_usize - 1_usize`, which would overflow error[E0080]: evaluation of `Arr::<0>::{constant#0}` failed --> $DIR/simple_fail.rs:4:33 | LL | type Arr = [u8; N - 1]; | ^^^^^ attempt to compute `0_usize - 1_usize`, which would overflow error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0080`.