error[E0277]: the trait bound `String: Copy` is not satisfied --> $DIR/issue-119530-sugg-from-fn.rs:4:23 | LL | let string_arr = [foo(); 64]; | ^^^^^ the trait `Copy` is not implemented for `String` | = note: the `Copy` trait is required because this value will be copied for each element of the array = help: consider using `core::array::from_fn` to initialize the array = help: see https://doc.rust-lang.org/stable/std/array/fn.from_fn.html for more information error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0277`.