error[E0080]: evaluation of `test::<0_usize>::{constant#0}` failed --> $DIR/simple_fail.rs:10:48 | LL | fn test() -> Arr where [u8; N - 1]: Sized { | ^^^^^ attempt to compute `0_usize - 1_usize`, which would overflow error[E0080]: evaluation of `Arr::<0_usize>::{constant#0}` failed --> $DIR/simple_fail.rs:6:33 | 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`.