error[E0770]: the type of const parameters must not depend on other generic parameters --> $DIR/issue-71169.rs:5:43 | LL | fn foo() {} | ^^^ the type must not depend on the parameter `LEN` | = note: const parameters may not be used in the type of const parameters error: `[u8; LEN]` is forbidden as the type of a const generic parameter --> $DIR/issue-71169.rs:5:38 | LL | fn foo() {} | ^^^^^^^^^ | = note: the only supported types are integers, `bool` and `char` = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0770`.