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