error[E0046]: not all trait items implemented, missing: `N` --> $DIR/issue-98629.rs:8:1 | LL | const N: usize; | -------------- `N` from trait ... LL | impl const Trait for i32 {} | ^^^^^^^^^^^^^^^^^^^^^^^^ missing `N` in implementation error: aborting due to previous error For more information about this error, try `rustc --explain E0046`.