error: generic parameters may not be used in const operations --> $DIR/issue-76701-ty-param-in-const.rs:1:46 | LL | fn ty_param() -> [u8; std::mem::size_of::()] { | ^ cannot perform const operation using `T` | = note: type parameters may not be used in const expressions = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: generic parameters may not be used in const operations --> $DIR/issue-76701-ty-param-in-const.rs:6:42 | LL | fn const_param() -> [u8; N + 1] { | ^ cannot perform const operation using `N` | = help: const parameters may only be used as standalone arguments, i.e. `N` = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: aborting due to 2 previous errors