error[E0277]: the trait bound `std::option::Option: std::marker::Copy` is not satisfied --> $DIR/const-fns.rs:18:35 | LL | const ARR: [Option; 2] = [type_no_copy(); 2]; | ^^^^^^^^^^^^^^^^^^^ the trait `std::marker::Copy` is not implemented for `std::option::Option` | = help: the following implementations were found: as std::marker::Copy> = note: the `Copy` trait is required because the repeated element will be copied error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.