--bin might've worked on cargo cca. 2018 ? unsure
but --example works today

cargo test --release

...if anyone ever tries that.

the following are fixed:

warning: redundant pattern matching, consider using `is_some()`
   --> /home/user/1tmp/ncurses_things/cursive/cursive-macros/src/builder/recipe.rs:354:16
    |
354 |         if let Some(_) = is_option_type(&field.ty) {
    |         -------^^^^^^^---------------------------- help: try: `if is_option_type(&field.ty).is_some()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
    = note: `#[warn(clippy::redundant_pattern_matching)]` on by default

warning: unneeded `return` statement
   --> /home/user/1tmp/ncurses_things/cursive/cursive-macros/src/builder/recipe.rs:576:9
    |
576 | /         return Ok(RecipeAttributes {
577 | |             base,
578 | |             base_parameters,
579 | |             name,
580 | |         });
    | |__________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
    = note: `#[warn(clippy::needless_return)]` on by default
help: remove `return`
    |
576 ~         Ok(RecipeAttributes {
577 +             base,
578 +             base_parameters,
579 +             name,
580 ~         })
    |

warning: use of `unwrap_or_else` to construct default value
   --> /home/user/1tmp/ncurses_things/cursive/cursive-macros/src/builder/recipe.rs:561:49
    |
561 |         let mut name = base_default_name(&base).unwrap_or_else(String::new);
    |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
    = note: `#[warn(clippy::unwrap_or_default)]` on by default

warning: this expression creates a reference which is immediately dereferenced by the compiler
  --> /home/user/1tmp/ncurses_things/cursive/cursive-core/src/views/dialog.rs:35:59
   |
35 |             if let Ok(string) = context.resolve::<String>(&config) {
   |                                                           ^^^^^^^ help: change this to: `config`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
   = note: `#[warn(clippy::needless_borrow)]` on by default

warning: this expression creates a reference which is immediately dereferenced by the compiler
  --> /home/user/1tmp/ncurses_things/cursive/cursive-core/src/views/dialog.rs:43:56
   |
43 |             if let Ok(obj) = context.resolve::<Object>(&config) {
   |                                                        ^^^^^^^ help: change this to: `config`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow

the following are fixed:

warning: writing `&Vec` instead of `&[_]` involves a new object where a slice will do
   --> /home/user/1tmp/ncurses_things/cursive/cursive/src/backends/puppet/observed.rs:422:41
    |
422 |     fn get_observed_screen(fake_screen: &Vec<&str>) -> ObservedScreen {
    |                                         ^^^^^^^^^^ help: change this to: `&[&str]`
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#ptr_arg
    = note: `#[warn(clippy::ptr_arg)]` on by default

warning: `cursive` (lib test) generated 1 warning
warning: statics have by default a `'static` lifetime
  --> /home/user/1tmp/ncurses_things/cursive/cursive/examples/autocomplete.rs:10:17
   |
10 | static CITIES: &'static str = include_str!("assets/cities.txt");
   |                -^^^^^^^---- help: consider removing `'static`: `&str`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_static_lifetimes
   = note: `#[warn(clippy::redundant_static_lifetimes)]` on by default

warnings fixed:

warning: manual implementation of `str::repeat` using iterators
  --> /home/user/1tmp/ncurses_things/cursive/cursive/examples/builder.rs:77:30
   |
77 |           let spaces: String = std::iter::repeat(" ")
   |  ______________________________^
78 | |             .take(cursor + "You wrote `".len())
79 | |             .collect();
   | |______________________^ help: try: `" ".repeat(cursor + "You wrote `".len())`
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#manual_str_repeat
   = note: `#[warn(clippy::manual_str_repeat)]` on by default