error[E0277]: the trait bound `String: Copy` is not satisfied
  --> $DIR/const-fn-in-vec.rs:1:47
   |
LL | static _MAYBE_STRINGS: [Option<String>; 5] = [None; 5];
   |                                               ^^^^ the trait `Copy` is not implemented for `String`
   |
   = note: required for `Option<String>` to implement `Copy`
   = note: the `Copy` trait is required because this value will be copied for each element of the array
help: create an inline `const` block
   |
LL | static _MAYBE_STRINGS: [Option<String>; 5] = [const { None }; 5];
   |                                               +++++++      +

error[E0277]: the trait bound `String: Copy` is not satisfied
  --> $DIR/const-fn-in-vec.rs:7:34
   |
LL |     let _strings: [String; 5] = [String::new(); 5];
   |                                  ^^^^^^^^^^^^^ 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: create an inline `const` block
   |
LL |     let _strings: [String; 5] = [const { String::new() }; 5];
   |                                  +++++++               +

error[E0277]: the trait bound `String: Copy` is not satisfied
  --> $DIR/const-fn-in-vec.rs:12:48
   |
LL |     let _maybe_strings: [Option<String>; 5] = [None; 5];
   |                                                ^^^^ the trait `Copy` is not implemented for `String`
   |
   = note: required for `Option<String>` to implement `Copy`
   = note: the `Copy` trait is required because this value will be copied for each element of the array
help: create an inline `const` block
   |
LL |     let _maybe_strings: [Option<String>; 5] = [const { None }; 5];
   |                                                +++++++      +

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0277`.