error: any use of this value will cause an error --> $DIR/issue-50814.rs:15:21 | LL | const MAX: u8 = A::MAX + B::MAX; | ----------------^^^^^^^^^^^^^^^- | | | attempt to compute `u8::MAX + u8::MAX`, which would overflow | = note: `#[deny(const_err)]` on by default = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 error[E0080]: evaluation of `foo::` failed --> $DIR/issue-50814.rs:21:6 | LL | &Sum::::MAX | ^^^^^^^^^^^^^^^^^ referenced constant has errors error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0080`.