error[E0038]: the trait `Trait` cannot be made into an object --> $DIR/associated-const-in-trait.rs:9:6 | LL | trait Trait { | ----- this trait cannot be made into an object... LL | const N: usize; | - ...because it contains this associated `const` ... LL | impl dyn Trait { | ^^^^^^^^^ the trait `Trait` cannot be made into an object | = help: consider moving `N` to another trait error: aborting due to previous error For more information about this error, try `rustc --explain E0038`.