error: generic parameters may not be used in const operations --> $DIR/issue-80375.rs:1:41 | LL | struct MyArray([u8; COUNT + 1]); | ^^^^^ cannot perform const operation using `COUNT` | = help: const parameters may only be used as standalone arguments, i.e. `COUNT` = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: aborting due to 1 previous error