error: generic parameters may not be used in const operations --> $DIR/complex-generic-default-expr.rs:6:47 | LL | struct Foo; | ^ 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: generic parameters may not be used in const operations --> $DIR/complex-generic-default-expr.rs:9:62 | LL | struct Bar() }>(T); | ^ 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: aborting due to 2 previous errors