compilation failed with latest rust

[milyin]

When I tried to compile 'simple.rs' the following error appeared:

error: setters is a derive mode
--> src\main.rs:7:1
|
7 | #[setters(into)]
| ^^^^^^^^^^^^^^^^

When I commented out '#[setters(into)]' string the other error appeared:

error[E0428]: a type named Simple has already been defined in this module
--> src\main.rs:8:1
|
6 | #[derive(getters, setters)]
| ------- previous definition of Simple here
7 | //#[setters(into)]
8 | / struct Simple {
9 | | field: String,
10 | | }
| |_^ Simple already defined

error[E0308]: mismatched types
--> src\main.rs:15:17
|
15 | s.set_field("there");
| ^^^^^^^ expected struct std::string::String, found reference
|
= note: expected type std::string::String
found type &'static str
= help: here are some functions which might fulfill your needs:
- .escape_debug()
- .escape_default()
- .escape_unicode()
- .to_lowercase()
- .to_uppercase()

error: aborting due to previous error(s)
accessors-test.zip