Some ImageBuffer instances fail to be saved about image HOT 4 CLOSED

warning: unused `Result` that must be used
  --> src/main.rs:16:5
   |
16 |     image.save("before.jpg"); // Doesn't work
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled
   = note: `#[warn(unused_must_use)]` on by default
help: use `let _ = ...` to ignore the resulting value
   |
16 |     let _ = image.save("before.jpg"); // Doesn't work
   |     +++++++

warning: unused `Result` that must be used
  --> src/main.rs:19:5
   |
19 |     image.to_rgb8().save("after.jpg"); // Works!
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this `Result` may be an `Err` variant, which should be handled
help: use `let _ = ...` to ignore the resulting value
   |
19 |     let _ = image.to_rgb8().save("after.jpg"); // Works!
   |     +++++++

thread 'main' panicked at 'failed to save image: Unsupported(UnsupportedError { format: Exact(Jpeg), kind: Color(Rgb32F) })', src/main.rs:16:30