Rust compile error's

[TheHunterDog]

error[E0658]: use of unstable library feature 'clamp'
   --> src/main.rs:219:52
    |
219 |                     let col = col.map(|x| x.sqrt().clamp(0.0, 0.999) * 256.);
    |                                                    ^^^^^
    |
    = note: see issue #44095 <https://github.com/rust-lang/rust/issues/44095> for more information

error[E0658]: use of unstable library feature 'clamp'
  --> src/math/texture.rs:80:23
   |
80 |             let u = u.clamp(0., 1.);
   |                       ^^^^^
   |
   = note: see issue #44095 <https://github.com/rust-lang/rust/issues/44095> for more information

error[E0658]: use of unstable library feature 'clamp'
  --> src/math/texture.rs:81:28
   |
81 |             let v = 1. - v.clamp(0., 1.);
   |                            ^^^^^
   |
   = note: see issue #44095 <https://github.com/rust-lang/rust/issues/44095> for more information

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0658`.
error: could not compile `rtiow`

I am using macOS

[luliic2]

You are probably running an old version of rust. If you follow the link to the issue, it says it is already stabilized.
If you run rustup update first it should work

[TheHunterDog]

Thank you it works now. Rookie mistake